CN115098028A - Path device selection method, device, equipment and medium for multi-path storage - Google Patents

Path device selection method, device, equipment and medium for multi-path storage Download PDF

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CN115098028A
CN115098028A CN202210753296.9A CN202210753296A CN115098028A CN 115098028 A CN115098028 A CN 115098028A CN 202210753296 A CN202210753296 A CN 202210753296A CN 115098028 A CN115098028 A CN 115098028A
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CN115098028B (en
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张振广
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Suzhou Inspur Intelligent Technology Co Ltd
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Abstract

The application discloses a method, a device, equipment and a medium for selecting path equipment of multi-path storage, which relate to the field of data storage, and the method is applied to a server and comprises the following steps: sending the received IO request to each path device corresponding to the target multi-path device according to a preset polling mode, so that each path device writes IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multi-path device; monitoring the processing process of each path device on each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time in real time to generate real-time statistical data; when the preset path equipment switching condition is met, determining target path equipment based on the real-time statistical data, and sending the current IO request to be distributed to the target path equipment, so that the target path equipment writes IO data corresponding to the IO request to be distributed into a target volume. The invention can intelligently select the path equipment, reduce the waiting time of the IO request and improve the IO processing capability.

Description

Path device selection method, device, equipment and medium for multi-path storage
Technical Field
The present invention relates to the field of data storage, and in particular, to a method, an apparatus, a device, and a medium for selecting a path device for multi-path storage.
Background
In an SAN (Storage Area Network) environment composed of optical fibers or an IPSAN environment composed of iSCSI (Internet Small Computer System Interface), a many-to-many relationship is formed as the host and the Storage are connected by an optical fiber switch or a plurality of Network cards and IP (Internet Protocol), and a multipath relationship from the host to the Storage is correspondingly formed. In the multi-path application, a path selection policy of multi-path software refers to a method for selecting a target device from a plurality of devices when an I/O (Input/Output) operation occurs on a host side, and there are three types of path selection policies: 1) round robin: polling and sending IO on all effective path equipment in the optimal path group, and polling and sending IO on effective path equipment in a non-optimal path group if no available path equipment exists in the optimal path group; 2) clear queue depth: preferentially sending the I/O to the path equipment with the least current uncompleted I/O request on the optimal path group; 3) service-time: and sending the I/O to the path with the shortest service time. However, all the three path device selection strategies have corresponding disadvantages, and only one of the schemes can be mechanically executed in the actual operation process, and the execution tasks of each path device cannot be automatically and intelligently distributed and adjusted in real time.
Therefore, in the multipath application process of data storage, how to avoid the situation that task distribution of each path device is inflexible and unintelligent due to the inherent path device selection method is a problem to be solved in the field.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a method, an apparatus, a device and a medium for selecting path devices in multi-path storage, which can flexibly and intelligently distribute tasks to each path device while considering the performance, processing capability and service duration of each path device. The specific scheme is as follows:
in a first aspect, the present application discloses a method for selecting a path device for multi-path storage, which is applied to a server and includes:
the first request sending module is used for sending the received IO request to each path device corresponding to a target multi-path device according to a preset polling mode, so that the IO data corresponding to the IO request are written into a target volume in a storage system corresponding to the target multi-path device by each path device;
the data recording module is used for monitoring the processing process of each path device on each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time in real time to generate real-time statistical data;
and the second request sending module is used for determining target path equipment based on the real-time statistical data when a preset path equipment switching condition is met, and sending the current IO request to be distributed to the target path equipment so that the target path equipment can write the IO data corresponding to the IO request to be distributed into the target volume.
Optionally, before sending the received IO request to each path device corresponding to the target multipath device according to a preset polling manner, the method further includes:
establishing a path link between the server and a preset storage system by using the identification information of the server and a preset path link type; the preset storage system comprises a host computer with identification information of the server and a volume, and the volume is mapped to the host computer in advance;
and determining each path device based on the path link, and aggregating the path devices with the same WWID into one target multi-path device.
