CN109491611A - A kind of metadata rule method, device and equipment - Google Patents
A kind of metadata rule method, device and equipment Download PDFInfo
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- CN109491611A CN109491611A CN201811319311.9A CN201811319311A CN109491611A CN 109491611 A CN109491611 A CN 109491611A CN 201811319311 A CN201811319311 A CN 201811319311A CN 109491611 A CN109491611 A CN 109491611A
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- memory
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- main memory
- metadata rule
- value
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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
-
- 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
-
- 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
Abstract
The invention discloses a kind of metadata rule methods, have used memory value including reading main memory pond；According to it is described with memory value judge the main memory pond whether low memory；If main memory pond low memory, starts spare memory pond, to carry out metadata rule using the main memory pond and the spare memory pond；And start timer, and when the timing length of the timer reaches timing threshold, I/O request, which is sent, to host replys.The metadata rule method, which can be effectively reduced, leads to the generation that metadata rule speed is relatively slow, can not reply the case where I/O request of host in time since storage system memory lacks；It avoids IO from hanging up, improves the reliability of metadata rule.The invention also discloses a kind of metadata rule device, equipment and computer readable storage mediums, all have above-mentioned beneficial effect.
Description
Technical field
The present invention relates to technical field of data storage, in particular to a kind of metadata rule method；Further relate to a kind of first number
According to rule device, equipment and computer readable storage medium.
Background technique
When host issues I/O request, storage system can be stored metadata into memory with the data structure of B+ tree.When interior
When data volume in depositing reaches lower brush threshold value, the metadata in memory can be brushed on disk down, i.e. metadata rule.If on disk
Existing metadata, first can merge the metadata in memory with the metadata on disk, then carry out brushing under data.Positive reason
Under condition, metadata rule will do it merging for internal memory tree and disk tree, and especially big in disk tree or storage system quickly generates
When a large amount of metadata, the I/O request that metadata rule speed is relatively slow, can not reply host in time can be generated, causes to lead
Machine stopping issues IO, and IO is caused to stop or even the generation of storage system time-out collapse case.
Therefore, how a kind of metadata rule scheme is provided, IO is avoided to hang up, the reliability for improving metadata rule is this
Field technical staff technical problem urgently to be resolved.
Summary of the invention
The object of the present invention is to provide a kind of metadata rule methods, can be avoided IO hang-up, improve metadata rule
Reliability；It is a further object of the present invention to provide a kind of metadata rule device, equipment and computer readable storage mediums,
With above-mentioned beneficial effect.
In order to solve the above technical problems, the present invention provides a kind of metadata rule methods, comprising:
That reads main memory pond has used memory value；
According to it is described with memory value judge the main memory pond whether low memory；
If main memory pond low memory, starts spare memory pond, to utilize the main memory pond and described spare
Memory pool carries out metadata rule；And start timer, and when the timing length of the timer reaches timing threshold, to master
Machine sends I/O request and replys.
Optionally, it is described according to memory value judge the main memory pond whether low memory, comprising:
Compare the size for having used memory value and preset threshold, whether judgement is described reaches described default with memory value
Threshold value；Wherein, the preset threshold is less than the memory size in the main memory pond；
If reaching, main memory pond low memory；
If not up to, main memory pond memory is sufficient.
Optionally, further includes:
It is inputted according to configuration, modifies the size of the timing threshold.
In order to solve the above technical problems, the present invention also provides a kind of metadata rule devices, comprising:
Read module has used memory value for read main memory pond；
Judgment module, for according to it is described with memory value judge the main memory pond whether low memory；
Starting module starts spare memory pond if being used for main memory pond low memory, to utilize the main memory
Pond and the spare memory pond carry out metadata rule；And start timer, and when the timing length of the timer reaches fixed
When threshold value when, to host send I/O request reply.
Optionally, the judgment module is specifically used for:
Compare the size for having used memory value and preset threshold, whether judgement is described reaches described default with memory value
Threshold value；Wherein, the preset threshold is less than the memory size in the main memory pond；
If reaching, main memory pond low memory；
If not up to, main memory pond memory is sufficient.
