WO2015027506A1 - 存储系统中操作请求处理方法和装置 - Google Patents
存储系统中操作请求处理方法和装置 Download PDFInfo
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- WO2015027506A1 WO2015027506A1 PCT/CN2013/082755 CN2013082755W WO2015027506A1 WO 2015027506 A1 WO2015027506 A1 WO 2015027506A1 CN 2013082755 W CN2013082755 W CN 2013082755W WO 2015027506 A1 WO2015027506 A1 WO 2015027506A1
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- 238000012545 processing Methods 0.000 title claims description 11
- 238000003672 processing method Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 14
- 230000003993 interaction Effects 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 9
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/70—Routing based on monitoring results
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/64—Routing or path finding of packets in data switching networks using an overlay routing layer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
Definitions
- the present invention relates to the field of information technology, and in particular, to an operation request processing method and apparatus in a storage system.
- the metadata server is used to manage the operation request to the storage system and record the metadata of the storage system.
- users access the storage system, they first need to communicate with the metadata server to obtain the metadata needed for the operation request.
- the storage system is based on the global distributed load balancing scheme, and the load balancing of the storage system is implemented according to information exchange between the storage devices.
- information exchange between the storage devices is inconvenient.
- an embodiment of the present invention provides an operation request processing method and apparatus in a storage system, and a non-transitory computer readable storage medium, and a method and a device for generating a flow entry forwarding rule And a non-transitory computer readable storage medium.
- an embodiment of the present invention provides a method for processing an operation request in a storage system, where the storage system includes: a controller, a switch, and a storage device that communicates with the switch, where the controller communicates with the switch, The controller is configured to formulate and deliver a flow table of the switch; the method includes:
- the switch queries the flow table of the switch according to the request identifier, and obtains a flow entry that matches the operation request;
- the switch forwards the operation request to the target storage device in the storage device according to the forwarding rule of the matched flow entry.
- the request identifier is user group information
- the virtual local area network identifier bit of the operation request carries the user group information
- the matched stream The virtual local area network identifier bit of the header field of the entry carries the user group information;
- the Internet Protocol service type bit of the operation request carries the storage policy information
- the Internet Protocol service type bit of the header field of the matched flow entry carries the storage policy information
- the virtual local area network identifier bit of the operation request carries the user group information
- the Internet Protocol service type bit of the operation request carries the storage policy information
- the virtual local area network identifier bit of the header field of the matched flow entry carries the user group information
- the Internet Protocol service type bit of the header field carries the storage policy information.
- the forwarding rule of the matched flow entry is determined by the controller according to the stored data. Storage device traffic load is set.
- the method further includes: the switch updating, by the switch, the number of times that the read flow request is forwarded to the target storage device.
- the matching flow entry is forwarded.
- the forwarding rule is formulated by the controller according to the remaining storage space of the storage device.
- the method further includes:
- the embodiment of the present invention provides a method for generating a flow entry forwarding rule, including: the method is applied to a storage system, where the storage system includes: a controller, a switch, and a storage device that communicates with the switch And the controller is configured to communicate with the switch, where the controller is used to formulate and deliver a flow table of the switch; the method includes:
- the controller acquires remaining storage space information of the storage device in communication with the switch;
- the controller generates a forwarding rule that matches the write request based on the remaining storage space information of the storage device, the write request for writing data to a storage device in communication with the switch.
- the controller acquires the remaining storage space information of the storage device that is in communication with the switch, and specifically includes:
- the controller receives remaining storage space information reported by the storage device.
- the controller acquires the remaining storage space information of the storage device that is in communication with the switch, and specifically includes:
- the controller calculates, according to the storage space of the storage device, the number of write requests, and the size of the write data, the remaining storage space of the storage device.
- the embodiment of the present invention provides a method for generating a flow entry forwarding rule, including: the method is applied to a storage system, where the storage system includes: a controller, a switch, and a storage device that communicates with the switch And the controller is configured to communicate with the switch, where the controller is used to formulate and deliver a flow table of the switch; the method includes:
- the controller acquires traffic load information of the storage device storing the requested data; the controller generates a forwarding rule that matches the read request according to the traffic load information of the storage device storing the requested data.
- the controller acquires The traffic load information of the storage device storing the requested data specifically includes: the controller receiving the traffic load information reported by the storage device storing the requested data.
- the controller where the controller obtains the traffic load information of the storage device that stores the requested data, specifically includes:
- the controller And acquiring, by the controller, the number of times that the flow entry record in the switch flow table forwards the operation request to the storage device that stores the requested data; wherein the operation request includes a write request and a read request.
- an embodiment of the present invention provides a switch, where the switch is applied to a storage system, where the storage system includes: a controller, the switch, and a storage device that communicates with the switch, where the controller Communicating with the switch, the controller is used to formulate and deliver a flow table of the switch; the switch includes:
- a receiving unit configured to receive an operation request, where the operation request carries a request identifier, where the request identifier includes at least one of user group information and storage policy information
- a query unit configured to query the switch according to the request identifier a flow table, obtaining a flow entry that matches the operation request
- a forwarding unit configured to forward the operation request to the target storage device in the storage device according to the forwarding rule of the matched flow entry.
- the forwarding rule of the matched flow entry is a storage device that is stored by the controller according to the requested data.
- the traffic load is formulated.
- the forwarding forwarding rule of the matched flow entry is stored by the controller according to the remaining storage device. Space-developed.
