CN111352573B - Distributed storage method - Google Patents

Distributed storage method Download PDF

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CN111352573B
CN111352573B CN201811568526.4A CN201811568526A CN111352573B CN 111352573 B CN111352573 B CN 111352573B CN 201811568526 A CN201811568526 A CN 201811568526A CN 111352573 B CN111352573 B CN 111352573B
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storage device
distributed storage
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mirror image
local computer
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CN111352573A (en
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汪贺
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Nanjing Cornerstone Data Technology Co ltd
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Nanjing Cornerstone Data Technology Co ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601Interfaces specially adapted for storage systems
    • G06F3/0602Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/0614Improving the reliability of storage systems
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00Error detection; Error correction; Monitoring
    • G06F11/07Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14Error detection or correction of the data by redundancy in operation
    • G06F11/1402Saving, restoring, recovering or retrying
    • G06F11/1446Point-in-time backing up or restoration of persistent data
    • G06F11/1448Management of the data involved in backup or backup restore
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601Interfaces specially adapted for storage systems
    • G06F3/0628Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0646Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601Interfaces specially adapted for storage systems
    • G06F3/0668Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/067Distributed or networked storage systems, e.g. storage area networks [SAN], network attached storage [NAS]

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
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  • Quality & Reliability (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Abstract

The invention discloses a distributed storage method, relates to the technical field of distributed storage, and aims to solve the problems that when a user calls data in other distributed storage equipment in the prior art, a central storage equipment is required to inquire the corresponding distributed storage equipment, and the data is redistributed after being uploaded, so that the data transmission speed is low. The central storage device is respectively in bidirectional connection with a first distributed storage device, a second distributed storage device and an Nth distributed storage device, the first distributed storage device is in bidirectional connection with a first mirror image storage device, the first distributed storage device is in bidirectional connection with the second distributed storage device, the first distributed storage device is in bidirectional connection with the Nth distributed storage device, the first distributed storage device is respectively in bidirectional connection with a first local computer device and an mth local computer device, and the first local computer device comprises a first local storage.

