CN109634783A - A kind of credible disaster tolerant backup system and its data processing method based on SAN - Google Patents
A kind of credible disaster tolerant backup system and its data processing method based on SAN Download PDFInfo
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- CN109634783A CN109634783A CN201811487692.1A CN201811487692A CN109634783A CN 109634783 A CN109634783 A CN 109634783A CN 201811487692 A CN201811487692 A CN 201811487692A CN 109634783 A CN109634783 A CN 109634783A
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- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000010076 replication Effects 0.000 claims description 5
- 238000011084 recovery Methods 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 description 9
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1464—Management of the backup or restore process for networked environments
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1469—Backup restoration techniques
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Abstract
This application discloses a kind of credible disaster tolerant backup system and its data processing method based on SAN, comprising: main website, including first server, the first storage equipment, the first FC interchanger, optical multiplexer；Equipment, the 2nd FC interchanger, optical demultiplexer and the first FCIP equipment are stored with city synchronous mirror station, including second server, second；Optical multiplexer is connect by DWDM with optical demultiplexer；Long-range long-distance disaster station, including third server, third store equipment, the 3rd FC interchanger, the 2nd FCIP equipment；First FCIP equipment is communicated by wide area network with the 2nd FCIP equipment.The application is by forming multistage disaster tolerance mode, the ability of system continuous operation can be provided for the system failure, the fast quick-recovery of realization system, operation system loss is preferably minimized when irresistible serious disaster occurs, influence of the operation of standby system to routine work is reduced, to ensure that high availability.
Description
Technical field
The present invention relates to technical field of memory, more particularly to a kind of credible disaster tolerant backup system and its number based on SAN
According to processing method.
Background technique
With the development of field of storage related information technology, the mass data that operation system generates becomes the important wealth of enterprise
It is rich.In this case, the integrality of emergency response and accident recovery ability, especially critical data when enterprise faces disaster with can
It is of increasing concern with property.
Remote disaster tolerance requires place remote website and local data center to have at a distance from quite remote, and many disaster tolerance systems at present
System only carries out redundancy protecting to data, and data duplication and the period restored are difficult to meet the needs of business continuance, disaster tolerance mistake
There is also the problem of data safety such as data inconsistency, unreliable, the disaster tolerance component failure of transmission link in journey.
Also, current backup/restoration system generally using the directly storage system of attachment application server or passes through local area network
With document form backup data transmitting, this inevitably brings the problem of reducing server performance and occupying local area network bandwidth.
Summary of the invention
In view of this, at the credible disaster tolerant backup system and its data that the purpose of the present invention is to provide a kind of based on SAN
Reason method can provide the ability of system continuous operation, and the data that can be preferably minimized traffic lost when disaster, and transmit occur
It is not take up application network bandwidth.Its concrete scheme is as follows:
A kind of credible disaster tolerant backup system based on SAN, comprising:
Main website, including first server, the first storage equipment are set with the first server and first storage respectively
First FC interchanger of standby connection, and the optical multiplexer being connect with the first FC interchanger；
With city synchronous mirror station, including second server, the second storage equipment, respectively with the second server and described
2nd FC interchanger of the second storage equipment connection, and the optical demultiplexer and first being connect with the 2nd FC interchanger
FCIP equipment；The optical multiplexer is connect by DWDM with the optical demultiplexer；
Long-range long-distance disaster station, including third server, third store equipment, respectively with the third server and described
Third stores the 3rd FC interchanger of equipment connection, and the 2nd FCIP equipment connecting with the 3rd FC interchanger；It is described
First FCIP equipment is communicated by wide area network with the 2nd FCIP equipment.
Preferably, in the above-mentioned credible disaster tolerant backup system based on SAN provided in an embodiment of the present invention, first clothes
Device be engaged in at least two, the first storage equipment has at least two, and the first FC interchanger has at least two.
Preferably, in the above-mentioned credible disaster tolerant backup system based on SAN provided in an embodiment of the present invention, each described first
Information exchange is carried out by heart-beat protocol between server.
Preferably, in the above-mentioned credible disaster tolerant backup system based on SAN provided in an embodiment of the present invention, described first is deposited
Storing up equipment includes master and auxiliary disk, so that redundancy expands to the rank of data block.
Preferably, in the above-mentioned credible disaster tolerant backup system based on SAN provided in an embodiment of the present invention, the same city is same
Walking the farthest data transmission distance between mirror site and the main website is 100km.