Optionally, when a preset path device switching condition is met, determining a target path device based on the real-time statistical data includes:
when the IO frequency of the data in the target volume meets a preset frequency, determining target path equipment based on the real-time statistical data;
or when the writing capacity of each path device meets a preset capacity value, determining a target path device based on the real-time statistical data.
Optionally, the sending the received IO request to each path device corresponding to the target multipath device according to a preset polling manner includes:
and sending the received IO request to each path device corresponding to the target multi-path device based on round-robin algorithm.
Optionally, the recording the number of IO processing times of each path device in real time and the processing time consumption of each IO in real time to generate real-time statistical data includes:
determining and recording IO processing times of each path device and each IO processing time consumption in real time, and determining the IO average time consumption of each path device by using the IO processing times of each path device and each IO processing time consumption;
and generating real-time statistical data based on the IO processing times of each path device, the IO processing time consumption of each time and the IO average time consumption.
Optionally, the determining a target path device based on the real-time statistical data includes:
determining the number of unprocessed IOs of each path device, and determining the estimated waiting time length based on the average IO consumption time and the number of unprocessed IOs of each path device in the real-time statistical data;
and determining the path equipment with the shortest estimated waiting time in all path equipment corresponding to the target multi-path equipment as target path equipment.
Optionally, after sending the current IO request to be distributed to the target path device so that the target path device writes the IO data corresponding to the IO request to be distributed in the target volume, the method further includes:
calculating the total IO flow of each path device in real time by using a preset flow calculation formula;
and sending the total IO flow to a preset multipath tool in a server to display in the preset multipath tool based on a preset display format.
In a second aspect, the present application discloses a path device selection apparatus for multipath storage, including:
the first request sending module is used for sending the received IO request to each path device corresponding to a target multi-path device according to a preset polling mode so that each path device can write the IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multi-path device;
the data recording module is used for monitoring the processing process of each path device on each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time in real time to generate real-time statistical data;
and the second request sending module is used for determining target path equipment based on the real-time statistical data when a preset path equipment switching condition is met, and sending the current IO request to be distributed to the target path equipment so that the target path equipment can write the IO data corresponding to the IO request to be distributed into the target volume.
In a third aspect, the present application discloses an electronic device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the foregoing path device selection method for multi-path storage.
In a fourth aspect, the present application discloses a computer storage medium for storing a computer program; wherein the computer program when executed by a processor implements the steps of the previously disclosed multipath stored path device selection method.
In the method, a server sends a received IO request to each path device corresponding to a target multi-path device according to a preset polling mode, so that the IO data corresponding to the IO request are written into a target volume in a storage system corresponding to the target multi-path device by each path device; monitoring the processing process of each path device on each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time in real time to generate real-time statistical data; when the preset path equipment switching condition is met, determining target path equipment based on the real-time statistical data, and sending the current IO request to be distributed to the target path equipment, so that the target path equipment writes IO data corresponding to the IO request to be distributed into the target volume. Therefore, the method provided by the invention considers the execution capacity and execution time of each path device, distributes the received IO request in stages according to different path selection algorithms, and distributes the IO request according to the specific execution capacity of each path device, so that the overall IO processing efficiency of each path device is greatly improved, the method can utilize the preset path device switching conditions to carry out real-time control and accurate control on the IO data processing condition, and the intelligent selection of data storage is improved. In addition, the invention can record the total flow of each path device in real time, count the total flow processed by each path device, and visually display the total flow to the preset multipath tool in the server, thereby expanding the functions of the multipath tool and improving the practicability and the rationality of the invention.
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 flowchart of a path device selection method for multi-path storage according to the present application;
fig. 2 is a flowchart of a specific multipath stored path device selection method provided in the present application;
fig. 3 is a schematic structural diagram of a path device selection apparatus for multi-path storage according to the present application;
fig. 4 is a block diagram of an electronic device provided in the present application.
Detailed Description
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.
