CN111930312B - Dual-control storage array asynchronous logic unit access method - Google Patents
Dual-control storage array asynchronous logic unit access method Download PDFInfo
- Publication number
- CN111930312B CN111930312B CN202010804112.8A CN202010804112A CN111930312B CN 111930312 B CN111930312 B CN 111930312B CN 202010804112 A CN202010804112 A CN 202010804112A CN 111930312 B CN111930312 B CN 111930312B
- Authority
- CN
- China
- Prior art keywords
- active
- state
- controller
- target
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/0614—Improving the reliability of storage systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0629—Configuration or reconfiguration of storage systems
- G06F3/0634—Configuration or reconfiguration of storage systems by changing the state or mode of one or more devices
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
- G06F3/0658—Controller construction arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Hardware Redundancy (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention relates to a double-control storage array asynchronous logic unit access method, and belongs to the technical field of computer storage. According to the asynchronous logic unit access mode provided by the invention, two controllers can respectively access different logic units to realize double control and double activity. The two controllers do not need to negotiate the access control to the same logic unit through communication, but distribute the load balance of the host on the two controllers through the configuration of the target port, so that the control method is an out-of-band control mode. Compared with the synchronous logic unit access mode, the asynchronous logic unit access mode can obviously reduce the communication overhead among controllers, obviously improve the logic unit access efficiency and improve the access performance of the logic unit.
Description
Technical Field
The invention relates to the technical field of computer storage, in particular to a double-control storage array asynchronous logic unit access method.
Background
The dual control memory array is divided into synchronous logic unit access and asynchronous logic unit access according to different modes of working access logic units of two controllers. If two controllers access the same logical unit at the same time, we refer to synchronous logical unit access, and if two controllers access different logical units at the same time, we refer to asynchronous logical unit access. If the same logic unit is accessed, the controller needs to ensure that the IO processing of the logic unit and the same physical block is finished, and then the other controller can access the physical block. Writing the same physical block at the same time necessarily results in unexpected data corruption, which is technically more difficult to implement, requires two controllers to establish a real-time communication link, negotiates a physical block access conflict resolution mechanism, and has a certain influence on performance. Asynchronous logical unit access this problem is not present since the two controllers access different storage logical units. As two implementation modes of double control and double activity, two controllers access the same logic unit in the access mode of the synchronous logic unit, and the cooperation of the two controllers is realized by internal heartbeat or a non-transparent bridge and other mechanisms, so that a locking mechanism of a strip layer is required to be realized, and the control mode of 'in-band'. Synchronous logic unit access entails communication overhead for both controllers.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problems that: how to design an asynchronous logic unit access control method to realize double control and double activation of a logic unit and fault take over.
(II) technical scheme
In order to solve the technical problems, the invention provides a double-control storage array asynchronous logic unit access method, in the method, for a logic unit which is in a ready state without state transition and is in fault transition, an ALUA-based Active/Active mode implementation mode is adopted for access control; for a logic unit which needs a certain failover time and realizes Active/Standby switching in the class of the failover time, an ALUA-based Active/Standby implementation mode is adopted for access control.
