CN103500206A - Storage method and device based on file storage data - Google Patents
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Abstract
The invention relates to the field of data storage, in particular to a storage method and device based on file storage data. The method comprises the steps that storage files and auxiliary files are established in an operation system, wherein the storage files comprise data files and index files, the auxiliary files comprise empty byte filling arrays and idle index lists; data records to be stored are received; the data records are stored to the data files in a fixed-length-byte mode according to the auxiliary files; an index record of each data record is generated, and the index records are stored to the index files, wherein the index records have fixed lengths. According to the storage method and device, high-concurrency and high-efficiency reading and writing can be carried out, storage is fully used, too much programming is avoided, and a wide using range is achieved.
Description
Technical field
The present invention relates to field of data storage, relate in particular to storage means and device based on file storage data.
Background technology
Be accompanied by the development of the increasingly mature and IT application in enterprise of computer information technology, being stored in IT application in enterprises of dynamic data has a very important role.
At present, in data exchange system, or in infosystem dynamic data storage commonly used based on relevant database.Date storage method based on relevant database comprises: the data recording that obtains the needs storage; Described data recording is stored, by the fixed length size data, stored or be stored in by serialized object in the tables of data of relevant database by row, and the single-row or multiple row in database table is created to index record, form index, so that the data recording of processing said data file.
Yet the date storage method based on relevant database exists following deficiency: the middleware mandate of database is expensive and need extra programming, causes implementation cost and maintenance cost higher; The index record built for whole tables of data causes in data storage procedure efficiency lower.
Summary of the invention
In view of this, the embodiment of the present invention provides storage means and the device based on file storage data, reduces implementation cost and maintenance cost.
On the one hand, the embodiment of the present invention provides the storage means based on file storage data, and described method comprises:
Create storage file and secondary file in operating system, wherein, described storage file comprises data file and index file, and described secondary file comprises null byte filling array and idle index;
Receive data recording to be stored;
Store described data recording into described data file with the byte form of regular length according to described secondary file;
Generate respectively the index record of each described data recording, and store described index record into described index file, wherein, described index record has regular length.
Further, describedly create storage file and secondary file comprises in operating system:
Receive the length of the storage unit of the title of described data file and described data file;
Length according to the storage unit of the title of described data file and described data file, create described data file and described index file in operating system, wherein said data file is for storing described data recording, and described data file is consistent with described index file title;
Build null byte and fill array, the length of described null byte filling array equals the length of the storage unit of described data file;
Build idle index according to described index file, wherein, the memory location of described idle index for obtaining described data file.
Further, described reception data recording to be stored also comprises afterwards:
Described data recording is converted into to the byte form;
Obtain first idle index number from described idle index, and described first idle index number is deleted from described idle index;
Navigate to the memory location of described first idle index number in described data file.
Further, described when according to described secondary file, described data recording being stored into to described data file and also comprises that length when the described data recording of actual storage is less than the length of storage unit of described data file with the byte form of regular length, the partial bytes of using described null byte to fill array is filled described storage unit.
Further, upgrade the last item index record described comprising after described index record is stored in described index file.
Further, the content of described index record comprises the index number of next data record of the index number of upper data record of the state of described data recording, described data recording and described data recording.
Accordingly, the embodiment of the present invention has also proposed the memory storage based on file storage data, and described device comprises:
Create storage file and secondary file module, in operating system, creating storage file and secondary file, wherein, described storage file comprises data file and index file, and described secondary file comprises null byte filling array and idle index;
Receive data recordin module, for receiving data recording to be stored;
The storage data recordin module, for storing described data recording into described data file with the byte form of regular length according to described secondary file;
Be divided into and store the index record module, for generating respectively the index record of each described data recording, and storing described index record into described index file, wherein, described index record has regular length.
Further, described establishment storage file and secondary file module comprise:
Receive the configuration parameter module, for the length of the storage unit of the title that receives described data file and described data file;
Create file module, length for the storage unit according to the title of described data file and described data file, create described data file and described index file in operating system, wherein said data file is for storing described data recording, and described data file is consistent with described index file title;
Build null byte filler pack module, for building null byte, fill array, the length of described null byte filling array equals the length of described storage unit;
Build idle index module, for according to described index file, building idle index, wherein, the memory location of described idle index for obtaining described data file.
