CN106210147B - Load balancing method and device based on polling - Google Patents
Load balancing method and device based on polling Download PDFInfo
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- CN106210147B CN106210147B CN201610820866.6A CN201610820866A CN106210147B CN 106210147 B CN106210147 B CN 106210147B CN 201610820866 A CN201610820866 A CN 201610820866A CN 106210147 B CN106210147 B CN 106210147B
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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
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/45—Network directories; Name-to-address mapping
- H04L61/4505—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols
- H04L61/4511—Network directories; Name-to-address mapping using standardised directories; using standardised directory access protocols using domain name system [DNS]
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Abstract
The application discloses a load balancing method and a device based on polling, wherein the method comprises the following steps: receiving a DNS request of a client; the read configuration file is placed into an internal memory by using the PIPE; when the polling strategy is judged to be adopted, a target IP address is obtained according to the polling strategy, and the target IP address is returned to the client; and accessing the network storage system by using the target IP address. According to the polling-based load balancing method and device, the client access pressure can be distributed to each cluster node in a sequential manner, the occupation of data network bandwidth is not influenced, and the influence on the data IO performance is not caused.
Description
Technical Field
The invention belongs to the technical field of distributed storage software, and particularly relates to a load balancing method and device based on polling.
Background
In the era of information explosion, data which can be acquired by people grows in an exponential mode, so that the mode of expanding the storage capacity of a computer file system by simply increasing the number of hard disks is poor in performance in the aspects of capacity size, capacity growth speed, data backup, data safety and the like.
The distributed file system effectively solves the problems of data storage and management, and the distributed file system expands a certain file system fixed at a certain place to any multiple places/multiple file systems, and a plurality of nodes form a file system network. Each node may be distributed at different locations, with communication and data transfer between nodes over the network. When using a distributed file system, one does not need to care about which node the data is stored on or retrieved from, but only needs to manage and store the data in the file system as if using a local file system.
The client accesses the network storage system service (including four file sharing services of CIFS, NFS, FTP and HTTP) through the domain name. When the client can access through the configured domain name, the domain name server returns the corresponding virtual IP address according to the configured load balancing mechanism, and the end user actually establishes network storage system connection with the cluster node through the IP address.
However, when the distributed file system is in operation, the client requests are all concentrated on one node, if the node of the cluster end is down or has network access failure, the client access connection concentrated on the node will be affected, and if the distributed file system has no access redundancy mechanism, the client access connection will be affected by the failure of the cluster node.
Disclosure of Invention
In order to solve the above problems, the present invention provides a load balancing method and device based on polling, which can allocate client access pressure to each cluster node in a sequential manner, and do not affect occupation of data network bandwidth or impact on data IO performance.
The invention provides a load balancing method based on polling, which comprises the following steps:
receiving a DNS request of a client;
the read configuration file is placed into an internal memory by using the PIPE;
when the polling strategy is judged to be adopted, a target IP address is obtained according to the polling strategy, and the target IP address is returned to the client;
and accessing the network storage system by using the target IP address.
Preferably, in the above-mentioned polling-based load balancing method,
after the step of using the PIPE to place the read configuration file into the memory further comprises the following steps:
and judging whether a polling strategy is adopted or not, and if not, adopting other strategies.
Preferably, in the above-mentioned polling-based load balancing method,
the acquiring the target IP address according to the polling strategy comprises the following steps:
polling the corresponding physical IP address in the address pool to select a physical node;
and polling the virtual IP address corresponding to the physical node to select a final target IP address.
Preferably, in the above-mentioned polling-based load balancing method,
before the receiving the DNS request of the client, the method further includes:
and storing the virtual IP address of the high-availability module in a corresponding table of the physical IP address and the virtual IP address.
Preferably, in the above-mentioned polling-based load balancing method,
the step of storing the virtual IP address of the high availability module in the correspondence table between the physical IP address and the virtual IP address further includes:
and dividing all the virtual IP addresses into a plurality of virtual IP address groups according to the physical nodes, wherein all the virtual IP addresses in the same group correspond to the same physical node.