Preferably, in the method, the access control performed by adopting an implementation mode of Active/Active mode based on ALUA specifically comprises the following steps:
a. initializing a device group: setting up a device group, setting two device groups, setting up two target groups for each device group, classifying target ports of a first controller into the first target group, classifying target ports of a second controller into the second target group, setting ALUA states in the first target group of the first device group as active states, setting ALUA states in the second target group of the first device group as standby states, setting ALUA states in the first target group of the second device group as standby states, setting ALUA states in the second target group of the second device group as active states, wherein the first device group is classified into logic unit devices with the first controller as an owner, and the second device group is classified into logic unit devices with the second controller as the owner;
b. logic unit allocation: when the logical unit is allocated, firstly, the device is established and mapped to the designated target port, and two modes can be used for designating the logical unit owner controller:
method 1: designating the odd-numbered owners of the logic units as a first controller, placing the corresponding devices of the logic units into a first device group, designating the even-numbered owners of the logic units as a second controller, and placing the corresponding devices of the logic units into a second device group;
method 2: determining a logic unit owner according to the input parameter, wherein the input ALUA owner parameter is 1, putting the corresponding equipment of the logic unit into a first equipment group, and if the input ALUA owner parameter is 2, putting the corresponding equipment of the logic unit into a second equipment group;
c. the host initiating terminal obtains port information: the method comprises the steps that an initiating terminal obtains grouping information of two controllers through a GET ALUASTATE command, and the grouping information of the two controllers is kept consistent, namely, a target port group1 in a first equipment group is in an active mode, a target port group2 is in a standby mode, a target port group1 in a second equipment group is in a standby state, and the target port group2 is in an active state;
d. path failover: and the host multipath program calculates the priority of each controller path according to the ALUA state, accesses the active state path preferentially, accesses the standby state path according to a preset strategy when the priority path fails, and simultaneously sends out an SETALUASTATE command to the path target port to promote the path target port state to be active.
Preferably, in the method, the access control by adopting an ALUA-based Active/Standby implementation mode specifically comprises the following steps:
a. initializing a device group: setting up a device group, setting up2 target groups, wherein the first target group is a target port on a first controller, the second target group is a target port on a second controller, the ALUA state of the target groups in the device group is determined according to the attribute of the controllers, the first controller is a main controller, the ALUA state of the first target group is active, and the ALUA state of the second target group is standby; the second controller is a main controller, and the ALUA state of the first target group is standby, and the ALUA state of the second target group is active;
b. logic unit allocation: during logic unit allocation, designating the logic unit equipment to be allocated to the equipment group initialized in the step a;
c. the host initiating terminal obtains port information: the method comprises the steps that an initiating terminal obtains grouping information of two controllers through a GET ALUASTATE command, the grouping information of the two controllers is kept consistent, namely, if a first controller is a main controller, a first target group is in an active state, a second target group is in a standby state, and if the second controller is the main controller, the first target group is in the standby state, and the second target group is in the active state;
d. path failover: and the host multipath program calculates the path priority of each controller according to the ALUA state, accesses the active state path preferentially, and when the priority path fails, the other controller converts the ALUA state of the corresponding target group into a transiting state, executes the state conversion program, sets the target group state as the active state after the completion of the state conversion program, and accesses the path after the host multipath program detects that the path state of the other controller is the active state, thereby completing the fault transfer.
Preferably, the implementation of the ALUA-based Active/Active mode is an Active state transition.
Preferably, in an implementation manner of an Active/Active mode based on ALUA, the host detects port information in real time through a getaluast command, and when the port does not acquire state information, the host marks the path state as fail, and sets another target port as Active through a setaluast command, so as to realize seamless switching of IO access of the controller logic unit, and no perception is applied to an upper layer.
Preferably, the ALUA based Active/Standby implementation is a passive state transition.
Preferably, in an ALUA-based Active/Standby implementation, the controller logic may perform preparation, including configuration and cache restoration, in the transition state.
Preferably, in an implementation manner of Active/Standby based on ALUA, the controller logic unit can realize copy, compression and erasure functions in a conversion state.
The invention also provides a method for realizing the method, in the method, 5 equipment groups, dgroup0, dgroup1, dgroup2, dgroup3, dgroup4 are designed, dgroup0 is used for the LUN controlled by Active/Standby, dgroup1 and dgroup2 are used for the IPLUN controlled by Active/Active, dgroup3 and dgroup4 are used for the FCLUN controlled by Active/Active, the state information of the two controller destination port groups is kept consistent, the initiator side inquires the port group state through SPC-3ALUA SCSI instruction, wherein the port state in tgroup1 of dgroup0 is determined according to the A controller attribute, the port state in tgroup2 is determined according to the B controller attribute, if the controller attribute is TER, the port group state in the corresponding group is Active/Active, and if the controller attribute is SLAVE, the port group in the group is MASS.
The invention also provides application of the method in the technical field of computer storage.