Optionally, further includes:
Modified module modifies the size of the timing threshold for inputting according to configuration.
In order to solve the above technical problems, the present invention also provides a kind of metadata rule equipment, comprising:
Memory, for storing computer program；
Processor realizes metadata rule side as described in any one of the above embodiments when in the execution computer program
The step of method.
In order to solve the above technical problems, the computer can the present invention also provides a kind of computer readable storage medium
It reads storage medium and is stored with computer program, the computer program is realized as described in any one of the above embodiments when being executed by processor
The step of metadata rule method.
Metadata rule method provided by the present invention has used memory value including reading main memory pond；According to it is described
With memory value judge the main memory pond whether low memory；If main memory pond low memory, starts spare memory pond,
To carry out metadata rule using the main memory pond and the spare memory pond；And start timer, and work as the timer
Timing length when reaching timing threshold, send I/O request to host and reply.
As it can be seen that metadata rule method provided by the present invention adds spare memory pond on the basis of main memory pond,
Storage system has used memory value by reading main memory pond, judge main memory pond whether low memory.And in main memory pond
When depositing deficiency, start spare memory pond, and then carry out metadata rule using main memory pond and spare memory pond, so as to have
Effect was reduced due to current time, the low memory in main memory pond and lead to that metadata rule speed is relatively slow, can not reply master in time
The generation of the case where I/O request of machine；In addition, starting timer, and determine when timer when the low memory in main memory pond
When constantly length reaches timing threshold, I/O request is sent to host and is replied, to realize negative-feedback, issues I/O request to reduce host
Speed, avoid I/O request from hanging up, improve metadata rule reliability.
Metadata rule device, equipment and computer readable storage medium provided by the present invention, all having above-mentioned has
Beneficial effect.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the flow diagram of metadata rule method provided by the embodiment of the present invention；
Fig. 2 is the schematic diagram of metadata rule device provided by the embodiment of the present invention；
Fig. 3 is the schematic diagram of metadata rule equipment provided by the embodiment of the present invention.
Specific embodiment
Core of the invention is to provide a kind of metadata rule method, can be avoided IO hang-up, improves metadata rule
Reliability；Another core of the invention is to provide a kind of metadata rule device, equipment and computer readable storage medium,
With above-mentioned beneficial effect.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is the flow diagram of metadata rule method provided by the embodiment of the present invention；With reference to Fig. 1
It is found that the metadata rule method includes:
S100: that reads main memory pond has used memory value；
S200: according to memory value judge main memory pond whether low memory；
Specifically, adding spare memory pond on the basis of storage system main memory pond.Storage system can be in real time from master
Memory value has been used in the relevant interface reading main memory pond of memory pool, and then has used memory value according to the main memory pond read
Judge main memory pond whether low memory.
Optionally, above-mentioned basis with memory value judge main memory pond whether low memory may include: used in
The size for depositing value and preset threshold, judges whether this reaches preset threshold with memory value；Wherein, preset threshold is less than main memory
The memory size in pond；If reaching, main memory pond low memory；If not up to, main memory pond memory is sufficient.
Specifically, preparatory settable suitable memory a reference value, i.e., above-mentioned preset threshold.Storage system is being read in main
Deposit pond used memory value on the basis of, further compare the size for having used memory value and preset threshold, judge that this has used in
Deposit whether value reaches preset threshold, if reaching, main memory pond low memory.On the contrary, if not up to, main memory pond memory fills
Foot.And in the present embodiment, preset threshold is less than the memory capacity in main memory pond.Then, can memory in main memory pond it is complete
Before occupancy, just start spare memory pond, to further increase the reliability of metadata rule.For example, the memory in main memory pond
Capacity is 400M, and preset threshold 350 reaches 350M with memory value when main memory pond, and when not up to 400M, that is, start
Spare memory pond.Certainly, for the specific value of above-mentioned preset threshold, the present invention is not specifically limited, can be according to practical need
Carry out otherness setting.
