CN102831088A - Data migration method and device based on mixing memory - Google Patents
Data migration method and device based on mixing memory Download PDFInfo
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- CN102831088A CN102831088A CN2012102642460A CN201210264246A CN102831088A CN 102831088 A CN102831088 A CN 102831088A CN 2012102642460 A CN2012102642460 A CN 2012102642460A CN 201210264246 A CN201210264246 A CN 201210264246A CN 102831088 A CN102831088 A CN 102831088A
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Abstract
The invention discloses a data migration method and a device based on a mixing memory. The data migration method comprises the following steps of: receiving a data write-back command; storing the data to be written back to an SSD (Solid State Disk) of storage equipment when access frequency of the data to be written back in cache equipment is larger than a preset frequency threshold value; storing the data to be written back to an HDD (Hard Disk Drive) of the storage equipment when an access sequence of the data to be written back in the cache equipment is larger than a preset sequence threshold value. The device performs a self-adaptive adjustment to the data stored in the mixing memory, and intelligently migrates a storage position of the data to be written back, so that an SSD loss is reduced to the maximum, an integral service life of the mixing memory is improved, and access delay is reduced, and moreover, resource storage is better utilized and access efficiency is improved.
Description
Technical field
The present invention relates to technical field of computer data storage, specially refer to data migration method and device based on mixing memory.
Background technology
In the cloud epoch, be that computational resource or storage resources are all focused on long-range data center, except the direct stores service of special intended for end consumers, all the other most of storage resources all can be directly in the face of the server among the data center.Along with the extensive growth and the server of mass data are used extensively and profoundly, a lot of important application such as transacter, weather forecast etc. all receive the restriction of bottom main memory and performance of storage system.Make full use of existing memory technology, improving existing main memory and memory system architecture is vital for improving the entire system performance.Solid state hard disc has multiple advantages, but has also that cost is high, capacity is low, writes characteristics such as limited service life.
Summary of the invention
Fundamental purpose of the present invention is that data migration method and the device based on mixing memory that a kind of cost is low, capacity greatly, effectively improves serviceable life is provided.
The present invention proposes a kind of data migration method based on mixing memory, comprises step:
Receive data and write back instruction;
When the access frequency of waiting to write back data in the buffer memory equipment during greater than the predeterminated frequency threshold value, with the said solid-state hard disk SSD of waiting to write back data storage to memory device;
When the access order property of waiting to write back data in the buffer memory equipment during greater than preset order property threshold value, with the said hard disk drive HDD that waits to write back data storage to memory device.
Preferably, said reception data also comprise after writing back the step of instruction:
Judge the said former memory location of waiting to write back data;
When judging said former memory location of waiting to write back data at said HDD, carry out said when the access frequency of waiting to write back data in the buffer memory equipment during greater than the predeterminated frequency threshold value, with the said step of waiting to write back the solid-state hard disk SSD of data storage to memory device;
When judging said former memory location of waiting to write back data at said SSD; Carry out said when the access order property of waiting to write back data in the buffer memory equipment during greater than preset order property threshold value, with the said step of waiting to write back the hard disk drive HDD of data storage to memory device.
Preferably, said when the access frequency of waiting to write back data in the buffer memory equipment during greater than the predeterminated frequency threshold value, the said step of waiting to write back the solid-state hard disk SSD of data storage to memory device is specifically comprised:
Judge that the said access frequency of waiting to write back data is whether greater than the predeterminated frequency threshold value of said SSD;
If then wait to write back data storage to said SSD with said;
If, then do not wait to write back data storage to said HDD with said.
Preferably, said when the access order property of waiting to write back data in the buffer memory equipment during greater than preset order property threshold value, the said step of waiting to write back the hard disk drive HDD of data storage to memory device is specifically comprised:
Judge that the said access order property of waiting to write back data is whether greater than the preset order property threshold value of said HDD;
If then wait to write back data storage to said HDD with said;
If, then do not wait to write back data storage to said SSD with said.
Preferably, said reception data also comprise before writing back the step of instruction: monitor said buffer memory equipment and memory device, and the canned data and the visit information of data in said buffer memory equipment and the memory device is stored in the visit information table;
The step that said reception data write back instruction also comprises afterwards: from said visit information table, obtain said canned data and the visit information of waiting to write back data.
The present invention also proposes a kind of data migration device based on mixing memory, comprising:
The command reception module is used to receive data and writes back instruction;
First transferring module, the access frequency that is used for waiting to write back data when buffer memory equipment are during greater than the predeterminated frequency threshold value, with the said solid-state hard disk SSD of waiting to write back data storage to memory device;
Second transferring module, the access order property that is used for waiting to write back data when buffer memory equipment are during greater than preset order property threshold value, with the said hard disk drive HDD that waits to write back data storage to memory device.
Preferably, said data migration device based on mixing memory also comprises:
Position judging module is used to judge the said former memory location of waiting to write back data;
Said first transferring module also is used for; When said position judging module is judged said former memory location of waiting to write back data at said HDD; Judge that the access frequency of waiting to write back data in the buffer memory equipment is greater than the predeterminated frequency threshold value, with the said solid-state hard disk SSD of waiting to write back data storage to memory device;
Said second transferring module also is used for; When said position judging module is judged said former memory location of waiting to write back data at said SSD; Judge that the access order property of waiting to write back data in the buffer memory equipment is greater than preset order property threshold value, with the said hard disk drive HDD that waits to write back data storage to memory device.
Preferably, said first transferring module specifically is used for:
Judge that the said access frequency of waiting to write back data is whether greater than the predeterminated frequency threshold value of said SSD;
If then wait to write back data storage to said SSD with said;
If, then do not wait to write back data storage to said HDD with said.
Preferably, said second transferring module specifically is used for:
Judge that the said access order property of waiting to write back data is whether greater than the preset order property threshold value of said HDD;
If then wait to write back data storage to said HDD with said;
If, then do not wait to write back data storage to said SSD with said.
Preferably, said data migration device based on mixing memory also comprises:
The monitoring and statistics module is used to monitor said buffer memory equipment and memory device, and the canned data and the visit information of data in said buffer memory equipment and the memory device is stored in the visit information table;
The information acquisition module is used for obtaining said canned data and the visit information of waiting to write back data from said visit information table.
The present invention is through the self-adaptation adjustment to storage data in the mixing memory; Carry out the intelligence migration with waiting the memory location that writes back data; To reduce the loss of SSD to greatest extent, improve the whole service life of mixing memory, reduce the visit time-delay; And can better utilize storage resources, improve access efficiency.
Description of drawings
Fig. 1 is the process flow diagram of first embodiment that the present invention is based on the data migration method of mixing memory;
Fig. 2 is the process flow diagram of second embodiment that the present invention is based on the data migration method of mixing memory;
Fig. 3 is the process flow diagram of the 3rd embodiment that the present invention is based on the data migration method of mixing memory;
Fig. 4 is the process flow diagram of the 4th embodiment that the present invention is based on the data migration method of mixing memory;
Fig. 5 is the structural representation of first embodiment that the present invention is based on the data migration device of mixing memory;
Fig. 6 is the structural representation of second embodiment that the present invention is based on the data migration device of mixing memory;
Fig. 7 is the structural representation of the 3rd embodiment that the present invention is based on the data migration device of mixing memory.
The realization of the object of the invention, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Mixing memory of the present invention comprises memory device and buffer memory equipment.Memory device comprises SSD (solid state disk; Solid state hard disc) and HDD (Hard Disk Drive, hard disk drive), since SSD have fast and read, lowly postpone, write characteristics such as loss; Therefore SSD being used for storage reads frequently to write the few data of number of times; Buffer memory equipment comprises DRAM (Dynamic Random Access Memory, dynamic RAM) and PCM (phase change memory, phase transition storage); The PCM capacity is bigger, and the DRAM capacity is less, because the read rate of PCM and DRAM is more or less the same; But there is the loss problem of writing in PCM; Its limited service life, so PCM is more suitable for storing and reads frequent data, writes frequent data and then mainly is stored in DRAM.The present invention has combined the advantage of each storage chip in the mixing memory, has carried out holistic approach and design at aspects such as the built-in function distribution of mixing memory, the layout that reads and writes data and data migtations, and specific embodiment is following.
As shown in Figure 1, Fig. 1 is the process flow diagram of first embodiment that the present invention is based on the data migration method of mixing memory, and the data migration method based on mixing memory that this embodiment mentions comprises step:
Step S101 receives data and writes back instruction;
Step S102 is when the access frequency of waiting to write back data in the buffer memory equipment during greater than the predeterminated frequency threshold value, with the solid-state hard disk SSD of waiting to write back data storage to memory device;
Read owing to SSD has fast, hang down delay, write loss, therefore, its performance has determined SSD to be more suitable for the high data of memory access frequency, can effectively reduce access time delay.
Step S103 is when the access order property of waiting to write back data in the buffer memory equipment during greater than preset order property threshold value, with the hard disk drive HDD that waits to write back data storage to memory device.
Because the existence of prefetch mechanisms, the high data storage of access order property is in HDD, but the better utilization storage resources, and equilibrium utilizes each memory device.
Present embodiment is through the self-adaptation adjustment to storage data in the mixing memory; Carry out the intelligence migration with waiting the memory location that writes back data; To reduce the loss of SSD to greatest extent, improve the whole service life of mixing memory, reduce the visit time-delay; And can better utilize storage resources, improve access efficiency.
As shown in Figure 2, Fig. 2 is the process flow diagram of second embodiment that the present invention is based on the data migration method of mixing memory.
Step S201 receives data and writes back instruction;
Step S202 judges the former memory location of waiting to write back data;
Step S203 when former memory location that judgement waits to write back data during at HDD, and when the access frequency of waiting to write back data in the buffer memory equipment during greater than the predeterminated frequency threshold value, will wait to write back data storage to SSD;
For the to be write back data of former memory location at HDD, consider SSD have fast read, the low characteristics that postpone, write loss, its performance has determined SSD to be more suitable for the high data of memory access frequency, can effectively reduce access time delay.Therefore, according to the data access frequency configuration frequency threshold of statistics, access frequency is write back SSD greater than the data of frequency threshold.
Step S204 when former memory location that judgement waits to write back data during at SSD, and when the access order property of waiting to write back data in the buffer memory equipment during greater than preset order property threshold value, will wait to write back data storage to HDD.
For the to be write back data of former memory location at SSD, consider the existence of prefetch mechanisms, the high data storage of access order property is in HDD, but the better utilization storage resources, equilibrium utilizes each memory device.Therefore, the succession threshold value is set, access order property is write back HDD greater than the data of real-time threshold value according to the data access sequences property of statistics.
Present embodiment has taken into full account the reading fast of SSD, the low characteristics that postpone and the prefetch mechanisms of HDD, helps reducing the loss of mixing memory, improves whole service life, reduces the visit time-delay, and can better utilize storage resources, improves access efficiency.
As shown in Figure 3, Fig. 3 is the process flow diagram of the 3rd embodiment that the present invention is based on the data migration method of mixing memory.
Step S301 receives data and writes back instruction;
Step S302 judges the former memory location of waiting to write back data;
Step S311 when former memory location that judgement waits to write back data during at HDD, judges that whether the access frequency of waiting in the buffer memory equipment to write back data is greater than the predeterminated frequency threshold value; If, execution in step S321 then; If deny, then execution in step S322;
Former memory location is judged in the data to be write back of the HDD frequency that conducts interviews, access frequency is write back SSD greater than the data of frequency threshold, still write back former memory location, can effectively reduce access time delay less than the data of frequency threshold.
Step S312 when former memory location that judgement waits to write back data during at SSD, judges that the access order property of waiting to write back data in the buffer memory equipment is during whether greater than preset order property threshold value; If, execution in step S322 then; If deny, then execution in step S321;
Judge in the data to be write back of the SSD succession that conducts interviews for former memory location; Access order property is write back HDD greater than the data of real-time threshold value; Data less than the succession threshold value still write back former memory location, but the better utilization storage resources, and equilibrium utilizes each memory device.
Step S321 is with the solid-state hard disk SSD of waiting to write back data storage to memory device;
Step S322 is with the hard disk drive HDD that waits to write back data storage to memory device.
Present embodiment has taken into full account the reading fast of SSD, the low characteristics that postpone and the prefetch mechanisms of HDD, helps reducing the loss of mixing memory, improves whole service life, reduces the visit time-delay, and can better utilize storage resources, improves access efficiency.
As shown in Figure 4, Fig. 4 is the process flow diagram of the 4th embodiment that the present invention is based on the data migration method of mixing memory.
Step S401 monitors buffer memory equipment and memory device, and the canned data and the visit information of data in buffer memory equipment and the memory device is stored in the visit information table;
The former storage device type that canned data comprises data (for example; 0 expression data are from SSD; 1 expression data are from HDD) and buffer memory device type (for example, 0 expression PCM, 1 expression DRAM); Visit information comprises the visit information situation (for example, the read operation frequency counting of data, write operation frequency counting, hit operating frequency counting, miss operating frequency counting etc.) of data.The data layout of each data and visit situation in the dynamic monitoring mixing memory comprise the canned data and the visit information of data, and relevant information is written in the visit information table.Simultaneously, also can threshold value be set, to determine whether to carry out data migtation according to the result who adds up in the visit information table.
Step S402 receives data and writes back instruction;
Step S403 obtains canned data and the visit information of waiting to write back data from the visit information table.
Carrying out data when writing back, dynamic canned data and the visit information that from the visit information table, obtains data, when data access frequency or access order property surpass assign thresholds, trigger data migration instruction.
Step S404 according to canned data, judges the former memory location of waiting to write back data;
Step S411 when former memory location that judgement waits to write back data during at HDD, according to visit information, judges that whether the access frequency of waiting in the buffer memory equipment to write back data is greater than the predeterminated frequency threshold value; If, execution in step S421 then; If deny, then execution in step S422;
Step S412 when former memory location that judgement waits to write back data during at SSD, according to visit information, judges that the access order property of waiting to write back data in the buffer memory equipment is during whether greater than preset order property threshold value; If, execution in step S422 then; If deny, then execution in step S421;
Step S421 is with the solid-state hard disk SSD of waiting to write back data storage to memory device;
Step S422 is with the hard disk drive HDD that waits to write back data storage to memory device.
Present embodiment, is treated the memory location that writes back data and is carried out the self-adaptation adjustment according to the canned data and the visit information of data in the visit information table through dynamically updating the visit information table; Carry out the intelligence migration with waiting the memory location that writes back data; To reduce the loss of SSD to greatest extent, improve the whole service life of mixing memory, reduce the visit time-delay; And can better utilize storage resources, improve access efficiency.
As shown in Figure 5, Fig. 5 is the structural representation of first embodiment that the present invention is based on the data migration device of mixing memory, and the data migration device based on mixing memory that this embodiment mentions comprises:
First transferring module 20, the access frequency that is used for waiting to write back data when buffer memory equipment are during greater than the predeterminated frequency threshold value, with the solid-state hard disk SSD of waiting to write back data storage to memory device;
In the present embodiment, read owing to SSD has fast, hang down delay, write loss, therefore, its performance has determined SSD to be more suitable for the high data of memory access frequency, can effectively reduce access time delay; Simultaneously, because the existence of prefetch mechanisms, the high data storage of access order property is in HDD, but the better utilization storage resources, and equilibrium utilizes each memory device.Therefore; Present embodiment is through the self-adaptation adjustment of storage data in first transferring module 20 and 30 pairs of mixing memories of second transferring module, intelligence carried out in the memory location of waiting to write back data move, to reduce the loss of SSD to greatest extent; Improve the whole service life of mixing memory; Reduce the visit time-delay, and can better utilize storage resources, improve access efficiency.
As shown in Figure 6, Fig. 6 is the structural representation of second embodiment that the present invention is based on the data migration device of mixing memory.Data migration device based on mixing memory also comprises:
First transferring module 20 also is used for; When position judging module 40 judges that the former memory location of waiting to write back data is during at HDD; Judge that the access frequency of waiting to write back data in the buffer memory equipment is greater than the predeterminated frequency threshold value, with the solid-state hard disk SSD of waiting to write back data storage to memory device;
The former memory location that present embodiment is judged for position judging module 40 is in the data to be write back of HDD; Consider SSD have fast read, the low characteristics that postpone, write loss; Its performance has determined SSD to be more suitable for the high data of memory access frequency, can effectively reduce access time delay, therefore; According to the data access frequency configuration frequency threshold of statistics, access frequency is write back SSD greater than the data of frequency threshold through first transferring module 20.Simultaneously, the existence of prefetch mechanisms is considered in the data to be write back of SSD in the former memory location of judging for position judging module 40, and the high data storage of access order property is in HDD, but the better utilization storage resources, and equilibrium utilizes each memory device.Therefore, the succession threshold value is set, access order property is write back HDD greater than the data of real-time threshold value through second transferring module 30 according to the data access sequences property of statistics.Present embodiment has taken into full account the reading fast of SSD, the low characteristics that postpone and the prefetch mechanisms of HDD, helps reducing the loss of mixing memory, improves whole service life, reduces the visit time-delay, and can better utilize storage resources, improves access efficiency.
In the embodiment of the invention, first transferring module 20 specifically is used for:
Judge that the access frequency wait to write back data is whether greater than the predeterminated frequency threshold value of SSD;
If then will wait to write back data storage to SSD;
If, then will not wait to write back data storage to HDD.
Judge that the access order property wait to write back data is whether greater than the preset order property threshold value of HDD;
If then will wait to write back data storage to HDD;
If, then will not wait to write back data storage to SSD.
Present embodiment is judged in the data to be write back of the HDD frequency that conducts interviews through 20 pairs of former memory locations of first transferring module; Access frequency is write back SSD greater than the data of frequency threshold; Data less than frequency threshold still write back former memory location, can effectively reduce access time delay.Simultaneously; Judge in the data to be write back of the SSD succession that conducts interviews through 30 pairs of former memory locations of second transferring module; Access order property is write back HDD greater than the data of real-time threshold value; Data less than the succession threshold value still write back former memory location, but the better utilization storage resources, and equilibrium utilizes each memory device.Present embodiment has taken into full account the reading fast of SSD, the low characteristics that postpone and the prefetch mechanisms of HDD, helps reducing the loss of mixing memory, improves whole service life, reduces the visit time-delay, and can better utilize storage resources, improves access efficiency.
As shown in Figure 7, Fig. 7 is the structural representation of the 3rd embodiment that the present invention is based on the data migration device of mixing memory.Data migration device based on mixing memory also comprises:
Monitoring and statistics module 50 is used to monitor buffer memory equipment and memory device, and the canned data and the visit information of data in buffer memory equipment and the memory device is stored in the visit information table;
The former storage device type that the canned data of present embodiment comprises data (for example; 0 expression data are from SSD; 1 expression data are from HDD) and buffer memory device type (for example, 0 expression PCM, 1 expression DRAM); Visit information comprises the visit information situation (for example, the read operation frequency counting of data, write operation frequency counting, hit operating frequency counting, miss operating frequency counting etc.) of data.Through the data layout and the visit situation of each data in the monitoring and statistics module 50 dynamic monitoring mixing memories, comprise the canned data and the visit information of data, and relevant information is written in the visit information table.Simultaneously, also can threshold value be set, to determine whether to carry out data migtation according to the result who adds up in the visit information table.Carrying out data when writing back, information acquisition module 60 dynamic canned data and the visit informations that from the visit information table, obtain data, when data access frequency or access order property surpass assign thresholds, trigger data migration instruction.Present embodiment, is treated the memory location that writes back data and is carried out the self-adaptation adjustment according to the canned data and the visit information of data in the visit information table through dynamically updating the visit information table; Carry out the intelligence migration with waiting the memory location that writes back data; To reduce the loss of SSD to greatest extent, improve the whole service life of mixing memory, reduce the visit time-delay; And can better utilize storage resources, improve access efficiency.
The above is merely the preferred embodiments of the present invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes instructions of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. the data migration method based on mixing memory is characterized in that, comprises step:
Receive data and write back instruction;
When the access frequency of waiting to write back data in the buffer memory equipment during greater than the predeterminated frequency threshold value, with the said solid-state hard disk SSD of waiting to write back data storage to memory device;
When the access order property of waiting to write back data in the buffer memory equipment during greater than preset order property threshold value, with the said hard disk drive HDD that waits to write back data storage to memory device.
2. the data migration method based on mixing memory according to claim 1 is characterized in that, the step that said reception data write back instruction also comprises afterwards:
Judge the said former memory location of waiting to write back data;
When judging said former memory location of waiting to write back data at said HDD, carry out said when the access frequency of waiting to write back data in the buffer memory equipment during greater than the predeterminated frequency threshold value, with the said step of waiting to write back the solid-state hard disk SSD of data storage to memory device;
When judging said former memory location of waiting to write back data at said SSD; Carry out said when the access order property of waiting to write back data in the buffer memory equipment during greater than preset order property threshold value, with the said step of waiting to write back the hard disk drive HDD of data storage to memory device.
3. the data migration method based on mixing memory according to claim 2; It is characterized in that; Said when the access frequency of waiting to write back data in the buffer memory equipment during greater than the predeterminated frequency threshold value, the said step of waiting to write back the solid-state hard disk SSD of data storage to memory device is specifically comprised:
Judge that the said access frequency of waiting to write back data is whether greater than the predeterminated frequency threshold value of said SSD;
If then wait to write back data storage to said SSD with said;
If, then do not wait to write back data storage to said HDD with said.
4. the data migration method based on mixing memory according to claim 2; It is characterized in that; Said when the access order property of waiting to write back data in the buffer memory equipment during greater than preset order property threshold value, the said step of waiting to write back the hard disk drive HDD of data storage to memory device is specifically comprised:
Judge that the said access order property of waiting to write back data is whether greater than the preset order property threshold value of said HDD;
If then wait to write back data storage to said HDD with said;
If, then do not wait to write back data storage to said SSD with said.
5. according to claim 3 or 4 described data migration methods based on mixing memory; It is characterized in that; The step that said reception data write back instruction also comprises before: monitor said buffer memory equipment and memory device, and the canned data and the visit information of data in said buffer memory equipment and the memory device is stored in the visit information table;
The step that said reception data write back instruction also comprises afterwards: from said visit information table, obtain said canned data and the visit information of waiting to write back data.
6. the data migration device based on mixing memory is characterized in that, comprising:
The command reception module is used to receive data and writes back instruction;
First transferring module, the access frequency that is used for waiting to write back data when buffer memory equipment are during greater than the predeterminated frequency threshold value, with the said solid-state hard disk SSD of waiting to write back data storage to memory device;
Second transferring module, the access order property that is used for waiting to write back data when buffer memory equipment are during greater than preset order property threshold value, with the said hard disk drive HDD that waits to write back data storage to memory device.
7. the data migration device based on mixing memory according to claim 6 is characterized in that, also comprises:
Position judging module is used to judge the said former memory location of waiting to write back data;
Said first transferring module also is used for; When said position judging module is judged said former memory location of waiting to write back data at said HDD; Judge that the access frequency of waiting to write back data in the buffer memory equipment is greater than the predeterminated frequency threshold value, with the said solid-state hard disk SSD of waiting to write back data storage to memory device;
Said second transferring module also is used for; When said position judging module is judged said former memory location of waiting to write back data at said SSD; Judge that the access order property of waiting to write back data in the buffer memory equipment is greater than preset order property threshold value, with the said hard disk drive HDD that waits to write back data storage to memory device.
8. the data migration device based on mixing memory according to claim 7 is characterized in that, said first transferring module specifically is used for:
Judge that the said access frequency of waiting to write back data is whether greater than the predeterminated frequency threshold value of said SSD;
If then wait to write back data storage to said SSD with said;
If, then do not wait to write back data storage to said HDD with said.
9. the data migration device based on mixing memory according to claim 7 is characterized in that, said second transferring module specifically is used for:
Judge that the said access order property of waiting to write back data is whether greater than the preset order property threshold value of said HDD;
If then wait to write back data storage to said HDD with said;
If, then do not wait to write back data storage to said SSD with said.
10. according to Claim 8 or 9 described data migration device, it is characterized in that, also comprise based on mixing memory:
The monitoring and statistics module is used to monitor said buffer memory equipment and memory device, and the canned data and the visit information of data in said buffer memory equipment and the memory device is stored in the visit information table;
The information acquisition module is used for obtaining said canned data and the visit information of waiting to write back data from said visit information table.
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