(III) beneficial effects
According to the asynchronous logic unit access mode provided by the invention, two controllers can respectively access different logic units to realize double control and double activity. The two controllers do not need to negotiate the access control to the same logic unit through communication, but distribute the load balance of the host on the two controllers through the configuration of the target port, so that the control method is an out-of-band control mode. Compared with the synchronous logic unit access mode, the asynchronous logic unit access mode can obviously reduce the communication overhead among controllers, obviously improve the logic unit access efficiency and improve the access performance of the logic unit.
Drawings
FIG. 1 is a flow chart of a method according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a code playback step in an embodiment of the present invention.
Detailed Description
For the purposes of clarity, content, and advantages of the present invention, a detailed description of the embodiments of the present invention will be described in detail below with reference to the drawings and examples.
The invention provides an asynchronous logic unit access control method, which realizes double control and double activation of a logic unit and fault takeover through two implementation modes.
In the access method of the double-control storage array asynchronous logic unit, for the logic unit which does not need state transition and is in a ready state during fault transition, an ALUA-based Active/Active mode implementation mode is adopted for access control; for a logic unit which needs a certain failover time and realizes Active/Standby switching in the class of the failover time, an ALUA-based Active/Standby implementation mode is adopted for access control.
The method for controlling the access by adopting the implementation mode of the Active/Active mode based on ALUA specifically comprises the following steps:
a. initializing a device group: and establishing equipment groups, setting two target groups for each equipment group, classifying the target ports of the controller 1 into the target groups 1, and classifying the target ports of the controller 2 into the target groups 2. At the same time, the ALUA state in the target group1 of the device group1 is set to the active state, and the ALUA state in the target group2 of the device group1 is set to the standby state. The ALUA state in the target group1 in the device group2 is set to the standby state, and the ALUA state in the target group2 in the device group2 is set to the active state. Wherein the device group1 is arranged with the logic unit device taking the controller 1 as the owner, and the device group2 is arranged with the logic unit device taking the controller 2 as the owner
b. Logic unit allocation: when the logic unit is allocated, the device is first established and mapped to the designated target port. There are two ways in which the logical unit owner controller may be specified.
Method 1: the owner with odd logical unit number is designated as a controller 1, the equipment corresponding to the logical unit is placed in the equipment group1, the owner with even logical unit number is designated as a controller 2, and the equipment corresponding to the logical unit is placed in the equipment group 2.
Method 2: determining a logical unit owner according to the input parameter, wherein the input ALUA owner parameter is 1, putting the corresponding equipment of the logical unit into the equipment group1, and if the input ALUA owner parameter is 2, putting the corresponding equipment of the logical unit into the equipment group 2.
c. The host initiating terminal obtains port information: the initiating terminal obtains the grouping information of the two controllers through the GET ALUASTATE command, and the grouping information of the two controllers is kept consistent. Namely, the target port group1 in the device group1 is in the active mode, and the target port group2 is in the standby mode. The destination port group1 in the device group2 is in a standby state, and the destination port group2 is in an active state.
d. Path failover: and the host multipath program calculates the priority of each controller path according to the ALUA state, accesses the active state path preferentially, accesses the standby state path according to a preset strategy when the priority path fails, and simultaneously sends out an SETALUASTATE command to the path target port to promote the path target port state to be active.
The access control by adopting an ALUA-based Active/Standby implementation mode specifically comprises the following steps:
a. initializing a device group: and establishing a device group, setting a device group, wherein the device group is provided with 2 target groups, the target group1 is a target port on the controller 1, and the target group2 is a target port on the controller 2. The ALUA status of the target group in the device group is determined according to the attribute of the controller. The controller 1 is a main controller, and then the ALUA state of the target group1 is active, and the ALUA state of the target group2 is standby; the controller 2 is the main controller, and the ALUA state of the target group1 is standby, and the ALUA state of the target group2 is active.
b. Logic unit allocation: during logic unit allocation, designating the logic unit equipment to be allocated to the equipment group initialized in the step a;
c. the host initiating terminal obtains port information: the initiating terminal obtains the grouping information of the two controllers through the GET ALUASTATE command, and the grouping information of the two controllers is kept consistent. That is, if the controller 1 is the main controller, the target group1 is in an active state, the target group2 is in a standby state, and if the controller 2 is the main controller, the target group1 is in a standby state, and the target group2 is in an active state.
d. Path failover: and the host multipath program calculates the priority of each controller path according to the ALUA state, and preferentially accesses the active state path. When the priority path fails, the other controller converts the ALUA state of the corresponding target group into a transitioning state, executes a state conversion program, sets the target group state to be an active state after completion, and accesses the path after the host multipath program detects that the path state of the other controller is the active state, thereby completing the failover.