S300: if main memory pond low memory, starts spare memory pond, with using main memory pond and spare memory pond into
Row metadata rule；And start timer, and when the timing length of timer reaches timing threshold, I/O request is sent to host
It replys.
Specifically, if main memory pond low memory, starts spare memory pond, to pass through main memory pond and spare memory
Pond carries out metadata rule together.Metadata can be written to main memory pond and spare memory pond, and when main memory pond with it is spare
When amount of metadata in memory pool reaches lower brush threshold value, by brush under the metadata in main memory pond and spare memory pond to disk.
In addition, storage system starts timer, and when the timing length of timer reaches when judging main memory pond there are when low memory
Timing threshold, for example, sending I/O request when reaching 30s to host and replying.And timing threshold is not up in the timing length of timer
When value, then I/O request is not sent to host and replied.
On the contrary, any restrictions can not be done to the processing speed of things if main memory pond memory is sufficient, receiving host
I/O request normally handle.
Further, metadata rule is completed when main memory pond and spare memory, after releasing memory, main memory pond has again
There is sufficient memory headroom, at this point, storage system can close spare memory pond and timer, next I/O request is by leading
Memory pool is normally handled, until the case where low memory occurs again in main memory pond.
Wherein, for the particular number in the spare memory pond added in storage system, the present invention does not do unique restriction equally,
Appropriate number of spare memory pond can be needed to be arranged in conjunction with practical application.
In conclusion metadata rule method provided by the present invention adds spare memory on the basis of main memory pond
Pond, storage system have used memory value by reading main memory pond, judge main memory pond whether low memory.And in main memory pond
When low memory, start spare memory pond, and then carry out metadata rule using main memory pond and spare memory pond, so as to
Effectively reducing leads to the I/O request that metadata rule speed is relatively slow, can not reply host in time since storage system memory lacks
The case where generation；In addition, starting timer, and when the timing length of timer reaches fixed when main memory pond low memory
When threshold value when, to host send I/O request reply, to realize negative-feedback, to reduce the speed that host issues I/O request, avoid
I/O request is hung up, and the reliability of metadata rule is improved.
On the basis of the above embodiments: optional, which can also include: to be inputted according to configuration,
Modify the size of timing threshold.
Specifically, to give the more flexible usage experience of user, when user combines practical application request that need to change under host
When sending out the speed of I/O request, relevant configuration information can be inputted, so that storage system is inputted automatically according to configuration, modification timing
The size of threshold value, to meet actual needs.
The present invention also provides a kind of metadata rule device, the metadata rule device described below can with it is above
The metadata rule method of description corresponds to each other reference.Referring to FIG. 2, Fig. 2 is that metadata provided by the embodiment of the present invention is fallen
The schematic diagram of disk device；As shown in Figure 2, which may include:
Read module 10 has used memory value for read main memory pond；
Judgment module 20, for according to memory value judge main memory pond whether low memory；
Starting module 30 starts spare memory pond if being used for main memory pond low memory, to utilize main memory pond and standby
Metadata rule is carried out with memory pool；And start timer, and when the timing length of timer reaches timing threshold, to host
I/O request is sent to reply.
On the basis of the above embodiments, optionally, judgment module 20 is specifically used for:
The size of memory value and preset threshold is used, whether judgement reaches preset threshold with memory value；Wherein, in advance
If threshold value is less than the memory size in main memory pond；If reaching, main memory pond low memory；If not up to, in main memory pond
Deposit abundance.
On the basis of the above embodiments, optionally, further includes:
Modified module modifies the size of timing threshold for inputting according to configuration.
The present invention also provides a kind of metadata rule equipment, referring to FIG. 3, Fig. 3 is provided by the embodiment of the present invention
The schematic diagram of metadata rule equipment；From the figure 3, it may be seen that the metadata rule equipment may include memory 1 and processor 2.Its
In, memory 1, for storing computer program；Processor 2, realizes following steps when for executing computer program:
That reads main memory pond has used memory value；According to memory value judge main memory pond whether low memory；If main
Memory pool low memory then starts spare memory pond, to carry out metadata rule using main memory pond and spare memory pond；And it opens
Dynamic timer, and when the timing length of timer reaches timing threshold, I/O request, which is sent, to host replys.