- an embodiment of the present invention provides a controller, where the controller is applied to a storage system, where the storage system includes: the controller, the switch, and the a storage device that communicates with the switch, the controller is in communication with the switch, and the controller is used to formulate and deliver a flow table of the switch; the controller includes:
- An obtaining unit configured to acquire remaining storage space information of the storage device that communicates with the switch
- a generating unit configured to generate, according to the remaining storage space information of the storage device, a forwarding rule that matches a write request, where the write request is used to write data to a storage device that communicates with the switch.
- the acquiring unit is specifically configured to: receive remaining storage space information reported by the storage device.
- the acquiring unit is specifically configured to: obtain, by the flow table entry in the switch flow table, the number of write requests and the size of the write data to the storage device. ;
- the controller calculates a remaining storage space of the storage device according to a storage space of the storage device, the number of write requests, and a size of a write data.
- an embodiment of the present invention provides a controller, where the controller is applied to a storage system, where the storage system includes: the controller, a switch, and a storage device that communicates with the switch, The controller is configured to communicate with the switch, where the controller is used to formulate and deliver a flow table of the switch; the controller includes:
- an obtaining unit configured to acquire traffic load information of the storage device that stores the requested data
- a generating unit configured to generate, according to the traffic load information of the storage device that stores the requested data, a forwarding rule that matches the read request.
- the acquiring unit is configured to: receive the traffic load information reported by the storage device that stores the requested data.
- the acquiring unit is specifically configured to: acquire, by the flow entry record in the switch flow table, the number of times the operation request is forwarded to the storage device that stores the requested data Wherein the operation request includes a write request And read the request.
- an embodiment of the present invention provides a switch, where the switch is applied to a storage system, where the storage system includes: a controller, the switch, and a storage device that communicates with the switch, where the controller and the controller The switch communicates, the controller is used to formulate and deliver a flow table of the switch; the switch includes a central processor and a memory, the central processor and the memory are connected by a bus, and the memory is used to store a computer And the central processor executes the computer instructions stored in the memory to implement the first aspect of the present invention or any of the first to fourth embodiments of the first aspect.
- an embodiment of the present invention provides a controller, where the controller is applied to a storage system, where the storage system includes: the controller, a switch, and a storage device that communicates with the switch, where the controller Communicating with the switch, the controller is used to formulate and deliver a flow table of the switch; the controller includes a central processor and a memory, and the central processor and the memory are connected by a bus, and the memory is used by And storing the computer instructions, the central processor executing the computer instructions stored in the memory to implement the second aspect, the first or second possible implementation manner of the second aspect of the present invention.
- a ninth aspect, the embodiment of the present invention provides a controller, where the controller is applied to a storage system, where the storage system includes: the controller, a switch, and a storage device that communicates with the switch, the controller Communicating with the switch, the controller is used to formulate and deliver a flow table of the switch; the controller includes a central processor and a memory, and the central processor and the memory are connected by a bus, and the memory is used by In the storage of computer instructions, the central processor executes the computer instructions stored in the memory to implement the first or second possible implementation manner of the third aspect, the third aspect of the present invention.
- an embodiment of the present invention provides a non-transitory computer readable storage medium, where the computer storage medium stores computer instructions for implementing the first aspect or the first aspect of the present invention when the computer executes the computer instructions.
- the computer storage medium stores computer instructions for implementing the first aspect or the first aspect of the present invention when the computer executes the computer instructions.
- an embodiment of the present invention provides a non-transitory computer readable storage medium, where the computer storage medium stores computer instructions, and when the computer executes the computer instructions, is used to implement the second aspect of the present invention.
- an embodiment of the present invention provides a non-transitory computer readable storage medium, where the computer storage medium stores computer instructions, and when the computer executes the computer instructions, is used to implement the third aspect of the present invention.
- the computer storage medium stores computer instructions, and when the computer executes the computer instructions, is used to implement the third aspect of the present invention.
- the switch receives the operation request, and the operation request carries the request identifier.
- the switch searches the flow table of the switch according to the request identifier, and obtains a flow entry that matches the operation request, and the switch forwards the flow entry according to the matching flow entry.
- the rule forwards the operation request to the target storage device in the storage device, and utilizes the characteristics of the software-defined network (Sof tware Def ined Network) to process the operation request according to the forwarding rule of the switch flow entry, thereby implementing load balancing of the storage device and reducing storage.
- Information interaction between devices. DRAWINGS software-defined network
- FIG. 1 is a schematic diagram of a method according to an embodiment of the present invention.
- FIG. 2 is a schematic diagram of an object storage system according to an embodiment of the present invention.
- Figure 3 is a software-defined network system diagram based on the OpenFlow protocol
- Figure 4 is a flow table in the switch in the software-defined network
- Figure 5 is a schematic diagram showing the structure of a flow entry in a flow table
- FIG. 6 is a schematic structural diagram of a header field of a flow entry
- FIG. 7 is a schematic diagram of an object operation request processing method of an object storage system according to an embodiment of the present invention.
- FIG. 8 is a schematic diagram of a method for generating a flow entry forwarding rule by a controller according to an embodiment of the present invention
- FIG. 9 is a schematic diagram of a method for generating a flow entry forwarding rule by a controller according to an embodiment of the present invention
- FIG. 8 is a schematic diagram of a method for generating a flow entry forwarding rule by a controller according to an embodiment of the present invention
- FIG. 9 is a schematic diagram of a method for generating a flow entry forwarding rule by a controller according to an embodiment of the present invention
- Figure 11 is a schematic diagram of the controller.
- the embodiment of the present invention is applied to a storage system, where the storage system includes: a controller, a switch, and a storage device that communicates with the switch, where the controller communicates with the switch, and the controller is used to formulate and deliver the switch.