In the prior art, only the method of performing polling distribution on the path equipment, or distributing the path equipment with the minimum number of tasks, or distributing the path equipment with the minimum service time can be selected, so that the task distribution of each path equipment is inflexible and not intelligent. In the application, the performance, the processing capacity and the service duration of each path device are considered simultaneously, flexible and intelligent task distribution is carried out on each path device, and the execution efficiency of data IO is greatly improved.
The embodiment of the invention discloses a method for selecting path equipment for multi-path storage, which is applied to a server and comprises the following steps of:
step S11: and sending the received IO request to each path device corresponding to a target multi-path device according to a preset polling mode, so that each path device can write the IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multi-path device.
In this embodiment, the path device is a path device corresponding to each link after the storage system and the server establish a path link, and the multi-path device is a device obtained by aggregating each path device.
It is noted that there are also different multipath grouping strategies in the prior art, which refer to the grouping method of the path devices (sdX) under the multipath device (dm-X). The method of the present invention is limited to a multibus policy among multi-path grouping policies, i.e., all path devices are grouped in the same path group.
In this embodiment, the sending the received IO request to each path device corresponding to the target multipath device according to a preset polling manner may include: and sending the received IO request to each path device corresponding to the target multi-path device based on a round-robin algorithm.
In this embodiment, before sending the received IO request to each path device corresponding to the target multipath device according to the preset polling manner, the method may further include: establishing a path link between the server and a preset storage system by using the identification information of the server and a preset path link type; the preset storage system comprises a host and a volume with identification information of the server, and the volume is mapped to the host in advance; and determining each path device based on the path link, and aggregating the path devices with the same WWID (World Wide Identification) into a target multi-path device.
In some specific embodiments, a host and a volume corresponding to a server may be created in a storage system in advance, and the volume may be mapped to the host, and specifically, when a preset command is obtained or a creation instruction of the host and the volume is obtained in a preset visual interface, the host and the volume may be created based on the creation instruction. It should be noted that the host created in this step is a concept on the storage System, and when the preset path link type is an iSCSI link, the created host must include IQN (i.e., iSCSI (Internet Small Computer System interface) Qualified Name of the current server) information; when the preset path link type is FC (i.e. Fiber Channel) link, the created host must contain WWPN (i.e. World Wide Port Name) information of the current server.
After the storage system is operated, the server may create a link between the server and the storage system through a link establishment command input by a user, where the created link is generally multiple. When a link is created, a user can firstly discover a target on storage by using iscsiadm-m discovery-t sendsearch-p $ { storage _ IP }, $ { storage _ PORT } command, wherein $ { storage _ IP } is a management IP in a storage system cluster, and in a specific implementation mode, 100.7.46.45 can be set; the $ { storage _ PORT } is a host PORT corresponding to the management IP, and in a specific implementation, may be set to 3260, and the command input by the user may be, after merging: iscsiadm-mdiscovery-t sendtargets-p 100.7.46.45: 3260.
Then, the user can log in a node in the storage system through iscsiadm-m node-T $ { storage _ IQN } -p $ { storage _ IP } -login command to establish a link, wherein $ { storage _ IQN } is the current IQN information of the server.
Finally, the user can view the established link between the server and the storage system through the iscsiadm-m session command.
After the links are established, each path device corresponding to each storage link can be generated based on each storage link, and a user can scan through echo '- -' >/sys/class/scsi _ host/$ { hostName }/device/scsi _ host/$ { hostName }/scan, and at this time, the path device can be found in a directory/dev/disk/by-path/path. For example: if there are four established links, then each volume corresponds to four path devices, for example: ,/dev/sdb,/dev/sdc,/dev/sdd, and/dev/sde.
The server will then aggregate devices with the same WWID into one target multipath device. Specifically, in the process of aggregating path devices, multipath software may be started using a system start multipath, which automatically aggregates devices with the same wwid into one multipath device, for example: if/dev/sdb,/dev/sdc,/dev/sdd and/dev/sde have the same WWID, the four devices are aggregated to be the target multipath device of/dev/dm-0, and at this time, the corresponding relationship between the multipath device and the path device as shown in table 1 below is formed.
