CN102508789A - Grading storage method for system - Google Patents
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Abstract
The invention provides a grading storage method for a system. According to the importance, the visiting frequency, the retention time and the performance index of data, the data is stored in storage devices with different performances by adopting different storage modes, so as to realize automatic migration of data objects among the storage devices; and the data which is not visited frequently is automatically transferred to lower layers in storage layers, so that storage space with higher cost can be released for the data with higher visiting frequency, so that better cost performance is obtained, further, the space occupied by the non-important data in primary local disks can be greatly reduced, and the storage performance of the whole system is quickened.
Description
Technical field
The present invention relates to a kind of computer memory technical field, specifically a kind of method of system level storage.
Background technology
In current IT management, the challenge of data storage is capacity requirement and performance requirement often.In the face of the data volume of ceaselessly increase and increasing file, visit, store and manage these data and file and become more and more difficult, the management maintenance cost is also increasingly high.Summary is got up, and the data storage subject matter of enterprises face has:
(1) a large amount of historical datas have a strong impact on system performance, and have taken the part storage space, and the memory device utilization factor is low;
(2) shortage is managed data cycle of activity flexibly and effectively, can not be with the data flexible allocation to rational storage space.
And in fact, to generally concerning enterprise, data all are to produce storage, utilization, filing through associating, and surpass each active procedure that storage period deleted at last, and have different visiting demands in each link in data activity cycle.
To the characteristic of data itself, in its different cycle of activity, for adapting to the change of reading frequency, the memory location of data also should change thereupon, to improve the utilization rate of memory device, reduces carrying cost.This kind method is exactly the classification storage of data.So, enterprise adopts expensive memory device, memory technology and storage mode, and to historical data or low value data, adopts relatively cheap equipment, and even deleted at last when its key business data of storage.
Summary of the invention
The method that the purpose of this invention is to provide a kind of system level storage.
The objective of the invention is to realize by following mode; According to importance, access frequency, retention time and the performance index of data, take different storage modes to be stored in respectively on the memory device of different performance data, realize the Autonomic Migration Framework of data object between memory device; Through moving on to level lower in the memory hierarchy automatically without the data that frequentation is asked; The storage space that discharges higher cost is given the more data of frequent access, to obtain better cost performance, like this; To significantly reduce non-importance data in the shared space of one-level local disk, accelerate the memory property of total system;
The memory device of the hierarchical stor that makes up comprises: tape library, disk or disk array; And disk is divided into FC disk, scsi disk, SATA disk according to its performance; And the flash memory storage medium also because higher performance as one-level higher in the ranked data storage organization; Disk or disk array are that cost is high, fireballing equipment; Be used for storing the important information of frequent visit, and the lower-cost storage resources of tape library is used for depositing the lower information of access frequency, the classification storing step is following:
High-end storage is that at a high speed disk system comprises: the memory device that scsi disk, FC disk, SSD disk array are formed, be fit to the program and the file of the frequent and fast access of those needs of storage, and its access speed is fast; Performance is good; The storage price is relatively costly, and high-end storage is the storage of work level, and its maximum characteristics are that memory device keeps " online " state constantly with the data of being stored; At any time read and revise, to satisfy front end application server or database rate request to the data visit;
The middle-end storage is some access speeds and the low side disk unit of price between hyperdisk and tape; Middle-end storage extension is relatively extensive; Mainly be positioned the application between online storage of client and the offline storage; Just be meant with those to be not often to use the archive that is of little use that comprises some long preservation, visit capacity and little deposit data but are that addressing is rapid, transfer rate is high to the requirement of these equipment on the lower memory device of performance in other words; Therefore; The middle-end storage is not high comparatively speaking to performance requirement, but requires access performance relatively preferably, simultaneously in most cases because the data that are of little use will account for the larger specific gravity of total amount of data; This also just requires the middle-end memory device relatively large on the needs capacity, and the middle-end memory device comprises SATA disk array, DVD-RAM CD tower and CD server equipment.
