CN103810114A - Method and device for distributing storage space - Google Patents
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- CN103810114A CN103810114A CN201410083434.2A CN201410083434A CN103810114A CN 103810114 A CN103810114 A CN 103810114A CN 201410083434 A CN201410083434 A CN 201410083434A CN 103810114 A CN103810114 A CN 103810114A
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Abstract
The invention relates to a method and a device for distributing a storage space. The method comprises the following steps: receiving a query file storage information request message sent by an application, wherein the query file storage information request message comprises file information; searching a file corresponding to the file information and searching an identification number corresponding to the file; analyzing the identification number, and according to a result obtained by analyzing the identification number, acquiring storage information of a storage block occupied by the file on a storage; sending the storage information to the application, so that the application carries out classification on the storage block according to the storage information, and distributes the classified storage block to a read-write request according to continuity of the read-write request of the application. Therefore, the effect of enabling the application to know continuity of the storage space is realized and a speed that the application reads and writes disk data can be effectively improved.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to method and the device in a kind of memory allocated space.
Background technology
The Main Bottleneck of disk database operation is the read or write speed of database data, and the reason that is difficult to improve database data read or write speed is the continuity that database is not known file, and pre-reading and writing buffer memory, the function such as to write continuously influenced.
In prior art, in the time that database need to be read and write processing, first send read-write requests message to kernel, after kernel receives read-write requests message, start disk and read and write processing, in the time of database reading out data, return to data to be read from disk to application cache; In the time that database writes data, data to be written are directly write in disk, and do not go to understand the continuity of storage space, easily like this cause related data deposit position discontinuous on disk, thereby have a strong impact on the read or write speed of disk database.
Summary of the invention
The embodiment of the present invention provides method and the device in a kind of memory allocated space, has solved the inefficient problem of application program read-write data in magnetic disk.
First aspect, provides the method in a kind of memory allocated space, and the method comprises:
Receive the inquiry file storage information request message that application program sends, described inquiry file storage information request message comprises fileinfo;
Search the corresponding file of described fileinfo, and search the identification number that described file is corresponding;
Resolve described identification number, according to the result of resolving described identification number, obtain the storage information of described file shared storage block on storer;
Send described storage information to described application program, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests.
According to first aspect, in the possible implementation of the first of first aspect, described fileinfo is specially file name, described in search the corresponding file of described fileinfo, and search the identification number that described file is corresponding and comprise:
Check that whether described file name is legal, if described file name is legal, searches the corresponding file of described file name and whether exist, if described file exists, search according to described file name the identification number that described file is corresponding.
According to first aspect, in the possible implementation of the second of first aspect, described fileinfo is specially file handle, described in search the corresponding file of described fileinfo, and search the identification number that described file is corresponding and comprise:
From the management of process module of described operating system, search the corresponding file of described file handle according to described file handle, and search the identification number that described file is corresponding.
According to any implementation in above-mentioned two kinds of implementations of first aspect or first aspect, in the third implementation of first aspect, described file system is resolved described identification number, according to the result of resolving described identification number, the storage information of obtaining described file shared storage block on storer comprises:
Resolve described identification number, according to the result of resolving described identification number, obtain the information of all storage blocks that described file takies on described storer, the information of described all storage blocks comprises the information of many group storage blocks, wherein, the information of every group of storage block comprises: the storage block number that the initial address message (IAM) of this group storage block and this group storage block comprise.
According to the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect, describedly send described storage information to described application program, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests to comprise:
Send described storage information to described application program, so that the size of the storage block number that described application program comprises according to described every group of storage block and default storage block, determine total size of described every group of storage block, and according to total size of described every group of storage block, described each group of storage block classified, and according to the continuity of the read-write requests of described application program, sorted storage block is distributed to described read-write requests.
Second aspect, provides the device in a kind of memory allocated space, and this device comprises: receiving element, search unit, processing unit and transmitting element;
Described receiving element, the inquiry file storage information request message sending for receiving application program, described inquiry file storage information request message comprises fileinfo;
The described unit of searching, the corresponding file of described fileinfo receiving for searching described receiving element, and search the identification number that described file is corresponding;
Described processing unit is searched the described identification number that unit is searched described in resolving, and according to the result of resolving described identification number, obtains the storage information of described file shared storage block on storer;
Described transmitting element, for sending to described application program the described storage information that described processing unit obtains, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests.