- Flow table The storage system can be a file-level storage system, a block-level storage system, or an object storage system.
- the storage system can also include at least two of a file-level storage system, a block-level storage system, and an object storage system.
- the operation request processing method in the storage system provided by the embodiment of the present invention is as follows:
- the switch receives an operation request, where the operation request carries a request identifier, where the request identifier includes at least one of user group information and storage policy information;
- the switch queries the flow table of the switch according to the request identifier, and obtains a flow entry that matches the operation request;
- the switch forwards the operation request to a target storage device in the storage device according to the forwarding rule of the matched flow entry.
- the virtual local area network identifier of the operation request carries the user group information
- the matched flow entry when the request identifier is the storage policy information, the Internet Protocol service type bit of the operation request carries the storage policy information, and the Internet Protocol service type bit of the header field of the matched flow entry carries the storage policy information ; or
- the virtual local area network identifier bit of the operation request carries the user group information
- the Internet Protocol service type bit of the operation request carries the storage policy information
- the virtual local area network identifier bit of the header field of the matched flow entry carries the user group information
- the Internet Protocol service type bit of the header field carries the storage policy information.
- the forwarding rule of the matched flow entry is determined by the controller according to a storage device traffic load storing the requested data.
- the method further includes: the switch updating the number of times the read request is forwarded to the target storage device recorded in the matched flow entry.
- the forwarding and forwarding rules of the matched flow entry are determined by the controller according to the remaining storage space of the storage device.
- the method further includes: the switch updating the number of times the write request is forwarded to the target storage device recorded in the matched flow entry.
- the request identifier includes at least one of the user group information and the storage policy information, where the user group information may be the IP address information of the client, or the address information of the client, and the storage policy information may be the requested data.
- the user group information may be the IP address information of the client, or the address information of the client, and the storage policy information may be the requested data.
- the processing method for the operation request in the storage system uses the characteristics of the software to define the network, processes the operation request according to the forwarding rule of the switch flow entry, implements load balancing of the storage device, and reduces information between the storage devices. Interaction.
- the object storage system is the basic unit of data storage, one object includes the data of the file and the metadata of the file, and the operation request is an object operation request, including the object read request and the object write request.
- the read request that is, the data requested by the object read request is an object
- the data written by the object write request is an object.
- the storage device is an object storage device. In the embodiment of the present invention, as shown in FIG.
- the object storage system includes a metadata server 103, a controller 104, switches 1051 to 105m, and storage devices 1061, 1062, 1063 to 106L, in the object storage system, that is, object storage.
- L is an integer, which indicates the number of storage devices. The specific value is not limited.
- the metadata server 103 is configured to store request identifiers of data stored in the object storage devices 1061, 1062, 1063 to 106L, here, request identifiers for storing objects stored in the object storage devices 1061, 1062, 1063 to 106L, The request identifier, which will be described later in detail; the object storage devices 1061, 1062, 1063 to 106L for storing data, in the object storage system, that is, for storing objects; the switches 1051 to 105m and the controller 104 constitute a software-defined network, The switches 1051 to 105m communicate with the object storage devices 1061, 1062, 1063 to 106L; the switches 1051 to 105m are configured to forward the operation request to the object storage devices 1061, 1062, 1063 to 106L according to the forwarding rules of the flow entry in the flow table, In the object storage system, that is, the object operation request; the controller 104 is configured to formulate and update the flow entry in the flow table of the switches 1051 to 105m.
- the controller 104 is shown.
- the controller is not limited to only one, and may be configured by multiple controllers to implement load balancing and redundancy.
- the client 1011 to 101n shown in FIG. 2 in an implementation manner, sends an object operation request by the object storage system agent 102, and accesses the object storage devices 1061, 1062, 1063 to 106L, where n is an integer, indicating the number of clients, The specific value is not limited.
- the object storage system agent 102 may be an independent physical server, or may be integrated into the clients 1011 to 101n, which is not limited by the present invention.
- the controllers communicate with switches 1051 through 105m over a secure channel.
- the controller 104 and the switches 1051 to 105m can communicate through the Openflow protocol, and the controller formulates and updates the flow entry of the flow table stored in the switches 1051 to 105m.
- the controller 104 and the switch 1051 are used.
- the Openflow protocol is merely an exemplary description, and the invention is also applicable to other protocols implemented in a software-defined network. Taking the switch 1051 and the controller 104 as an example, as shown in FIG. 3, the controller 104 formulates and updates a flow entry of the flow table in the switch 1051.
- the switch 1051 After the switch 1051 receives the object operation request, the object operation request is parsed at the switch 1051. A flow table entry matching the operation request of the object is queried in the flow table, and the object operation request is processed according to a forwarding rule of the matched flow entry.
- the flow table is composed of a flow entry 1, a flow entry 2, and a flow entry R, where R is a natural number.
- the switch 1051 receives the object operation request, and queries the flow entry of the flow table. The flow entry of the flow table is usually queried by the pipeline. If the flow entry matching the object operation request is queried, according to the The forwarding rules of the matched flow entry are processed.
- the specific structure is as shown in FIG. 5, and includes a packet header field, a counter, and a forwarding rule.
- the header field is used for matching the object operation request; the counter is used to count the number of times the flow table item processes the object operation request; the forwarding rule is used to determine the forwarding method of the object operation request, for example, how to forward the object operation request, and decide to Which port forwards the operation request, etc.
- the packet header field includes an input port, a media access control (MAC) source address, a MAC destination address, an Ethernet type, and a virtual local area network identification (VLAN ID).
