CN115933985A - Distributed storage QoS control method and system - Google Patents
Distributed storage QoS control method and system Download PDFInfo
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- CN115933985A CN115933985A CN202211695008.5A CN202211695008A CN115933985A CN 115933985 A CN115933985 A CN 115933985A CN 202211695008 A CN202211695008 A CN 202211695008A CN 115933985 A CN115933985 A CN 115933985A
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Abstract
The invention provides a distributed storage QoS control method and a distributed storage QoS control system. The QoS control method comprises the following steps: setting a speed limit parameter for a target file storage directory through a storage management interface of the distributed storage system, and writing the speed limit parameter into an ECTD cluster; the NAS storage node reads the speed limit parameters and transmits the speed limit parameters to the sharing service module of the corresponding type; and the sharing service module carries out corresponding speed limit processing on the target file storage directory. The QoS control system comprises a processor and a memory, and the processor realizes the QoS control method when executing the computer program stored in the memory. According to the invention, the problems that the existing distributed storage QoS control strategy cannot carry out independent speed limitation on the file storage directory and the system speed limitation fails due to the fact that a single storage node is down easily can be solved.
Description
Technical Field
The invention belongs to the technical field of distributed storage, and particularly relates to a method and a system for controlling QoS (quality of service) of distributed storage.
Background
QoS is an abbreviation of Quality of Service, originates from a network resource competition technology, is used for solving the problem of network blockage or performance bottleneck, solving the problem of preemption of services and resources by clients, better improving the Service Quality, configuring higher network bandwidth or IOPS for high-priority services, meeting the requirements of different Service personnel on the resources, optimizing a resource allocation scheme, preventing users from preempting the resources, and helping managers to better allocate storage resources by QoS so that each application client can fully and smoothly use the back-end storage resources.
The existing distributed storage QoS control strategy is mainly based on an iptables rule, and the QoS control strategy limits the speed of an ip and a transmission bandwidth of a client by adopting hashlimit based on the iptables rule. However, the QoS control policy can only limit the access bandwidth of a specific client, and the speed limit for the file directory cannot be satisfied. In addition, in the process of executing the QoS control policy, if one storage node in the back-end distributed cluster is down, the QoS speed-limiting parameter may be lost, which may result in a speed-limiting failure.
Disclosure of Invention
The invention aims to solve the problems that the existing distributed storage QoS control strategy cannot carry out independent speed limitation on a file storage directory and the system speed limitation is easy to fail due to the fact that a single storage node is down.
In order to achieve the above object, the present invention provides a distributed storage QoS control method and system.
According to a first aspect of the present invention, there is provided a QoS control method for distributed storage, the QoS control method being applied to a distributed storage system, the QoS control method including the steps of:
setting a speed limit parameter for a target file storage directory through a storage management interface of the distributed storage system, and writing the speed limit parameter into an ECTD cluster;
the NAS storage node reads the speed limit parameters and transmits the speed limit parameters to the sharing service module of the corresponding type;
and the sharing service module carries out corresponding speed limit processing on the target file storage directory.
Optionally, the setting, through the storage management interface of the distributed storage system, a speed-limiting parameter for the target file storage directory includes:
and pooling all the disks on the storage server through a storage management interface of the distributed storage system, and creating a file storage directory list containing the target file storage directory based on the formed storage pool.
Optionally, the speed-limiting parameter includes a name of a target file storage directory, a bandwidth speed-limiting value, and a shared service module type, where the bandwidth speed-limiting value is a global bandwidth speed-limiting value or an IP bandwidth speed-limiting value of a specified client, and the shared service module type at least includes one of an NFS shared service module, an FTP shared service module, and an SMB shared service module.
Optionally, the step of the NAS storage node transmitting the speed limit parameter to the corresponding shared service module includes:
acquiring the type of a sharing service module according to the speed limit parameter;
and transmitting the speed limit parameters into configuration files of the sharing service modules of corresponding types.
Optionally, the performing, by the sharing service module, a corresponding speed limit process on the target file storage directory includes:
reading speed limit parameters in a self configuration file;
modifying the native code to implement a predetermined dmClock-based distributed throttling policy;
when receiving an access request of a client to the target file storage directory, carrying out global bandwidth speed limit or specified client IP bandwidth speed limit on the target file storage directory based on the dmClock distributed current limiting strategy, and feeding back a speed limit result to the client.