According to second aspect, in the possible implementation of the first of second aspect, described in search unit specifically for:
Check that whether described file name is legal, if described file name is legal, searches the corresponding file of described file name and whether exist, if described file exists, search according to described file name the identification number that described file is corresponding.
According to second aspect, in the possible implementation of the second of second aspect, described in search unit specifically for:
From the management of process module of described operating system, search the corresponding file of described file handle according to described file handle, and search the identification number that described file is corresponding.
According to any implementation in above-mentioned two kinds of implementations of second aspect or second aspect, in the third implementation of second aspect, described processing unit specifically for:
Resolve described identification number, according to the result of resolving described identification number, obtain the information of all storage blocks that described file takies on described storer, the information of described all storage blocks comprises the information of many group storage blocks, wherein, the information of every group of storage block comprises: the storage block number that the initial address message (IAM) of this group storage block and this group storage block comprise.
According to the third possible implementation of second aspect, in the 4th kind of possible implementation of second aspect, described transmitting element specifically for:
Send described storage information to described application program, so that the size of the storage block number that described application program comprises according to described every group of storage block and default storage block, determine total size of described every group of storage block, and according to total size of described every group of storage block, described each group of storage block classified, and according to the continuity of the read-write requests of described application program, sorted storage block is distributed to described read-write requests.
Method and the device in the memory allocated space that the embodiment of the present invention provides, receive the inquiry file storage information request message that application program sends, and described inquiry file storage information request message comprises fileinfo; Search the corresponding file of described fileinfo, and search the identification number that described file is corresponding; Resolve described identification number, according to the result of resolving described identification number, obtain the storage information of described file shared storage block on storer; Send described storage information to described application program, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests.Realized thus the continuity that allows application program understand storage space, and according to the feature of read-write requests, classification is used storage space, thereby has effectively improved the read or write speed of application program to data in magnetic disk.
Accompanying drawing explanation
Fig. 1 is Posix file system schematic diagram provided by the invention;
The method flow diagram in the memory allocated space that Fig. 2 provides for the embodiment of the present invention one;
The application program that Fig. 3 provides for the embodiment of the present invention one is obtained the schematic diagram of storage space information;
The method flow diagram in the memory allocated space that Fig. 4 provides for the embodiment of the present invention two;
The device schematic diagram in the memory allocated space that Fig. 5 provides for the embodiment of the present invention three.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
In embodiment provided by the invention, describe as an example of Posix file system example, Posix file system schematic diagram provided by the invention shown in Figure 1, in Fig. 1, file system layer increases blocks of files module (FileBlock) newly, this module is a part for the built-in function of file system, and a part for file file system interface can directly be obtained file physical location; Increase file physical location system call interfaces at operating system layer, for instance, can define two kinds of system call interfaces: 1) int GetFileBlock_name(const char*pathname, char*buf, int size); 2) int GetFileBlock_fd(const int fd, char*buf, int size); Wherein, parameter p athname in the first interface shape represents the path of operating system to the file of file system transmission, this path comprises the file name of file, the first address of each storage block group that parameter b uf sensing file system is returned to application program, the number of storage block in the each group of storage block that parameter s ize represents to return, above-mentioned storage block can be disk block; Data block spider module, according to the physical identification number of file correspondence in storage block, utilizes the disk management rule of file system to resolve above-mentioned physical identification number, returns to whole storage blocks that above-mentioned file takies on storer; Whether file handle administration module, comprise this file handle in management of process module according to file handle fd, finally find the physical identification number of fd correspondence in storage block.
The method flow diagram in the memory allocated space that Fig. 2 provides for the embodiment of the present invention one.The executive agent of described method can be file system.As shown in Figure 2, described method specifically comprises:
S210, receives the inquiry file storage information request message that application program sends, and described inquiry file storage information request message comprises file name.
The application program that the embodiment of the present invention one shown in Figure 3 provides is obtained the schematic diagram of storage space information, in Fig. 3, first in the newly-increased system call interfaces of system call layer: int GetFileBlock_name(const char*pathname, char*buf, int size) or int GetFileBlock_fd(const int fd, char*buf, int size), application program or be specially database and send to file system by the interface function (by parameter p athname) that calls aforesaid operations system the request message of inquiry file storage information, this inquiry file storage information request message comprises the routing information of file, the routing information of this file comprises file name, wherein, file corresponding to above-mentioned file name can be data file, also can be journal file.
