CN106506588A - How polycentric data center's dual-active method and system - Google Patents
How polycentric data center's dual-active method and system Download PDFInfo
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- CN106506588A CN106506588A CN201610846533.0A CN201610846533A CN106506588A CN 106506588 A CN106506588 A CN 106506588A CN 201610846533 A CN201610846533 A CN 201610846533A CN 106506588 A CN106506588 A CN 106506588A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/27—Replication, distribution or synchronisation of data between databases or within a distributed database system; Distributed database system architectures therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
Abstract
How polycentric the present invention provide a kind of data center's dual-active method and system, including：For realizing data switching exchane that two layers of data center interconnects and realize OTV technology, for realizing that multiple data centers realize the intelligent DNS multi-site selector of load balancing by domain name access；For realizing the application load balancing device of multiple data centers application load balancing；For making the MDS fibre channel medias for realizing SAN extension storages between multiple data centers.
Description
Technical field
A kind of the invention belongs to field of information security technology, more particularly to how dual-active side of polycentric data center
Method and system.
Background technology
As information technology is widely being used, increasing significant data storage and place in the form of electronization
Reason, although and the storage of this data and processing mode can improve convenience, but easily lead to data and loss.Especially
It is that the data volume that system is produced is increasing with the sustainable operation of information system, therefore business datum safety, data is visited
Ask that performance etc. requires more and more higher.Wherein basis of the Database Systems as information technology, database safe and reliable even more whole
A very important link in individual information system；Mean that whole information system can all face if database failure to choose
War, so that bring serious loss and consequence.The master/slave data storehouse that widely used redundancy is arranged in prior art, with master data
Standby database is rapidly switched to when storehouse is broken down, to ensure the continuous firing of system.But the master that existing redundancy is arranged
Standby database is generally required for certain switching time, and may interrupt servicing in switching.
Content of the invention
For the problem that database redundancy technology of the prior art is present, the technical problem to be solved in the present invention is to provide
How polycentric a kind of effective and efficient data center's dual-active method and system, to improve the reliability of database.
In order to solve the above problems, how the embodiment of the present invention proposes one kind polycentric data center's dual-active system,
Including：
For realizing data switching exchane that two layers of data center interconnects and realize OTV technology, for realizing multiple data centers
The intelligent DNS multi-site selector that load balancing is realized by domain name access；For realizing multiple data centers application load balancing
Application load balancing device；For making the MDS fibre channel medias for realizing SAN extension storages between multiple data centers；
Wherein described data switching exchane connects each data center to realize two layers of interconnection, and realizes meter based on OTV technology
Calculate free-flowing of the resource in different pieces of information in the heart；
Wherein each data center of intelligent DNS multi-site selector connection is multiple to realize when user is by domain name access
The load balancing of data center；
Wherein described application load balancing device connects each data center, and the server load to dispose in data center
The perception across data center is carried out centered on balancing equipment, will be real for the virtual computing platforms linkage that disposes in multiple data centers
Now the computing capability across data center is dispatched；
Wherein MDS fibre channel medias are used for realizing SAN extension storages technology to realize same city disaster-tolerant backup or long-range
Disaster-tolerant backup；It is to pass through and using CWDM or DWDM wavelength division multiplex schemes between multiple data centers wherein with city disaster-tolerant backup
Bare fibre is connected with each other；Remote disaster tolerance backup is interconnected by FCIP technology between multiple data centers.
Wherein, also include that, for controlling the data synchronizing unit of multiple data center's data syn-chronizations, the data synchronizing unit is adopted
The data syn-chronization that multiple data centers are realized with data duplicates technology or asynchronous data replication technology.
Wherein, wherein described application load balancing device connects each data center, is provided with virtual clothes in each data center
Device be engaged in connect the application load balancing device, so that the application load balancing device knows the load parameter of the data center.