According to a second aspect of the present invention, there is provided a distributed storage QoS control system comprising a processor and a memory, the processor implementing any one of the above-described distributed storage QoS control methods when executing a computer program stored in the memory.
The invention has the beneficial effects that:
firstly, setting a speed limit parameter for a target file storage directory through a storage management interface of the distributed storage system, and writing the speed limit parameter into an ECTD cluster; secondly, reading the speed limit parameters through an NAS storage node and transmitting the speed limit parameters to a sharing service module of a corresponding type; and finally, carrying out corresponding speed limit processing on the target file storage directory through the sharing service module.
The distributed storage QoS control method not only provides a graphical operation interface to easily complete the setting of the speed limit parameters of the file storage directory, but also realizes the QoS control of common file sharing services through the sharing service module, solves the single point failure problem of the distributed storage nodes under the crash condition based on the ETCD cluster, and does not influence the transmission of the whole speed limit parameters when one storage node in the distributed storage system crashes. Therefore, the distributed storage QoS control method can effectively solve the problems that the existing distributed storage QoS control strategy cannot carry out independent speed limitation on the file storage directory and the system speed limitation fails due to the fact that a single storage node is down easily.
The distributed storage QoS control system and the distributed storage QoS control method of the invention belong to a general inventive concept, and have at least the same beneficial effects as the distributed storage QoS control method, and the beneficial effects are not repeated herein.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
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The invention may be better understood by reference to the following description taken in conjunction with the accompanying drawings, in which like or similar reference numerals identify like or similar parts throughout the figures.
FIG. 1 illustrates a flow chart of an implementation of a distributed storage QoS control method according to an embodiment of the present invention;
FIG. 2 shows a flow chart of an implementation of setting speed limit parameters and writing the speed limit parameters to an ETCD cluster through an interface according to an embodiment of the invention;
FIG. 3 illustrates an implementation flow diagram of a NAS storage node reading a speed-limiting parameter and transmitting into a shared services module according to an embodiment of the invention;
fig. 4 shows a flow chart of an implementation of the shared services module processing the speed limit and feeding back to the client according to an embodiment of the invention.
Detailed Description
In order that those skilled in the art can more fully understand the technical solutions of the present invention, exemplary embodiments of the present invention will be described more fully and in detail below with reference to the accompanying drawings. Obviously, the one or more embodiments of the present invention described below are only one or more of specific ways to implement the technical solutions of the present invention, and are not exhaustive. It should be understood that the technical solutions of the present invention can be implemented in other ways belonging to one general inventive concept, and should not be limited by the exemplary described embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step on the basis of one or more embodiments of the present invention, shall fall within the scope of protection of the present invention.
Example (b): the traditional file storage speed limiting method only can limit the access bandwidth of a client and cannot limit the speed of a plurality of file directories individually, although NAS storage provides a speed limiting method for block storage, no QoS solution supporting a plurality of sharing modules is provided in the file storage aspect, the traditional QoS is combined with distributed storage, and when one of storage nodes in a back-end distributed cluster is down, qoS speed limiting parameters are lost, so that the speed limitation fails.
In order to solve the above problems, the embodiment of the present invention provides a distributed storage QoS control method, and the embodiment of the present invention completes speed limit on a file storage directory by using a cluster multi-active technology and using a dmClock algorithm through a storage server. The client reads and writes the storage resources through NFS, ISCSI, CIFS and FTP protocols, the distributed file storage system is generally used after being mounted through the client, one distributed file storage system can serve a plurality of clients, user services are distributed in each client, qoS control cannot be carried out on the client, an ETCD cluster is adopted at a distributed storage server end to control reading of QoS parameters, and speed limit of file storage directories is processed according to corresponding relations between NAS file directories and shared service modules.
Fig. 1 shows a flowchart of an implementation of a distributed storage QoS control method according to an embodiment of the present invention. Referring to fig. 1, the distributed storage QoS control method according to the embodiment of the present invention is applied to a distributed storage system, and specifically includes the following steps:
s100, setting a speed limit parameter for a target file storage directory through a storage management interface of the distributed storage system, and writing the speed limit parameter into an ECTD cluster;
step S200, the NAS storage node reads the speed limit parameter and transmits the speed limit parameter to a sharing service module of a corresponding type;
step S300, the sharing service module carries out corresponding speed limit processing on the target file storage directory.
