CN102215245A - Configuration information synchronization method of dual-controller of storage area network - Google Patents
Configuration information synchronization method of dual-controller of storage area network Download PDFInfo
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- CN102215245A CN102215245A CN2010101516974A CN201010151697A CN102215245A CN 102215245 A CN102215245 A CN 102215245A CN 2010101516974 A CN2010101516974 A CN 2010101516974A CN 201010151697 A CN201010151697 A CN 201010151697A CN 102215245 A CN102215245 A CN 102215245A
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Abstract
The invention relates to a configuration information synchronization method of a dual-controller of a storage area network, which is applicable to the storage area network comprising a first controller and a second controller. The configuration information synchronization method of the dual-controller of the storage area network comprises: receiving a configuration updating requirement by the first controller; confirming survival of the second controller; backing up the original configuration information of the first controller; updating the configuration information of the first controller according to the configuration updating requirement; updating the configuration information of the second controller according to the configuration updating requirement when the configuration information of the first controller is updated successfully; and sending successful configuration signals when the configuration information of the second controller is updated successfully.
Description
Technical field
The present invention relates to a kind of configuration information method for synchronous, particularly a kind of configuration information method for synchronous that stores the dual controller of LAN.
Background technology
Along with development in science and technology, the quantity of digital information and e-file has fulminant growth in recent years, also causes the problem that has produced the required storage area deficiency of user.Especially deposit multimedia server or commercial server etc., be starved of and have big capacity and storage device that can zero access.Yet (Small Computer System Interface, technology SCS1) is quantitatively all applied at transmission speed, transmission range and the device that can use simultaneously and is used to use the slim calculator system interface of parallel winding displacement traditionally.In addition, traditional server and the connected mode between the storage device also are difficult to make a plurality of servers to share storage device and lack flexibility.
For the storage device that greater room can be arranged and the elasticity and the reliability of accessing storing device, develop then and storage LAN (Storage Area Network, technology SAN).Provide the service that stores with the management of backup and store the most normal being used to of LAN for enterprise commerce data or operation business data.Store LAN and can allow server, and storage device can be cut apart to a plurality of different users (server) and used at high speed with data block (block) level access storage device.Further, store LAN and the network storage, high availability database cluster, high-performance calculation, data backup can be provided, duplicate, various services such as disaster tolerance, migration.
Need manage huge data and provide service to server yet store LAN, traditional controller is not sufficient to corresponding heavy data processing amount.This has been produced the framework of dual controller (dual controller).The framework of so-called dual controller promptly is the system that possesses two controllers, and each controller can include processor, memory body or the network interface card of oneself.Dual controller is realized the interconnected communication of high speed between two controllers, the system that makes shares burden required when managing the storage LAN effectively, and (High availability, mode HA) significantly improves the reliability of system can to make high availability in fact.
The system of dual controller has configuration information, and wherein configuration information has been described the configuration status that storage device is assigned to each server.In case the configuration information of two controllers is inconsistent, may cause server to read data wrong in the storage device; And data may be deleted by mistake, and can't allow server normally use.Severe patient more, if the content false of configuration information even lost, the system of whole storage LAN will produce critical mistake.Therefore, consistency can be preserved and have to configuration information how to guarantee to store the double-controller system of LAN and synchronism is an important problem.
Summary of the invention
For addressing the above problem, the invention provides a kind of storage LAN (Storage Area Network, the configuration information of dual controller SAN) (configuration information) method for synchronous, it is applicable to that having one of one first controller and one second controller stores LAN.The method for synchronous of the configuration information of the dual controller of storage LAN comprises: receive the config update requirement with first controller; Confirm the survival of second controller; Back up an original configuration information of first controller; According to the config update requirement, upgrade the configuration information of first controller; When the configuration information update of first controller is successful,, upgrade the configuration information of second controller according to the config update requirement; And when the configuration information update of second controller is successful, send a configuration successful signal.
Wherein config update requires can be a newly-increased requirement, and revises a requirement or an erasure request.
The method for synchronous of the configuration information of the dual controller of storage LAN also can comprise: when the configuration information update of second controller is successful, delete the configuration information of the backup of first controller.
The method for synchronous of the configuration information of the dual controller of storage LAN also can comprise: when the configuration information update of first controller is failed, carry out following steps.According to the configuration information of the backup of first controller, reduce the configuration information of first controller; And send a configuration failure signal.
According to an enforcement example of the present invention, wherein before the step of ", upgrading the configuration information of second controller ", also can comprise: the original configuration information that backs up second controller according to the config update requirement.