The low side storage then refers to data are backuped on tape or the tape library; The data that in most cases are mainly used in high-end storage or middle-end storage back up; To take precautions against contingent data disaster, therefore claim the storage of backup level again, the low side offline storage adopts tape as storage medium usually; Its access speed is low, but cheap mass memory;
The hierarchical storage management software of system through combining with the storage hardware product; According to the rule in data activity cycle, the data storage device distribution principle of " earlier data being migrated in the middle-end storage from high-end storage; again data are finally filed to the low side storage " is adopted in the position that the rational deployment data are preserved; Help the user set up one reasonably, data management platform efficiently, the rule of data Autonomic Migration Framework, promptly the Data Position choice function is following:
Data Position choice function Location (Data)=
Wherein
is importance, access frequency, retention time, the performance requirement parameter of data,
be the selectivity factor of corresponding
;
When the value of Location (Data) was big more, its memory location was forward more, and the equipment of storage is also good more, after Location (Data) value diminishes, will carry out data migtation to the equipment of relatively low level.
Method of the present invention is compared with prior art, and beneficial effect is:
(1) reduces operating cost, elevator system performance
High capacity, level and smooth memory capacity are expanded, and the high extendible storage administration ability in the whole enterprise-wide is provided.Reduce online high-end storage data volume, optimize the performance of high-end storage.Rational deployment data storage, reduce the system burden that a large amount of historical datas cause, thus the elevator system overall performance.Effectively combine the high-, middle-and low-end memory device, reduce the unit carrying cost.
(2) automatic management
Can on existing SAN storage system, upgrade, realize centralized management data.The data object can be managed automatically, and transition process is transparent to using, and the file that Unsupervised member helps just to move seldom visit is to than the low side storage space, conveniently manages and can improve usage ratio of equipment, has good value for applications.
Description of drawings
Fig. 1 is the hierarchical stor figure that makes up;
Fig. 2 is that data are deposited process flow diagram in storage system.
Embodiment
Explanation at length below with reference to Figure of description method of the present invention being done.
System level storage means of the present invention; Principle of work is based on the locality of data access; Classification storage is indexs such as the importance, access frequency, retention time, performance according to data; Take different storage modes to be stored in respectively on the memory device of different performance data, realize the Autonomic Migration Framework of data object between memory device through hierarchical storage management.Through moving on to level lower in the memory hierarchy automatically without the data that frequentation is asked, the storage space that discharges higher cost is given the more data of frequent access, can obtain better cost performance.Like this, can significantly reduce non-importance data in the shared space of one-level local disk on the one hand, also can accelerate the memory property of total system.
The hierarchical stor that makes up is as shown in Figure 1.In this structure; Memory device generally has tape library, disk or disk array etc.; And that disk can be divided into FC disk, scsi disk, SATA disk etc. according to its performance is multiple, and flash memory storage medium (non-volatile random access memory (NVRAM)) is also because higher performance can be used as one-level higher in the ranked data storage organization.Generally, costs such as disk or disk array are high, fireballing equipment, be used for storing the important information of frequent visit, and lower-cost storage resources such as tape library are used for depositing the lower information of access frequency.
Wherein, High-end storage mainly is the memory device that disk system (like scsi disk, FC disk, SSD disk array) is at a high speed formed, and is fit to the program and the file of the frequent and fast access of those needs of storage, and its access speed is fast; Performance is good, and the storage price is relatively costly.High-end storage is the storage of work level, and its maximum characteristic is that memory device keeps " online " state constantly with the data of being stored, and can read at any time and revise, to satisfy front end application server or the database rate request to the data visit.
The middle-end storage generally is some access speeds and the low side disk unit of price between hyperdisk and tape.Middle-end storage extension is relatively extensive, mainly is positioned the application between online storage of client and the offline storage.Just be meant with those to be not often to use (the for example archive that is of little use of some long preservation), visit capacity and little deposit data are on the lower memory device of performance in other words.But the requirement to these equipment is that addressing is rapid, transfer rate is high.Therefore, the middle-end storage is not high comparatively speaking to performance requirement, but requires access performance relatively preferably.In most cases because the data that are of little use will account for the larger specific gravity of total amount of data, this also just requires the middle-end memory device relatively large on the needs capacity simultaneously.The middle-end memory device mainly contains equipment such as SATA disk array, DVD-RAM CD tower and CD server.