Description

Distributed storage method
Technical Field
The invention relates to the technical field of distributed storage, in particular to a distributed storage method.
Background
A distributed storage system is a system in which data is stored in a distributed manner in a plurality of independent devices. The traditional network storage system adopts a centralized storage server to store all data, the storage server becomes the bottleneck of the system performance, is also the focus of reliability and safety, and cannot meet the requirement of large-scale storage application. The distributed network storage system adopts an expandable system structure, utilizes a plurality of storage servers to share the storage load, and utilizes the position server to position the storage information, thereby not only improving the reliability, the availability and the access efficiency of the system, but also being easy to expand.
The distributed storage mode can reduce the burden of central storage, but due to the fact that backup has certain interval time, data are lost and difficult to retrieve, a user needs to call the data layer by layer, and the transmission speed of the data is influenced; therefore, the market urgently needs to develop a distributed storage method to help people solve the existing problems.
Disclosure of Invention
The present invention aims to provide a distributed storage method, so as to solve the problem that when a user calls data in other distributed storage devices, a central storage device is required to query corresponding distributed storage devices, and then the data is redistributed after being uploaded, so that the data transmission speed is slow.
In order to achieve the purpose, the invention provides the following technical scheme: a distributed storage method comprises a central storage device which is respectively in bidirectional connection with a first distributed storage device, a second distributed storage device and an Nth distributed storage device, the first distributed storage device is in bidirectional connection with a first mirror image storage device, the first distributed storage device is in bidirectional connection with the second distributed storage device, the first distributed storage device is in bidirectional connection with the Nth distributed storage device, the first distributed storage device is respectively in bidirectional connection with a first local computer device and an mth local computer device, the first local computer device comprises a first local storage, the mth local computer device comprises an mth local storage, the first distributed storage device is respectively in bidirectional connection with the first local storage and the mth local storage, and the second distributed storage device is in bidirectional connection with the second mirror image storage device, the second distributed storage device is bidirectionally connected with the Nth distributed storage device, the second distributed storage device is bidirectionally connected with the m +1 th local computer device and the N-th local computer device respectively, the m +1 th local computer device includes an m +1 th local memory, the nth local computer device includes an nth local memory, the second distributed storage device is respectively bidirectionally connected with the m +1 th local storage and the nth local storage, the Nth distributed storage device is bidirectionally connected with the Nth mirror image storage device, the Nth distributed storage device is respectively bidirectionally connected with the (N + 1) th local computer device and the(s) th local computer device, the n +1 th local computer device includes an n +1 th local memory, the s local computer device includes an s local memory, the Nth distributed storage device is bidirectionally coupled to the (N + 1) th local storage and the(s) th local storage, respectively.
As an optimal technical solution of the power grid intelligent terminal transfer cabinet management system of the present invention, the input ends of the first local computer device and the first distributed storage device are both connected to the output end of the network server.
As an optimal technical solution of the power grid intelligent terminal transfer cabinet management system, the first mirror image storage device is respectively connected with the first switch, the second switch and the nth switch in a bidirectional manner, the first switch, the second switch and the nth switch are all connected with the first distributed storage device in a bidirectional manner, an input end of the first mirror image storage device is connected with an output end of a mirror image storage device detection device, an input end of the first distributed storage device is connected with an output end of a distributed storage device detection device, and the mirror image storage device detection device is connected with the distributed storage device detection device in a bidirectional manner.
As a preferred technical solution of the power grid intelligent terminal transfer cabinet management system of the present invention, the model of the central storage device is IBM eServer p5550, the size of the storage space of the first mirror image storage device is the same as the size of the storage space of the first distributed storage device, the first distributed storage device includes a processor, and the model of the processor is AMD Opteron 800.
As an optimal technical solution of the power grid intelligent terminal transfer cabinet management system of the present invention, the first local computer device, the mth local computer device, the m +1 local computer device, the nth local computer device, the n +1 local computer device, and the s local computer device are all computer clients accessible to a network.
As an optimal technical scheme of the power grid intelligent terminal transfer cabinet management system, the model of the network server is SUN Fire V40 z.
As an optimal technical scheme of the transit cabinet management system of the power grid intelligent terminal, the models of the first switch, the second switch and the nth switch are S20/MS 30.
A first method of operation, comprising the steps of:
s1: the first distributed storage equipment packs and integrates the backup data, and packs the backup data into n parts;
s2: the first switch, the second switch and the nth switch are used for carrying out data transmission on the packed data of the first distribution storage device;
s3: the first mirror image storage device backs up the packed data of the first switch, the second switch and the nth switch;
s4: the mirror image storage device detection device detects a data file of the first mirror image storage device;
s5: the distributed storage equipment detection equipment detects a data file of the first distributed storage equipment;
s6: the mirror image storage device detection device and the distributed storage device detection device are compared to detect a file;
s7: the detection files compared by the mirror image storage device detection device and the distributed storage device detection device are different, and the first distributed storage device backups the un-backed-up data according to the comparison result of the distributed storage device detection device by the steps of S1-S3.