In the first implementation manner, that is, the implementation manner of the Active/Active mode based on ALUA, the logic unit does not need state transition, and is in a ready state when in fault transition, the logic unit adopts an Active/Active access manner, which is an Active state transition manner, the host detects port information in real time through a getaluast command, when a certain port cannot acquire the state information, the host marks the path state as fail, and sets the other target port as Active through a setaluast command, so that seamless switching of the IO access of the logic unit of the controller is realized, the upper layer application has no perception, and the service has no influence.
In the second implementation manner, that is, the implementation manner of Active/Standby based on ALUA, the logic unit needs a certain failover time, in the failover time, the Standby controller can realize state switching, become the main controller, realize failover, and the logic unit adopts the implementation manner of Active/Standby, which is a passive state switching, and the controller logic unit can perform preparation work including configuration, cache recovery and the like in the switching state, so that advanced functions of copying, compression, deleting and the like can be realized.
In the actual implementation process, 5 device groups, dgroup0, dgroup1, dgroup2, dgroup3, dgroup4, and five device groups, dgroup0 is used for Active/Standby control LUN, dgroup1 and dgroup2 are used for Active/Active control IPLUN, dgroup3 and dgroup4 are used for Active/Active control FCLUN, and the state information of the destination port groups of the two controllers are kept consistent. The initiator side queries the port group status via SPC-3ALUA SCSI instructions. Wherein port states in the tgroup1 of the dgroup0 are determined according to the a controller attribute, and port states in the tgroup2 are determined according to the B controller attribute. If the controller attribute is MASTER, the port group status in the corresponding group is Active, and if the controller attribute is SLAVE, the port group status in the group is standby.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (7)
1. A double-control storage array asynchronous logic unit access method is characterized in that in the method, an ALUA-based Active/Active mode implementation mode is adopted for access control of a logic unit which is in a ready state when in fault transfer without state conversion; for the logic unit which needs the failover time and realizes the primary-Standby switching in the failover time, an ALUA-based Active/Standby implementation mode is adopted for access control;
in the method, the access control by adopting an ALUA-based Active/Active mode implementation mode specifically comprises the following steps:
a. initializing a device group: setting up a device group, setting two device groups, setting up two target groups for each device group, classifying target ports of a first controller into the first target group, classifying target ports of a second controller into the second target group, setting ALUA states in the first target group of the first device group as active states, setting ALUA states in the second target group of the first device group as standby states, setting ALUA states in the first target group of the second device group as standby states, setting ALUA states in the second target group of the second device group as active states, wherein the first device group is classified into logic unit devices with the first controller as an owner, and the second device group is classified into logic unit devices with the second controller as the owner;
b. logic unit allocation: when the logic unit is allocated, firstly, the equipment is established and mapped to the appointed target port, and the logic unit owner controller is appointed by one of the following two modes:
method 1: designating the odd-numbered owners of the logic units as a first controller, placing the corresponding devices of the logic units into a first device group, designating the even-numbered owners of the logic units as a second controller, and placing the corresponding devices of the logic units into a second device group;
method 2: determining a logic unit owner according to the input parameter, wherein the input ALUA owner parameter is 1, putting the corresponding equipment of the logic unit into a first equipment group, and if the input ALUA owner parameter is 2, putting the corresponding equipment of the logic unit into a second equipment group;
