CN107728939A - I O scheduling method, apparatus, equipment and storage medium based on Linux - Google Patents
I O scheduling method, apparatus, equipment and storage medium based on Linux Download PDFInfo
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- CN107728939A CN107728939A CN201710884154.5A CN201710884154A CN107728939A CN 107728939 A CN107728939 A CN 107728939A CN 201710884154 A CN201710884154 A CN 201710884154A CN 107728939 A CN107728939 A CN 107728939A
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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
- G06F3/0611—Improving I/O performance in relation to response time
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/10—Program control for peripheral devices
- G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
-
- 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
- G06F3/0659—Command handling arrangements, e.g. command buffers, queues, command scheduling
-
- 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
- G06F3/0674—Disk device
- G06F3/0676—Magnetic disk device
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
- G06F9/5027—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals
- G06F9/5038—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals considering the execution order of a plurality of tasks, e.g. taking priority or time dependency constraints into consideration
Abstract
The invention discloses a kind of I O scheduling method based on Linux, this method comprises the following steps：Read operation in queue is monitored by the first process；If the first process listens to read buffer operation, write back data initiation message is sent to the second process, so that the second process initiation write back data enters the operation of disk.The technical scheme provided using the embodiment of the present invention, when read buffer operation be present, show to read data in the buffer, in this case, second process initiation write back data enters the operation of disk, reading performance is not interfered with, while enables the data in caching to be written back into disk in time, reduces data loss probability.The invention also discloses a kind of I O scheduling device, equipment and storage medium based on Linux, has relevant art effect.
Description
Technical field
The present invention relates to Computer Applied Technology field, more particularly to the I O scheduling method, apparatus based on Linux, sets
Standby and storage medium.
Background technology
With the fast development of computer technology, the various application systems based on Linux gradually increase.Linux system is more
It is that the disk I/O operation of process is resequenced using I O scheduling algorithm, justice effectively realizes I O scheduling algorithm pair
The lifting of linux system performance has very big influence.
At present, in linux system, conventional I O scheduling method is AS (Anticipatory, it is contemplated that) algorithm.The algorithm
It is when needing to read data, data is first read from caching, when not having data to be read in caching, performs I/O operation and disk is entered
Row read operation；,, will when the wait internal memory free time is less than threshold value in the data write-in caching being first written into when needing to write data
Data are written back in disk again.
There is the shortcomings that certain in this method, data are written in caching, if waiting internal memory free time long period still not
Less than threshold value so that data can not be written back in disk, may result in loss of data, i.e. data loss probability is larger.
The content of the invention
It is an object of the invention to provide I O scheduling method, apparatus, equipment and the storage medium based on Linux, in time will
Write back data enters disk, reduces data loss probability.
In order to solve the above technical problems, the present invention provides following technical scheme：
A kind of I O scheduling method based on Linux, including：
Read operation in queue is monitored by the first process；
If first process listens to read buffer operation, write back data initiation message is sent to the second process, with
The second process initiation write back data is set to enter the operation of disk.
In a kind of embodiment of the present invention, in addition to：
If first process listens to disk read operation, send write back data pause to second process and disappear
Breath, so that the second process suspension write back data enters the operation of disk.
In a kind of embodiment of the present invention, in addition to：
If first process does not hear any read operation, send the write back data to second process and open
Dynamic message, so that the second process initiation write back data enters the operation of disk.
The present invention a kind of embodiment in, it is described by the first process monitor queue in read operation it
Before, in addition to：
Start first process when reaching the time interval of setting.
In a kind of embodiment of the present invention, the read operation monitored by the first process in queue, including：
In default monitoring duration, the read operation in queue is monitored by the first process.
A kind of I O scheduling device based on Linux, including：
Module is monitored, for monitoring the read operation in queue by the first process；
First message sending module, for when first process listens to read buffer operation, being sent to the second process
Write back data initiation message, so that the second process initiation write back data enters the operation of disk.
In a kind of embodiment of the present invention, in addition to：
Second message transmission module, for when first process listens to disk read operation, to second process
Write back data suspending message is sent, so that the second process suspension write back data enters the operation of disk.
In a kind of embodiment of the present invention, the first message sending module, it is additionally operable to：
When first process does not hear any read operation, send the write back data to second process and start
Message, so that the second process initiation write back data enters the operation of disk.
