CN1209714C - Server system based on network storage and expandable system structure and its method - Google Patents

Server system based on network storage and expandable system structure and its method Download PDF

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Publication number
CN1209714C
CN1209714C CN 02103274 CN02103274A CN1209714C CN 1209714 C CN1209714 C CN 1209714C CN 02103274 CN02103274 CN 02103274 CN 02103274 A CN02103274 A CN 02103274A CN 1209714 C CN1209714 C CN 1209714C
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server
metadata
metamessage
load
network
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CN1444149A (en
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许鲁
张建刚
范中磊
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Beijing Zhongke blue whale Information Technology Co., Ltd.
Tianjin Branch Blue Whale Information Technology Co., Ltd.
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Institute of Computing Technology of CAS
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Abstract

The present invention relates to a server system and a method based on network storage and an expandable system structure. The present invention has an interconnected exchange network, all servers and network storage devices in a system are connected by an interconnected exchange network in a distributed way. A plurality of application servers running application programs visit metadata information of a meta-information server and a load balance server by the interconnected exchange network and directly visit data on the storage device by the interconnected exchange network. The meta-information servers processing metadata information provide visiting and operating service of meta-information. At least one load balance server completes dynamic mapping from files to the meta-information servers and a dynamic balance of system load. The network storage device stores the metadata and data. The present invention has good expandability which comprises extensibility of capability and extensibility of memory capacity. Under the condition that a system structure keeps constant, the performance and the capacity of the system can be increased along with the increase of a network bandwidth.