Meanwhile, the embodiment of the present invention also proposed a kind of manyly polycentric data center using as described in front any one
The method of dual-active system, including：
Multiple data centers are carried out two layers of interconnection by data switching exchane, and realizes that computing resource exists based on OTV technology
Free-flowing in different pieces of information in the heart；
Multiple data centers are all connected to intelligent DNS multi-site selector, to connect each data center with user
The load balancing of multiple data centers is realized during by domain name；
Multiple data centers are all connected to application load balancing device, and equal with the server load that disposes in data center
The perception across data center is carried out centered on weighing apparatus equipment, the virtual computing platforms linkage that disposes in multiple data centers is realized
Dispatch across the computing capability of data center；
To be realized with realizing directly or indirectly through the connection of MDS fibre channel medias between multiple data centers
SAN extension storages technology is backed up with realizing same city disaster-tolerant backup or remote disaster tolerance；It is in multiple data wherein with city disaster-tolerant backup
Between the heart by and bare fibre using CWDM or DWDM wavelength division multiplex schemes be connected with each other；Remote disaster tolerance backup is multiple data
Interconnected by FCIP technology between center.
The above-mentioned technical proposal of the present invention has the beneficial effect that：Above-mentioned technical scheme compare prior art have with
Lower advantage：Technical scheme, is on the premise of data safety is ensured to make full use of resource, it is to avoid one or more
Cause to waste in idle state throughout the year at preliminary data center；And the service of " dual-active " data center is caused by resource consolidation
Capability improving is double.And when any data center breaks down, other data centers still can separate responses business,
For user, business switching is unaware.
Description of the drawings
Two places three center dual-active data center overall construction drawings of the Fig. 1 for the embodiment of the present invention.
Specific embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
In order to reduce the time interval switched between master/slave data storehouse, the embodiment of the present invention proposes one kind many ground multicenter
Data center's dual-active method and system, which ensure that multiple data centers while online so that protect at available data center
Resource is made full use of on the premise of barrier data safety, it is to avoid data center causes to waste in idle state throughout the year.
" dual-active " data center in the embodiment of the present invention, refers to and is different from a data center, a Disaster Preparation Center
Pattern." dual-active " data center in the embodiment of the present invention, refers to that at least Liang Ge data centers are all in the middle of operation and mutual
For backing up, so being referred to as " dual-active ".Prior art is different from, is only had in two or more data centers in prior art
One is in running status, and other data centers are in off position；Only when a disaster occurs, in active data
When the heart occurs paralysis, preliminary data center just starts.It is double that " dual-active " in the embodiment of the present invention refers to that multiple data centers have
Service ability, when a data center breaks down other data centers still can separate responses business, business for user
Switching is unaware.Therefore how polycentric data center's dual-active to be not limited to only Liang Ge data centers online, and
Refer to that a minimum of Liang Ge data centers are online.
Realize in the embodiment of the present invention that " dual-active " is to rely on：
1st, network dual-active：Same network is expanded to multiple data centers, and realizes the virtuality of server and application
Change data center's interconnection technique：With High Availabitity remote cluster technology and virtual machine migration technology in data center's disaster tolerance and
Extensive application in terms of computing resource allotment, needs big double layer network connection between data center.
2nd, dual-active is stored：This is a kind of memory technology, and it is common inside data center and between data center to enable information
Enjoy, access or mobile, become single resource so as to combine a variety of storage systems.It allows to be located at and is geographically separated station
The storage system of point carries out data access simultaneously, transparent to client, and ensure that the reliabilty and availability of data.
3rd, database dual-active：Refer to that two Database Systems can be in the case where being separated by far while operation, support phase
Same application load, and the opposing party's (minute level) can be rapidly switched to when a side is broken down, it is ensured that business High Availabitity
Property.
4th, dual-active is applied：Fully redundance is achieved in application process aspect, and transaction is routed automatically to not by load balancing
Same application server, but, some database is still relied in database aspect.
Hereinafter simply introduce the technology involved by the embodiment of the present invention simply to be introduced：
1st, multiple data centers path optimization：
The GSLB (Global Server Load Balance, GSLB) redirected using DNS, to pass through intelligence
Energy DNS technology realizes load balancing between multiple data centers.Due to being DNS redirecting techniques, therefore all to data in
The access of the heart must be the access based on domain name.