Whether S220, checks that described file name is legal, if described file name is legal, searches file corresponding to described file name and exist, if described file exists, searches according to described file name the identification number that described file is corresponding.
In Fig. 3, the NameSpace module of file system is obtained the file name in this routing information after receiving the routing information of file of above-mentioned application program or database transmission, is exemplified as, and this file name is character string; Then whether this file name of NameSpace module check is legal; In the time that above-mentioned file name is legal, NameSpace module is searched the file that whether comprises that this file name is corresponding in this locality according to above-mentioned file name, in the time finding the corresponding file of this file name, NameSpace module sends to above-mentioned file name the index of metadata module of file system, index of metadata module, according to this file name, is searched identification number corresponding to file corresponding to this file name.
S230, resolves described identification number, according to the result of resolving described identification number, obtains the storage information of described file shared storage block on storer.
Particularly, identification number described in the index of metadata module parses of described file system, according to the result of resolving described identification number, obtain the information of all storage blocks that described file takies on described storer, the information of described all storage blocks comprises the information of many group storage blocks, wherein, the information of every group of storage block comprises: the storage block number that the initial address message (IAM) of this group storage block and this group storage block comprise.
For instance, above-mentioned storer is disk, the disk block that storage block is divided for disk, and the above-mentioned identification number getting is on disk No. inode of file; Above-mentioned file system is ext3 file system, according to the rule of ext3 file system, can correspond to array i_block[EXT3_N_BLOCKS by No. inode], this array comprises above-mentioned No. inode, the first index value and the second index value, wherein, this is for No. inode a shaping number, has identified uniquely the disk block address of storing partial data in above-mentioned file; The first index value is a Pointer, deposits the start address of one group of continuous disk block of partial data in above-mentioned file on this pointed disk; The second index value is a second rank pointer, and this pointer can point to again multiple different Pointers, and each Pointer points to again the start address of depositing one group of continuous disk block of partial data in above-mentioned file on disk; Particularly, according to above-mentioned the first index value and the second index value, just can get the information of many group disk blocks, wherein, the information of every group of disk block comprises: the disk block number that the initial address message (IAM) of this group disk block and this group disk block comprise, is made up of the information of all disk blocks the information of above-mentioned many group disk blocks.
S240, send described storage information to described application program, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests.
Particularly, the size of the storage block number that application program comprises according to described every group of storage block and default storage block, determine total size of described every group of storage block, and according to total size of described every group of storage block, described each group of storage block classified, and according to the continuity of the read-write requests of described application program, sorted storage block is distributed to described read-write requests.
In Fig. 3, after file system gets the information of each group of disk block, the information of above-mentioned each group of disk block is returned to application program or database, by the storage engines in application program or database, the each group of disk block returning classified, be specially, the disk block that disk is divided logically all has fixed size, be exemplified as, can be 4KB, according to disk block number and the default size of above-mentioned disk block that in the information of every group of disk block, this group disk block comprises, just can obtain total size of every group of disk block; Above-mentioned storage engines is according to total size of every group of disk block; each group of disk block classified, be exemplified as, altogether comprise three groups of disk blocks: the information of first group of disk block comprises: first address is 200KB; altogether comprise 2 disk blocks, total size of first group of disk block is 8KB; The information of second group of disk block comprises: first address is 512KB, altogether comprises 16 disk blocks, and total size of second group of disk block is 64KB; The information of the 3rd group of disk block comprises: first address is 768KB, altogether comprises 128 disk blocks, and total size of the 3rd group of disk block is 512KB; Above-mentioned disk block can be divided into three classes: the size of the first kind is 8KB, and the size of Equations of The Second Kind is 64KB, and the size of the 3rd class is 512KB.Application program or database root are distributed to described read-write requests according to the continuity of read-write requests by sorted storage block, particularly, because the data file random read-write in database is more, and when the data page of data file is smaller, preferentially from the grouping of minidisk piece, distribute disk block, be exemplified as: from first kind disk stripping, distribute disk block, thus, may be greater than file system smallest allocation unit for page of data in data file time, presents system can be alignd in advance, avoids across piece; When the journal file in database is all continuous read-write, when data block is larger, preferentially from large disk block grouping, distribute disk block, be exemplified as, from the 3rd class disk block grouping, distribute disk block; In the time that disk block is not enough, allow large disk block to be split as little disk block, or little disk block is merged into continuous in logic large disk block use, still, now need to point out the continuity deficiency of subscriber data file or journal file.