TABLE 1
Figure BDA0003721723410000071
In this embodiment, when an IO request is received, the received IO request is first sent to each path device corresponding to a target multipath device according to a preset polling manner. In a specific embodiment, the user can write data to/dev/dm-0 by commanding dd if/dev/zero of ═ dev/dm-0bs ═ 1k count ═ 10000, and 1k of data is written each time, and 10000 times are written. When the server obtains the IO requests, the server writes data to/dev/dm-0 based on the command, firstly, the server polls and selects path equipment by using a preset round-robin polling algorithm, and each path equipment writes corresponding IO data into a target volume in a storage system corresponding to the multipath equipment based on the IO request received by the path equipment. In a specific embodiment, when the data write command is received, the target multipath device is determined to be/dev/dm 0, and an IO request poll is sent to the target path devices/dev/sdb,/dev/scdc,/dev/sdd and/dev/sde, where each target path device writes corresponding IO data into a target volume corresponding to/dev/dm 0.
Step S12: and monitoring the processing process of each path device to each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time to generate real-time statistical data.
In this embodiment, the processing process of each path device on each IO request may be monitored, and real-time data may be recorded, specifically, the number of I/O processed on the path device corresponding to each path link (that is, the number of IO processing times) and the processing time consumption may be monitored, and if each path device executes 10I/O requests, the following table 2 shows the time consumption and the average time consumption of each request.
TABLE 2
Figure BDA0003721723410000081
In this embodiment, the average time consumption may be calculated by a formula
Figure BDA0003721723410000082
And calculating, wherein i represents the ith path device, and k represents the kth sample.
In some specific embodiments, when the number of the path devices is 4, the value of i ranges from 1 to 4. In addition, when the number of samples is 10 as shown in Table 2, the number of samples k ranges from 1 to 10.
Step S13: when a preset path device switching condition is met, determining target path devices based on the real-time statistical data, and sending the current IO request to be distributed to the target path devices, so that the target path devices write IO data corresponding to the IO request to be distributed into the target volume.
And when the preset path equipment switching condition is met, stopping polling and sending the IO request, determining target path equipment based on the real-time statistical data, and then sending the IO request to be distributed to the target path equipment.
In this embodiment, when the preset path device switching condition is satisfied, determining the target path device based on the real-time statistical data may include: when the IO times of the data in the target volume meet the preset times, determining target path equipment based on the real-time statistical data; or when the writing capacity of each path device meets a preset capacity value, determining a target path device based on the real-time statistical data. It can be understood that, in this embodiment, the preset path device switching condition may be set to that when the number of IO times of the data in the target volume meets a preset number of times or when the write capacity of each path device meets a preset capacity value, the preset number of times and the preset capacity value may be set according to different scenarios and may be changed at any time. In some specific embodiments, when the preset path device switching condition is set to be that when each path device writes 1G data, in actual operation, the capacity of the data written by each path device is recorded, and when the writing capacity of each path device is greater than 1G, polling sending of an IO request is stopped, a target path device is determined, and then the IO request to be currently distributed is sent to the target path device.
In this embodiment, when the preset path device switching condition is met, the IO request to be currently distributed is automatically distributed to the target path device meeting the preset condition, a method for mechanically distributing the IO request in a traditional path device selection method is abandoned, and the efficiency of IO execution is improved.
In this embodiment, after sending the current IO request to be distributed to the target path device so that the target path device writes IO data corresponding to the IO request to be distributed in the target volume, the method may further include: calculating the total IO flow of each path device in real time by using a preset flow calculation formula; and sending the total IO flow to a preset multipath tool in a server to display in the preset multipath tool based on a preset display format.
Specifically, the step can be represented by a formula
Figure BDA0003721723410000091
And calculating the IO flow on each path device in real time. Wherein i represents the ith path device, k represents the kth IO, f i [k] Representing the flow of the kth I/O on the ith path device. F i Indicating the total flow on the ith path device.