The invention provides a load balancing device based on polling, which comprises:
a receiving unit, configured to receive a DNS request of a client;
the loading unit is used for loading the read configuration file into the memory by using the PIPE;
the return unit is used for acquiring a target IP address according to the polling strategy and returning the target IP address to the client when the polling strategy is judged to be adopted;
and the access unit is used for accessing the network storage system by using the target IP address.
Preferably, in the above-mentioned polling-based load balancing apparatus,
further comprising:
and the judging unit is used for judging whether a polling strategy is adopted or not, and if not, other strategies are adopted.
Preferably, in the above-mentioned polling-based load balancing apparatus,
the return unit is specifically configured to:
polling the corresponding physical IP address in the address pool to select a physical node;
and polling the virtual IP address corresponding to the physical node to select a final target IP address.
Preferably, in the above-mentioned polling-based load balancing apparatus,
further comprising:
and the storage unit is used for storing the virtual IP address of the high-availability module in a corresponding table of the physical IP address and the virtual IP address.
Preferably, in the above-mentioned polling-based load balancing apparatus,
the storage unit is specifically configured to divide all the virtual IP addresses into a plurality of virtual IP address groups according to the physical nodes, where all the virtual IP addresses in the same group correspond to the same physical node.
As can be seen from the above description, the polling-based load balancing method and apparatus provided by the present invention, because the method includes: the method comprises the steps of firstly receiving a DNS request of a client, then utilizing the PIPE to place a read configuration file into a memory, then obtaining a target IP address according to a polling strategy when the polling strategy is judged to be adopted, returning the target IP address to the client, and finally utilizing the target IP address to access a network storage system, so that the access pressure of the client can be distributed to all cluster nodes in a sequential mode, the bandwidth of a data network is not occupied, and the IO performance of data is not influenced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of a first polling-based load balancing method according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a first polling-based load balancing apparatus according to an embodiment of the present application;
fig. 3 is a schematic diagram of the overall architecture of load balancing.
Detailed Description
The core idea of the invention is to provide a load balancing method and device based on polling, which can distribute client access pressure to each cluster node in a sequential manner without affecting occupation of data network bandwidth and influence on data IO performance.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 shows a first polling-based load balancing method provided in an embodiment of the present application, and fig. 1 is a schematic diagram of the first polling-based load balancing method provided in the embodiment of the present application. The method comprises the following steps:
s1: receiving a DNS request of a client;
that is, when a user needs access, a DNS request is initiated by the client indicating that access is needed.
S2: the read configuration file is placed into an internal memory by using the PIPE;
the PIPE is a channel, and the corresponding configuration file is read and then is put into the memory for subsequent use.
S3: when the polling strategy is judged to be adopted, a target IP address is obtained according to the polling strategy, and the target IP address is returned to the client;
it should be noted that, based on the polling policy, a highly available IP address can be selected, load balancing is implemented, and a failure caused by a situation that client requests are concentrated on a certain node is avoided.
S4: and accessing the network storage system by using the target IP address.
In this case, all access requests are distributed on different IP addresses, which is more balanced and does not cause the problem of too centralized access.
As can be seen from the above description, the polling-based load balancing method provided in the embodiment of the present application includes: the method comprises the steps of firstly receiving a DNS request of a client, then utilizing the PIPE to place a read configuration file into a memory, then obtaining a target IP address according to a polling strategy when the polling strategy is judged to be adopted, returning the target IP address to the client, and finally utilizing the target IP address to access a network storage system, so that the access pressure of the client can be distributed to all cluster nodes in a sequential mode, the bandwidth of a data network is not occupied, and the IO performance of data is not influenced.
The second polling-based load balancing method provided in the embodiment of the present application is based on the first polling-based load balancing method, and further includes the following technical features:
after the step of using the PIPE to place the read configuration file into the memory further comprises the following steps:
and judging whether a polling strategy is adopted or not, and if not, adopting other strategies.