The method flow diagram in the memory allocated space that Fig. 4 provides for the embodiment of the present invention two.The executive agent of described method can be file system.As shown in Figure 4, described method specifically comprises:
S410, receives the inquiry file storage information request message that application program sends, and described inquiry file storage information request message comprises file handle.
Referring to Fig. 3, first in the newly-increased system call interfaces of system call layer: int GetFileBlock_name(const char*pathname, char*buf, int size) or int GetFileBlock_fd(const int fd, char*buf, int size), application program or be specially the interface function (by parameter p athname) of database by calling aforesaid operations system to file system Transmit message handle, wherein, the file that this file handle is corresponding can be data file, can be also journal file.
S420 searches the corresponding file of described file handle, and searches the identification number that described file is corresponding from the management of process module of described operating system according to described file handle.
For instance, in Fig. 3, after file system receives the file handle fd of above-mentioned application program or database transmission, from the task structure of the current task of the management of process module management of operating system, search and whether contain this file handle fd according to this file handle, herein, in application program, the file handle of all files of opening is all documented in task structure, wherein, file and file handle are the relations of one-to-many, the i.e. corresponding multiple file handles of file, can be unique according to one of them file handle find out a file; Particularly, in the time that file system finds file handle fd from task structure, just can from management of process module, find according to this fd the relevant information of the file corresponding with fd, be exemplified as, the relevant information of this file can be documented in the file structure of management of process module, and file structure comprises parameter address_space, wherein, in the inode field of parameter address_space, record and above-mentioned file corresponding identification number on storer, therefore, just can find according to above-mentioned file handle the identification number that this file is corresponding.
S430-S440 is identical with step S230-S240.
The device schematic diagram in the memory allocated space that Fig. 5 provides for the embodiment of the present invention three, described device is for the method shown in execution graph 2 or Fig. 4.As shown in Figure 5, this device comprises: receiving element 501, search unit 502, processing unit 503 and transmitting element 504.
Described receiving element 501, the inquiry file storage information request message sending for receiving application program, described inquiry file storage information request message comprises fileinfo.
The described unit 502 of searching, the corresponding file of described fileinfo receiving for searching described receiving element 501, and search the identification number that described file is corresponding.
Alternatively, described search unit 502 specifically for: check that whether described file name legal, if described file name is legal, searches the corresponding file of described file name and whether exist, if described file exists, search according to described file name the identification number that described file is corresponding.
Alternatively, described in, search unit 502 specifically for: from the management of process module of described operating system, search the corresponding file of described file handle according to described file handle, and search the identification number that described file is corresponding.
Described processing unit 503 is searched the described identification number that unit 502 is searched described in resolving, and according to the result of resolving described identification number, obtains the storage information of described file shared storage block on storer.
Alternatively, described processing unit 503 specifically for: resolve described identification number, according to the result of resolving described identification number, obtain the information of all storage blocks that described file takies on described storer, the information of described all storage blocks comprises the information of many group storage blocks, wherein, the information of every group of storage block comprises: the storage block number that the initial address message (IAM) of this group storage block and this group storage block comprise.
Described transmitting element 504, for sending to described application program the described storage information that described processing unit 503 obtains, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests.
Alternatively, described transmitting element 504 specifically for: send described storage information to described application program, so that the size of the storage block number that described application program comprises according to described every group of storage block and default storage block, determine total size of described every group of storage block, and according to total size of described every group of storage block, described each group of storage block classified, and according to the continuity of the read-write requests of described application program, sorted storage block is distributed to described read-write requests.
The device that the embodiment of the present invention provides has been implanted the method that the embodiment of the present invention one provides, and therefore, the specific works process of device provided by the invention, does not repeat again at this.