It can be understood that in this embodiment, when each path device receives an IO request and executes a corresponding data reading or writing operation, it records an IO traffic in real time, and counts a total IO traffic of each path device, in some specific embodiments, the total IO traffic may be sent to a multi path tool in a server and displayed in a preset display format according to a preset display format, in a specific implementation process, the preset display format includes, but is not limited to, a table, a polyline statistical graph, a text, and the like, which is not limited herein. In some other embodiments, the total IO flow may also be directly displayed in a preset window interface in the server based on a preset display format without connecting a preset multipath tool.
In this embodiment, a server first sends a received IO request to each path device corresponding to a target multi-path device according to a preset polling manner, so that each path device writes IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multi-path device; monitoring the processing process of each path device on each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time to generate real-time statistical data; when a preset path device switching condition is met, determining target path devices based on the real-time statistical data, and sending the current IO request to be distributed to the target path devices, so that the target path devices write IO data corresponding to the IO request to be distributed into the target volume. Therefore, the method considers the execution capacity and execution time of each path device, distributes the received IO request in stages according to different path selection algorithms, and distributes the IO request according to the specific execution capacity of each path device, greatly improves the overall IO processing efficiency of each path device, provides the method for carrying out real-time control and accurate control on the IO data processing condition by using the preset path device switching condition, and improves the intelligent selection of data storage. In addition, the invention can record the total flow of each path device in real time, count the total flow processed by each path device, and visually display the total flow to the preset multipath tool in the server, thereby expanding the functions of the multipath tool and improving the practicability and the rationality of the invention.
Fig. 2 is a flowchart of a specific path device selection method for multi-path storage according to an embodiment of the present disclosure. Referring to fig. 2, the method includes:
step S21: and sending the received IO request to each path device corresponding to a target multi-path device based on a round-robin algorithm, so that each path device can write the IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multi-path device.
It can be understood that, in this embodiment, the round-robin algorithm may be used to complete the polling transmission operation for the IO request.
Step S22: monitoring the processing process of each path device to each IO request, determining and recording the IO processing times of each path device and the IO processing time consumption of each time in real time, and determining the IO average time consumption of each path device by using the IO processing times of each path device and the IO processing time consumption of each time.
For a more specific processing procedure of step S22, reference may be made to corresponding contents disclosed in the foregoing embodiments, and details are not repeated here.
Step S23: and generating real-time statistical data based on the IO processing times of the path devices, the IO processing time consumption of each time and the IO average time consumption.
In this embodiment, the number of completed I/os, the elapsed time, and the average elapsed time on the path device may be updated in real time, and real-time statistical data may be generated.
Step S24: determining the unprocessed IO quantity of each path device, and determining the estimated waiting time length based on the IO average consumed time and the unprocessed IO quantity of each path device in the real-time statistical data.
In this embodiment, the number of uncompleted I/os on the path device may also be counted in real time. And when a new I/O operation is triggered, estimating a waiting time according to the average consumed time and the number of uncompleted I/O operations, and finally selecting target path equipment according to the waiting time. As shown in table 3 below, an average consumed time of each path device and the IO request corresponding to each path device, and a number of uncompleted IO operations are shown as an indication table,
TABLE 3
Path device Average time (milliseconds) of I/O requests I/O operations not yet completed
/dev/sdb 11 10
/dev/sdc 15 9
/dev/sdd 11.1 11
/dev/sde 26.1 12
In some embodiments, the expression may be by formula
Figure BDA0003721723410000111
Calculating the estimated waiting time of each path device, wherein,
Figure BDA0003721723410000112
average elapsed time for ith path device, C i The number of I/O uncompleted on the ith path device. For example, the estimated wait time of/dev/sdb in the table above is T 1 Estimated wait duration T of 11 x 10 ═ 110,/dev/sdc 2 The estimated waiting time T of/dev/sdd was calculated in the same manner as for 15 × 9 ═ 135 3 Estimated wait time T of 122.1,/dev/sde 4 It was 313.2.