That is, polling is only one of the policies, and the scheme does not exclude other policies as long as load balancing can be achieved.
The third polling-based load balancing method provided in the embodiment of the present application is based on the second polling-based load balancing method, and further includes the following technical features:
the acquiring the target IP address according to the polling strategy comprises the following steps:
polling the corresponding physical IP address in the address pool to select a physical node;
and polling the virtual IP address corresponding to the physical node to select a final target IP address.
Specifically, the distributed file system performs load balancing according to a polling mechanism, performs polling twice in a polling mode, first polls a corresponding physical IP in an address pool, then polls a virtual IP corresponding to a selected physical node, and selects a final IP.
A fourth load balancing method based on polling provided in the embodiment of the present application is based on the third load balancing method based on polling, and further includes the following technical features:
before the receiving the DNS request of the client, the method further includes:
and storing the virtual IP address of the high-availability module in a corresponding table of the physical IP address and the virtual IP address.
When the client can access the cluster node through the domain name, the distributed cluster file system has high available load balancing service, and the load balancing module stores forward resolution relations between the domain name and all virtual IP addresses specified by the node high available module and provides domain name resolution service for the client. In this case, the virtual IP addresses of the highly available modules can be identified, and a basis can be provided for subsequent polling, thereby achieving load balancing.
The fifth polling-based load balancing method provided in the embodiment of the present application is based on the fourth polling-based load balancing method, and further includes the following technical features:
the step of storing the virtual IP address of the high availability module in the correspondence table between the physical IP address and the virtual IP address further includes:
and dividing all the virtual IP addresses into a plurality of virtual IP address groups according to the physical nodes, wherein all the virtual IP addresses in the same group correspond to the same physical node.
In this case, it is possible to realize that a plurality of clients access the same physical node by a plurality of virtual IP addresses, and when the physical node is in a high availability state, it is possible to realize access of a plurality of clients.
Fig. 2 shows a first polling-based load balancing apparatus provided in an embodiment of the present application, and fig. 2 is a schematic diagram of the first polling-based load balancing apparatus provided in the embodiment of the present application. The device includes:
a receiving unit 201, configured to receive a DNS request of a client, and when a user needs to access, initiate a DNS request through the client to indicate that access is needed;
an input unit 202, configured to input the read configuration file into a memory by using a PIPE, where the PIPE is a channel, and the read configuration file is then input into the memory for subsequent use;
the returning unit 203 is configured to, when it is determined that the polling policy is adopted, obtain a target IP address according to the polling policy, return the target IP address to the client, and based on the polling policy, select a highly available IP address, implement load balancing, and avoid a failure caused by a situation where client requests are concentrated on a certain node;
the accessing unit 204 is configured to access the network storage system by using the target IP address, in which case, all access requests are dispersed on different IP addresses, which is more balanced, and the problem of too centralized access is not caused.
As can be seen from the above description, the polling-based load balancing device provided in the embodiment of the present application can allocate the client access pressure to each cluster node in a sequential manner, and does not affect occupation of data network bandwidth or impact on data IO performance.
The second polling-based load balancing device provided in the embodiment of the present application is based on the first polling-based load balancing device, and further includes the following technical features:
and the judging unit is used for judging whether a polling strategy is adopted or not, and if not, other strategies are adopted.
That is, polling is only one of the policies, and the scheme does not exclude other policies as long as load balancing can be achieved.
The third polling-based load balancing device provided in the embodiment of the present application is based on the second polling-based load balancing device, and further includes the following technical features:
the return unit is specifically configured to:
polling the corresponding physical IP address in the address pool to select a physical node;
and polling the virtual IP address corresponding to the physical node to select a final target IP address.
Specifically, the distributed file system performs load balancing according to a polling mechanism, performs polling twice in a polling mode, first polls a corresponding physical IP in an address pool, then polls a virtual IP corresponding to a selected physical node, and selects a final IP.