Health route injection (Route Health Injection, RHI) of data center's dual-active can also be realized.RHI
It is a kind of mechanism of permission Liang Ge data centers using same IP address, that is, means same IP address (main frame road
Footpath) it is distributed for different metric.Upstream router can simultaneously view two paths, and more preferable for metric path is inserted
Enter in its routing table.When equipment enables RHI, it will be injected into static path in the routing table of equipment when VIP is available；
When VIP fails, the static path will be deleted.If equipment there occurs failure, another paths that upstream router is used will
Server is reached, so as to realize high availability.This RHI mechanism is applied to the application accessed by IP, realizes that the calamity of application is standby.
LISP (Locator-ID Separation Protocol, address (ADDR separated network agreement) is will to identify Locator
IP (RLOC) and the IP (EID) of recognition purpose node ID make a distinction and be superimposed encapsulation, a basis when public network is transmitted
Peeling outer layer IP is just understood when Locator IP forwardings, only destination point edge, and the IP for identifying EID using internal layer is forwarded.
Network Recognition can be allowed to apply the flowing between different pieces of information center, it is adaptable to virtualization applications.
2nd, dual-active data-center applications network：
Application network is arranged；Same network is expanded to multiple data centers, and realizes the void of server and application
Planization；
Data center interconnects：Existing data center generally using three layers of internet topology, is generally used for link backup
And storage replication.As High Availabitity remote cluster technology and virtual machine migration technology in data center's disaster tolerance and calculate money
Extensive application in terms of the allotment of source, needs big double layer network connection, major technique to adopt OTV (Overlay between data center
Virtualization Transport) realize that big two layers of multiple data centers interconnect.
Server load balancing：Equilibrium is carried out for the load to accessing data center's server to divide in other words
Load.In the construction of multiple data centers, need to possess the linkage ability with wide area load allocating system, and support empty with server
The integration of planization：That is the how position of aware application server, CPU, memory usage, can be with OTV technology and virtualization skill
Art is combined, and realizes applying the drift between multiple data centers.
Intel Virtualization Technology, is conducive to integral data central server (virtual machine), with improve computing resource utilization rate and
Improve load mobility, significant to business continuance.
3rd, dual-active data center data syn-chronization：
Storage replication：Application is provided for locally stored effective access, and solves remotely to be counted between data center
According to synchronous problem.Existing Data Replication Technology in Mobile includes data duplicates technology and asynchronous data replication technology.Wherein；
Data duplicates technology：For writing storage in real time to multiple data centers；Apart from severely limited；It is based on
The mirror image (i.e.Veritas Volume Replicator) of main frame or the mirror image based on disk (i.e.IBM PPRC,
EMCSRDF/S,HDSTrueCopy,HP DRM)；Need big bandwidth, the network of low delay.
Asynchronous data replication technology：For multiple data centers are carried out with periodic data image synchronization；Substantially do not have
Distance is limited；It is based on IBM PPRC-XD (non synchronous), IBM XRC, EMC SRDF/A, HDSTrueCopy, HP/
Compaq DRM can be realized；Due to network factors, the risk of loss of data is brought.
Below many polycentric data center's dual-active method and systems of the embodiment of the present invention are described in detail.
Manyly polycentric data center's dual-active scheme of the embodiment of the present invention, using following hardware setting：NEXUS
7000 series of switch；Intelligent DNS multi-site selector；Application load balancing device；MDS fibre channel medias.
Wherein 7000 switches of NEXUS are used for realizing data center virtualization interconnection technique OTV.In the embodiment of the present invention
One large-scale Visualized data centre network can be built by technology such as FabricPath.Limit due to power supply refrigeration
System, disaster-tolerant backup etc. require, can be physically separated whole Visualized data centre network struction into one, one in logic
The network across data center, set up the data center of distributed virtualization based on this network.By this network, calculate
Ability can be flowed freely between different data centers；Only the network of a data center is extended to far by technology
The data center at end, could realize such business demand.OTV (Overlay Transport Virtualization) is exactly
Such a technology, can realize passing through getting through for the key data center networks of IP by OTV technology.OTV technology is borrowed
The Frame encapsulation of a part of EoMPLSoGRE, when employing diverse control plane.Set up by ISIS
Mac address table between Adjacency relations, and exchange data center.OTV technology is that IP can for the requirement of IP backbone
Reach, it is not necessary to the support of MPLS, enormously simplify the maintenance of network.Simultaneously because employ control plane and Forwarding plane point
From, effectively prevent L 2 broadcast to spread unchecked on IP backbones, while also without spanning tree across the backbone between data center
On the net, the stability of whole network is substantially increased.By OTV technology, we can be realized in multiple data by IP network
The integration and virtualization of the network of the heart, realizes computing resource free-flowing in different pieces of information in the heart, also for dual-active data in
The realization of the heart ensures there is provided network.