In addition, it should be noted that in this embodiment, the number of processed IOs, the number of unprocessed IOs, and the average consumed time of each path device are recorded in real time. When the ith path equipment completes one I/O, updating the number C of uncompleted I/O i I.e. C i ＝C i -1; when the ith path equipment completes one I/O, updating the number N of the completed I/O, namely N is equal to N + 1; updating average elapsed time when an I/O is completed on the ith path device
Figure BDA0003721723410000113
Namely, it is
Figure BDA0003721723410000114
Updating the number C of unfinished I/O when distributing a new I/O on the ith path device i I.e. C i ＝C i +1。
Step S25: and determining the path equipment with the shortest estimated waiting time in all path equipment corresponding to the target multi-path equipment as target path equipment.
In this embodiment, the path device with the shortest estimated waiting time is determined as the target path device. Taking the data in Table 3 as an example, the estimated waiting time of/dev/sdb is T 1 When the minimum value is 11 × 10 — 110, the target path device is determined as/dev/sdb.
Step S26: and sending the current IO request to be distributed to the target path equipment so that the target path equipment can write the IO data corresponding to the IO request to be distributed into the target volume.
In this embodiment, when a new IO operation is triggered, that is, when an IO request to be distributed is received, the IO request to be distributed is preferentially sent to a device with the shortest estimated waiting time, that is, to the/dev/sdb.
In the prior art, round-robin selects path equipment in a polling mode and does not consider the performance and the processing capacity of the path equipment. queue depth does not take into account the time consumed by the path device to process one I/O, although it takes into account the number of I/Os on the path device that have not yet completed. Although the service time considers the time consumption of one I/O, the service time only considers the latest I/O, does not consider the time consumption of all I/Os in a time range, and does not consider the number of I/Os which are not completed on the path equipment. The method for selecting the path equipment with the multi-path storage, provided by the embodiment, can select different path selection algorithms in two stages, poll and send the OA request in the first stage, determine the average consumed time and the number of uncompleted routes of the I/O on the path equipment according to the statistical data recorded in real time in the first stage when the preset path equipment switching condition is met, calculate the waiting time of each path equipment, and intelligently select the path equipment according to the waiting time in the second stage, so that the waiting time of the I/O request is reduced, and the processing capacity is improved.
Referring to fig. 3, an embodiment of the present application discloses a path device selection apparatus for multi-path storage, which is applied to a server, and specifically may include:
a first request sending module 11, configured to send a received IO request to each path device corresponding to a target multipath device according to a preset polling manner, so that each path device writes IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multipath device;
the data recording module 12 is configured to monitor a processing process of each path device on each IO request, and record the IO processing times of each path device and the time consumed for each IO processing in real time to generate real-time statistical data;
and a second request sending module 13, configured to determine, when a preset path device switching condition is met, a target path device based on the real-time statistical data, and send the current IO request to be distributed to the target path device, so that the target path device writes IO data corresponding to the IO request to be distributed in the target volume.
According to the method, a server firstly sends a received IO request to each path device corresponding to a target multi-path device according to a preset polling mode, so that each path device writes IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multi-path device; monitoring the processing process of each path device on each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time to generate real-time statistical data; when a preset path device switching condition is met, determining target path devices based on the real-time statistical data, and sending the current IO request to be distributed to the target path devices, so that the target path devices write IO data corresponding to the IO request to be distributed into the target volume. Therefore, the method considers the execution capacity and execution time of each path device, distributes the received IO request in stages according to different path selection algorithms, and distributes the IO request according to the specific execution capacity of each path device, greatly improves the overall IO processing efficiency of each path device, provides the method for carrying out real-time control and accurate control on the IO data processing condition by using the preset path device switching condition, and improves the intelligent selection of data storage. In addition, the invention can record the total flow of each path device in real time, count the total flow processed by each path device, and visually display the total flow to the preset multipath tool in the server, thereby expanding the functions of the multipath tool and improving the practicability and the rationality of the invention.
In some embodiments, the apparatus for selecting a path device for multi-path storage further includes:
a link creating unit, configured to create a path link between the server and a preset storage system by using the identification information of the server and a preset path link type; the preset storage system comprises a host and a volume with identification information of the server, and the volume is mapped to the host in advance;
and the equipment aggregation unit is used for determining each path equipment based on the path link and aggregating the path equipment with the same WWID into a target multi-path equipment.