The implementation of above-mentioned metadata rule method is please referred to for the introduction of metadata rule equipment provided by the present invention
Example, this will not be repeated here by the present invention.
The present invention also provides a kind of computer readable storage medium, calculating is stored on the computer readable storage medium
Machine program, the computer program realize following step when being executed by processor:
That reads main memory pond has used memory value；According to memory value judge main memory pond whether low memory；If main
Memory pool low memory then starts spare memory pond, to carry out metadata rule using main memory pond and spare memory pond；And it opens
Dynamic timer, and when the timing length of timer reaches timing threshold, I/O request, which is sent, to host replys.
The computer readable storage medium may include: USB flash disk, mobile hard disk, read-only memory (Read-Only
Memory, ROM), random access memory (Random Access Memory, RAM), magnetic or disk etc. is various to deposit
Store up the medium of program code.
Above method embodiment is please referred to for the introduction of computer readable storage medium provided by the present invention, the present invention
This will not be repeated here.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment, set
For standby and computer readable storage medium, since it is corresponded to the methods disclosed in the examples, so the comparison of description is simple
Single, reference may be made to the description of the method.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of this invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can directly be held with hardware, processor
The combination of capable software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable programmable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
Metadata rule method, apparatus provided by the present invention, equipment and computer readable storage medium are carried out above
It is discussed in detail.Used herein a specific example illustrates the principle and implementation of the invention, above embodiments
Explanation be merely used to help understand method and its core concept of the invention.It should be pointed out that for the common of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for technical staff, these
Improvement and modification also fall into the protection scope of the claims in the present invention.
Claims (8)
1. a kind of metadata rule method characterized by comprising
That reads main memory pond has used memory value；
According to it is described with memory value judge the main memory pond whether low memory；
If main memory pond low memory, starts spare memory pond, to utilize the main memory pond and the spare memory
Pond carries out metadata rule；And start timer, and when the timing length of the timer reaches timing threshold, it is sent out to host
I/O request is sent to reply.
2. metadata rule method according to claim 1, which is characterized in that described to be judged with memory value according to
The main memory pond whether low memory, comprising:
Compare the size for having used memory value and preset threshold, whether judgement is described reaches the default threshold with memory value
Value；Wherein, the preset threshold is less than the memory size in the main memory pond；
If reaching, main memory pond low memory；
If not up to, main memory pond memory is sufficient.
3. metadata rule method according to claim 2, which is characterized in that further include:
It is inputted according to configuration, modifies the size of the timing threshold.
4. a kind of metadata rule device characterized by comprising
Read module has used memory value for read main memory pond；
Judgment module, for according to it is described with memory value judge the main memory pond whether low memory；
Starting module starts spare memory pond if being used for main memory pond low memory, with using the main memory pond and
The spare memory pond carries out metadata rule；And start timer, and when the timing length of the timer reaches timing threshold
When value, I/O request is sent to host and is replied.
5. metadata rule device according to claim 4, which is characterized in that the judgment module is specifically used for:
Compare the size for having used memory value and preset threshold, whether judgement is described reaches the default threshold with memory value
Value；Wherein, the preset threshold is less than the memory size in the main memory pond；
If reaching, main memory pond low memory；
If not up to, main memory pond memory is sufficient.
6. metadata rule device according to claim 5, which is characterized in that further include:
Modified module modifies the size of the timing threshold for inputting according to configuration.
7. a kind of metadata rule equipment characterized by comprising
Memory, for storing computer program；
Processor realizes the metadata rule as described in any one of claims 1 to 3 when in the execution computer program
The step of method.
8. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey
Sequence, the computer program realize metadata rule method as described in any one of claims 1 to 3 when being executed by processor
Step.
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| CN201811319311.9A CN109491611B (en) | 2018-11-07 | 2018-11-07 | Metadata dropping method, device and equipment |
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| CN109491611B (en) | 2021-11-09 |
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