CN107168652A - A kind of method of lifting SSD Cache reading performances - Google Patents
A kind of method of lifting SSD Cache reading performances Download PDFInfo
- Publication number
- CN107168652A CN107168652A CN201710359107.9A CN201710359107A CN107168652A CN 107168652 A CN107168652 A CN 107168652A CN 201710359107 A CN201710359107 A CN 201710359107A CN 107168652 A CN107168652 A CN 107168652A
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- data
- ssd cache
- lifting
- ssd
- reading performances
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
- G06F3/061—Improving I/O performance
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0638—Organizing or formatting or addressing of data
- G06F3/064—Management of blocks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
- G06F3/0656—Data buffering arrangements
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
- G06F3/0671—In-line storage system
- G06F3/0673—Single storage device
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- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention provides a kind of method of lifting SSD Cache reading performances, the hit rate of data is accessed for improving system, described method comprises the following steps：Step 1：Write data；Step 2：Digital independent；Step 3：Storage system carries out real-time tracking to the access temperature of data storage in SSD Cache, and data block Thermometer is generated in system according to the order of access times from high to low；Step 4：The data stored in SSD Cache are replaced with reference to data block Thermometer.By way of above-mentioned data write SSDCache and temperature is safeguarded, client traffic needs the data read and write can be by complete record in SSDCache, the performance of Operational Visit can be effectively lifted, management of the method to Cache data is finer, ensure that data by 100% hit.
Description
Technical field
SSD Cache reading performances can be effectively lifted present invention relates generally to technical field of memory, more particularly to one kind
Method.
Background technology
With the growth of client traffic level and data volume, the reaction speed to system requires more and more higher, i.e., we need
The performance of system is wanted to be consequently increased.In order to meet the demand of client, storage system can typically use SSD disks slow as two grades
Deposit, need the data block often accessed to be stored in SSD Cache client traffic, to lift data block hit rate.But tradition
SSD Cache typically follow the principle of first in first out, this kind of method sets simple, excellent in efficiency and suitable for most of applications
Scene, but the scene of some high hit rate demands can not be met.
The content of the invention
In order to solve the above problems, the invention provides a kind of method of lifting SSD Cache reading performances, using based on number
According to the SSD Cache more new strategies of block access temperature, the performance for lifting SSD Cache, this method is mainly to SSD Cache
In the access temperature of each data block carry out real-time tracking, according to access temperature data block is carried out it is " dsc data locking " and " cold
Data are driven away ", so as to ensure that system accesses the high hit rate of data, with lifting system performance.
The present invention uses following technical scheme：
A kind of method of lifting SSD Cache reading performances, the hit rate of data is accessed for improving system, and its feature exists
In described method comprises the following steps：
Step 1：Write data；
Step 2：Digital independent；
Step 3：Storage system carries out real-time tracking to the access temperature of data storage in SSD Cache, and according to access
The order of number of times from high to low generates data block Thermometer in system；
Step 4：The data stored in SSD Cache are replaced with reference to data block Thermometer.
Further, the process that implements of step 1 is：System performs data write operation, and system can be by the member of data
In data storage SSD Cache.
Further, step 1 also includes following operation：Data are prestored to SSD Cache by user or technical staff
In.
Further, step 1 also includes following operation：System performs data more new strategy, and the data after renewal are deposited
Store up in SSD Cache.
Further, the process that implements of step 2 is：When carrying out digital independent, system can be in SSD Cache
Metadata is detected, is read the data for needing to read in SSD Cache from HDD according to metadata.
It is preferred that, in step 2, system reads the associated data of required data simultaneously in data needed for reading simultaneously
It is stored in SSD Cache.
Further, described data block Thermometer at least includes data name and the access times of the data.
Further, the process that implements of step 4 is：System re-executes step 1-2, in digital independent to SSD
During Cache, if SSD Cache memory spaces are full, system according to the order in data block Thermometer from low to high successively
Replace the data in SSD Cache.
The beneficial effects of the invention are as follows：
1st, the access temperature to each data block in SSD Cache carries out real-time tracking, according to access temperature to data block
Carry out " dsc data locking " and " cold data expeling ", so as to ensure that system accesses the high hit rate of data, with lifting system performance.
2nd, run efficient, metadata is recorded in SSD Cache, can location data block position rapidly.
3rd, finer to Cache data managements, a variety of methods ensure the temperature of data block, ensure that data block quilt
100% hit.
Brief description of the drawings
Fig. 1 is the inventive method flow chart.
Embodiment
Set forth herein utilization " data block Thermometer " lifting system performance method mainly include following two aspects：①
The source of SSD Cache data；2. SSD Cache data blocks temperature is tracked.SSD Cache data are mainly derived from following three kinds
Mode：1. data block metadata；2. active pre-stored data；3. follow-up policy update；Utilize " data block Thermometer " lifting system
The method of performance is specifically described as follows.