- MAC media access control
- VLAN ID virtual local area network identification
- the object operation request in the embodiment of the present invention may encapsulate the request identifier, where the request identifier includes at least one of user group information and storage policy information. Such as the user group letter
- the information is encapsulated in the object operation request.
- the user group information may be encapsulated in the VLAN ID bit of the object operation request
- the storage policy information is encapsulated in the IP ToS bit of the object operation request
- the encapsulation of the request identifier may be represented by the object storage system. 102 completed.
- the switch 1051 After receiving the object operation request, the switch 1051 queries the flow table entry in the flow table of the switch 1051 that matches the object operation request.
- the object operation request is processed according to the forwarding rule of the matched matching flow entry.
- the counter After forwarding the object operation request according to the forwarding rule, the counter updates the number of object operation request forwarding times of the flow entry.
- the object operation request is forwarded to the controller 104, and the controller 104 formulates a forwarding rule for the object operation request, generates a flow entry, and updates the flow table on the switch 1051.
- the embodiment of the present invention provides an object operation request processing method of the object storage system in the system architecture shown in FIG. 2, as shown in FIG. 7, including:
- Step 701 The switch receives an object operation request, where the object operation request carries a request identifier, where the request identifier includes at least one of user group information and storage policy information.
- Step 702 The switch queries the flow table of the switch according to the request identifier, and obtains a flow entry that matches the operation request.
- Step 703 The switch forwards the object operation request to the target object storage device in the object storage device according to the forwarding rule of the matched flow entry.
- the virtual local area network identifier of the object operation request carries the user group information, and the matched flow entry
- the virtual local area network identifier bit of the header field carries the user group information
- the Internet Protocol service type bit of the object operation request carries the storage policy information
- the Internet Protocol service type bit of the header field of the matched flow entry carries the storage policy Information
- the object operation when the request identifier is user group information and storage policy information
- the requested virtual area network identifier carries the user group information
- the Internet Protocol service type bit of the object operation request carries the storage policy information
- the virtual local area network identifier of the header field of the matched flow entry carries The user group information
- the Internet Protocol service type of the header field is the storage policy information.
- the object operation request carrying the request identifier is forwarded to the corresponding object storage device through the switch in the software-defined network, and the controller formulates the forwarding rule in the switch flow entry, and the switch according to the flow
- the forwarding rule in the entry forwards the object read request, implements load balancing of the object storage device, and reduces information interaction between the object storage devices.
- the forwarding rule of the matched flow entry is determined by the controller.
- the object storage device that stores the requested object is traffic-loaded.
- the switch After the switch forwards the object operation request to the target object storage device in the object storage device according to the forwarding rule of the matched flow entry, the switch further includes: the switch updating the record in the matched flow entry The number of times an object read request is forwarded to the object target storage device. The details will be described next.
- the client 101 sends a read request.
- the object storage system agent 102 receives the read request sent by the client 101, and according to the read request, accesses the metadata server 103 to acquire the request identifier of the requested object.
- the request identifier includes at least one of user group information and storage policy information.
- the request identifier is configured to store at least one of user group information and storage policy information carried by the object write request to the metadata server 103 after the object is written to the object storage device, and the request identifier stored by the metadata server 103 is determined by The content storage device that stores the write object determines the content of the request identifier of the object registered with the metadata server 103.
- the query metadata server 103 obtains the request identifier of the object.
- the user group information may be written to the object storage system.
- the IP address information of the client of the object, or other information that can identify the client that writes the object to the object storage system; the storage policy information can be the number of copies of the requested object in the object storage device.
- the request identifier of the object is sent to the metadata server 103.
- the request identifier includes the user group information and the storage policy, where the user group information is the client IP address information of the requested object, and the storage policy information is the number of copies of the requested object.
- the object storage system agent 102 encapsulates the request identifier obtained from the metadata server 103, and generates an object read request.
- the specific format of the object read request is as shown in FIG. 6.
- the user group information is encapsulated into the object.
- the VLAN ID bit of the read operation request encapsulates the storage policy information into the IP ToS bit of the object read operation request.
- the object storage system agent 102 sends an object read request to the switch 1051.
- the switch 1051 receives the object read request sent by the storage system agent 102, parses out the VLAN ID bit and the ToS bit information of the object read request, and obtains the user group information and the storage policy information respectively.
- the flow entry of the flow table is queried according to the parsed user group information and the storage policy information.
- the user group information parsed by the VLAN ID bit of the object read request and the storage policy information parsed from the IP ToS bit of the object read request are respectively matched with the header field of the flow entry, and the matching flow entry is found. Then, forwarding is performed according to the forwarding rule of the matched flow entry.
- the forwarding rule of the flow entry is determined by the controller 104 according to the object storage device traffic load storing the requested object, that is, the target object is selected according to the traffic load of the target storage device where the requested object is located.
- Storage device For example, in the flow table shown in FIG. 4, the flow entry 3 is a flow entry matching the object read request, and the flow entry 3 is structured as shown in FIG. 5, and the VLAN ID of the header field is The information matches the information in the object read request VLAN ID, and the information in the IP ToS bit in the header field matches the information in the object read request IP ToS bit.
- the forwarding rule in the flow entry 3 is generated by the controller 104 according to the traffic load of the object storage device storing the requested object.
- object storage devices 1061, 1062, and 1063 are object storage devices that store 3 copies of the requested object.
- the controller 104 determines that the object storage device 1061 is the object storage device with the smallest traffic load according to the traffic load of the object storage devices 1061, 1062, and 1063, and the forwarding rule is to forward the object read request to the object storage device 1061.