Preferably, in the above-mentioned credible disaster tolerant backup system based on SAN provided in an embodiment of the present invention, second clothes
Device be engaged in at least two, the second storage equipment has at least one, and the 2nd FC interchanger has at least one, institute
The first FCIP equipment is stated at least one.
Preferably, in the above-mentioned credible disaster tolerant backup system based on SAN provided in an embodiment of the present invention, the third clothes
Device be engaged in at least two, the third storage equipment has at least one, and the 3rd FC interchanger has at least one, institute
The 2nd FCIP equipment is stated at least one.
The embodiment of the invention also provides a kind of such as the above-mentioned credible disaster recovery backup based on SAN provided in an embodiment of the present invention
The data processing method of system, comprising:
In main website, the state of each first server is monitored using FC-SAN, when some first server breaks down,
Other first servers take over the task of the first server of failure, and startup separator restores；
Data directly are copied to same city from the first storage equipment of the main website by Server-Free data replication mode
The second storage equipment at synchronous mirror station；
The data transmission copied to the same city synchronous mirror station using FCIP agreement is to long-range long-distance disaster station.
Preferably, in above-mentioned data processing method provided in an embodiment of the present invention, further includes:
The second storage using RAID configuration method to the first storage equipment, the same city synchronous mirror station of the main website
Data in equipment and the third at long-range long-distance disaster station storage equipment are backed up.
Preferably, in above-mentioned data processing method provided in an embodiment of the present invention, further includes:
The second storage using CRC check method to the first storage equipment, the same city synchronous mirror station of the main website
Data in equipment and the third at long-range long-distance disaster station storage equipment are verified.
It can be seen from the above technical proposal that a kind of credible disaster tolerant backup system based on SAN provided by the present invention and
Its data processing method, comprising: main website, including first server, the first storage equipment are deposited with first server and first respectively
Store up the first FC interchanger of equipment connection, and the optical multiplexer connecting with the first FC interchanger；With city synchronous mirror station, including
Second server, the second storage equipment, the 2nd FC interchanger being connect respectively with second server and the second storage equipment, and
The optical demultiplexer and the first FCIP equipment being connect with the 2nd FC interchanger；Optical multiplexer is connected by DWDM and optical demultiplexer
It connects；Long-range long-distance disaster station, including third server, third store equipment, store equipment with third server and third respectively
3rd FC interchanger of connection, and the 2nd FCIP equipment being connect with the 3rd FC interchanger；First FCIP equipment passes through wide area
Net is communicated with the 2nd FCIP equipment.
The present invention by main website based on SAN, with the setting at city synchronous mirror station, long-range long-distance disaster station, formed multistage
Disaster tolerance mode, all for system hardware and software failure, storage device failure, HP M, user misoperation and natural calamity
The ability of system continuous operation can be provided, realize the fast quick-recovery of system, when irresistible serious disaster occurs by industry
Business system loss is preferably minimized, and influence of the operation to routine work of standby system is reduced, to ensure that high availability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of the credible disaster tolerant backup system provided in an embodiment of the present invention based on SAN；
Fig. 2 is the data processing method flow chart of the credible disaster tolerant backup system provided in an embodiment of the present invention based on SAN.
Specific embodiment
The storage architecture of traditional direct attached server of storage equipment has been unable to meet the storage demand of rapid growth.It deposits
Local Area Network (Storage Area Network, abbreviation SAN) connection server and storage equipment are stored up, application network is independently of
Be exclusively used in storage operation network.The network infrastructure of SAN can be optical-fibre channel (Fibre Channel, abbreviation FC)
Or Ethernet (Ethernet), the storing data type transmitted thereon are small computer system interface (Small Computer
System Interface, abbreviation SCSI) block number evidence.SAN is conducive to share storage resource among multiple servers, in SAN
The data of upper transmission are not take up application network bandwidth, therefore can provide advantage to construct unified backup/restoration system.
Credible disaster tolerant backup system provided in an embodiment of the present invention is based on high-performance, high-throughput, independently of local
The SAN of net provides the solution of believable data disaster tolerance and business continuance by multistage disaster tolerance mode.Below in conjunction with
Attached drawing in the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that is retouched
The embodiment stated is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work, belongs to the present invention
The range of protection.
The present invention provides a kind of credible disaster tolerant backup system based on SAN, as shown in Figure 1, comprising:
Main website, including first server, the first storage equipment are connect with first server and the first storage equipment respectively
First FC interchanger, and the optical multiplexer being connect with the first FC interchanger；
With city synchronous mirror station, including second server, the second storage equipment is stored with second server and second respectively
2nd FC interchanger of equipment connection, and the optical demultiplexer and the first FCIP equipment that are connect with the 2nd FC interchanger；Recovery
It is connect by DWDM with optical demultiplexer with device；
Long-range long-distance disaster station, including third server, third store equipment, store respectively with third server and third
3rd FC interchanger of equipment connection, and the 2nd FCIP equipment being connect with the 3rd FC interchanger；First FCIP equipment passes through
Wide area network is communicated with the 2nd FCIP equipment.