A second method of operation, comprising the steps of:
s1: the data file of the first distributed storage device is lost, and the mirror image storage device detection device detects the data file of the first mirror image storage device;
s2: the distributed storage equipment detection equipment detects a data file of the first distributed storage equipment;
s3: the mirror image storage device detection device and the distributed storage device detection device are compared to detect a file;
s4: the first mirror image storage device packs and integrates the lost data according to the comparison result of the mirror image storage device detection device, and packs the lost data into n parts;
s5: the first switch, the second switch and the nth switch perform data transmission on the packed data of the first mirror image storage device;
s6: and the first distribution storage equipment performs data recovery on the packed data of the first switch, the second switch and the nth switch.
A method of operation comprising the steps of:
s1: the first local computer device, the mth local computer device, the m +1 th local computer device, the nth local computer device, the N +1 th local computer device, and the s local computer device uploading data into the first distributed storage device, the second distributed storage device, and the nth distributed storage device;
s2: the first distributed storage device, the second distributed storage device and the Nth distributed storage device respectively back up data information to the first mirror image storage device, the second mirror image storage device and the Nth mirror image storage device;
s3: the first distributed storage device, the second distributed storage device and the Nth distributed storage device upload storage positions of data information to the central storage device;
s4: when the first local computer equipment needs to call the data in the second distributed storage equipment, the first distributed storage equipment sends a call request to the central storage equipment;
s5: the central storage device communicating location information to the first distributed storage device;
s6: the first distributed storage device calls data in the second distributed storage device;
s7: the first distributed storage device sends the invoked data to the first local computer device.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, data backup is carried out on the distributed storage equipment through the arrangement of the mirror image storage equipment such as the first mirror image storage equipment, the second mirror image storage equipment and the like, and once the data of the distributed storage equipment is lost, the mirror image storage equipment can carry out data retransmission and calling;
2. in the invention, the central storage device does not store data information, only stores the position information of the distributed storage device storing key information, and directly calls data to the target distributed storage device through the position information stored in the central storage device when a user needs to cross-region data calling, thereby reducing data transmission steps and data transmission time;
3. the data backup method and the data backup device have the advantages that data transmission is simultaneously carried out on the mirror image storage device and the distributed storage device through the switching devices such as the first switch and the second switch, the mirror image storage device and the distributed storage device integrate and repack data information before data transmission, and the switching devices such as the first switch and the second switch clearly carry out data transmission on packed data, so that the data backup speed is improved.
Drawings
FIG. 1 is a system architecture diagram of a distributed storage method of the present invention;
FIG. 2 is a schematic diagram of the structure operation of a distributed storage method according to the present invention;
fig. 3 is a backup schematic diagram of a distributed storage method according to the present invention.
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.
Referring to fig. 1-3, an embodiment of the present invention is shown: a distributed storage method comprises a central storage device, wherein data information is not stored in the central storage device, only the position information of a first distributed storage device, a second distributed storage device and an Nth distributed storage device for storing key information is stored, when a user needs to perform data calling across regions, the position information stored in the central storage device is used for directly performing data calling to the corresponding first distributed storage device, the second distributed storage device and the Nth distributed storage device, so that the data transmission step and the data transmission time are reduced, the central storage device is respectively connected with the first distributed storage device, the second distributed storage device and the Nth distributed storage device in a bidirectional mode, the first distributed storage device is connected with a first mirror image storage device in a bidirectional mode, the first distributed storage device is connected with the second distributed storage device in a bidirectional mode, and the first distributed storage device is connected with the Nth distributed storage device in a bidirectional mode, the first distributed storage device is bidirectionally coupled to the first local computer device and the mth local computer device, respectively, the first local computer device includes a first local storage, the mth local computer device includes a mth local storage, the first distributed storage device is bidirectionally coupled to the first local storage and the mth local storage, respectively, the second distributed storage device is bidirectionally coupled to the second mirror storage device, the second distributed storage device is bidirectionally coupled to the nth distributed storage device, the second distributed storage device is bidirectionally coupled to the m +1 th local computer device and the nth local computer device, respectively, the m +1 th local computer device includes an m +1 th local storage, the nth local computer device includes an nth local storage, the second distributed storage device is bidirectionally coupled to the m +1 th local storage and the nth local storage, respectively, the nth distributed storage device is bidirectionally connected with the nth mirror image storage device, the nth distributed storage device is bidirectionally connected with the (N + 1) th local computer device and the(s) th local computer device respectively, the (N + 1) th local computer device comprises an (N + 1) th local storage, the(s) th local computer device comprises an(s) th local storage, and the nth distributed storage device is bidirectionally connected with the (N + 1) th local storage and the(s) th local storage respectively.
Further, the input ends of the first local computer device and the first distribution storage device are connected with the output end of the network server.