c. the host initiating terminal obtains port information: the method comprises the steps that an initiating terminal obtains grouping information of two controllers through a GET ALUASTATE command, and the grouping information of the two controllers is kept consistent, namely, a target port group1 in a first equipment group is in an active mode, a target port group2 is in a standby mode, a target port group1 in a second equipment group is in a standby state, and the target port group2 is in an active state;
d. path failover: the host multipath program calculates the path priority of each controller according to the ALUA state, accesses the active state path preferentially, accesses the standby state path according to a preset strategy when the priority path fails, and simultaneously sends an SETALUASTATE command to the path target port to promote the path target port state to be active;
in the method, the access control by adopting an ALUA-based Active/Standby implementation mode specifically comprises the following steps:
a. initializing a device group: setting up a device group, setting up2 target groups, wherein the first target group is a target port on a first controller, the second target group is a target port on a second controller, the ALUA state of the target groups in the device group is determined according to the attribute of the controllers, the first controller is a main controller, the ALUA state of the first target group is active, and the ALUA state of the second target group is standby; the second controller is a main controller, and the ALUA state of the first target group is standby, and the ALUA state of the second target group is active;
b. logic unit allocation: during logic unit allocation, designating the logic unit equipment to be allocated to the equipment group initialized in the step a;
c. the host initiating terminal obtains port information: the method comprises the steps that an initiating terminal obtains grouping information of two controllers through a GET ALUASTATE command, the grouping information of the two controllers is kept consistent, namely, if a first controller is a main controller, a first target group is in an active state, a second target group is in a standby state, and if the second controller is the main controller, the first target group is in the standby state, and the second target group is in the active state;
d. path failover: the host multipath program calculates the path priority of each controller according to the ALUA state, accesses the active state path preferentially, when the priority path fails, the other controller converts the ALUA state of the corresponding target group into a transiting state, executes the state conversion program, sets the target group state as the active state after the completion, and accesses the path after the host multipath program detects that the path state of the other controller is the active state, thereby completing the failover;
in the method, 5 equipment groups, dgroup0, dgroup1, dgroup2, dgroup3, dgroup4, and five equipment groups, dgroup0 is used for Active/Standby control LUNs, dgroup1 and dgroup2 are used for Active/Active control IPLUNs, dgroup3 and dgroup4 are used for Active/Active control FCLUNs, state information of two controller destination port groups is kept consistent, an initiator side inquires port group states through SPC-3ALUA SCSI instructions, port states in a tgroup1 of the dgroup0 are determined according to A controller attributes, port states in a tgroup2 are determined according to B controller attributes, if the controller attributes are MASTER, port group states in the corresponding groups are Active/Active control FCLUNs, and if the controller attributes are SLAVE, port group states in the groups are Standby.
2. The method of claim 1, wherein the ALUA-based Active/Active mode implementation is an Active state transition.
3. The method of claim 2, wherein in the implementation of Active/Active mode based on ALUA, the host detects port information in real time through a getaluast command, when the port does not acquire state information, the host marks the path state as fail, and sets another target port as Active through a setaluast command, so as to realize seamless switching of IO access of the controller logic unit, and no perception is applied to an upper layer.
4. The method of claim 1, wherein the ALUA-based Active/Standby implementation is a passive state transition.
5. The method of claim 4, wherein in an ALUA-based Active/Standby implementation, the controller logic unit prepares in a transition state, including configuration and cache restoration.
6. The method of claim 4, wherein in the ALUA-based Active/Standby implementation, the controller logic implements copy, compress, and deduplication functions in a transition state.