It should be noted that FC (Fibre Channel, optical-fibre channel) is a kind of measured network structure, definition
One multilayered structure by transmitted data on network, FC have high-performance and high reliability.The present invention is exactly based on FC exchange
Machine uses FC-SAN technology, has faster transmission speed.
In addition, the present invention uses FCIP equipment in long-range connection, used in order to realize remote data transmission
FCIP equipment is one kind of IP-based storage region technology (i.e. IP-SAN technology), it uses Ethernet to set for network foundation
It applies, can use various tools, security mechanism and the encryption technology of ICP/IP protocol, there is relative low price, be easily managed
The advantages of, existing TCP/IP data network can be made full use of by IP-SAN, carry out rapidly teledata disaster recovery backup.
Specifically, FCIP equipment encapsulates FC frame using TCP/IP, i.e. FCIP between two endpoints of IP network by establishing a tunnel
Road carrys out transmission fiber channel data, and in transmitting terminal, frame is packaged among TCP/IP, and in receiving end, IP packet obtains after unpacking
Fibre channel frame be sent to object construction.
In order to restore the normal operation of business rapidly when main website breaks down, system sets up the synchronous mirror in same city in Tong Cheng
As station, in order to extend local SAN network, to automate tape backup operation, shared storing data, support block stored messages
Long Distant Transmit, however FC is there are the limitation of intrinsic distance, and effective propagation path only has 10km, therefore uses DWDM (Dense
Wave Division Multiplexing, dense wavelength division multiplexing) technology make FC frame have farther away farthest transmission range.
Data replication mode has selected Server-Free mode, and data directly can copy data from storage equipment without server
Into mirror image, it is effectively reduced performance cost of the server in backup operation, and be not take up application network bandwidth.Due to same
City synchronous mirror station is not far at a distance from main website, and synchronous mirror postpones to be not obvious and the synchronous mirror with city caused by system
As station ensures completely the same with the business datum of local data center, the restorability of system is largely improved.
In practical applications, the backup procedure in long-range long-distance disaster station can use asynchronous replication mode, specifically,
After the I/O write-in master disk array of the application system of server, master disk array returns to host application system immediately and " writes
At " information, host application can continue reading and writing I/O operation, synchronous without waiting for backup diskette data；Meanwhile main center
Disk array will will write I/O write-in back-up disk array using the mechanism of itself, realize data protection.The mode is suitable for overlength
The environment of distance and low bandwidth, can be according to the size and bandwidth selection replicative cycle of duplication amount.
Further, in the specific implementation, in the above-mentioned credible disaster recovery backup system based on SAN provided in an embodiment of the present invention
In system, in main website (i.e. local data center), first server has at least two, passes through heartbeat between each first server
Agreement carries out information exchange, that is, SAN technology is utilized to realize that the server cluster of high availability, server cluster can monitor
The state of each server in cluster, in the case where some server breaks down, other servers can take over appointing for it
Business, and startup separator restores.That is SAN allows different servers to share memory node, the mapped for the server that malfunctions
Storage unit can seamlessly be taken over by the server of other in cluster.In addition, the first FC interchanger is at least two, it is such
The configuration of Dual-switch may be implemented that link is superfluous to be adopted, and the first FC interchanger and each first server, each first storage equipment are all deposited
Any link or interchanger error can still carry out data exchange in connecting link, SAN.First storage equipment has at least two
It is a, including master and auxiliary disk, redundancy can be made to expand to the rank of data block.Is achieved that in local data center in this way
One server, first storage equipment, the first FC interchanger it is completely redundant, avoid single failure point generation.
Further, in the specific implementation, in the above-mentioned credible disaster recovery backup system based on SAN provided in an embodiment of the present invention
In system, due to using DWDM technology, can be with the farthest data transmission distance between city synchronous mirror station and main website
100km.Wherein, having at least two with the second server in the synchronous mirror station of city, the second storage equipment has at least one,
2nd FC interchanger has at least one, and the first FCIP equipment has at least one.Third service in long-range long-distance disaster station
Device has at least two, and third, which stores equipment, has at least one, and the 3rd FC interchanger has at least one, the 2nd FCIP equipment
With at least one.
Based on the same inventive concept, the embodiment of the invention also provides a kind of credible disaster tolerant backup system based on SAN
Data processing method, since the principle that this method solves the problems, such as is similar to a kind of aforementioned credible disaster tolerant backup system based on SAN,
Therefore the implementation of this method may refer to the implementation of the credible disaster tolerant backup system based on SAN, and overlaps will not be repeated.
In the specific implementation, the data processing side of the credible disaster tolerant backup system provided in an embodiment of the present invention based on SAN
Method, as shown in Fig. 2, specifically includes the following steps:
S201, in main website, the state of each first server is monitored using FC-SAN, some first server occur therefore
When barrier, other first servers take over the task of the first server of failure, and startup separator restores；
S202, data are directly copied to same from the first of main website the storage equipment by Server-Free data replication mode
The second storage equipment at city synchronous mirror station；
S203, the data transmission copied to same city synchronous mirror station using FCIP agreement to long-range long-distance disaster station.
It, can in the data processing method of the above-mentioned credible disaster tolerant backup system based on SAN provided in an embodiment of the present invention
To make different servers share memory node by SAN, the mapped storage unit of failed server can be by cluster
Other servers seamlessly take over, avoid single failure point generate and have faster transmission speed, in addition can pass through
The normal operation for restoring business rapidly when main website breaks down with city synchronous mirror station, can also pass through long-range long-distance disaster station
It realizes remote data transmission, carries out rapidly teledata disaster recovery backup, the ability of system continuous operation can be provided in this way,
Operation system loss is preferably minimized when irresistible serious disaster occurs, reduces backup by the fast quick-recovery of realization system
Influence of the operation of system to routine work, to ensure that high availability.
Further, since the purpose of data backup is to save historical data and business datum before Xiao, when necessary
Data recovery is carried out, the integrality of Backup Data is the premise restored, if Backup Data passes through in transmission or storing process
Change, then what is restored will be wrong data, and backup also just loses meaning, and there are three levels to the protection of data integrity: wrong
It accidentally avoids, error detection and error correcting.Therefore, in order to guarantee the data integrity in storing process, in the specific implementation,
It can also include: using RAID (Redundant Array of in above-mentioned data processing method provided in an embodiment of the present invention
Independent Disks, redundant array of independent disks) configuration method to the first of main website the storage equipment, with city synchronous mirror
Data in the third storage equipment for the second storage equipment and long-range long-distance disaster station stood are backed up.RAID 3, RAID 4,
RAID 5 prevents loss of data caused by some disk failure in array using exclusive or (XOR) algorithm, and RAID 5 is most
Common RAID product, verification data are distributed on all disks in array, rather than use proprietary verification disk, therefore
There is higher error resilience performance.
In order to guarantee integrality of the data when transmitting between storing each node of network, the present invention may also include: using CRC
(Cyclic Redundancy Check, cyclic redundancy check) method of calibration is to the first storage equipment of main website, the synchronous mirror with city
It is verified as the third of the second storage equipment and long-range long-distance disaster station stood stores the data in equipment, by being passed in network
Defeated data frame adds frame check sequence, can find the mistake in data transmission in time.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with it is other
The difference of embodiment, same or similar part may refer to each other between each embodiment.For being filled disclosed in embodiment
It sets, for equipment, storage medium, since it is corresponded to the methods disclosed in the examples, so be described relatively simple, correlation
Place is referring to method part illustration.
To sum up, a kind of credible disaster tolerant backup system and its data processing method based on SAN provided in an embodiment of the present invention,
It include: main website, including first server, the first storage equipment, the connect respectively with first server and the first storage equipment
One FC interchanger, and the optical multiplexer being connect with the first FC interchanger；With city synchronous mirror station, including second server,
Two storage equipment, the 2nd FC interchanger being connect respectively with second server and the second storage equipment, and exchanged with the 2nd FC
The optical demultiplexer and the first FCIP equipment of machine connection；Optical multiplexer is connect by DWDM with optical demultiplexer；Long-range strange land holds
Calamity station, including third server, third store equipment, and the 3rd FC connecting respectively with third server and third storage equipment is handed over
It changes planes, and the 2nd FCIP equipment being connect with the 3rd FC interchanger；First FCIP equipment is set by wide area network and the 2nd FCIP
It is standby to be communicated.In this way by main website based on SAN, with the setting at city synchronous mirror station, long-range long-distance disaster station, formed multistage
Disaster tolerance mode, all for system hardware and software failure, storage device failure, HP M, user misoperation and natural calamity
The ability of system continuous operation can be provided, realize the fast quick-recovery of system, when irresistible serious disaster occurs by industry
Business system loss is preferably minimized, and influence of the operation to routine work of standby system is reduced, to ensure that high availability.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The credible disaster tolerant backup system to provided by the present invention based on SAN and its data processing method have carried out in detail above
Thin to introduce, used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of credible disaster tolerant backup system based on SAN characterized by comprising
Main website, including first server, the first storage equipment connect with the first server and the first storage equipment respectively
The first FC interchanger connect, and the optical multiplexer being connect with the first FC interchanger；
With city synchronous mirror station, including second server, the second storage equipment, respectively with the second server and described second
The 2nd FC interchanger of equipment connection is stored, and the optical demultiplexer connecting with the 2nd FC interchanger and the first FCIP are set
It is standby；The optical multiplexer is connect by DWDM with the optical demultiplexer；
Long-range long-distance disaster station, including third server, third store equipment, respectively with the third server and the third
Store the 3rd FC interchanger of equipment connection, and the 2nd FCIP equipment connecting with the 3rd FC interchanger；Described first
FCIP equipment is communicated by wide area network with the 2nd FCIP equipment.
2. the credible disaster tolerant backup system according to claim 1 based on SAN, which is characterized in that the first server
With at least two, the first storage equipment has at least two, and the first FC interchanger has at least two.
3. the credible disaster tolerant backup system according to claim 2 based on SAN, which is characterized in that each first service
Information exchange is carried out by heart-beat protocol between device.
4. the credible disaster tolerant backup system according to claim 3 based on SAN, which is characterized in that first storage is set
Standby includes master and auxiliary disk, so that redundancy expands to the rank of data block.
5. the credible disaster tolerant backup system according to claim 1 based on SAN, which is characterized in that the same city synchronizes mirror
As the farthest data transmission distance between station and the main website is 100km.
6. the credible disaster tolerant backup system according to claim 1 based on SAN, which is characterized in that the second server
With at least two, the second storage equipment has at least one, and the 2nd FC interchanger has at least one, and described the
One FCIP equipment has at least one.
7. the credible disaster tolerant backup system according to claim 6 based on SAN, which is characterized in that the third server
With at least two, the third storage equipment has at least one, and the 3rd FC interchanger has at least one, and described the
Two FCIP equipment have at least one.
8. a kind of data processing method of the credible disaster tolerant backup system as described in any one of claim 1 to 7 based on SAN,
It is characterized in that, comprising:
In main website, the state of each first server is monitored using FC-SAN, when some first server breaks down, other
First server takes over the task of the first server of failure, and startup separator restores；
It is synchronous to same city that data directly are copied from the first storage equipment of the main website by Server-Free data replication mode
Second storage equipment of mirror site；
The data transmission copied to the same city synchronous mirror station using FCIP agreement is to long-range long-distance disaster station.
9. data processing method according to claim 8, which is characterized in that further include:
Using RAID configuration method to the first storage equipment of the main website, the second storage equipment at the same city synchronous mirror station
It is backed up with the data in the third storage equipment at the long-range long-distance disaster station.
10. data processing method according to claim 9, which is characterized in that further include:
Using CRC check method to the first storage equipment of the main website, the second storage equipment at the same city synchronous mirror station
It is verified with the data in the third storage equipment at the long-range long-distance disaster station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487692.1A CN109634783A (en) | 2018-12-06 | 2018-12-06 | A kind of credible disaster tolerant backup system and its data processing method based on SAN |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811487692.1A CN109634783A (en) | 2018-12-06 | 2018-12-06 | A kind of credible disaster tolerant backup system and its data processing method based on SAN |
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| CN109634783A true CN109634783A (en) | 2019-04-16 |
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| CN201811487692.1A Withdrawn CN109634783A (en) | 2018-12-06 | 2018-12-06 | A kind of credible disaster tolerant backup system and its data processing method based on SAN |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540876A (en) * | 2020-12-21 | 2021-03-23 | 中国人民解放军61623部队 | Remote disaster recovery backup method and system for artificial telephone exchange |
-
2018
- 2018-12-06 CN CN201811487692.1A patent/CN109634783A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112540876A (en) * | 2020-12-21 | 2021-03-23 | 中国人民解放军61623部队 | Remote disaster recovery backup method and system for artificial telephone exchange |
| CN112540876B (en) * | 2020-12-21 | 2024-05-31 | 中国人民解放军61623部队 | Remote disaster recovery backup method and system for manual telephone exchange |
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Application publication date: 20190416 |