The method of lifting SSD Cache reading performances, the hit rate of data is accessed for improving system as shown in Figure 1, described
Method comprise the following steps：
Step 1：Data are write, particular content includes at least three types：
1) system performs data write operation, and system can store the metadata of data in SSD Cache；
2) data are prestored in SSD Cache by user or technical staff；
3) system performs data more new strategy, and by the data Cun Chudao SSD Cache after renewal.
Step 2：Digital independent, detailed process is：When carrying out digital independent, system can be to first number in SSD Cache
According to being detected, the data for needing to read are read from HDD in SSD Cache according to metadata.Moreover, system is being read
During required data, the associated data of required data is read and is stored in SSD Cache simultaneously.
Step 3：Focus sorts, and the process of implementing is：Access temperature of the storage system to data storage in SSD Cache
Real-time tracking is carried out, and data block Thermometer is generated in system according to the order of access times from high to low.Wherein, it is described
Data block Thermometer at least includes data name and the access times of the data.
Step 4：Data are replaced, and the process of implementing is：System re-executes step 1-2, in digital independent to SSD
During Cache, if SSD Cache memory spaces are full, system according to the order in data block Thermometer from low to high successively
Replace the data in SSD Cache.
It should be pointed out that embodiment described above can make those skilled in the art that the present invention is more fully understood
Concrete structure, but do not limit the invention in any way create.Therefore, although specification and drawings and examples are to the present invention
Creation has been carried out detailed description, it will be understood by those skilled in the art, however, that still can be repaiied to the invention
Change or equivalent substitution；And technical scheme and its improvement of all spirit and scope for not departing from the invention, it is covered
Among the protection domain of the invention patent.
Claims (8)
1. a kind of method of lifting SSD Cache reading performances, the hit rate of data is accessed for improving system, it is characterised in that
Described method comprises the following steps：
Step 1：Write data；
Step 2：Digital independent；
Step 3：Storage system carries out real-time tracking to the access temperature of data storage in SSD Cache, and according to access times
Order from high to low generates data block Thermometer in system；
Step 4：The data stored in SSD Cache are replaced with reference to data block Thermometer.
2. a kind of method of lifting SSD Cache reading performances according to claim 1, it is characterised in that step 1 includes
Implemented below process：System performs data write operation, and system can store the metadata of data in SSD Cache.
3. a kind of method of lifting SSD Cache reading performances according to claim 2, it is characterised in that step 2 it is specific
Implementation process is：When carrying out digital independent, system can be detected to the metadata in SSD Cache, will according to metadata
The data read are needed to be read from HDD in SSD Cache.
4. the method for a kind of lifting SSD Cache reading performances according to claim 3, it is characterised in that in step 2,
The associated data of required data is read and is stored in SSD Cache simultaneously in data needed for reading by system.
5. a kind of method of lifting SSD Cache reading performances according to claim 1, it is characterised in that step 1 include with
Lower operation：Data are prestored in SSD Cache by user or technical staff.
6. a kind of method of lifting SSD Cache reading performances according to claim 1, it is characterised in that step 1 include with
Lower operation：System performs data more new strategy, and by the data Cun Chudao SSDCache after renewal.
7. a kind of method of lifting SSD Cache reading performances according to claim 1, it is characterised in that described data
Block Thermometer at least includes data name and the access times of the data.
8. a kind of method of lifting SSD Cache reading performances according to claim 1, it is characterised in that step 4 it is specific
Implementation process is：System re-executes step 1-2, during digital independent to SSD Cache, if SSD Cache storages are empty
Between it is full, system replaces the data in SSD Cache according to the order in data block Thermometer from low to high successively.
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| CN201710359107.9A CN107168652A (en) | 2017-05-19 | 2017-05-19 | A kind of method of lifting SSD Cache reading performances |
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| CN201710359107.9A CN107168652A (en) | 2017-05-19 | 2017-05-19 | A kind of method of lifting SSD Cache reading performances |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110413235A (en) * | 2019-07-26 | 2019-11-05 | 华中科技大学 | A kind of data distributing method and system towards SSD duplicate removal |
| CN110990300A (en) * | 2019-12-20 | 2020-04-10 | 山东方寸微电子科技有限公司 | Cache memory replacement method and system based on use heat |
| US10884938B2 (en) | 2018-12-13 | 2021-01-05 | International Business Machines Corporation | Method and apparatus for prefetching data items to a cache |
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| CN103186350A (en) * | 2011-12-31 | 2013-07-03 | 北京快网科技有限公司 | Hybrid storage system and hot spot data block migration method |
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| US10884938B2 (en) | 2018-12-13 | 2021-01-05 | International Business Machines Corporation | Method and apparatus for prefetching data items to a cache |
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Application publication date: 20170915 |