- the controller 104 formulates a forwarding rule according to the traffic load of the object storage devices 1061, 1062, and 1063.
- the switch 1051 periodically reports the number of times the object operation request is forwarded in each flow entry in the flow table to the controller 104, or The controller 104 periodically obtains the number of times the object operation request is forwarded in each flow entry in the flow table from the switch 1051, or the object storage devices 1061, 1062, and 1063 report the traffic load to the controller to update the forwarding of the flow entry.
- Rules where the object operation request includes an object read request and an object write request.
- the controller 104 formulates or updates a forwarding rule of the flow entry according to the number of times of forwarding of the counter record of the flow entry that forwards the object operation request to the object storage devices 1061, 1062, and 1063, for example, the forwarding rule is to store the object.
- the device 1061 forwards the flow operation request of the object operation request to the object storage device 1062.
- the total number of the flow operation entries of the flow table entry counter is 5,000 times.
- the forwarding rule is the target storage device 1062.
- the total number of object operation requests recorded by the flow table entry counters in the above-mentioned one cycle is 5,500 times.
- the controller 104 stores the The traffic load of the object storage devices 1061, 1062, and 1063 of the object, the forwarding rules formulated for the object read request are forwarded to the object storage device 1061.
- the switch 1051 does not query the matching flow entry, the switch 1051 forwards the object read request to the controller 104 by using the Openflow protocol through the secure channel shown in FIG. 2, and the controller 104 reads the request identifier carried by the object.
- the traffic load of the object storage device of the storage request object the flow table entry is formulated for the object read request, and the flow entry is sent to the switch 1051 to update the flow table in the switch 1051, and the switch 1051 is configured according to the controller 104.
- the sent flow entry forwards the object read request.
- the object storage device 1061 is the object storage device with the smallest traffic load, and the switch forwards the object to the port that the object storage device 1061 communicates with the switch 1051 according to the forwarding rule in the matched flow entry 3. Operation request.
- the counter in flow entry 3 updates the number of times the object storage operation request is forwarded to the object storage device 1061.
- the switch 1051 modifies the destination IP address of the object read request to the IP address of the object storage device 1062, modifies the destination MAC address of the object read request to the MAC address of the object storage device 1062, and forwards the modification to the object storage device 1062. After the object reads the request.
- the object storage device 1062 Upon receiving the modified object read request, the object storage device 1062 returns the content of the requested object to the object storage system agent 102.
- the object storage system agent 102 returns the content of the requested object to the client 101.
- the object requested in the embodiment of the present invention has three copies in the object storage device, and the object is read.
- the forwarding rule of the flow entry that matches the request may be to forward the object read request to the two object storage devices, as described in the foregoing embodiment, for example, the forwarding rule is a flow entry that forwards the object operation request to the object storage device 1061.
- the forwarding rule is that the flow entry for forwarding the object operation request to the object storage device 1062 has 45
- the sum of the number of object operation requests recorded by the flow table entry counters in the above-mentioned one cycle is 5,500 times
- the forwarding rule is that there are 50 flow table entries for forwarding the object operation request to the object storage device 1063.
- the sum of the number of object operation requests recorded by each flow entry counter is 6000 times, then in the above one cycle , Object storage device 1061 and 1062 for the traffic load is small
- the target object storage device if the object read request is forwarded to the two target devices, the forwarding rule of the flow entry for the object read request by the controller 104 is to forward the object read request to the object storage devices 1061 and 1062, Thereby achieving the concurrency of object reading and improving the efficiency of object reading request.
- the request identifier carried in the object read request may also include only one of the user group information and the storage policy information, which is not limited by the present invention.
- the controller in the processing method of forwarding the object read request carrying the request identifier to the corresponding object storage device through the switch in the software-defined network, the controller is configured according to the traffic load of the target object storage device.
- the sending object reads the flow entry of the request forwarding rule, and the switch forwards the object read request according to the forwarding rule in the flow entry, which implements load balancing of the object storage device and reduces information interaction between the object storage devices.
- the forwarding rule of the matched flow entry is determined by the controller.
- the object storage device is defined by the remaining storage space.
- the client 101 sends a write request.
- the object storage system agent 102 receives the write request sent by the client 101. Since the object is written to the object storage system, the metadata server 103 does not have the request identifier of the written object, so the object storage system agent 102 The request identifier of the written object is obtained in the write request.
- the request identifier includes at least one of user group information and a storage policy.
- the user group information may be an IP address information of a client that writes the object to the object storage system, or other identifiers may be written to the object storage system.
- Information about the client's information; the storage policy can be the number of copies of the object being written to the object storage device.
- the request identifier includes the user group information and the storage policy, where the user group information is the client IP address information, and the storage policy information is specifically the object requested by the user in the object storage devices 1061, 1062, 1063 to 106L.
- the number of copies, the number of copies of this object is 3.
- the object storage system agent 102 encapsulates the request identifier and generates an object write request.
- the specific format of the object write request is as shown in FIG. 6.
- the object storage system agent 102 encapsulates the obtained request identifier into a specific identifier of the object write request.
- the user group information is encapsulated into the object write request.
- the VLAN ID bit encapsulates the storage policy information into the IP ToS bit of the object write request.
- the object storage system agent 102 sends an object write request to the switch 1051.
- the switch 1051 receives the object write request sent by the object storage system agent 102, analyzes the VLAN ID bit and the IP ToS bit information of the object write request, and obtains the user group information and the storage policy information respectively.
- the flow entry of the flow table is queried according to the parsed user group information and the storage policy information.