7. Use of the method according to any one of claims 1 to 6 in the field of computer storage technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010804112.8A CN111930312B (en) | 2020-08-12 | 2020-08-12 | Dual-control storage array asynchronous logic unit access method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010804112.8A CN111930312B (en) | 2020-08-12 | 2020-08-12 | Dual-control storage array asynchronous logic unit access method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111930312A CN111930312A (en) | 2020-11-13 |
| CN111930312B true CN111930312B (en) | 2023-10-20 |
Family
ID=73312144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010804112.8A Active CN111930312B (en) | 2020-08-12 | 2020-08-12 | Dual-control storage array asynchronous logic unit access method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111930312B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102567248A (en) * | 2010-12-31 | 2012-07-11 | 中国航空工业集团公司第六三一研究所 | Control circuit and method for avoiding access conflict of dual-port memory |
| CN103329106A (en) * | 2010-11-12 | 2013-09-25 | 赛门铁克公司 | Detection and handling of ALUA preferences and state transitions by host |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9021232B2 (en) * | 2011-06-30 | 2015-04-28 | Infinidat Ltd. | Multipath storage system and method of operating thereof |
| CN104991874B (en) * | 2015-07-22 | 2018-02-06 | 浪潮(北京)电子信息产业有限公司 | A kind of multi-controller storage device ALUA collocation methods based on SCST |
| US20190235959A1 (en) * | 2018-01-30 | 2019-08-01 | International Business Machines Corporation | Proactive Node Preference Changing in a Storage Controller |
| JP6814764B2 (en) * | 2018-04-06 | 2021-01-20 | 株式会社日立製作所 | Information processing system and path management method |
-
2020
- 2020-08-12 CN CN202010804112.8A patent/CN111930312B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103329106A (en) * | 2010-11-12 | 2013-09-25 | 赛门铁克公司 | Detection and handling of ALUA preferences and state transitions by host |
| CN102567248A (en) * | 2010-12-31 | 2012-07-11 | 中国航空工业集团公司第六三一研究所 | Control circuit and method for avoiding access conflict of dual-port memory |
Non-Patent Citations (3)
| Title |
|---|
| "Virtual Redundancy for Active-Standby Cloud Applications";Gueyoung Jung 等;《IEEE》;第1916-1924页 * |
| "基于ALUA的多路径存储系统";范长军 等;《计算机系统应用》;第26卷(第10期);第11-19页 * |
| "浪潮双控制器存储服务器缓存模块设计与实现";孙冰勇;《中国优秀硕士学位论文全文数据库(信息科技辑)》(第2017年第01期);第I137-23页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111930312A (en) | 2020-11-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4041656B2 (en) | Storage system and data transmission / reception method in storage system | |
| US7707186B2 (en) | Method and apparatus for data set migration | |
| US8639898B2 (en) | Storage apparatus and data copy method | |
| US9367245B2 (en) | Data access request monitoring to reduce system resource use for background operations | |
| US8307186B2 (en) | Computer system performing capacity virtualization based on thin provisioning technology in both storage system and server computer | |
| US8452923B2 (en) | Storage system and management method thereof | |
| US20110191537A1 (en) | Storage controller and virtual volume control method | |
| US9213500B2 (en) | Data processing method and device | |
| US20080177947A1 (en) | Storage system and storage migration method | |
| CN103049220B (en) | Storage controlling method, memory control device and solid-state memory system | |
| US7529887B1 (en) | Methods, systems, and computer program products for postponing bitmap transfers and eliminating configuration information transfers during trespass operations in a disk array environment | |
| US7730252B2 (en) | Method, apparatus and system for serial attached SCSI (SAS) zoning management of a domain using connector grouping | |
| JP2003162377A (en) | Disk array system and method for taking over logical unit among controllers | |
| US20080104321A1 (en) | Fast write operations to a mirrored volume in a volume manager | |
| CN109582495A (en) | Bidirectional replication | |
| CN102868727B (en) | Method for realizing high availability of logical volume | |
| US7568069B2 (en) | Method for creating a large-scale storage array system out of multiple mid-range storage arrays | |
| CN105281949B (en) | Mix the partition method and isolating device of host in memory module | |
| TW201432474A (en) | Application server to NVRAM path | |
| EP2495648A2 (en) | Improving network efficiency for continuous remote copy | |
| CN106888116B (en) | Scheduling method of double-controller cluster shared resources | |
| WO2014061054A1 (en) | Storage system and method of controlling storage system | |
| CN111930312B (en) | Dual-control storage array asynchronous logic unit access method | |
| CN102708075A (en) | Secure digital (SD) memory card hardware control device and control method | |
| CN106980556A (en) | A kind of method and device of data backup |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |