CN110780812B - Method and device for invalidating hard disk data - Google Patents
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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- 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
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- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
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Abstract
The invention discloses a method and a device for invalidating hard disk data, which comprise the following steps: establishing a buffer pool in a logic unit involved in writing data; when writing data, writing the data invalidation operation of the data physical address into a buffer pool; and in response to the buffer pool being full or the data invalidation operation of the data block concerned being written into the buffer pool completely, modifying the attribute of the data block in the memory according to the data block concerned by the data invalidation operation in the buffer pool, and emptying the buffer pool. The invention can reduce the memory access amount of the OBS when the hard disk is continuously written in, and improve the writing performance.
Description
Technical Field
The present invention relates to the field of data storage, and more particularly, to a method and an apparatus for invalidating hard disk data.
Background
The OBS (data invalidation) is based on PBA (data physical address), namely, the invalidation of each PBA triggers one OBS action, one OBS action generates 3 DDR (memory) operations, if n PBAs need to be invalidated, 3 × n DDR operations are needed, and when high-pressure sequential writing is carried out, a large amount of data invalidation actions are carried out, so that the access pressure to DDR is increased, the utilization rate of a processor is improved, and the sequential writing performance is reduced.
Aiming at the problem that the performance is affected by a large amount of OBS access memory generated by continuous writing of a hard disk in the prior art, no effective solution is available at present.
Disclosure of Invention
In view of this, an embodiment of the present invention provides a method and an apparatus for invalidating hard disk data, which can reduce the memory access amount of an OBS when a hard disk is continuously written, and improve the write performance.
In view of the above object, a first aspect of embodiments of the present invention provides a hard disk data invalidation method, including performing the following steps in response to continuously writing data to a flash memory:
establishing a buffer pool in a logic unit involved in writing data;
when writing data, writing the data invalidation operation of the data physical address into a buffer pool;
and in response to the buffer pool being full or the data invalidation operation of the data block concerned being written into the buffer pool completely, modifying the attribute of the data block in the memory according to the data block concerned by the data invalidation operation in the buffer pool, and emptying the buffer pool.
In some embodiments, establishing a buffer pool in the logical unit involved in writing the data comprises: establishing a plurality of buffer pools which work independently in each logic unit;
writing a data invalidate operation for a physical address of data into a buffer pool when writing the data comprises: data invalidating operations involving the same data block are written to the same buffer pool.
In some embodiments, the attributes of the data block include vdfbitmap, vdfc, and block info vdfc.
In some embodiments, modifying the attributes of the data block in the memory according to the data block involved in the data invalidate operation in the buffer pool comprises: determining the number of data invalidation operations related to the same data block in the buffer pool, clearing the vdfbitmap attribute of the same data block in the memory at one time, and respectively subtracting the number from the vdfc attribute and the block info vdfc attribute of the same data block.
In some embodiments, the method further comprises: in response to erasing a data block in the flash memory, the vdfbitmap attribute of the data block is set to 1, and the vdfc and block info vdfc attributes of the data block are respectively set to maximum values in the memory.
A second aspect of the embodiments of the present invention provides a hard disk data invalidation device, including:
a flash memory including a plurality of data blocks;
a processor; and
a memory storing program code executable by the processor, the program code when executed performing the following steps in response to continuously writing data to the flash memory:
establishing a buffer pool in a logic unit involved in writing data;
when writing data, writing the data invalidation operation of the data physical address into a buffer pool;
and in response to the buffer pool being full or the data invalidation operation of the data block concerned being written into the buffer pool completely, modifying the attribute of the data block in the memory according to the data block concerned by the data invalidation operation in the buffer pool, and emptying the buffer pool.
In some embodiments, establishing a buffer pool in the logical unit involved in writing the data comprises: establishing a plurality of buffer pools which work independently in each logic unit;
writing a data invalidate operation for a physical address of data into a buffer pool when writing the data comprises: data invalidating operations involving the same data block are written to the same buffer pool.
In some embodiments, the attributes of the data block include vdfbitmap, vdfc, and block info vdfc.
In some embodiments, modifying the attributes of the data block in the memory according to the data block involved in the data invalidate operation in the buffer pool comprises: determining the number of data invalidation operations related to the same data block in the buffer pool, clearing the vdfbitmap attribute of the same data block in the memory at one time, and respectively subtracting the number from the vdfc attribute and the block info vdfc attribute of the same data block.
In some embodiments, the apparatus further comprises: in response to erasing a data block in the flash memory, the vdfbitmap attribute of the data block is set to 1, and the vdfc and block info vdfc attributes of the data block are respectively set to maximum values in the memory.