A kind of I O scheduling equipment based on Linux, including：
Memory, for storing computer program；
Processor, the step of above-mentioned I O scheduling method based on Linux is realized during for performing the computer program.
A kind of computer-readable recording medium, computer program is stored with the computer-readable recording medium, it is described
The step of above-mentioned I O scheduling method based on Linux is realized when computer program is executed by processor.
The technical scheme provided using the embodiment of the present invention, the read operation in queue is monitored by the first process, if
First process listens to read buffer operation, then write back data initiation message is sent to the second process, so that the second process initiation number
According to the operation for being written back into disk.When read buffer operation be present, show to read data in the buffer, in this case, second
Process initiation write back data enters the operation of disk, does not interfere with reading performance, at the same enable caching in the timely write-back of data
Enter disk, reduce data loss probability.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of implementing procedure figure of the I O scheduling method based on Linux in the embodiment of the present invention；
Fig. 2 is another implementing procedure figure of the I O scheduling method based on Linux in the embodiment of the present invention；
Fig. 3 is the schematic diagram of the I O scheduling process based on Linux in the embodiment of the present invention；
Fig. 4 is a kind of structural representation of the I O scheduling device based on Linux in the embodiment of the present invention；
Fig. 5 is a kind of structural representation of the I O scheduling equipment based on Linux in the embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiment is only part of the embodiment of the present invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
It is shown in Figure 1, a kind of implementing procedure of the I O scheduling method based on Linux provided by the embodiment of the present invention
Figure, this method may comprise steps of：
S110：Read operation in queue is monitored by the first process.
In actual applications, user or other systems can be written and read operation to the data in linux system.Read behaviour
Make or the request of write operation can be deposited into respective queue respectively.In embodiments of the present invention, can be supervised by the first process
Listen the read operation in queue.
S120：If the first process listens to read buffer operation, write back data initiation message is sent to the second process, with
The second process initiation write back data is set to enter the operation of disk.
In linux system, if being cached with target data to be read, number of targets can be directly read from caching
According to the operation that target data is directly read from caching can be described as read buffer operation.The reading behaviour in queue is monitored in the first process
During work, if the first process listens to read buffer operation, show current read operation to read data from caching
Operation, be not related to from disk read data operation, in this case, the first process can with the second process communication, to
Second process sends write back data initiation message, after the second process receives write back data initiation message, can be returned with log-on data
Write the operation of disk.
Because being now to read data in the buffer, the process of the operation of disk is entered in the second process progress write back data
In, reading performance is not interfered with, and can allow the second process that the write back data in caching is entered into disk as early as possible, reduce number
According to the probability of loss of data during write-back.
The method provided using the embodiment of the present invention, the read operation in queue is monitored by the first process, if first
Process listens to read buffer operation, then sends write back data initiation message to the second process, so that the second process initiation data are returned
Write the operation of disk.When read buffer operation be present, show to read data in the buffer, in this case, the second process
Log-on data is written back into the operation of disk, does not interfere with reading performance, while enables the data in caching to be written back into magnetic in time
Disk, reduce data loss probability.
In one embodiment of the invention, as shown in Fig. 2 this method can also comprise the following steps：
S130：If the first process listens to disk read operation, write back data suspending message is sent to the second process, with
The second process suspension write back data is set to enter the operation of disk.
In actual applications, if not having target data to be read in caching, mesh can be directly read from disk
Data are marked, the operation that target data is directly read from disk can be described as disk read operation.In the first process monitors queue
During read operation, if the first process listens to disk read operation, show current read operation to read number from disk
According to operation, in this case, the first process can with the second process communication, to the second process send write back data pause disappear
Breath, after the second process receives write back data suspending message, can suspend the operation that write back data enters disk.
, will if the second process still provides for the operation that write back data enters disk during reading data in disk
Reading performance and write performance can be influenceed, the probability of loss of data also will increase during write back data.There is provided using the embodiment of the present invention
Method, when the first process listens to disk read operation, send write back data suspending message to the second process, the second process is temporary
Stop the operation that write back data enters disk, can avoid influenceing reading performance and write performance, data loss probability when reducing write back data.
In another embodiment of the present invention, as shown in Fig. 2 this method can also comprise the following steps：
S140：If the first process does not hear any read operation, write back data initiation message is sent to the second process,
So that the second process initiation write back data enters the operation of disk.