In step S100, the speed limit parameter includes a name of a target file storage directory, a bandwidth speed limit value, and a shared service module type, where the bandwidth speed limit value is a global bandwidth speed limit value or an IP bandwidth speed limit value of a specified client, and the shared service module type at least includes one of an NFS shared service module, an FTP shared service module, and an SMB shared service module.
In the embodiment of the invention, the speed limit parameter setting and speed limit processing of the file storage directories of the NAS distributed storage system can be completed through the steps S100-S300, the speed limit of the file storage directories aims to prevent the performance of other file storage directories from being affected due to the fact that a single file storage directory occupies too many resources, the problem of resource preemption is solved through the speed limit, resources are reasonably distributed, the requirements of different levels of services are met, and better service quality is provided for application and use of the storage system in a specific storage field.
The embodiment of the invention sets different speed-limiting parameters for different NAS file storage directories through a storage management interface, wherein the speed-limiting parameters comprise global speed limiting and client IP-based speed limiting, then the speed-limiting parameters are stored in an ETCD cluster, the speed-limiting parameters are read through NAS storage nodes and are transmitted into a shared service module corresponding to an NAS distributed storage system, the shared service module receives an access request of a client according to a C library provided by librados, and the mapping relation between a file storage directory in a newly-added configuration file and read-write bandwidth is read and stored in a token pool of a hanging point by modifying respective source codes; the method comprises the steps of limiting the number of data packets processed by NFS Ganesha, miniFTP and SMB sharing service modules per second, allowing the data packets to pass when the total number of the data packets is smaller than the number of tokens in a token pool, and limiting the speed of the data packets when the total number of the data packets is larger than the number of tokens in the token pool, and prohibiting data transmission to supplement the number of tokens after waiting for a period of time, so that the limitation of the read-write bandwidth of the NAS storage subdirectory file is realized.
Further, fig. 2 shows a flow chart of an implementation of setting a speed limit parameter through an interface and writing the speed limit parameter into an etc cluster according to an embodiment of the present invention. Referring to fig. 2, in the embodiment of the present invention, step S100 includes:
step S101, all the disks on the storage server are pooled through a storage management interface of the distributed storage system, and a file storage directory list containing the target file storage directory is created based on the formed storage pool.
Step S102, setting global bandwidth or appointing client IP speed limit for a target file storage directory;
and S103, writing the speed limit parameters into the ETCD cluster.
The embodiment of the invention supports two speed limit modes of setting the global speed limit of the specific file storage directory and the client side speed limit mainly based on the client side IP. Pooling all disks on a storage server through a storage management interface of a distributed storage system, creating a file storage directory list based on a storage pool, and selecting a specific file storage directory to set QoS speed limit. The interface can be filled with a bandwidth limit value, or can be selected to specify a client speed limit, fill in an IP address of the client, fill in a plurality of IP addresses, and limit the speed according to a specified specific IP address.
Still further, fig. 3 shows a flow chart of implementing the NAS storage node to read the speed-limiting parameter and transmit the speed-limiting parameter to the shared service module according to the embodiment of the present invention. Referring to fig. 3, in the embodiment of the present invention, step S200 includes:
step S201, reading an ETCD cluster speed limit parameter by the NAS storage node;
step S202, transmitting the configuration file into a configuration file of an NFS shared service module, an FTP shared service module and/or an SMB shared service module according to the type of the shared service module.
In the embodiment of the invention, the storage cluster needs to consider the problem of high availability in practical application, the continuity of the whole service is not influenced by closing one storage server in the storage cluster, and if the speed limit parameter corresponding to the file storage directory is set in one storage node, the failure of the QoS of the file storage directory may be caused after the storage node goes down. In order to solve the problem, the embodiment of the invention is realized by adopting an ETCD cluster mode, an ETCD database cluster is configured, and when only one storage node in the cluster works, the setting of the speed limit of the file storage directory is not influenced. And reading the speed-limiting parameters by the NAS storage node, finishing the value taking of the ETCD database through jetcd-core.