Description

The server system of storage Network Based and expandable system structure and method
Technical field
The present invention relates to areas of information technology, the computer server system and the method for particularly a kind of storage Network Based and expandable system structure.
Background technology
The server system of storage Network Based and expandable system structure is meant in the design of server system, is core with the storage system, emphasizes reliability, high-performance, extensibility, manageability and the dynamic process ability of data, services.Technology commonly used at present is SAN (storage area network).
SAN is a kind of high-speed dedicated storage networking or subnet that is similar to common LAN (Local Area Network).Comprised independently a network or a subnet in the SAN structure, optical-fibre channel is the backbone of this network.The structure of SAN as shown in Figure 1, server 1 separates with memory device 3, server is by fiber channel network 2 accessing storage devices.Memory device comprises disk array etc.
SAN based on optical-fibre channel has good reliability, and its main shortcoming is the equipment manufacturing cost height, and interoperability is very poor each other, and system management is complicated and expensive.TFS (passing soft file system) is the canonical system that adopts the SAN structure.
TFS comprises application server, the metadata processing server and the network storage equipment.Metadata processing server and application server all carry disk system, and metadata is separated storage with general data; The transmission of data is directly to deliver to application server from memory device.Advantage is that data transmission efficiency obviously is better than NFS (network file system(NFS)), and shortcoming is to have only a metadata processing server, and poor expandability, the distributed store of data cause the complexity and the poor efficiency of data management.
Summary of the invention
The object of the present invention is to provide the server system design proposal of a kind of storage Network Based and expandable system structure, solve the problems such as poor expandability, I/O poor performance, dynamic process ability, data management complexity and cost height in the existing design proposal.
Another object of the present invention is to provide the method for a kind of storage Network Based and expandable system structure.
According to an aspect of the present invention, the server system of a kind of storage Network Based and expandable system structure comprises:
The interconnection exchange network, the Servers-all in the system is connected by the interconnection exchange network with the network storage equipment is distributed;
A plurality of application servers that run application, it is by the metadata information of interconnection exchange network visit metamessage server, and according to this metadata information by the data on the interconnection exchange network DASD;
At least one load balance server is finished metadata to the dynamic single mapping of metamessage server and the mobile equilibrium of system load;
The network storage equipment, storing metadata and data;
The metamessage server of a plurality of process metadata information, it provides the visit and the operate services of metadata, and each the metamessage server in described a plurality of metamessage servers comprises device:
Accept the metadata services request from application server, and judge whether metadata is mapped in the device of this metamessage server;
If this metamessage server is not known mapping relations, then this metamessage server is to the device of load balance server interrogates data map relation;
If metadata is mapped in other metamessage server, the device of the request of the metamessage server process application server at this metamessage server requests metadata place;
If metadata is mapped in this metamessage server, then this metamessage server is handled the metadata of returning from the network storage equipment to network storage equipment request metadata, and the metadata of request is returned to the device of application server.
According to a further aspect in the invention, the method for a kind of storage Network Based and expandable system structure system comprises step:
With the servers all in the expandable system structure system and the network storage equipment distributed by the interconnection exchange network be connected storing metadata and data on the network storage equipment;
At least one load balance server is finished metadata to the dynamic single mapping of metamessage server and the mobile equilibrium of system load;
A plurality of application servers that run application are by the metadata service of a metamessage server in the metamessage server of a plurality of process metadata information of interconnection exchange network request;
This metamessage server is accepted the metadata services request from application server, and judges whether metadata is mapped in this metamessage server;
If this metamessage server is not known mapping relations, then this metamessage server is to load balance server interrogates mapping relations, and the load balance server determines that according to binding mode mapping relations also return to this metamessage server with these mapping relations,
If metadata is mapped in other metamessage server, the request of the metamessage server process application server at this metamessage server requests metadata place,
If metadata is to be mapped in this metamessage server, then this metamessage server is to network storage equipment request metadata, the network storage equipment returns metadata to this metamessage server, this metamessage server process metadata, and with the request metadata return to application server;
Application server is according to the data on this metadata DASD that returns.
Favorable expandability of the present invention comprises the extensibility of performance and the extensibility of memory capacity, and under system architecture kept constant substantially situation, the performance of system and capacity can increase along with the increase of the network bandwidth.It has high I/O performance, and data access adopts directly transmission and virtual interface technology, and access speed reaches and the similar level of local file system, and throughput increases along with the increase of the network bandwidth.Its data have high manageability and reliability, and the centralised storage structure is to be easy to data are carried out unified monitoring management.It has high dynamic process ability, can carry out dynamic adjustments effectively to the load of system according to certain load balancing strategy.
Description of drawings
Fig. 1 is the building-block of logic of prior art;
Fig. 2 is an overall logic structural drawing of the present invention;
Fig. 3 is the application server process flow diagram;
Fig. 4 is metamessage server flow process figure;
Fig. 5 is load balance server flow process figure.
Embodiment
General principle of design of the present invention is: centralized decision, distributed treatment.Layout strategy of the present invention mainly comprises: on system architecture, select private server mode process metadata; On data access, select direct access mode; To the mapping of system server, select dynamic single mapping mode at file; On data consistency, select File contract mode.
Compare with serverless backup mode (Serverless mode), it is more clear to adopt private server (group) mode system architecture and function to divide; During the storage system upgrading, need not the upgrade application server; The good confidentiality of data; Storage system is easy to control, manage and optimize and is not subjected to the influence of application server; In addition, has favorable expansibility equally.