- the user group information parsed from the VLAN ID bit of the object write request and the storage policy information parsed from the ToS bit of the object write request are respectively matched with the header field of the flow entry, and the matching flow entry is found. Forward according to the forwarding rule of the flow entry.
- the forwarding rule of the flow entry is determined by the controller 104 according to the remaining storage spaces of the object storage devices 1061, 1062, 1063 to 106L, that is, according to the remaining storage space of the object storage device, the object write is selected.
- the target object storage device into the request For example, in the flow table shown in FIG. 4, the flow entry 3 is a flow entry matching the object write request, and the flow entry 3 is structured as shown in FIG. 5, and the VLAN ID of the header field is The information matches the information in the object write request VLAN ID, and the information in the IP ToS bit in the header field matches the information in the object write request IP ToS bit.
- the operation rule of flow entry 3 is controlled by the controller 104 according to the object storage devices 1061, 1062, 1063 to 106L.
- the remaining storage space is determined, that is, the target storage device is determined according to the size of the remaining storage space of the object storage devices 1061, 1062, 1063 to 106L.
- An implementation manner is that the switch 1051 periodically reports the number of times the object write request is forwarded in each flow entry in the flow table to the controller 104, or the controller 104 periodically obtains the flow table in the flow table from the switch 1051.
- the object recorded in the item is written to the number of request forwardings, or the object storage devices 1061, 1062, 1063 to 106L report the remaining storage space to the controller 104.
- the remaining storage space of each object storage device is calculated according to the number of object modification requests and the size of the object to be forwarded to each object storage device according to the statistics of each flow entry in the flow table of the switch 1051.
- the object storage device 1061 is taken as an example, and the controller 104 writes the number of object write requests forwarded to the object storage device 1061 according to each flow entry and writes according to each object write request.
- the size of the object is calculated, and the total size of the object stored in the object storage device 1061 is calculated, and the used storage space is subtracted according to the total storage space of the object storage device 1061, thereby obtaining the remaining storage space of the object storage device 1061.
- the remaining storage space of the object storage devices 1062 to 106L in the cycle can be obtained.
- the switch 1051 forwards to the controller 104 through the secure channel shown in FIG. 3 using the Openflow protocol.
- the object write request the controller 104 formulates a forwarding rule for the object write request according to the remaining storage space of the current object storage devices 1061, 1062, 1063 to 106L, generates a flow entry 3 of the embodiment of the present invention, and generates the flow The entry 3 is sent to the switch 1051.
- the switch 1051 updates the flow table according to the flow entry 3.
- the object write request is forwarded according to the forwarding rule of the flow entry 3.
- the number of copies of the object to be written is 3, and the Bay ij controller 104 selects the largest remaining storage space from the object storage devices 1061, 1062, 1063 to 106L.
- Three object storage devices are used as target object storage devices.
- the object storage devices 1064, 1067, and 1068 are the three object storage devices with the largest remaining storage space, and the remaining storage space is 1000 G, and the remaining storage space of other object storage devices is smaller than The 1000G, or the object storage devices 1064, 1067, and 1068 are the three object storage devices with the largest remaining storage space.
- the remaining storage space is 1000G, 950G, and 900G, and the remaining storage space of other object storage devices is less than 900G.
- the operational rules that controller 104 sets for the object write request are therefore to forward the object write request to object storage devices 1064, 1067, and 1068.
- the object write request is forwarded to the destination port of the switch 1051 according to the flow entry 3 forwarding rule, wherein the destination port of the switch 1051 is a port that the switch 1051 communicates with the object storage devices 1064, 1067, and 1068, respectively.
- the controller 104 records the object storage device information of the object according to the request identifier carried by the object write request, and uses the recorded object storage device information of the object to obtain the traffic load of the object storage device storing the object, according to Storing a traffic load of the object storage device of the object, and formulating a forwarding rule for reading an object read request of the object, and generating a flow entry matching the object read request of the object, where the flow entry carries the object
- the request identifier, the request identifier carried in the object read request is matched with the request identifier carried in the flow entry, to determine a matching flow entry.
- For the specific process refer to the description of the read request part of the embodiment object, and details are not described herein. .
- the switch 1051 modifies the destination IP address of the object write request to the IP address of the object storage device 1062, and modifies the destination MAC address of the object write request to the MAC address of the target storage device 1062, in the embodiment of the present invention.
- the forwarding rule of the matching flow entry is forwarded to the object storage devices 1064, 1067, and 1068, respectively, and the destination IP address of the object write request is modified to the IP address of the object storage device 1064.
- the destination MAC address of the object write request is modified to the MAC address of the object storage device 1064, and the modified object write request is forwarded to the object storage device 1064.
- the forwarding to the object storage devices 1067 and 1068 is modified.
- the counter in flow entry 3 updates the number of times the object write request is forwarded to object storage devices 1064, 1067, and 1068, respectively.
- Object storage devices 1064, 1067, and 1068 store the objects that are written.
- the request identifier of the write object is registered with the metadata server 103.
- the metadata server 103 may not store the specific storage location information of the object, and only needs to include the request identifier of the object.
- the request identifier carried by the object write request may also include only one of user group information and storage policy information, which is not limited by the present invention.
- the request identifier includes at least user group information.
- a method for sending an object write request carrying a request identifier to a corresponding object storage device through a switch in a software-defined network the controller according to the remaining storage space of the object storage device
- the forwarding rule of the object is written to the request to generate a flow entry of the switch, and the switch forwards the object write request according to the forwarding rule of the matched flow entry, thereby implementing load balancing of the storage space of the object storage device, and reducing the storage between the object storage devices.