The invention has the following beneficial technical effects: according to the method and the device for invalidating hard disk data, a buffer pool is established in a logic unit related to write-in data; when writing data, writing the data invalidation operation of the data physical address into a buffer pool; and in response to the fact that the buffer pool is full or the data invalidation operation of the related data block is completely written into the buffer pool, modifying the attribute of the data block in the memory according to the data block related to the data invalidation operation in the buffer pool, and emptying the buffer pool.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a hard disk data invalidation method according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments of the present invention are described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used for distinguishing two entities with the same name but different names or different parameters, and it should be noted that "first" and "second" are merely for convenience of description and should not be construed as limitations of the embodiments of the present invention, and they are not described in any more detail in the following embodiments.
In view of the foregoing, a first aspect of the embodiments of the present invention provides an embodiment of a hard disk data invalidation method capable of reducing a memory access amount of an OBS when a hard disk is continuously written. Fig. 1 is a schematic flow chart of a hard disk data invalidation method provided by the present invention.
The method for invalidating hard disk data, as shown in fig. 1, includes the following steps executed in response to continuous writing of data into the flash memory:
step S101: establishing a buffer pool in a logic unit involved in writing data;
step S103: when writing data, writing the data invalidation operation of the data physical address into a buffer pool;
step S105: and in response to the buffer pool being full or the data invalidation operation of the data block concerned being written into the buffer pool completely, modifying the attribute of the data block in the memory according to the data block concerned by the data invalidation operation in the buffer pool, and emptying the buffer pool.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), a Random Access Memory (RAM), or the like. Embodiments of the computer program may achieve the same or similar effects as any of the preceding method embodiments to which it corresponds.
In some embodiments, establishing a buffer pool in the logical unit involved in writing the data comprises: a plurality of buffer pools which work independently are established in each logic unit. Writing a data invalidate operation for a physical address of data into a buffer pool when writing the data comprises: data invalidating operations involving the same data block are preferably written to the same buffer pool.
In some embodiments, the attributes of the data block include vdfbitmap, vdfc, and block info vdfc.
In some embodiments, modifying the attributes of the data block in the memory according to the data block involved in the data invalidate operation in the buffer pool comprises: determining the number of data invalidation operations related to the same data block in the buffer pool, clearing the vdfbitmap attribute of the same data block in the memory at one time, and respectively subtracting the number from the vdfc attribute and the block info vdfc attribute of the same data block.
In some embodiments, the method further comprises: in response to erasing a data block in the flash memory, the vdfbitmap attribute of the data block is set to 1, and the vdfc and block info vdfc attributes of the data block are respectively set to maximum values in the memory.
The method disclosed according to an embodiment of the present invention may also be implemented as a computer program executed by a CPU, which may be stored in a computer-readable storage medium. The computer program, when executed by the CPU, performs the above-described functions defined in the method disclosed in the embodiments of the present invention. The above-described method steps and system elements may also be implemented using a controller and a computer-readable storage medium for storing a computer program for causing the controller to implement the functions of the above-described steps or elements.
Embodiments of the present invention are further illustrated below with reference to specific examples.
Each data block has three attributes of vdfbitmap, vdfc and block info vdfc, wherein vdfbitmap is used for identifying the effectiveness of a corresponding PBA in the data block, vdfc and block info vdfc are used for identifying the number of effective data in the data block, wherein vdfc can be stored when power is off and is mainly used for power-on recovery, block info vdfc is used for running and other attributes, and power is not stored when power is off. When one block erase is completed, vdfc and block info vdfc are set to maximum values, and vdfbitmap is set to 1. When a PBA is invalid, finding out the corresponding ddr address of three attributes of vdfbitmap, vdfc and block info vdfc of the corresponding data block, carrying out subtraction 1 operation on the data of vdfc and block info vdfc ddr, and carrying out XOR operation on the corresponding bit of vdfbitmap ddr, namely clearing zero. When the SSD (flash memory) executes sequential write, there are a large number of PBA invalidation operations, which obviously increases the efficiency requirement for the OBS, and if the OBS can be processed in batch and the access frequency of the memory is reduced, the processing efficiency of the OBS can be greatly improved.
The embodiment of the invention firstly creates a plurality of buffer pools for each logic unit, and then stores the buffer pools in the available buffer pools of the corresponding logic units when the OBS command of a certain PBA is received. A logical unit is a sub-structure of a data block. After the buffer pool is full (the buffer depth is self-defined), the OBS operation of all PBAs in the buffer pool is processed in a centralized mode, whether the PBAs belong to one data block or not is judged firstly, if yes, ddr subtraction operation of vdfc and block info vdfc is executed once, and the number of the PBAs is subtracted once. When the vdfbitmap clear operation is executed, the corresponding bits of these PBAs are subjected to a one-time exclusive-or operation. Therefore, if the depth of the buffer pool is 10, after batch processing, the access times of the DDR is reduced by 90%, the processing efficiency of the OBS is improved, and the sequential write performance is improved.
It can be seen from the foregoing embodiments that, in the method for invalidating hard disk data provided in the embodiments of the present invention, a buffer pool is established in a logical unit involved in writing data; when writing data, writing the data invalidation operation of the data physical address into a buffer pool; and in response to the fact that the buffer pool is full or the data invalidation operation of the related data block is completely written into the buffer pool, modifying the attribute of the data block in the memory according to the data block related to the data invalidation operation in the buffer pool, and emptying the buffer pool.
It should be particularly noted that, the steps in the above-mentioned embodiments of the method for invalidating hard disk data may be mutually intersected, replaced, added, or deleted, and therefore, these methods for invalidating hard disk data, which are reasonably transformed by permutation and combination, should also belong to the scope of the present invention, and should not limit the scope of the present invention to the above-mentioned embodiments.
In view of the foregoing, a second aspect of the embodiments of the present invention provides an embodiment of a hard disk data invalidation device capable of reducing the memory access amount of OBS when the hard disk is continuously written.
The hard disk data invalidation device comprises:
a flash memory including a plurality of data blocks;
a processor; and
a memory storing program code executable by the processor, the program code when executed performing the following steps in response to continuously writing data to the flash memory:
establishing a buffer pool in a logic unit involved in writing data;
when writing data, writing the data invalidation operation of the data physical address into a buffer pool;
and in response to the buffer pool being full or the data invalidation operation of the data block concerned being written into the buffer pool completely, modifying the attribute of the data block in the memory according to the data block concerned by the data invalidation operation in the buffer pool, and emptying the buffer pool.
In some embodiments, establishing a buffer pool in the logical unit involved in writing the data comprises: a plurality of buffer pools which work independently are established in each logic unit. Writing a data invalidate operation for a physical address of data into a buffer pool when writing the data comprises: data invalidating operations involving the same data block are preferably written to the same buffer pool.
In some embodiments, the attributes of the data block include vdfbitmap, vdfc, and block info vdfc.
In some embodiments, modifying the attributes of the data block in the memory according to the data block involved in the data invalidate operation in the buffer pool comprises: determining the number of data invalidation operations related to the same data block in the buffer pool, clearing the vdfbitmap attribute of the same data block in the memory at one time, and respectively subtracting the number from the vdfc attribute and the block info vdfc attribute of the same data block.
In some embodiments, the method further comprises: in response to erasing a data block in the flash memory, the vdfbitmap attribute of the data block is set to 1, and the vdfc and block info vdfc attributes of the data block are respectively set to maximum values in the memory.
It can be seen from the foregoing embodiments that, in the apparatus for invalidating hard disk data provided in the embodiments of the present invention, a buffer pool is established in a logical unit involved in writing data; when writing data, writing the data invalidation operation of the data physical address into a buffer pool; and in response to the fact that the buffer pool is full or the data invalidation operation of the related data block is completely written into the buffer pool, modifying the attribute of the data block in the memory according to the data block related to the data invalidation operation in the buffer pool, and emptying the buffer pool.
It should be particularly noted that, the above-mentioned embodiment of the hard disk data invalidation device adopts the embodiment of the hard disk data invalidation method to specifically describe the working process of each module, and those skilled in the art can easily think that these modules are applied to other embodiments of the hard disk data invalidation method. Of course, since the steps in the embodiment of the method for invalidating hard disk data may be intersected, replaced, added, or deleted, these reasonable permutation and combination transformations of the apparatus for invalidating hard disk data shall also belong to the scope of the present invention, and shall not limit the scope of the present invention to the embodiment.
The foregoing is an exemplary embodiment of the present disclosure, but it should be noted that various changes and modifications could be made herein without departing from the scope of the present disclosure as defined by the appended claims. The functions, steps and/or actions of the method claims in accordance with the disclosed embodiments described herein need not be performed in any particular order. Furthermore, although elements of the disclosed embodiments of the invention may be described or claimed in the singular, the plural is contemplated unless limitation to the singular is explicitly stated.
It should be understood that, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly supports the exception. It should also be understood that "and/or" as used herein is meant to include any and all possible combinations of one or more of the associated listed items. The numbers of the embodiments disclosed in the embodiments of the present invention are merely for description, and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, of embodiments of the invention is limited to these examples; within the idea of an embodiment of the invention, also technical features in the above embodiment or in different embodiments may be combined and there are many other variations of the different aspects of an embodiment of the invention as described above, which are not provided in detail for the sake of brevity. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present invention are intended to be included within the scope of the embodiments of the present invention.
Claims (8)
1. A method for invalidating hard disk data, applied to a flash memory, includes the following steps performed in response to successive writing of data to the flash memory:
establishing a buffer pool in a logic unit involved in writing data;
writing the data invalidation operation of the data physical address into the buffer pool when writing data;
in response to the buffer pool being full or the data invalidation operation of the data block concerned having been written into the buffer pool completely, modifying the attribute of the data block in the memory according to the data block concerned by the data invalidation operation in the buffer pool and emptying the buffer pool,
wherein establishing a buffer pool in the logical units involved in writing data comprises: establishing a plurality of buffer pools which respectively work independently in each logic unit;
and wherein writing a data invalidate operation for a physical address of data to the buffer pool when writing data comprises: data invalidating operations involving the same data block are written to the same buffer pool.
2. The method of claim 1, wherein the attributes of the data block include vdfbitmap, vdfc, and blockinfo vdfc.
3. The method of claim 2, wherein modifying the attributes of the data blocks in the memory according to the data blocks involved in the data invalidation operation in the buffer pool comprises:
determining the number of data invalidation operations related to the same data block in the buffer pool, clearing the vdfbitmap attribute of the same data block in an internal memory at one time, and subtracting the number from the vdfc attribute and the blockinfo vdfc attribute of the same data block respectively.
4. The method of claim 2, further comprising:
in response to erasing the data block in the flash memory, setting the vdfbitmap attribute of the data block to 1, and setting the vdfc attribute and the blockinfo vdfc attribute of the data block to maximum values, respectively, in the memory.
5. A hard disk data invalidation device, comprising:
a flash memory including a plurality of data blocks;
a processor; and
a memory storing program code executable by a processor, the program code when executed performing the following in response to continuously writing data to the flash memory:
establishing a buffer pool in a logic unit involved in writing data;
writing the data invalidation operation of the data physical address into the buffer pool when writing data;
in response to the buffer pool being full or the data invalidation operation of the data block concerned having been written into the buffer pool completely, modifying the attribute of the data block in the memory according to the data block concerned by the data invalidation operation in the buffer pool and emptying the buffer pool,
wherein establishing a buffer pool in the logical units involved in writing data comprises: establishing a plurality of buffer pools which respectively work independently in each logic unit;
and wherein writing a data invalidate operation for a physical address of data to the buffer pool when writing data comprises: data invalidating operations involving the same data block are written to the same buffer pool.
6. The apparatus of claim 5, wherein the attributes of the data block comprise vdfbitmap, vdfc, and blockinfo vdfc.
7. The apparatus of claim 6, wherein modifying the attributes of the data blocks in the memory according to the data blocks involved in the data invalidation operation in the buffer pool comprises:
determining the number of data invalidation operations related to the same data block in the buffer pool, clearing the vdfbitmap attribute of the same data block in an internal memory at one time, and subtracting the number from the vdfc attribute and the blockinfo vdfc attribute of the same data block respectively.
8. The apparatus of claim 6, further comprising:
in response to erasing the data block in the flash memory, setting the vdfbitmap attribute of the data block to 1, and setting the vdfc attribute and the blockinfo vdfc attribute of the data block to maximum values, respectively, in the memory.
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| CN101369253B (en) * | 2008-10-16 | 2012-01-25 | 凌阳科技股份有限公司 | Management method for flash memory conversion layer of free page in recovery abandoning area |
| CN102033812B (en) * | 2009-09-24 | 2013-04-10 | 慧荣科技股份有限公司 | Method for managing plurality of blocks of flash memory and relevant memory device and controller thereof |
| JP5708216B2 (en) * | 2011-05-09 | 2015-04-30 | ソニー株式会社 | Flash memory device, memory control device, memory control method, and storage system |
| CN103699337B (en) * | 2013-12-04 | 2017-01-18 | 华为技术有限公司 | Writing control method and system based on independent redundant array of independent disks (RAID) |
| CN109144422A (en) * | 2018-08-31 | 2019-01-04 | 浪潮电子信息产业股份有限公司 | A kind of data writing method of solid state hard disk, device, equipment and storage medium |
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| CN102789368A (en) * | 2012-06-21 | 2012-11-21 | 记忆科技(深圳)有限公司 | Solid-state hard disk, and data management method and system thereof |
| CN105677243A (en) * | 2015-12-31 | 2016-06-15 | 华为技术有限公司 | Data writing device and method |
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