Immediate data visit is meant that memory device directly links on the network, and server directly carries out the accessing operation of data to equipment by network; Indirect data access is meant by file server and visits data.Obviously, the immediate data access mode is more fast, thereby can improve the performance of system.
The mapping of file and system server comprises dual mode: single mapping and multidimensional mapping.Single mapping is meant that at any time a file can only be mapped to a system server at most.Compare with the multidimensional mapping, single mapping realizes more simple, simplied system structure design greatly; Dirigibility is better, is easy to provide the service that storage waits restriction of sharing; The consistency problem of great reduced data is because each file only is responsible for by a system server.File is locked or contract when operation when need, these operations all are only limited to relevant some servers, rather than distributed operation.In addition, single mapping can well realize the fairness of shining upon and the logicality of mapping.
The consistance of data comprises the consistance of metadata and the consistance of file data.The metadata here not only comprises the metadata in the file system, and comprises dynamic structure associated with the file, as file lock, contract etc.These data structures are complete in system, consistent, confirmability all has decisive influence for complexity, operational efficiency and the rejuvenation of system fast.Employing file contract mode realizes the consistance of file data, has reduced the complexity of system design and realization.
The operation of file can be divided into two big classes: metadata operation class and data manipulation class.Main metadata operation takies 50% system resource approximately, and the data write operation takies 50% system resource approximately.Consider from the storage system angle, not only will provide fast data transmission, and disposal system metadata effectively.The extensibility that metadata is handled is the key of total system extensibility.
In the middle of these are selected, dynamically the selection of single mapping mode is very important: adopt single mapping, the distribution of file between system server just become a complete disjoint division, simplified the design of system architecture, adopt dynamically mapping, load that can the dynamic adjusting system server, the optimization system utilization of resources, thus improve the dynamic process ability of system.
Fig. 2 has described the overall logic structure of the new services device system of storage Network Based and expandable system structure, as can be seen, present invention includes a plurality of application servers 1, a plurality of metamessage server 2, one or more load balance server 3, the network storage equipment 6 and these nodes are coupled together interconnection exchange network 4.
The present invention adopts novel server system structure---distributed network expandable system structure, all server is all distributed with the network storage equipment and be connected by the interconnection exchange network in the system, all servers all pass through exchange network accesses network memory device, and application server is by interconnection exchange network visit metamessage server.Extensibility of the present invention is based on network, promptly, increase along with the network bandwidth, under the prerequisite that does not change system architecture, only need to increase metamessage server, load balance server and the network storage equipment, network server system just can be supported the more application services device and more jumbo, more high performance data, services is provided.
Metadata among the present invention and data centralization are stored on the network storage equipment, and their visit is all finished by the interconnection exchange network.The centralized stores of data makes that manageable per capita data volume improves greatly, is convenient to adopt centralized data management, thereby improves the quality of data management and the reliability of data greatly.The centralized stores of data makes data capacity have good expandability, and only needing increases the network storage equipment, just can increase system memory size.Based on network data and metadata access interface can be easy to realize immediate data visit, make system polymerization I/O throughput almost with the proportional growth of the quantity of system memory devices, thereby provide high I/O performance to server.Because the visit of data is based on network, along with the increase of the network bandwidth, the I/O performance of system also increases thereupon; Only needing increases memory device, and the data, services of more jumbo, higher polymerization I/O throughput just can be provided.
Metamessage server among the present invention and load balance server are system's storage private server fully.Like this, the system server of storage system is clear the separation with application server.
As shown in Figure 3, application server outwards provides various services, and the various user services of operation comprise Email, WEB, Streaming Media and database etc. on application server.Application server is by metamessage server and load balance server access metadata information, by the data on the interconnection exchange network DASD.Because metadata information is that the system server cluster provides by load balance, thereby can obtain high metadata service performance; Owing to adopt the immediate data visit, thereby can obtain high data I/O performance.Take all factors into consideration, application server can obtain high metadata and data, services performance.
As shown in Figure 4, the metamessage server mainly provides visit and the operate services to metadata.For each file, the request that relative all metadata of metamessage server process are relevant.When if this document is catalogue file, the relevant meta information server also is responsible for corresponding catalogue and is handled request, as inquiring about and read catalogue etc.In addition, the metamessage server is also handled relevant request of file lock and the request of file contract.Owing to take the single mapping mode, greatly reduced the situation that needs distributed treatment.Because the operation of metadata takies 50% system resource approximately, therefore the special-purpose metamessage server cluster of employing can effectively improve the parallel processing to metadata information, improves the quality of metadata service greatly.Owing to adopt dynamic mapping mode, also become back binding mode or dynamic binding mode, when serving, request metadata determines just promptly which metamessage server this metadata information is mapped on, can effectively regulate the load of each metamessage server, make the load of metamessage server cluster be in balanced state, thereby whole resource that can the better optimize system server provides comprehensive whole high-performance metadata information service.Along with the increase of the network bandwidth, only needing increases the metamessage server, needn't change system architecture, just can improve the performance of metadata service.Therefore, the metadata service has good expandability.
As shown in Figure 5, the load balance server is finished file to the dynamic mapping of metamessage server and the mobile equilibrium of system load.The decision that file dynamically shines upon need be taken all factors into consideration load, the logical communication link between file and the user's of each metamessage server specific (special) requirements.By the load on the dynamic adjustments metamessage server, can at utmost bring into play the performance of metamessage server cluster, thereby make system have good dynamic process and regulating power.
System management table offers management environment of keeper, comprise that the keeper controls and operation automatically, as file backup with duplicate etc.