In a storage system, a bottom-layer storage Bluestore interface can be used for limiting the speed of OSD file storage, and the method mainly comprises two steps, firstly, a speed limiting algorithm such as dmclock is designed, and a code interface is successfully added into a Bluestore transaction processing interface Do _ TRANSACTIONS function and a DEAL _ WITH _ TRANSACTIONS function; another is to set parameters in the token bucket algorithm (depth of bucket, speed of token generation, etc.) to limit the transmission speed. However, in the embodiment of the invention, the corresponding relation between the ETCD cluster speed limit and the catalogue is firstly stored in the configuration file of each shared service module, and then the code of the shared service module is modified to limit the transmission speed, so that the speed can be limited aiming at different shared services. And transmitting an interface function public String qoConfig (int switch, string dirName, string [ ] IPS, string band with, string type) to indicate whether to limit NFS, FTP, SMB modules, directory names of speed limit, client IP addresses, bandwidth and types of sharing service modules, and writing the corresponding relation between file directories and speed limit parameters into configuration files corresponding to the respective modules through the qoConfig speed limit interface function.
Still further, fig. 4 shows an implementation flowchart of the shared service module processing the speed limit and feeding back to the client according to the embodiment of the present invention. Referring to fig. 4, in the embodiment of the present invention, step S300 includes:
step S301, the sharing service module reads the speed limit parameters in the configuration file;
and step S302, the NFS, FTP and SMB sharing service module processes the speed limit and feeds the speed limit result back to the client.
In the embodiment of the invention, a sharing service module reads a speed limit parameter in a self configuration file; modifying native code to implement a predetermined dmClock-based distributed current limiting policy; when receiving an access request of a client to the target file storage directory, performing global bandwidth speed limit or specified client IP bandwidth speed limit on the target file storage directory based on the dmClock distributed current-limiting strategy, and feeding back a speed limit result to the client.
In the embodiment of the invention, a sharing service module program stores user data into a reliable distributed storage cluster through libcepfs, a file system library ((libcepfs) runs on a RADS library (librados), and the purpose of limiting speed is realized by modifying a source code of a third-party open source sharing service program.
The FTP sharing service module processing speed limit interface comprises a reading speed limit parameter interface get _ limit _ by _ ip (session _ t _ sess), mainly used for obtaining the speed limit parameter of the file directory obtained from the config file corresponding to the export module, and then processing the speed limit value through get _ limit _ by _ ip (session _ t _ sess).
Each sharing service module limits the speed by modifying the source code and then sends the source code to a Request for processing, so that the purpose of limiting the speed of the file storage directory is achieved, the problems of network delay, blocking and the like are solved, better service capability is provided for realizing the speed limitation of the appointed file storage directory, and the mapping relation between the file directory and the read-write bandwidth in the newly added configuration file is read and stored in a token pool of a mounting point by modifying the source code of the sharing service module; the total size of the data packets processed by the sharing service module per second is limited to be smaller than the number of tokens in the token pool, so that the read-write bandwidth limitation of the file storage subdirectory level is realized, and the situation that a single subdirectory occupies too many resources and affects the performance of other subdirectories is prevented.
The client communicates with the server of the storage system through a Socket network communication mechanism, when the server limits the total rate of sending or receiving all messages on a storage interface, the messages are classified and redistributed according to strategies, data packets are set to different flow levels, a directory without set speed limit or the client preferentially uses storage resources, and the phenomenon of data packet loss or transmission failure caused by network congestion is avoided, so that the data packets with higher priority can preferentially pass through a file storage gateway under the condition of network congestion, and the purpose of limiting the speed of the storage resources used by the client is achieved.
The distributed storage QoS control method of the embodiment of the invention sets the bandwidth of a file storage directory through a Web interface or fills in a client IP, stores the speed limit parameters to an ETCD cluster, reads the speed limit parameters of the ETCD cluster through NFS, samba and FTP sharing service modules, modifies the source codes of respective sharing modules by using the idea of dmClock token bucket, and controls the total size of data packets processed per second to be smaller than the number of tokens in a token pool, thereby realizing the read-write bandwidth limitation of NAS storage file directory level, preventing a single subdirectory from occupying too many resources, avoiding the problem of storage resource tension caused by client access, ensuring the quality of key service, improving the safety and reliability of IO access bandwidth, and more reasonably distributing the limited resources.