- Information interaction At the same time, for objects that are written to the object storage system, the metadata server can only record the request ID of the object, thereby reducing the workload of the metadata server.
- the object storage device 1061 ( L+1 ) when an object storage device joins, when the object storage device 1061 ( L+1 ) joins, the object storage device 1061 ( L+1 ) registers with the controller 104 to the controller.
- the information registered by 104 includes the MAC address of the object storage device 1061 ( L+1 ), the port number in communication with the switch 1051, and the storage space.
- the controller 104 After receiving the registration information of the object storage device 1061 ( L+1 ), the controller 104 records the registration information of the object storage device 1061 ( L+1 ), and formulates a forwarding rule, generates a new flow entry, and delivers the new flow entry to the switch 1051. The flow entry.
- the controller 104 when the object storage device in the object storage system exits due to a failure or other reasons, such as taking the object storage device 1061L as an example, the controller 104 receives the object storage device 1061L state change message.
- the message carries the MAC address of the object storage device 1061L, the port number that communicates with the switch 1051, and The storage space information, the controller 104 changes the message according to the state, and the controller 104 deletes the forwarding rule to be a flow entry forwarded to the target storage device 1061L.
- the forwarding rule is a flow entry that forwards the object read request to the object storage device 1061L, and the controller 104 generates a flow entry that is forwarded to the redundant object storage device of the object storage device 1061L.
- the redundant object storage device is an object storage device that stores an object in the object storage device 1061L.
- the use of a software-defined network in the object storage system achieves an increase or decrease in the object storage device of the object storage system, which enhances the flexibility of the object storage system.
- the controller 104 provides a method for generating a flow entry forwarding rule according to the embodiment of the operation request processing method in the storage system. As shown in FIG. 8, the method includes:
- Step 801 The controller acquires remaining storage space information of the storage device that communicates with the switch.
- Step 802 The controller generates, according to the remaining storage space information of the storage device, a forwarding rule that matches a write request, and the write request is used to write data to a storage device that communicates with the switch.
- the controller obtains the remaining storage space information of the storage device that is in communication with the switch, and the method includes: the controller receiving the remaining storage space information reported by the storage device.
- the controller obtains the remaining storage space information of the storage device that communicates with the switch, and the method includes: the controller acquiring the flow entry record in the switch flow table, and forwarding the write to the storage device. The number of requests and the size of the write data; the controller calculates the remaining storage space of the storage device according to the storage space of the storage device, the number of write requests, and the size of the write data.
- the controller 104 of the embodiment of the present invention provides a method for generating a flow entry forwarding rule, where the storage device is specifically an object storage device, and the write request is specifically an object write request, and then the object is written according to the object.
- Incoming request to write to the object storage device The data is an object.
- the controller in the software-defined network generates a forwarding rule of the flow entry matching the write request according to the remaining storage space information of the storage device, so that the switch generates the forwarding rule according to the controller. Processing write requests, load balancing of storage devices, and reducing information interaction between storage devices.
- the storage system to which the embodiments of the present invention are applicable may be a file level storage system, a block level storage system, or an object storage system. It can also include at least two storage systems of file-level storage systems, block-level storage systems, and object storage systems.
- object storage system reference may be made to the embodiment of processing the object operation request in the object operating system described above, which is not described herein.
- the controller 104 provides a method for generating a flow entry forwarding rule. As shown in FIG. 9, the method includes:
- the controller acquires traffic load information of a storage device that stores the requested data.
- the controller generates a forwarding rule that matches the read request according to the traffic load information of the storage device that stores the requested data.
- the controller acquires the traffic load information of the storage device that stores the requested data, and specifically includes: the controller receiving the traffic load information reported by the storage device that stores the requested data.
- the controller acquires the traffic load information of the storage device that stores the requested data, and specifically includes: the controller acquiring, by the flow table entry in the switch flow table, the data requested by the storage device. The number of times the storage device forwards the operation request; wherein the operation request includes a write request and a read request.
- the controller 104 of the embodiment of the present invention provides a method for generating a flow entry forwarding rule, where the storage device is specifically an object storage device, and the read request is specifically an object read request, and then the object is read according to the object.
- the data stored in the object storage device requested by the request is taken as an object.
- the controller in the software-defined network generates a forwarding rule of the flow entry matching the read request according to the traffic load of the storage device storing the requested data, so that the switch is based on the controller.
- the generated forwarding rule processes the read request, implements load balancing of the storage device, and reduces information interaction between the storage devices.
- the storage system to which the embodiments of the present invention are applicable may be a file level storage system, a data block level storage system, or an object storage system.
- a hybrid storage system of at least two of a file level storage system, a block level storage system, and an object storage system may also be included.
- the object storage system refer to the embodiment of the object operating system in the above object operating system, and details are not described herein.
- a software-defined network is used in the storage system.
- the controller may be implemented as a general-purpose server and run controller software to implement control on the switch in the data forwarding plane.
- the general server structure usually includes a central processing unit, a memory, etc., and the central processing unit is connected to the memory via a bus, and the controller and the switch perform the communication described in the above embodiments.
- the switch that processes the data forwarding plane it may be a general-purpose switch or an Openflow switch, including a central processing unit, a memory, etc., and the central processor and the memory are connected by a bus, and communicate with the controller in the above embodiment, and simultaneously Implement forwarding of object operation requests.
- the controllers and switches in the embodiments of the present invention are merely exemplary descriptions, and other switches and controllers that implement software-defined networks may also be used to implement the present invention.
- an embodiment of the present invention provides a switch, as shown in FIG. 10, including a receiving unit 1001, a query unit 1002, and a forwarding unit 1003.