In actual applications, read buffer may not both operates or do not read without any read operation in current queue
Disk operating.When the first process does not hear any read operation, the first process can with the second process communication, to the second process
Write back data initiation message is sent, after the second process receives write back data initiation message, disk can be written back into log-on data
Operation.So write back data in caching can be entered into disk in time, reduce data loss probability during write back data.
In one embodiment of the invention, before step S110, this method can also comprise the following steps：
Start the first process when reaching the time interval of setting.
In embodiments of the present invention, certain time interval can be set, starts when reaching the time interval of setting
One process, the read operation in queue is monitored by the first process.
Time interval can be set and be adjusted according to actual conditions, such as be set as 1 second, 1 minute, and the present invention is implemented
Example is without limitation.
In one embodiment of the invention, step S110 may comprise steps of：
In default monitoring duration, the read operation in queue is monitored by the first process.
In embodiments of the present invention, certain monitoring duration can be set.In default monitoring duration, enter by first
Journey monitors the read operation in queue.
Monitor duration can be set and be adjusted according to actual conditions or above-mentioned time interval, be such as set as 1 millisecond, 1
Second, 1 minute etc., the embodiment of the present invention is without limitation.
For ease of understanding, the technical scheme provided by taking the I O scheduling process shown in Fig. 3 as an example the embodiment of the present invention is entered
Row illustrates.
(1) the first process P1 started is responsible for monitoring the read operation in T time point in queue, and the second process P2 is responsible for data
Write-back.Tn to Tn+1 time interval can be set according to actual conditions, can be 1 millisecond, 1 second or 1 minute etc..N=0,
1、2、3、……。
(2) when P1 listens to read buffer operation, notify P2 and carry out the operation that write back data enters disk；When P1 listens to reading
During disk operating, the operation that P2 pause write back datas enter disk is notified.
(3) in T0~T1 periods：P1, which is listened to, has only carried out read buffer operation, notifies P2 log-on datas and is written back into disk
Operation.
(4) in T1~T2 periods：P1 listens to system and carries out read buffer and data write back operations.
(5) in T2~T3 periods：P1 listens to system and has carried out disk read operation, notifies P2 pause write back datas and enters magnetic
The operation of disk.
(6) in T3~T4 periods：P1 listens to system and does not do any read operation, notifies P2 log-on datas and is written back into disk
Operation.
The method provided using the embodiment of the present invention, reading performance can be lifted and write the integrality of data.Pass through monitoring
Read operation, the time of control data write-back, it is ensured that reading performance is unaffected, while can enable data to be written back to magnetic in time
In disk, the probability of loss of data is reduced.
Corresponding to above method embodiment, the embodiment of the present invention additionally provides a kind of I O scheduling device based on Linux,
A kind of I O scheduling device based on Linux described below can phase with a kind of above-described I O scheduling method based on Linux
Mutually to should refer to.
Shown in Figure 4, the device can include with lower module：
Module 410 is monitored, for monitoring the read operation in queue by the first process；
First message sending module 420, for when the first process listens to read buffer operation, number to be sent to the second process
According to write-back initiation message, so that the second process initiation write back data enters the operation of disk.
The device provided using the embodiment of the present invention, the read operation in queue is monitored by the first process, if first
Process listens to read buffer operation, then sends write back data initiation message to the second process, so that the second process initiation data are returned
Write the operation of disk.When read buffer operation be present, show to read data in the buffer, in this case, the second process
Log-on data is written back into the operation of disk, does not interfere with reading performance, while enables the data in caching to be written back into magnetic in time
Disk, reduce data loss probability.
In a kind of embodiment of the present invention, in addition to：
Second message transmission module, for when the first process listens to disk read operation, data to be sent to the second process
Write-back suspending message, so that the second process suspension write back data enters the operation of disk.
In a kind of embodiment of the present invention, first message sending module 420, it is additionally operable to：
When the first process does not hear any read operation, write back data initiation message is sent to the second process, so that the
Two process initiation write back datas enter the operation of disk.
In a kind of embodiment of the present invention, in addition to process initiation module, it is used for：
Before the read operation in queue is monitored by the first process, start first to enter when reaching the time interval of setting
Journey.