The QoS control method for the distributed storage QoS of the embodiment of the invention also controls the QoS of three common file sharing services of NFS, SMB and FTP through the sharing service module, and adopts the ETCD cluster to ensure that the distributed storage nodes fail in a single point under the crash condition, the transmission speed of the client accessing the storage resources exceeds the set bandwidth by using the idea of the dmClock token bucket, the client is limited to transmit in the set bandwidth, the global bandwidth can be set according to a specific file directory during setting of the speed limit parameters, the bandwidth of different client accesses can also be limited, the QoS parameters are stored in the ETCD cluster database, and the transmission of the whole speed limit parameters is not influenced when one distributed storage system crashes. The embodiment of the invention can solve the competition of the client for the access of the storage resources, can also provide higher service quality for the high-priority service, solves the problem that the storage client cannot limit the speed, can help an administrator to better distribute the storage performance resources, ensures that each application client fully and stably uses the rear-end storage performance, and ensures that the user service is not influenced.
Correspondingly, on the basis of the distributed storage QoS control method provided by the embodiment of the invention, the embodiment of the invention also provides a distributed storage QoS control system, the QoS control system comprises a processor and a memory, and the processor realizes the distributed storage QoS control method provided by the embodiment of the invention when executing the computer program stored in the memory
Although one or more embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that the present invention can be embodied in any other forms without departing from the spirit or scope thereof. Accordingly, the above-described embodiments are intended to be illustrative, not limiting, and many modifications and alterations may be apparent to those of ordinary skill in the art without departing from the spirit and scope of the invention, as defined by the following claims.
Claims (6)
1. A distributed storage QoS control method is applied to a distributed storage system, and is characterized in that the distributed storage QoS control method comprises the following steps:
setting a speed limit parameter for a target file storage directory through a storage management interface of the distributed storage system, and writing the speed limit parameter into an ECTD cluster;
the NAS storage node reads the speed limit parameters and transmits the speed limit parameters to the sharing service module of the corresponding type;
and the sharing service module carries out corresponding speed limit processing on the target file storage directory.
2. The method of claim 1, wherein the setting of the speed-limiting parameter for the target file storage directory through the storage management interface of the distributed storage system comprises:
and pooling all the disks on the storage server through a storage management interface of the distributed storage system, and creating a file storage directory list containing the target file storage directory based on the formed storage pool.
3. The distributed storage QoS control method according to claim 1, wherein the speed limit parameter includes a name of a target file storage directory, a bandwidth speed limit value and a shared service module type, the bandwidth speed limit value is a global bandwidth speed limit value or a specified client IP bandwidth speed limit value, and the shared service module type at least includes one of an NFS shared service module, an FTP shared service module and an SMB shared service module.
4. The distributed storage QoS control method according to claim 3, wherein the step of transmitting the speed limit parameter to the corresponding shared service module by the NAS storage node comprises the following steps:
acquiring the type of a sharing service module according to the speed limit parameter;
and transmitting the speed limit parameters into configuration files of the sharing service modules of corresponding types.
5. The method of claim 4, wherein the performing, by the shared service module, the corresponding rate-limiting processing on the target file storage directory comprises:
reading speed limit parameters in a self configuration file;
modifying native code to implement a predetermined dmClock-based distributed current limiting policy;
when receiving an access request of a client to the target file storage directory, carrying out global bandwidth speed limit or specified client IP bandwidth speed limit on the target file storage directory based on the dmClock distributed current limiting strategy, and feeding back a speed limit result to the client.
6. A distributed storage QoS control system comprising a processor and a memory, the processor implementing the distributed storage QoS control method of any one of claims 1 to 5 when executing a computer program stored in the memory.
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| CN116185965A (en) * | 2023-05-04 | 2023-05-30 | 联想凌拓科技有限公司 | Method, apparatus, device and medium for quality of service control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116185965A (en) * | 2023-05-04 | 2023-05-30 | 联想凌拓科技有限公司 | Method, apparatus, device and medium for quality of service control |
| CN116185965B (en) * | 2023-05-04 | 2023-08-04 | 联想凌拓科技有限公司 | Method, apparatus, device and medium for quality of service control |
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