Hold, the method for synchronous of the configuration information of the dual controller of storage LAN also can comprise: when the configuration information update of second controller is successful, delete the configuration information of the backup of second controller.
And the method for synchronous of the configuration information of the dual controller of storage LAN also can comprise: when the configuration information update of second controller is failed, carry out following steps.According to this configuration information of the backup of first controller, reduce the configuration information of first controller; According to this configuration information of the backup of second controller, reduce the configuration information of second controller; And send the configuration failure signal.
Implement example according to of the present invention another, wherein config update requires to be placed into a first-in first-out buffer, to upgrade the configuration information of first controller in regular turn.
In sum, the configuration information method for synchronous that stores the dual controller of LAN disposes respectively the configuration information that first controller and second controller are upgraded in more new demand according to individual, so that the configuration information of two controllers is synchronous.And store LAN dual controller the configuration information method for synchronous and can back up and reduce configuration information, can when making a mistake, recover original configuration information.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Figure 1A is the block diagram of the storage LAN of one enforcement example according to the present invention;
Figure 1B is another block diagram of implementing the storage LAN of example according to the present invention;
Fig. 2 is the flow chart of the configuration information method for synchronous of the dual controller of the storage LAN of one enforcement example according to the present invention;
Fig. 3 A is the part flow chart of the configuration information method for synchronous of the dual controller of another storage LAN of implementing example according to the present invention;
Fig. 3 B is the part flow chart of the configuration information method for synchronous of the dual controller of another storage LAN of implementing example according to the present invention; And
Fig. 4 is the block diagram of the first-in first-out buffer of one enforcement example according to the present invention.
Wherein, Reference numeral
10 store LAN
12 servers
14 first controllers
16 second controllers
18 storage devices
20 user sides
30 first-in first-out buffers
32 config update requirements
Embodiment
Below in execution mode, be described in detail detailed features of the present invention and advantage, its content is enough to make any those skilled in the art to understand technology contents of the present invention and implements according to this, and according to the disclosed content of this specification, claim scope and graphic, any those skilled in the art can understand purpose and the advantage that the present invention is correlated with easily.
The invention provides a kind of storage LAN (Storage Area Network, the configuration information of dual controller SAN) (configuration information) method for synchronous, it is applicable to that having one of one first controller and one second controller stores LAN.
Please refer to Figure 1A, it is the block diagram for the storage LAN of one enforcement example according to the present invention.
At least one user side 20 can pass through internet Wide Area Networks such as (Internet), and (Wide Area Network WAN) is connected at least one server 12 of SAN 10.SAN 10 interior also comprises first controller 14, second controller 16 and a storage device 18.User side 20 is by internet and SAN 10 enough accessing storing devices 18, and the storage device 18 that is connected to server 12 is considered as direct connection by user side 20.For instance, for user side 20, storage device 18 similarly is the hard disk that server 12 itself is had.And in fact, server 12 is one and internal network accessing storing devices 18 by first controller 14 and second controller 16.
Wherein SAN 10 is a kind of framework with internal network Connection Service device 12 and storage device 18, makes that server 12 can be at high speed with data block (block) level access storage device 18.Server 12 can for example be the file server of e-mail server, database, high usage.And storage device 18 can be single storage facilities, also the set that a plurality of storage facilitiess is coupled together.For example storage device 18 can be disk array (Redundant Array of Independent Disks, RAID) or optical recording storehouse (Optical jukebox is called the CD cabinet again).Between a plurality of storage devices 18 then available fiber channel modes such as (fiber channel) link together.
Among the SAN 10, server 12 is connected to storage device 18 by internal network; Wherein internal network needs to support the storage communications protocol that SAN 10 is adopted.Fibre channel protocol (Fibre ChannelProtocol for example, FCP) or internet small computer system interface (Internet Small ComputerSystem Interface, iSCSI is called IP-SAN again) be the communications protocol that common SAN 10 is suitable for.
16 of first controller 14 and second controllers Ji Lu not have a configuration information, to preserve the situation that storage device 18 is configured.For example, storage device 18 can be an entity hard disk, and is divided into a plurality of virtual hard disks for user side 20 uses in response to the requirement of server 12.Then the content of configuration information can comprise each virtual hard disk itself in the storage device 18 relevant information, with the information of virtual hard disk corresponding server 12 or user side 20 or with virtual hard disk in the relevant information of file deposited.In more detail, configuration information can comprise the IP address of the internet communication protocol address (Internet Protocol Address, IP address) of title, the corresponding server 12 of the title of hard disk title, hard disk size, spendable remaining space, corresponding server 12, corresponding user side 20, corresponding user side 20 or the quantity of documents of storage.
When server 12 needed the configuration of change storage device 18, server 12 sent a config update requirement.Wherein config update requires to comprise that a newly-increased requirement, a modification require or an erasure request.With above-mentioned storage device 18 is divided into the example of a plurality of virtual hard disks, server 12 can require to cut apart the virtual hard disk that makes new advances, revise the hard disk size of original virtual hard disk or delete original virtual hard disk by config update from storage device 18.
In this enforcement example, the dual controller of SAN 10 (i.e. first controller 14 and second controller 16) can put 12 to service simultaneously provides service.First controller 14 and second controller 16 are accepted the config update requirement of 12 pairs of storage devices 18 of server simultaneously, and require requirement and the renewal configuration information of renewal to storage device 18 according to config update.That is to say that first controller 14 and second controller 16 are to dispose abreast and accessing storing device 18.
Please be simultaneously with reference to Figure 1B, it is for another implements the block diagram of the storage LAN of example according to the present invention.
Different with the enforcement example of Figure 1A be in, first controller 14 in this enforcement example and second controller 16 are not to provide service to server 12 simultaneously.For instance, first controller 14 and second controller 16 can be a master-slave mode (master-slave) framework.The config update requirement that SAN 10 China National Instruments Import ﹠ Export Corporations are accepted with first controller 14 and processing server 12 is sent, and with the controller of second controller 16 as backup usefulness.When first controller 14 takes place that deadlock wait graunches and can't normal operation the time, just switches second controller 16 and replace first controller 14 that service is provided, to reach high availability (Highavailability, HA) service characteristic such as grade.
Then please refer to Fig. 2, it is the flow chart for the configuration information method for synchronous of the dual controller of the storage LAN of one enforcement example according to the present invention.
At first the config update that is sent with first controller, 14 reception servers 12 requires (step S100), and first controller 14 confirms whether second controller 16 is in the state (step S101) of survival (alive, meaning is normal operation) again.Confirm second controller 16 for after the normal operation, backed up the original configuration information (step S102) of first controller 14 itself.That is to say that first controller 14 backs up existing configuration information.
Then, first controller 14 upgrades the configuration information (step S103) of first controller 14 according to the config update requirement.In more detail, first controller 14 is carried out the content that config update requires, and for example increases, modifies or deletes the virtual hard disk of storage device 18.And after storage device 18 configuration successfuls, the state of first controller, 14 execution in step S103 after with the configuration of corresponding storage device 18 that configuration information update is made.
When the configuration information update of first controller 14 is successful,, upgrade the configuration information (step S104) of second controller 16 according to the config update requirement.Since 14 executeds of first controller cross the config update requirement content, second controller 16 need not repeat config update, and can directly carry out step S104.At last, when the configuration information of second controller 16 also upgrades when successful, send a configuration successful signal (step S105) and give server 12 with repayment.The configuration successful signal for example can be passback value (return value), the parameter (parameter) that replies to a configurator of server 12 or interrupt (interrupt).
Carry out after the config update, the configuration information of first controller 14 and second controller 16 is all upgraded by correspondence.That is to say that the configuration information of dual controller is to be updated synchronously.Thus, just can guarantee the consistency of the configuration information of dual controller.Therefore for example meet accident and can't provide when serving when first controller 14, second controller 16 has known clearly all configuration states on the present storage device 18, and can directly take over the required responsible work of all dual controllers.Again for example when first controller 14 needs that because of load (load) is overweight the part job sharing given second controller 16, second controller 16 also can be directly handled the work that first controller 14 originally is responsible for according to the configuration information of self.
Please be simultaneously with reference to Fig. 3 A and Fig. 3 B, it is for another implements the flow chart of the configuration information method for synchronous of the dual controller of the storage LAN of example according to the present invention.
With Fig. 2 similarly, first controller 14 receives config updates and requires (step S110), and judges second controller 16 whether survive (step S111).First controller 14 is the original configuration information (step S112) of backup oneself then; Execution is to the config update of storage device 18; And upgrade the configuration information (step S113) of first controller 14.Upgraded after the configuration information of first controller 14, judged whether the configuration information update success (step S114) of first controller 14.When the configuration information update of first controller 14 is successful, can back up the original configuration information (step S115) of second controller 16 earlier, upgrade the configuration information (step S116) of second controller 16 again.
Then judge whether the configuration information update success (step S117) of second controller 16.When the configuration information update of second controller 16 was successful, second controller 16 can be repaid and give first controller 14, to delete the configuration information (step S118) of first controller 14 in the backup of step S112 generation.Second controller 16 and deletion oneself is in the configuration information (step S119) of the backup of step S115 generation.At last, when the configuration information of first controller 14 and second controller 16 all upgrades when successful, send configuration successful signal (S120)
Accept step S114, when the configuration information update of first controller 14 is failed, the own present configuration information (step S121) of configuration information reduction of the backup that first controller 14 produces according to step S112, and send a configuration failure signal (step S122).Like the configuration successful class signal, the configuration failure signal can be passback value, parameter or the interruption that replies to server 12.
Accept step S117,, but during the failure of the configuration information update of second controller 16, carry out following steps when the success of the configuration information update of first controller 14.At first according to this configuration information of the backup of first controller 14, reduce the configuration information (step S121) of first controller 14; And, reduce the configuration information (step S123) of second controller 16 according to this configuration information of the backup of second controller 16; Send configuration failure signal (step S122) again.
In brief, before the configuration information that upgrades first controller 14 or second controller 16, all can back up original configuration information, and reduction configuration when taking place to upgrade mistake according to this.And, all be considered as renewal failure at the integral body of this config update requirement if there is any generation in first controller 14 or second controller 16 to upgrade failure.In other words, only under all being updated the situation of success, the configuration information of dual controller just can send the configuration successful signal.
Please refer to Fig. 4, it is the block diagram for the first-in first-out buffer of one enforcement example according to the present invention.First controller 14 can be electrical connected in a first-in first-out buffer (First In First Out buffer, FIFO buffer) 30.Wherein first-in first-out buffer 30 also can be configured among first controller 14.
When first controller 14 is received a plurality of config update requirement 32, can require 32 put into first-in first-out buffer 30 these config updates earlier.First controller 14 requires 32 by taking out config update in the first-in first-out buffer 30 more one by one, to upgrade the configuration information of first controller 14 and second controller 16 in regular turn.
In sum, the configuration information method for synchronous that stores the dual controller of LAN requires 32 configuration informations that upgrade first controllers 14 and second controller 16 according to each config update, with the configuration information that reaches dual controller synchronously.And before upgrading configuration information, can be with original configuration information backup.Thus, not only can guarantee the consistency of the configuration information between dual controller, and can when the config update mistake takes place, recover original configuration information.
Also be applicable to the storage LAN that adopts multi-controller though it should be noted that the above-mentioned example of respectively implementing.Can upgrade storing all controllers in the LAN, to guarantee the consistency of the configuration information between these controllers according to each config update requirement.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (8)
1. configuration information method for synchronous that stores the dual controller of LAN, be applicable to that having one of one first controller and one second controller stores LAN, it is characterized in that the method for synchronous of the configuration information of the dual controller of this storage LAN comprises:
Receive a config update requirement with this first controller;
Confirm this second controller survival;
Back up an original configuration information of this first controller;
According to this config update requirement, upgrade this configuration information of this first controller;
When this configuration information update of this first controller is successful,, upgrade this configuration information of this second controller according to this config update requirement; And
When this configuration information update of this second controller is successful, send a configuration successful signal.
2. the configuration information method for synchronous of the dual controller of storage LAN according to claim 1 is characterized in that, also comprises:
When this configuration information update of this second controller is successful, delete this configuration information of the backup of this first controller.
3. the configuration information method for synchronous of the dual controller of storage LAN according to claim 1 is characterized in that, also comprises:
When this configuration information update of this first controller is failed, carry out following steps:
According to this configuration information of the backup of this first controller, reduce this configuration information of this first controller; And
Send a configuration failure signal.
4. the configuration information method for synchronous of the dual controller of storage LAN according to claim 1 is characterized in that, and is described according to this config update requirement, upgrades before the step of this configuration information of this second controller, also comprises:
Back up this original configuration information of this second controller.
5. the configuration information method for synchronous of the dual controller of storage LAN according to claim 4 is characterized in that, also comprises:
When this configuration information update of this second controller is successful, delete this configuration information of the backup of this second controller.
6. the configuration information method for synchronous of the dual controller of storage LAN according to claim 4 is characterized in that, comprising:
When this configuration information update of this second controller is failed, carry out following steps:
According to this configuration information of the backup of this first controller, reduce this configuration information of this first controller;
According to this configuration information of the backup of this second controller, reduce this configuration information of this second controller; And
Send this configuration failure signal.
7. the configuration information method for synchronous of the dual controller of storage LAN according to claim 1 is characterized in that, this config update requires to be placed into a first-in first-out buffer, to upgrade this configuration information of this first controller in regular turn.
8. the configuration information method for synchronous of the dual controller of storage LAN according to claim 1 is characterized in that, it is that a requirement or an erasure request are revised in a newly-increased requirement, that this config update requires.
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Application publication date: 20111012 |