To sum up, the disk stripping information that above-mentioned file system can export be used, can derive logical memory space, make application program or database can know the continuity of the storage space that file is corresponding, according to the continuity of storage space, support application program or database use buddy algorithm managed storage space, guarantee the physics continuity of file, realize that optimization data storehouse journal file is read and write continuously, data file fritter random read-write object.
It should be noted that, in the embodiment of the present invention, describe as an example of disk file system example, but be not limited to disk file system, for SSD, memory file system or require in harsh scene in continuity, can adopt equally this programme.
Professional should further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software is clearly described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can realize described function with distinct methods to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection domain being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the method in memory allocated space, is characterized in that, described method comprises:
Receive the inquiry file storage information request message that application program sends, described inquiry file storage information request message comprises fileinfo;
Search the corresponding file of described fileinfo, and search the identification number that described file is corresponding;
Resolve described identification number, according to the result of resolving described identification number, obtain the storage information of described file shared storage block on storer;
Send described storage information to described application program, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests.
2. method according to claim 1, is characterized in that, described fileinfo is specially file name, described in search the corresponding file of described fileinfo, and search the identification number that described file is corresponding and comprise:
Check that whether described file name is legal, if described file name is legal, searches the corresponding file of described file name and whether exist, if described file exists, search according to described file name the identification number that described file is corresponding.
3. method according to claim 1, is characterized in that, described fileinfo is specially file handle, described in search the corresponding file of described fileinfo, and search the identification number that described file is corresponding and comprise:
From the management of process module of described operating system, search the corresponding file of described file handle according to described file handle, and search the identification number that described file is corresponding.
4. according to the arbitrary described method of claim 1-3, it is characterized in that, the described identification number of described parsing, according to the result of resolving described identification number, the storage information of obtaining described file shared storage block on storer comprises:
Resolve described identification number, according to the result of resolving described identification number, obtain the information of all storage blocks that described file takies on described storer, the information of described all storage blocks comprises the information of many group storage blocks, wherein, the information of every group of storage block comprises: the storage block number that the initial address message (IAM) of this group storage block and this group storage block comprise.
5. method according to claim 4, it is characterized in that, send described storage information to described application program, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests to comprise:
Send described storage information to described application program, the size of the storage block number comprising according to described every group of storage block in order to described application program and default storage block, determine total size of described every group of storage block, and according to total size of described every group of storage block, described each group of storage block classified, and according to the continuity of the read-write requests of described application program, sorted storage block is distributed to described read-write requests.
6. the device in memory allocated space, is characterized in that, described device comprises: receiving element, search unit, processing unit and transmitting element;
Described receiving element, the inquiry file storage information request message sending for receiving application program, described inquiry file storage information request message comprises fileinfo;
The described unit of searching, the corresponding file of described fileinfo receiving for searching described receiving element, and search the identification number that described file is corresponding;
Described processing unit is searched the described identification number that unit is searched described in resolving, and according to the result of resolving described identification number, obtains the storage information of described file shared storage block on storer;
Described transmitting element, for sending to described application program the described storage information that described processing unit obtains, so that described application program classifies to storage block according to described storage information, and make described application program, according to the continuity of the read-write requests of described application program, sorted storage block be distributed to described read-write requests.
7. device according to claim 6, is characterized in that, described in search unit specifically for:
Check that whether described file name is legal, if described file name is legal, searches the corresponding file of described file name and whether exist, if described file exists, search according to described file name the identification number that described file is corresponding.
8. device according to claim 6, is characterized in that, described in search unit specifically for:
From the management of process module of described operating system, search the corresponding file of described file handle according to described file handle, and search the identification number that described file is corresponding.
9. according to the arbitrary described device of claim 6-8, it is characterized in that, described processing unit specifically for:
Resolve described identification number, according to the result of resolving described identification number, obtain the information of all storage blocks that described file takies on described storer, the information of described all storage blocks comprises the information of many group storage blocks, wherein, the information of every group of storage block comprises: the storage block number that the initial address message (IAM) of this group storage block and this group storage block comprise.
10. device according to claim 9, is characterized in that, described transmitting element specifically for:
Send described storage information to described application program, so that the size of the storage block number that described application program comprises according to described every group of storage block and default storage block, determine total size of described every group of storage block, and according to total size of described every group of storage block, described each group of storage block classified, and according to the continuity of the read-write requests of described application program, sorted storage block is distributed to described read-write requests.
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