In some specific embodiments, the second request sending module 13 specifically includes:
the first device determining unit is used for determining target path devices based on the real-time statistical data when the number of IO times of the data in the target volume meets a preset number;
or, the second device determining unit is configured to determine a target path device based on the real-time statistical data when the write capacity of each of the path devices satisfies a preset capacity value.
In some specific embodiments, the first request sending module 11 includes:
and the request sending unit is used for sending the received IO request to each path device corresponding to the target multi-path device based on a round-robin algorithm.
In some embodiments, the data recording module 12 includes:
the average consumed time calculation unit is used for determining and recording IO processing times of each path device and the consumed time of each IO processing in real time, and determining the average IO consumed time of each path device by using the IO processing times of each path device and the consumed time of each IO processing;
and the statistical data generation unit is used for generating real-time statistical data based on the IO processing times of the path devices, the IO processing time consumption of each time and the IO average time consumption.
In some specific embodiments, the second request sending module 13 includes:
a waiting time length determining unit, configured to determine the unprocessed IO number of each path device, and determine an estimated waiting time length based on the IO average consumed time and the unprocessed IO number of each path device in the real-time statistical data;
and the target equipment determining unit is used for determining the path equipment with the shortest estimated waiting time in all path equipment corresponding to the target multi-path equipment as the target path equipment.
In some embodiments, the apparatus for selecting a path device with multi-path storage further includes:
the total flow calculation unit is used for calculating the IO total flow of each path device in real time by using a preset flow calculation formula;
and the total flow display unit is used for sending the total IO flow to a preset multipath tool in a server so as to display the total IO flow in the preset multipath tool based on a preset display format.
Further, an electronic device is also disclosed in the embodiments of the present application, fig. 4 is a block diagram of the electronic device 20 shown in the exemplary embodiments, and the content in the diagram cannot be considered as any limitation to the scope of the application.
Fig. 4 is a schematic structural diagram of an electronic device 20 according to an embodiment of the present disclosure. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a display 24, an input-output interface 25, a communication interface 26, and a communication bus 27. The memory 22 is configured to store a computer program, and the computer program is loaded and executed by the processor 21 to implement relevant steps in the multi-path storage path device selection method disclosed in any of the foregoing embodiments. In addition, the electronic device 20 in the present embodiment may be specifically an electronic computer.
In this embodiment, the power supply 23 is configured to provide a working voltage for each hardware device on the electronic device 20; the communication interface 26 can create a data transmission channel between the electronic device 20 and an external device, and a communication protocol followed by the communication interface is any communication protocol applicable to the technical solution of the present application, and is not specifically limited herein; the input/output interface 25 is configured to obtain external input data or output data to the outside, and a specific interface type thereof may be selected according to specific application requirements, which is not specifically limited herein.
In addition, the storage 22 is used as a carrier for storing resources, and may be a read-only memory, a random access memory, a magnetic disk, an optical disk, or the like, the resources stored thereon may include an operating system 221, a computer program 222, virtual machine data 223, and the like, and the virtual machine data 223 may include various data. The storage means may be a transient storage or a permanent storage.
The operating system 221 is used for managing and controlling each hardware device on the electronic device 20 and the computer program 222, and may be Windows Server, Netware, Unix, Linux, or the like. The computer program 222 may further include a computer program that can be used to perform other specific tasks in addition to the computer program that can be used to perform the multi-path stored path device selection method performed by the electronic device 20 disclosed in any of the foregoing embodiments.