Wherein intelligent DNS multi-site selector is used for the living based on domain name across data center to be realized more；It is applied to be based on
The application (service of for example typical B/S frameworks) that domain name conducts interviews.Can realize setting by intelligent DNS multi-site selector
Stand in the load balancing between multiple places or the data center in isolated topologies.Its target is to guide client to being best suitable for
Or best data center.There are some shortcomings based on the DNS systems of BIND in traditional：
1st, BIND cannot determine which provides " availability " of the equipment of address
2nd, BIND only has a kind of simple equalization methods-circulation (Round Robin)
In order to assist in ensuring that data center's availability, the intelligent DNS multistation point selection equipment of configuration specialty is needed, number is realized
GSLB according in the heart and intelligent trouble switching, to assist in ensuring that business continuance, comprehensive domain name system (DNS)
Support with DHCP (DHCP), and resist the distributed denial of service attack based on DNS.
And the intelligent DNS multi-site selector major function and mechanism of the embodiment of the present invention：
1st, intelligent DNS multi-site selector has abundant and intelligent close exploration policy：
2nd, intelligent DNS multi-site selector is using strategy Source-list modes nearby, it is possible to achieve global load is
Weighing apparatus, provides close access ability for client.
3rd, intelligent DNS multi-site selector is interacted with corresponding router probe using DRP agreements and is just embodied as client's offer
Near dns resolution
4th, the load of intelligent DNS multi-site selector keepalive mechanism kal-ap detection VIP and online information (Load
and VIP online status)
5th, intelligent DNS multi-site selector realizes polycentric automatic switchover and load balancing, and multiple stage intelligent DNS is more
Unified management cluster realized by website selector；
Intelligent DNS multi-site selector makes intelligence using its function according to the operation conditions of particular device in network
DNS decision-makings.Due to realizing that network equipment operation conditions is monitored, and according to the information that collects in these equipment from network
To determine to provide which resource record, it is special that intelligent DNS multi-site selector increased a lot of intelligence for existing DNS infrastructure
Property.Intelligent DNS multi-site selector is not a kind of substitute products of existing DNS name server, conversely, intelligent DNS multistation
Point selection device together provides high availability with DNS control methods, can improve the value of existing name server.
Application disaster tolerance technology based on domain name is combined with IP address-based application disaster tolerance technology, it is possible to achieve complete
Across data-center applications disaster recovery solutions.
Wherein application load balancing device is for across data center calculation capacity scheduling DWS.The present invention is to be in embodiment
Centered on the server load balancing equipment that disposes in data center, by the network equipment to the perception across data center, will
The virtual computing platforms linkage that disposes in multiple data centers is got up, it is possible to achieve dispatch across the computing capability of data center.
1st, load-balancing device can be with the network apparatus linking for supporting data center virtualization interconnection technique OTV, can be with
Identify which virtual server is located locally data center, which virtual server is located at strange land data center；
2nd, load-balancing device can be linked with virtual computing management platform, intracardiac computing capability, example in perception data
Such as：
3rd, the server administrators of vmware directly can be managed on vCenter after a virtual server is increased
Load-balancing device, virtual server is added in server zone serverfarm；
4th, load-balancing device can directly read the virtual server status information in vCenter, including CPU information,
Memory information etc.；
5th, local data center computing capability deficiency is perceived in load-balancing device, when performance indications exceed threshold values, can
Automatically flow is oriented to the virtual server of health in other data centers, so as to realize that the computing capability across data center is adjusted
Degree.
Wherein MDS fibre channel medias are used for realizing SAN extension storage technology.In embodiments of the present invention, carry respectively
Go out with city disaster-tolerant backup solution and remote disaster tolerance backup solution：
With city disaster-tolerant backup solution：Set up and be available with same city scope with the advantage of the maximum of city Disaster Preparation Center
(within i.e. 30 to 100 kilometers) realize the interconnection between Liang Ge data centers using bare fibre.In order to make full use of bandwidth, also
Bandwidth between website and availability can be improved using CWDM or DWDM wavelength division multiplex schemes.There is high bandwidth in two numbers
Be connected according to the SAN between center, be copied into the synchronization of data in order to may, it is possible to implement high-speed data replicate and recover
Business continuity policy.The complete series MDS fibre channel media of Cisco can support optical channel technology between Tong Cheng
The extension interconnection of SAN, in order to support quick data duplication.
Remote disaster tolerance backup solution：When the backup of longer distance is needed, more connection lines can be IP network,
Local data center and remote data center SAN can be interconnected using FCIP technology.In the long-range JA(junction ambient)s of this FCIP
Under, because the time delay ratio of data transfer is big with the time delay that bare fibre connects with city, the more difficult enforcement of the scheme for synchronously replicating,
Therefore most enterprises take asynchronous data replication technology.Using Cisco's MDS9222i or 9216i fibre channel media,
The GE ports of the support FCIP technology for itself carrying, can easily realize the extension interconnection of the SAN between multi-site.
The advantage of the embodiment of the present invention is：
1st, the how living framework of multiple data centers can be expanded to from dual-active data center；
2nd, network is provided for multiple data centers, apply, the integrated scheme of data many levels dual-active；
3rd, the support to virtualized environment, application traffic can follow virtual machine to flow between multiple data centers；
4th, load balance of wide area network and application load balancing is integrated, and complete High Availabitity is provided for data center and is supported.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of without departing from principle of the present invention, some improvements and modifications can also be made, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (4)
1. a kind of how polycentric data center's dual-active system, it is characterised in that include：
Wherein described data switching exchane connects each data center to realize two layers of interconnection, and realizes calculating money based on OTV technology
Free-flowing of the source in different pieces of information in the heart；
Wherein intelligent DNS multi-site selector connects each data center to realize multiple data when user is by domain name access
The load balancing at center；
Wherein described application load balancing device connects each data center, and the server load balancing to dispose in data center
The perception across data center is carried out centered on equipment, by multiple data centers dispose virtual computing platforms linkage realize across
The computing capability scheduling of data center；
Wherein MDS fibre channel medias are used for realizing SAN extension storages technology to realize same city disaster-tolerant backup or remote disaster tolerance
Backup；Wherein with city disaster-tolerant backup be between multiple data centers by and naked light using CWDM or DWDM wavelength division multiplex schemes
Fibre is connected with each other；Remote disaster tolerance backup is interconnected by FCIP technology between multiple data centers.
2. how polycentric data center's dual-active system according to claim 1, it is characterised in that also include for controlling
Make the data synchronizing unit of multiple data center's data syn-chronizations, the data synchronizing unit is using data duplicates technology or asynchronous
Data Replication Technology in Mobile realizes the data syn-chronization of multiple data centers.
3. how polycentric data center's dual-active system according to claim 1, it is characterised in that wherein described application
Load equalizer connects each data center, is provided with virtual server to connect the application load balancing in each data center
Device, so that the application load balancing device knows the load parameter of the data center.
4. a kind of method of the manyly polycentric data center's dual-active system using as described in claim 1-3, its feature exist
In, including：
Multiple data centers are carried out two layers of interconnection by data switching exchane, and realizes computing resource in difference based on OTV technology
Free-flowing between data center；
Multiple data centers are all connected to intelligent DNS multi-site selector, are passed through in user with connecting each data center
The load balancing of multiple data centers is realized during domain name；
Multiple data centers are all connected to application load balancing device, and are set with the server load balancing that disposes in data center
The perception across data center is carried out centered on standby, the virtual computing platforms linkage that disposes in multiple data centers is realized across number
Dispatch according to the computing capability at center；
To realize that SAN expands directly or indirectly through the connection of MDS fibre channel medias to realize between multiple data centers
Exhibition memory technology is backed up with realizing same city disaster-tolerant backup or remote disaster tolerance；It is between multiple data centers wherein with city disaster-tolerant backup
By and bare fibre using CWDM or DWDM wavelength division multiplex schemes be connected with each other；Remote disaster tolerance backup be multiple data centers it
Between interconnected by FCIP technology.
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