A fourth polling-based load balancing apparatus provided in the embodiment of the present application is based on the third polling-based load balancing apparatus, and further includes the following technical features:
and the storage unit is used for storing the virtual IP address of the high-availability module in a corresponding table of the physical IP address and the virtual IP address.
When the client can access the cluster node through the domain name, the distributed cluster file system has high available load balancing service, and the load balancing module stores forward resolution relations between the domain name and all virtual IP addresses specified by the node high available module and provides domain name resolution service for the client. In this case, the virtual IP addresses of the highly available modules can be identified, and a basis can be provided for subsequent polling, thereby achieving load balancing.
The fifth polling-based load balancing device provided in the embodiment of the present application is based on the fourth polling-based load balancing device, and further includes the following technical features:
the storage unit is specifically configured to divide all the virtual IP addresses into a plurality of virtual IP address groups according to the physical nodes, where all the virtual IP addresses in the same group correspond to the same physical node.
In this case, it is possible to realize that a plurality of clients access the same physical node by a plurality of virtual IP addresses, and when the physical node is in a high availability state, it is possible to realize access of a plurality of clients.
The following describes the above apparatus in detail by taking fig. 3 as an example, and fig. 3 is a schematic diagram of a load balancing overall architecture. DNS-based load balancing is an efficient load balancing solution. Only the domain name access NAS service is needed for a client, the domain name resolution request is mapped into a virtual IP based on the load balance of the DNS, the client accesses and finally performs data interaction through the virtual IP, and the virtual IP and an actual node in a cluster have a mapping relation of the response. When a certain node is down or the service is abnormal, the corresponding virtual IP is transferred to other nodes, and the process is transparent to users and cannot influence the sharing use. The load balancing module takes PowerDNS software as a DNS service component, and is connected with the distributed cluster file system load balancing module through a PIPE mode to realize load balancing. The SNMP Agent end operates at all nodes of the distributed cluster and is mainly responsible for collecting and sending information: and collecting the information of the Agent end, sending the collected information to the management end, and receiving the information by SmartConnect.
In summary, by using the method and the device, load balancing of the client requests can be completed on the distributed cluster file system. And combining the virtual IP provided by the high-availability module to complete the redundant access to the NAS connection of the client. The load balancing achieved by the polling method has the following advantages: the client access is transparent, and the fault switching has no influence on the client access; the load balancing process does not occupy the bandwidth of a data network and has no influence on the IO performance.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. A method for round-robin based load balancing, comprising:
receiving a DNS request of a client;
the read configuration file is placed into an internal memory by using the PIPE;
when the polling strategy is judged to be adopted, acquiring a high-availability target IP address according to the polling strategy, and returning the target IP address to the client;
accessing a network storage system by using the target IP address;
after the step of using the PIPE to place the read configuration file into the memory further comprises the following steps:
judging whether a polling strategy is adopted or not, and if not, adopting other strategies;
the acquiring the target IP address according to the polling strategy comprises the following steps:
polling the corresponding physical IP address in the address pool to select a physical node;
polling the virtual IP address corresponding to the physical node to select a final target IP address;
before the receiving the DNS request of the client, the method further includes:
and storing the virtual IP address of the high-availability module in a corresponding table of the physical IP address and the virtual IP address.
2. The poll based load balancing method of claim 1,
the step of storing the virtual IP address of the high availability module in the correspondence table between the physical IP address and the virtual IP address further includes:
and dividing all the virtual IP addresses into a plurality of virtual IP address groups according to the physical nodes, wherein all the virtual IP addresses in the same group correspond to the same physical node.
3. A poll-based load balancing apparatus, comprising:
a receiving unit, configured to receive a DNS request of a client;
the loading unit is used for loading the read configuration file into the memory by using the PIPE;
the return unit is used for acquiring a high-availability target IP address according to the polling strategy and returning the target IP address to the client when the polling strategy is judged to be adopted;
the access unit is used for accessing the network storage system by utilizing the target IP address;
the judging unit is used for judging whether a polling strategy is adopted or not, and if not, other strategies are adopted;
the return unit is specifically configured to:
polling the corresponding physical IP address in the address pool to select a physical node;
polling the virtual IP address corresponding to the physical node to select a final target IP address;
further comprising:
and the storage unit is used for storing the virtual IP address of the high-availability module in a corresponding table of the physical IP address and the virtual IP address.
4. The poll based load balancing apparatus of claim 3,
the storage unit is specifically configured to divide all the virtual IP addresses into a plurality of virtual IP address groups according to the physical nodes, where all the virtual IP addresses in the same group correspond to the same physical node.
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| CN106790565B (en) * | 2016-12-27 | 2019-11-29 | 中国电子科技集团公司第五十二研究所 | A kind of network attached storage group system |
| CN109218250A (en) * | 2017-06-29 | 2019-01-15 | 北京多点在线科技有限公司 | DDOS defence method and system based on failure Autonomic Migration Framework system |
| CN107493351B (en) * | 2017-10-09 | 2021-06-29 | 郑州云海信息技术有限公司 | Load balancing method and device for client to access storage system |
| CN108833519A (en) * | 2018-06-05 | 2018-11-16 | 福建十方融汇科技有限公司 | A kind of storage cluster method and system |
| CN109347944A (en) * | 2018-10-11 | 2019-02-15 | 郑州云海信息技术有限公司 | A kind of domain name analytic method and device |
| CN109347947A (en) * | 2018-10-15 | 2019-02-15 | 郑州云海信息技术有限公司 | A kind of method of load balancing, name server and cluster nas server |
| CN109218442A (en) * | 2018-10-18 | 2019-01-15 | 郑州云海信息技术有限公司 | A kind of load-balancing method and device of distributed file system |
| CN111225003B (en) * | 2018-11-23 | 2022-12-27 | 京东科技控股股份有限公司 | NFS node configuration method and device |
| CN111475289B (en) * | 2020-03-26 | 2024-04-12 | 北京世纪家天下科技发展有限公司 | Load balancing method and device |
| CN111935329B (en) * | 2020-07-16 | 2023-03-31 | 郑州悉知信息科技股份有限公司 | Domain name resolution method and device |
| CN111711716B (en) * | 2020-08-20 | 2020-12-04 | 苏州浪潮智能科技有限公司 | Domain name resolution method, device and equipment and readable storage medium |
| CN112040023B (en) * | 2020-08-26 | 2022-07-29 | 杭州宏杉科技股份有限公司 | Object access method and device, electronic equipment and machine-readable storage medium |
| CN112492011A (en) * | 2020-11-19 | 2021-03-12 | 苏州浪潮智能科技有限公司 | Distributed storage system fault switching method, system, terminal and storage medium |
| CN113326007B (en) * | 2021-06-30 | 2022-07-29 | 广东电网有限责任公司 | Unstructured data federation storage method, device, terminal and storage medium |
| CN114979137A (en) * | 2022-04-28 | 2022-08-30 | 中国电力科学研究院有限公司 | Method, system, equipment and medium for high-concurrency processing in power industry |
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| US7051115B2 (en) * | 2001-04-19 | 2006-05-23 | Lenovo (Singapore) Pte. Ltd. | Method and apparatus for providing a single system image in a clustered environment |
| CN103905531A (en) * | 2014-03-14 | 2014-07-02 | 浪潮电子信息产业股份有限公司 | Method for converting load balancing among nodes in cluster storage system |
| CN105450774A (en) * | 2015-12-28 | 2016-03-30 | 曙光信息产业(北京)有限公司 | Load balancing method and load balancing device for DNS |
| CN105450775A (en) * | 2015-12-28 | 2016-03-30 | 曙光信息产业(北京)有限公司 | Load balancing method and load balancing device for DNS |
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