Further, the present application discloses a computer-readable storage medium, wherein the computer-readable storage medium includes a Random Access Memory (RAM), a Memory, a Read-Only Memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a magnetic disk, or an optical disk or any other form of storage medium known in the art. Wherein the computer program when executed by a processor implements the multi-path stored path device selection method disclosed above. For the specific steps of the method, reference may be made to the corresponding contents disclosed in the foregoing embodiments, which are not described herein again.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed in the embodiment corresponds to the method disclosed in the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part. Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The method, the apparatus, the device and the storage medium for selecting the path device for multi-path storage according to the present invention are described in detail above, and a specific example is applied in the present disclosure to illustrate the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A multipath stored path equipment selection method is applied to a server and comprises the following steps:
sending the received IO request to each path device corresponding to a target multi-path device according to a preset polling mode, so that each path device can write the IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multi-path device;
monitoring the processing process of each path device on each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time to generate real-time statistical data;
when the preset path equipment switching condition is met, determining target path equipment based on the real-time statistical data, and sending the current IO request to be distributed to the target path equipment, so that the target path equipment writes IO data corresponding to the IO request to be distributed into the target volume.
2. The method for selecting the path device for the multi-path storage according to claim 1, wherein before the sending the received IO request to each path device corresponding to the target multi-path device according to a preset polling manner, the method further comprises:
establishing a path link between the server and a preset storage system by using the identification information of the server and a preset path link type; the preset storage system comprises a host and a volume with identification information of the server, and the volume is mapped to the host in advance;
and determining each path device based on the path link, and aggregating the path devices with the same WWID into one target multi-path device.
3. The multi-path stored path device selection method as claimed in claim 1, wherein the determining a target path device based on the real-time statistical data when a preset path device switching condition is satisfied comprises:
when the IO times of the data in the target volume meet the preset times, determining target path equipment based on the real-time statistical data;
or when the writing capacity of each path device meets a preset capacity value, determining a target path device based on the real-time statistical data.
4. The method for selecting the path device for the multi-path storage according to claim 1, wherein the sending the received IO request to each path device corresponding to the target multi-path device according to a preset polling manner includes:
and sending the received IO request to each path device corresponding to the target multi-path device based on a round-robin algorithm.
5. The method for selecting path devices with multi-path storage according to claim 1, wherein the recording the number of IO processing times and the time consumption of each IO processing for each path device in real time to generate the real-time statistical data comprises:
determining and recording IO processing times of each path device and each IO processing time consumption in real time, and determining the IO average time consumption of each path device by using the IO processing times of each path device and each IO processing time consumption;
and generating real-time statistical data based on the IO processing times of the path devices, the IO processing time consumption of each time and the IO average time consumption.
6. The multi-path stored path device selection method as claimed in claim 5, wherein said determining a target path device based on said real-time statistics comprises:
determining the number of unprocessed IOs of each path device, and determining the estimated waiting time length based on the average IO consumption time and the number of unprocessed IOs of each path device in the real-time statistical data;
and determining the path equipment with the shortest estimated waiting time in all path equipment corresponding to the target multi-path equipment as target path equipment.
7. The method for selecting path devices for multi-path storage according to any one of claims 1 to 6, wherein after the sending of the current IO request to be distributed to the target path device so that the target path device writes IO data corresponding to the IO request to be distributed in the target volume, the method further includes:
calculating the IO total flow of each path device in real time by using a preset flow calculation formula;
and sending the total IO flow to a preset multipath tool in a server to display in the preset multipath tool based on a preset display format.
8. A multi-path stored path equipment selection device is applied to a server and comprises the following components:
the first request sending module is used for sending the received IO request to each path device corresponding to a target multi-path device according to a preset polling mode so that each path device can write the IO data corresponding to the IO request into a target volume in a storage system corresponding to the target multi-path device;
the data recording module is used for monitoring the processing process of each path device on each IO request, and recording the IO processing times of each path device and the IO processing time consumption of each time in real time to generate real-time statistical data;
and the second request sending module is used for determining target path equipment based on the real-time statistical data when a preset path equipment switching condition is met, and sending the current IO request to be distributed to the target path equipment so that the target path equipment can write the IO data corresponding to the IO request to be distributed into the target volume.
9. An electronic device comprising a processor and a memory; wherein the processor, when executing the computer program stored in the memory, implements a multi-path stored path device selection method as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium for storing a computer program; wherein the computer program when executed by a processor implements a multi-path stored path device selection method as claimed in any one of claims 1 to 7.
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