The low side storage then refers to data are backuped on tape or the tape library.The data that in most cases are mainly used in high-end storage or middle-end storage back up, and to take precautions against contingent data disaster, therefore claim the storage of backup level again.The low side offline storage adopts tape as storage medium usually, and its access speed is low, but cheap mass memory.
The hierarchical storage management software of this system through combining with the storage hardware product, according to the rule in data activity cycle, the position that the rational deployment data are preserved.Adopt the data storage device distribution principle of " earlier data are migrated in the middle-end storage from high-end storage, again data are finally filed to the low side storage ", help the user set up one reasonably, data management platform efficiently.The rule of data Autonomic Migration Framework, promptly the Data Position choice function is following.
Data Position choice function Location (Data)=
Wherein
is the parameters such as importance, access frequency, retention time, performance requirement of data,
be the selectivity factor of corresponding
.
When the value of Location (Data) was big more, its memory location was forward more, and the equipment of storage is also good more.After Location (Data) value diminishes, will carry out data migtation to the equipment of relatively low level.Data in storage system to deposit flow process as shown in Figure 2.
Except that the described technical characterictic of instructions, be the known technology of those skilled in the art.
Claims (1)
1. the method for system level storage; It is characterized in that importance, access frequency, retention time and performance index, take different storage modes to be stored in respectively on the memory device of different performance data, realize the Autonomic Migration Framework of data object between memory device according to data; Through moving on to level lower in the memory hierarchy automatically without the data that frequentation is asked; The storage space that discharges higher cost is given the more data of frequent access, to obtain better cost performance, like this; To significantly reduce non-importance data in the shared space of one-level local disk, accelerate the memory property of total system;
The memory device of the hierarchical stor that makes up comprises: tape library, disk or disk array; And disk is divided into FC disk, scsi disk, SATA disk according to its performance; And the flash memory storage medium also because higher performance as one-level higher in the ranked data storage organization; Disk or disk array are that cost is high, fireballing equipment; Be used for storing the important information of frequent visit, and the lower-cost storage resources of tape library is used for depositing the lower information of access frequency, the classification storing step is following:
High-end storage is that at a high speed disk system comprises: the memory device that scsi disk, FC disk, SSD disk array are formed, be fit to the program and the file of the frequent and fast access of those needs of storage, and its access speed is fast; Performance is good; The storage price is relatively costly, and high-end storage is the storage of work level, and its maximum characteristics are that memory device keeps " online " state constantly with the data of being stored; At any time read and revise, to satisfy front end application server or database rate request to the data visit;
The middle-end storage is some access speeds and the low side disk unit of price between hyperdisk and tape; Middle-end storage extension is relatively extensive; Mainly be positioned the application between online storage of client and the offline storage; Just be meant with those to be not often to use the archive that is of little use that comprises some long preservation, visit capacity and little deposit data but are that addressing is rapid, transfer rate is high to the requirement of these equipment on the lower memory device of performance in other words; Therefore; The middle-end storage is not high comparatively speaking to performance requirement, but requires access performance relatively preferably, simultaneously in most cases because the data that are of little use will account for the larger specific gravity of total amount of data; This also just requires the middle-end memory device relatively large on the needs capacity, and the middle-end memory device comprises SATA disk array, DVD-RAM CD tower and CD server equipment;
The low side storage then refers to data are backuped on tape or the tape library; The data that in most cases are mainly used in high-end storage or middle-end storage back up; To take precautions against contingent data disaster, therefore claim the storage of backup level again, the low side offline storage adopts tape as storage medium usually; Its access speed is low, but cheap mass memory;
The hierarchical storage management software of system through combining with the storage hardware product; According to the rule in data activity cycle, the data storage device distribution principle of " earlier data being migrated in the middle-end storage from high-end storage; again data are finally filed to the low side storage " is adopted in the position that the rational deployment data are preserved; Help the user set up one reasonably, data management platform efficiently, the rule of data Autonomic Migration Framework, promptly the Data Position choice function is following:
Data Position choice function Location (Data)=
Wherein
is importance, access frequency, retention time, the performance requirement parameter of data,
be the selectivity factor of corresponding
;
When the value of Location (Data) was big more, its memory location was forward more, and the equipment of storage is also good more, after Location (Data) value diminishes, will carry out data migtation to the equipment of relatively low level.
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