Furthermore, the first mirror image storage device is respectively in bidirectional connection with the first switch, the second switch and the nth switch, the first switch, the second switch and the nth switch are all in bidirectional connection with the first distributed storage device, the input end of the first mirror image storage device is connected with the output end of the mirror image storage device detection device, the input end of the first distributed storage device is connected with the output end of the distributed storage device detection device, and the mirror image storage device detection device is in bidirectional connection with the distributed storage device detection device.
Further, the model of the central storage device is IBM eServer p5550, the size of the storage space of the first mirror image storage device is the same as the size of the storage space of the first distributed storage device, the first mirror image storage device, the second mirror image storage device and the nth mirror image storage device perform data backup on the first distributed storage device, the second distributed storage device and the nth distributed storage device, once data loss occurs in the first distributed storage device, the second distributed storage device and the nth distributed storage device, the first mirror image storage device, the second mirror image storage device and the nth mirror image storage device can perform data retransmission and call, the first distributed storage device includes a processor, and the model of the processor is AMD Opteron 800.
Further, the first local computer device, the mth local computer device, the m +1 th local computer device, the nth local computer device, the n +1 th local computer device, and the s local computer device are all computer clients that can access a network.
Further, the model of the web server is SUN Fire V40 z.
Further, the model of the first switch, the second switch and the nth switch is S20/MS 30.
A distributed storage method comprises the following data backup steps:
s1: the first distributed storage equipment packs and integrates the backup data and packs the backup data into n parts;
s2: the first switch, the second switch and the nth switch are used for transmitting the data of the packed data of the first distribution storage device at the same time, so that the transmission speed is greatly increased;
s3: the first mirror image storage device backs up the packed data of the first switch, the second switch and the nth switch;
s4: detecting a data file of a first mirror image storage device by a mirror image storage device detection device;
s5: detecting a data file of a first distributed storage device by a distributed storage device detection device;
s6: comparing the mirror image storage device detection equipment with the distributed storage device detection equipment to detect a file;
s7: the mirror image storage device detection device and the distributed storage device detection device are different in comparison detection files, and the first distributed storage device backups the un-backed up data again according to the comparison result of the distributed storage device detection device in the steps of S1-S3.
A distributed storage method comprising the steps of:
s1: the data file of the first distributed storage device is lost, and the data file of the first mirror image storage device is detected by the mirror image storage device detection device;
s2: detecting a data file of a first distributed storage device by a distributed storage device detection device;
s3: comparing the mirror image storage device detection equipment with the distributed storage device detection equipment to detect a file;
s4: the first mirror image storage device packs and integrates the lost data according to the comparison result of the mirror image storage device detection device, and packs the lost data into n parts;
s5: the first switch, the second switch and the nth switch are used for carrying out data transmission on the packed data of the first mirror image storage device;
s6: the first distribution storage device performs data recovery on the packed data of the first switch, the second switch and the nth switch, and the data recovery is realized through the backup data of the first mirror image storage device, so that the loss caused by data loss is avoided.
A distributed storage method comprises the following data calling steps:
s1: the first local computer device, the mth local computer device, the (m + 1) th local computer device, the nth local computer device, the (N + 1) th local computer device and the s local computer device upload data to the first distributed storage device, the second distributed storage device and the nth distributed storage device;
s2: the first distributed storage device, the second distributed storage device and the Nth distributed storage device respectively backup data information to the first mirror image storage device, the second mirror image storage device and the Nth mirror image storage device;
s3: the first distributed storage equipment, the second distributed storage equipment and the Nth distributed storage equipment upload the storage positions of the data information to the central storage equipment;
s4: when the first local computer equipment needs to call the data in the second distributed storage equipment, the first distributed storage equipment sends a call request to the central storage equipment;
s5: the central storage device communicating the location information to the first distributed storage device;
s6: the first distribution storage device calls data in the second distribution storage device;
s7: the first distributed storage device sends the invoked data to the first local computer device.
The working principle is as follows: when the system is used, the first local computer device, the mth local computer device, the m +1 local computer device, the nth local computer device, the N +1 local computer device and the s local computer device upload data to the first distributed storage device, the second distributed storage device and the nth distributed storage device, the first distributed storage device, the second distributed storage device and the nth distributed storage device respectively backup data information to the first mirror image storage device, the second mirror image storage device and the nth mirror image storage device, the first distributed storage device, the second distributed storage device and the nth distributed storage device upload storage positions of the data information to the central storage device, when the first local computer device needs to call data in the second distributed storage device, the first distributed storage device sends a call request to the central storage device, the central storage device conveys the position information to a first distributed storage device, the first distributed storage device calls data in a second distributed storage device, the first distributed storage device sends the called data to a first local computer device, and the work steps of calling the data by the mth local computer device, the mth +1 local computer device, the nth +1 local computer device and the sth local computer device are the same.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (9)