- the receiving unit 1001 is configured to receive an operation request.
- the operation request carries a request identifier, where the request identifier includes at least one of user group information and storage policy information
- the query unit 1002 is configured to: according to the request identifier, query a flow table of the switch, obtain the operation
- the forwarding unit 1003 is configured to forward the operation request to the target storage device in the storage device according to the forwarding rule of the matched flow entry.
- the forwarding rule of the matched flow entry is determined by the controller according to a storage device traffic load storing the requested data.
- the forwarding rule of the matching flow entry is determined by the controller according to the remaining storage space of the storage device.
- the receiving unit 1001 is configured to receive an object operation request, where the object operation request carries a request identifier, where the request identifier includes at least one of user group information and storage policy information;
- the unit 1002 is configured to: according to the request identifier, query a flow table of the switch, and obtain a flow entry that matches the object operation request;
- the forwarding unit 1003 is configured to store the object according to the forwarding rule of the matched flow entry.
- the target object storage device in the device forwards the object operation request.
- the forwarding rule of the matched flow entry is determined by the controller according to the object storage device traffic load storing the requested object.
- the forwarding forwarding rule of the matched flow entry is determined by the controller according to the remaining storage space of the object storage device.
- the controller formulates the forwarding rule in the switch flow entry, and the switch according to the flow
- the forwarding rule forwarding operation request in the entry implements load balancing of the storage device and reduces information interaction between the storage devices.
- the embodiment of the present invention provides a controller, as shown in FIG. 11, including an obtaining unit 1101 and a generating unit 1102.
- the acquiring unit 1101 is configured to acquire a storage device that communicates with the switch.
- a storage unit 1102 configured to generate, according to the remaining storage space information of the storage device, a forwarding rule that matches a write request, where the write request is used to write data to a storage device that communicates with the switch .
- An implementation unit, where the acquiring unit 1101 is specifically configured to: The remaining storage space information reported by the storage device;
- the method is specifically configured to: obtain, by the flow table entry in the switch flow table, the number of write requests and the size of the write data to the storage device; according to the storage space of the storage device, the number of write requests, and write Into the data size, calculate the remaining storage space of the storage device.
- the obtaining unit 1101 is configured to acquire the remaining storage space information of the object storage device that communicates with the switch, and the generating unit 1102 is configured to generate and write the object according to the remaining storage space information of the object storage device.
- a matching forwarding rule is requested, the object write request for writing an object to an object storage device in communication with the switch.
- the acquiring unit 1101 is specifically configured to: receive remaining storage space information reported by the object storage device;
- the method is specifically configured to: obtain, according to a flow entry record in the switch flow table, a number of times of writing an object write request to the object storage device and a size of the write object; and writing, according to the storage space of the object storage device, the object The number of requests and the size of the written object, and the remaining storage space of the object storage device is calculated.
- the controller provided by the embodiment of the present invention uses a software-defined network, and the controller formulates a forwarding rule matching the switch flow entry and the write request according to the remaining storage space of each storage device of the storage system, thereby implementing load balancing of each storage device and reducing storage. Information interaction between devices.
- the embodiment of the present invention provides a controller.
- the controller includes an obtaining unit 1101 and a generating unit 1102.
- the acquiring unit 1101 is used. And acquiring the traffic load information of the storage device storing the requested data; and generating unit 1102, configured to generate, according to the traffic load information of the storage device that stores the requested data, a forwarding rule that matches the read request.
- the acquiring unit 1101 is specifically configured to: receive the traffic load information reported by the storage device that stores the requested data.
- the acquiring unit 1101 The method is configured to: obtain the number of times the flow table entry record in the switch flow table records the operation request to the storage device that stores the requested data; wherein the operation request includes a write request and a read request.
- the obtaining unit 1101 is configured to acquire traffic load information of the object storage device storing the requested object, and the generating unit 1102 is configured to use the traffic load information of the object storage device that stores the requested object according to the , generates a forwarding rule that matches the object read request.
- the obtaining unit 1101 is configured to: receive the traffic load information reported by the object storage device that stores the requested object.
- the acquiring unit 1101 is configured to: obtain the number of times that the flow table entry record in the switch flow table forwards the object operation request to the object storage device that stores the requested object; wherein, the object The operation request includes an object write request and an object read request.
- the controller provided by the embodiment of the present invention uses a software-defined network, and the controller establishes a forwarding rule that matches the flow entry of the switch to the read request according to the traffic load of the storage device that stores the requested data, thereby implementing the load of each storage device. Balance, reducing information interaction between storage devices.
- the device and the unit described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
- the units described as separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment scheme.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable non-volatile storage medium.
- the medium includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
- the foregoing non-volatile storage medium includes: a medium that can store program codes, such as a USB flash drive, a removable hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk.
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EP13883349.6A EP2858329B1 (en) | 2013-08-31 | 2013-08-31 | Method and device for generating a flow table entry forwarding rule |
KR1020167007130A KR101864813B1 (ko) | 2013-08-31 | 2013-08-31 | 저장 시스템에서 조작 요청을 처리하기 위한 방법 및 장치 |
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AU2013398869A AU2013398869B2 (en) | 2013-08-31 | 2013-08-31 | Method and apparatus for processing operation request in storage system |
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RU2016111127A RU2630377C1 (ru) | 2013-08-31 | 2013-08-31 | Способ и устройство для обработки запроса операции в системе хранения данных |
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US15/871,317 US10218618B2 (en) | 2013-08-31 | 2018-01-15 | Method and apparatus for processing operation request in storage system |
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