In a kind of embodiment of the present invention, module 410 is monitored, is specifically used for：
In default monitoring duration, the read operation in queue is monitored by the first process.
Corresponding to above method embodiment, the embodiment of the present invention additionally provides a kind of I O scheduling equipment based on Linux,
A kind of I O scheduling equipment based on Linux described below can phase with a kind of above-described I O scheduling method based on Linux
Mutually to should refer to.
Shown in Figure 5, the equipment includes：
Memory 510, for storing computer program；
Processor 520, the step of above-mentioned I O scheduling method based on Linux is realized during for performing computer program.
Corresponding to above method embodiment, the embodiment of the present invention additionally provides a kind of computer-readable recording medium, under
A kind of computer-readable recording medium of text description can be mutually corresponding with a kind of above-described I O scheduling method based on Linux
Reference.
A kind of computer-readable recording medium, computer program, computer journey are stored with computer-readable recording medium
The step of above-mentioned I O scheduling method based on Linux is realized when sequence is executed by processor.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, between each embodiment same or similar part mutually referring to.For dress disclosed in embodiment
For putting, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is referring to method part
Explanation.
Professional further appreciates that, with reference to the unit of each example of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, the composition and step of each example are generally described according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical scheme.Specialty
Technical staff can realize described function using distinct methods to each specific application, but this realization should not
Think beyond the scope of this invention.
Directly it can be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), internal memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Specific case used herein is set forth to the principle and embodiment of the present invention, and above example is said
It is bright to be only intended to help and understand technical scheme and its core concept.It should be pointed out that for the common of the art
For technical staff, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these
Improve and modification is also fallen into the protection domain of the claims in the present invention.
Claims (10)
- A kind of 1. I O scheduling method based on Linux, it is characterised in that including：Read operation in queue is monitored by the first process；If first process listens to read buffer operation, write back data initiation message is sent to the second process, so that institute State the operation that the second process initiation write back data enters disk.
- 2. according to the method for claim 1, it is characterised in that also include：If first process listens to disk read operation, write back data suspending message is sent to second process, with The second process suspension write back data is set to enter the operation of disk.
- 3. according to the method for claim 2, it is characterised in that also include：If first process does not hear any read operation, send the write back data startup to second process and disappear Breath, so that the second process initiation write back data enters the operation of disk.
- 4. the method according to any one of claims 1 to 3, it is characterised in that monitored described by the first process Before read operation in queue, in addition to：Start first process when reaching the time interval of setting.
- 5. according to the method for claim 4, it is characterised in that the read operation monitored by the first process in queue, Including：In default monitoring duration, the read operation in queue is monitored by the first process.
- A kind of 6. I O scheduling device based on Linux, it is characterised in that including：Module is monitored, for monitoring the read operation in queue by the first process；First message sending module, for when first process listens to read buffer operation, data to be sent to the second process Write-back initiation message, so that the second process initiation write back data enters the operation of disk.
- 7. device according to claim 6, it is characterised in that also include：Second message transmission module, for when first process listens to disk read operation, being sent to second process Write back data suspending message, so that the second process suspension write back data enters the operation of disk.
- 8. device according to claim 7, it is characterised in that the first message sending module, be additionally operable to：When first process does not hear any read operation, send the write back data startup to second process and disappear Breath, so that the second process initiation write back data enters the operation of disk.
- A kind of 9. I O scheduling equipment based on Linux, it is characterised in that including：Memory, for storing computer program；Processor, realize during for performing the computer program as described in any one of claim 1 to 5 based on Linux The step of I O scheduling method.
- 10. a kind of computer-readable recording medium, it is characterised in that be stored with computer on the computer-readable recording medium Program, the IO based on Linux as described in any one of claim 1 to 5 is realized when the computer program is executed by processor The step of dispatching method.
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| CN110543384A (en) * | 2019-09-05 | 2019-12-06 | Oppo广东移动通信有限公司 | Memory write-back method, device, terminal and storage medium |
| CN110543384B (en) * | 2019-09-05 | 2022-05-17 | Oppo广东移动通信有限公司 | Memory write-back method, device, terminal and storage medium |
| WO2021109703A1 (en) * | 2019-12-05 | 2021-06-10 | 腾讯科技（深圳）有限公司 | Data processing method, chip, apparatus, and storage medium |
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