1. A distributed storage method comprises a central storage device, and is characterized in that: the central storage device is respectively in bidirectional connection with a first distributed storage device, a second distributed storage device and an Nth distributed storage device, the first distributed storage device is in bidirectional connection with a first mirror image storage device, the first distributed storage device is in bidirectional connection with a second distributed storage device, the first distributed storage device is in bidirectional connection with an Nth distributed storage device, the first distributed storage device is respectively in bidirectional connection with a first local computer device and an mth local computer device, the first local computer device comprises a first local storage, the mth local computer device comprises an mth local storage, the first distributed storage device is respectively in bidirectional connection with a first local storage and an mth local storage, the second distributed storage device is in bidirectional connection with a second mirror image storage device, the second distributed storage device is in bidirectional connection with the Nth distributed storage device, the second distributed storage device is bidirectionally coupled to the m +1 th local computing device and the nth local computing device, the m +1 th local computer device includes an m +1 th local memory, the nth local computer device includes an nth local memory, the second distributed storage device is respectively bidirectionally connected with the m +1 th local storage and the nth local storage, the Nth distributed storage device is bidirectionally connected with the Nth mirror image storage device, the Nth distributed storage device is respectively bidirectionally connected with the (N + 1) th local computer device and the(s) th local computer device, the n +1 th local computer device includes an n +1 th local memory, the s local computer device includes an s local memory, the Nth distributed storage device is respectively in bidirectional connection with the (N + 1) th local storage and the(s) th local storage;
the distributed storage method comprises the following data calling steps;
s1: the first local computer device, the mth local computer device, the m +1 th local computer device, the nth local computer device, the N +1 th local computer device, and the s local computer device uploading data into the first distributed storage device, the second distributed storage device, and the nth distributed storage device;
s2: the first distributed storage device, the second distributed storage device and the Nth distributed storage device respectively back up data information to the first mirror image storage device, the second mirror image storage device and the Nth mirror image storage device;
s3: the first distributed storage device, the second distributed storage device and the Nth distributed storage device upload storage positions of data information to the central storage device;
s4: when the first local computer equipment needs to call the data in the second distributed storage equipment, the first distributed storage equipment sends a call request to the central storage equipment;
s5: the central storage device communicating location information to the first distributed storage device;
s6: the first distributed storage device calls data in the second distributed storage device;
s7: the first distributed storage device sends the invoked data to the first local computer device.
2. A distributed storage method according to claim 1, wherein: the input ends of the first local computer device and the first distribution storage device are both connected with the output end of the network server.
3. A distributed storage method according to claim 1, wherein: first mirror image storage equipment respectively with first switch, second switch and nth switch both way junction, first switch, second switch and nth switch all with first distribution storage equipment both way junction, first mirror image storage equipment's input is connected with mirror image storage equipment check out test set's output, first distribution storage equipment's input is connected with distribution storage equipment check out test set's output, mirror image storage equipment check out test set and distribution storage equipment check out test set both way junction.
4. A distributed storage method according to claim 1, wherein: the model of the central storage device is IBM eServer p5550, the size of the storage space of the first mirror image storage device is the same as that of the first distributed storage device, the first distributed storage device comprises a processor, and the model of the processor is AMD Opteron 800.
5. A distributed storage method according to claim 1, wherein: the first local computer device, the mth local computer device, the m +1 th local computer device, the nth local computer device, the n +1 th local computer device and the s local computer device are all computer clients capable of accessing to a network.
6. A distributed storage method according to claim 2, wherein: the model of the network server is SUN Fire V40 z.
7. A distributed storage method according to claim 3, wherein: the model of the first switch, the second switch and the nth switch is S20/MS 30.
8. A distributed storage method according to claim 3, comprising the following data backup steps:
s1: the first distributed storage equipment packs and integrates the backup data, and packs the backup data into n parts;
s2: the first switch, the second switch and the nth switch are used for carrying out data transmission on the packed data of the first distribution storage device;
s3: the first mirror image storage device backs up the packed data of the first switch, the second switch and the nth switch;
s4: the mirror image storage device detection device detects a data file of the first mirror image storage device;
s5: the distributed storage equipment detection equipment detects a data file of the first distributed storage equipment;
s6: the mirror image storage device detection device and the distributed storage device detection device are compared to detect a file;
s7: the detection files compared by the mirror image storage device detection device and the distributed storage device detection device are different, and the first distributed storage device backups the un-backed up data again according to the comparison result of the distributed storage device detection device in the steps of S1-S3.
9. A distributed storage method according to claim 3, comprising the following data recovery steps:
s1: the data file of the first distributed storage device is lost, and the mirror image storage device detection device detects the data file of the first mirror image storage device;
s2: the distributed storage equipment detection equipment detects a data file of the first distributed storage equipment;
s3: the mirror image storage device detection device and the distributed storage device detection device are compared to detect a file;
s4: the first mirror image storage device packs and integrates the lost data according to the comparison result of the mirror image storage device detection device, and packs the lost data into n parts;
s5: the first switch, the second switch and the nth switch perform data transmission on the packed data of the first mirror image storage device;
s6: and the first distribution storage equipment performs data recovery on the packed data of the first switch, the second switch and the nth switch.
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CN107329708A (en) * 2017-07-04 2017-11-07 郑州云海信息技术有限公司 A kind of distributed memory system realizes data cached method and system
CN108292196A (en) * 2015-12-02 2018-07-17 净睿存储股份有限公司 Write data into the storage system of the storage device of storage device and Second Type including the first kind

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104424048A (en) * 2013-08-29 2015-03-18 国际商业机器公司 Data storage method and equipment
CN108292196A (en) * 2015-12-02 2018-07-17 净睿存储股份有限公司 Write data into the storage system of the storage device of storage device and Second Type including the first kind
CN107329708A (en) * 2017-07-04 2017-11-07 郑州云海信息技术有限公司 A kind of distributed memory system realizes data cached method and system

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