Claims (5)

1. the server system of storage Network Based and expandable system structure comprises:
The interconnection exchange network, the Servers-all in the system is connected by the interconnection exchange network with the network storage equipment is distributed;
A plurality of application servers that run application, it is by the metadata information of interconnection exchange network visit metamessage server, and according to this metadata information by the data on the interconnection exchange network DASD;
At least one load balance server is finished metadata to the dynamic single mapping of metamessage server and the mobile equilibrium of system load;
The network storage equipment, storing metadata and data;
The metamessage server of a plurality of process metadata information, it provides the visit and the operate services of metadata, and each the metamessage server in described a plurality of metamessage servers comprises following apparatus:
Accept the metadata services request from application server, and judge whether metadata is mapped in the device of this metamessage server;
If this metamessage server is not known mapping relations, then this metamessage server is to the device of load balance server interrogates data map relation;
If metadata is mapped in other metamessage server, the device of the request of the metamessage server process application server at this metamessage server requests metadata place;
If metadata is mapped in this metamessage server, then this metamessage server is handled the metadata of returning from the network storage equipment to network storage equipment request metadata, and the metadata of request is returned to the device of application server.
2. the method for storage Network Based and expandable system structure system comprises step:
With the servers all in the expandable system structure system and the network storage equipment distributed by the interconnection exchange network be connected storing metadata and data on the network storage equipment;
At least one load balance server is finished metadata to the dynamic single mapping of metamessage server and the mobile equilibrium of system load;
A plurality of application servers that run application are by the metadata service of a metamessage server in the metamessage server of a plurality of process metadata information of interconnection exchange network request;
This metamessage server is accepted the metadata services request from application server, and judges whether metadata is mapped in this metamessage server;
If this metamessage server is not known mapping relations, then this metamessage server is to load balance server interrogates mapping relations, and the load balance server determines that according to binding mode mapping relations also return to this metamessage server with these mapping relations,
If metadata is mapped in other metamessage server, the request of the metamessage server process application server at this metamessage server requests metadata place,
If metadata is to be mapped in this metamessage server, then this metamessage server is to network storage equipment request metadata, the network storage equipment returns metadata to this metamessage server, this metamessage server process metadata, and with the request metadata return to application server;
Application server is according to the data on this metadata DASD that returns.
3. by the described method of claim 2, it is characterized in that the step that described load balance server is finished the mobile equilibrium of system load comprises:
According to the logical communication link of the load of each metamessage server, metadata and user's specific (special) requirements metadata is shone upon dynamically and the metamessage server between balancing dynamic load.
4. by the described method of claim 2, it is characterized in that further comprising the steps of;
The user data request of access is sent to application server by external network;
Application server sends the metadata services request to the metamessage server;
Application server is served to network storage equipment request msg according to the metadata of returning;
The network storage equipment is handled the request of data of application server, and the data of request are returned to application server;
Application server is sent to the user with the data of returning by external network.
5. by the described method of claim 2, it is characterized in that the step that described load balance server is finished the mobile equilibrium of system load comprises:
Accept the load transfer request of metamessage server transmission or determine whether to carry out load balance according to the metamessage server load condition;
Notice metamessage server carries out load transfer;
The metamessage server that produces load sends the request of load transfer to the metamessage server that changes load over to;
Change the metamessage server process load transfer request of load over to, and result is returned to the metamessage server that produces load;
The metamessage server is with load transfer result notification load balance server.
CN 02103274 2002-03-12 2002-03-12 Server system based on network storage and expandable system structure and its method Expired - Fee Related CN1209714C (en)

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CN1293493C (en) * 2003-11-17 2007-01-03 联想(北京)有限公司 Computer group file service system and its input output treatment method
EP1816565B1 (en) * 2004-11-26 2011-06-08 Fujitsu Ltd. Computer system and information processing method
US7882283B2 (en) * 2006-11-27 2011-02-01 Cisco Technology, Inc. Virtualization support in a multiprocessor storage area network
CN101668028B (en) * 2008-09-03 2013-03-27 浙江大学 Extendable system structure-based distributed system and application method thereof
US8713060B2 (en) 2009-03-31 2014-04-29 Amazon Technologies, Inc. Control service for relational data management
CN101609432B (en) * 2009-07-13 2011-04-13 中国科学院计算技术研究所 Shared cache management system and method thereof
US8243598B2 (en) * 2010-04-26 2012-08-14 International Business Machines Corporation Load-balancing via modulus distribution and TCP flow redirection due to server overload
CN102012933B (en) * 2010-12-02 2013-01-30 清华大学 Distributed file system and method for storing data and providing services by utilizing same
CN103188205B (en) * 2011-12-27 2017-09-12 腾讯科技（北京）有限公司 A kind of information method for uploading and system based on LVS framework
CN103595736B (en) * 2012-08-14 2019-02-15 杭州海康威视系统技术有限公司 Access request treating method and apparatus in video monitoring system
CN106652153B (en) * 2016-10-17 2019-03-26 深圳市穗彩科技开发有限公司 Color method and system are sent in expansible lottery ticket retrieval

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