Further, described device also comprises:
The data record format conversion module, for being converted into the byte form by described data recording;
Idle index number retrieval module for from described idle index, obtaining first idle index number, and is deleted described first idle index number from described idle index;
The memory location locating module, for navigating to the memory location of described first idle index number in described data file.
Further, described storage data recordin module also comprises the null byte packing module, while being less than the length of storage unit of described data file for the length when the described data recording of actual storage, use the partial bytes of described null byte filling array to fill described storage unit.
Further, the described index record module that generates and stores also comprises renewal the last item index record module, for upgrading the last item index record.
Further, the content of described index record comprises the index number of next data record of the index number of upper data record of the state of described data recording, described data recording and described data recording.
Storage means and device based on file storage data that the embodiment of the present invention proposes, there is following features: at first, adopt the data file storage to need data or the infosystem of exchange to move required dynamic data, and can pass through simple API(Application Programming Interface, application programming interface) carry out the concurrent and efficient read-write of height, avoid too much programming, and usable range is widely arranged; Secondly, every data record have one simply, very little index record, so just can navigate to efficiently data recording; In addition, in data file, be by bytes store, so both can storing character string, also can store serialized object, improved its scope of application.
The accompanying drawing explanation
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is the realization flow figure of the storage means based on file storage data in first embodiment of the invention;
Fig. 2 is the data recording schematic diagram of storing in data file;
Fig. 3 is the index record schematic diagram of storing in index file;
Fig. 4 is the schematic diagram of index record;
Fig. 5 is the realization flow figure according to the delet method based on file storage data of first embodiment of the invention;
Fig. 6 is the realization flow figure according to the memory storage based on file storage data of third embodiment of the invention;
Fig. 7 is the schematic diagram according to the memory storage based on file storage data of third embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, only show part related to the present invention in accompanying drawing but not full content.
The first embodiment of the present invention has been shown in Fig. 1-Fig. 4.
Fig. 1 is that details are as follows for this realization flow 100 according to the realization flow 100 of the storage means based on file storage data of first embodiment of the invention:
In step 101, create storage file and secondary file in operating system, wherein, described storage file comprises data file and index file, described secondary file comprises null byte filling array and idle index.
In the first embodiment, the data storage customers end creates storage file, secondary file and memory interface in operating system, and wherein, storage file comprises data file and index file.Data file is for storing data recording, and index file is for the index record of the storage information of storing data recording.Fig. 2 is the data recording schematic diagram of storing in data file, and in data file, the length of every data record is fixed, and the storage unit of data file has fixing length.Assess and determine according to actual application scenarios, the length that data recording is set is the approaching value of maximum length value in required deal with data set, and data recording is stored in data file with unordered random storage mode.Fig. 3 is the index record schematic diagram of storing in index file, the index record set that index file has regular length with unordered random storage mode storage.Index record is corresponding one by one with data recording, and each data record has an index record that records its storage information.Fig. 4 is the schematic diagram of index record, and index record comprises the index number (next index number) of next record of the index number (a upper index number) of a upper record of state, data recording of data recording and data recording.Because data-recording status in index record is that (data-recording status is that false means that data recording is used to Boolean type, true means that data recording is not used) take a byte, a upper index number and next index number and be long, all take 8 bytes, therefore, index record has the regular length of 17 bytes.
In operating system, at first initialization storage file and secondary file comprise the following steps:, the length of the title of the data file that the outside programming of reception is set and the storage unit of data file; Secondly, build and open data file with read-write mode immediately according to the length of the storage unit of the title of described data file and described data file, synchronous build and open the index file consistent with described data file name with read-write mode immediately, wherein, the file suffixes of described data file and described index file is different, as the index file suffix is idx, the data file suffix is mdf; Again, build the byte of padding array, wherein, the content of described byte of padding array is null byte, its length is consistent with the length of storage unit in data file, purpose is when data recording stores in data file, if the data recording physical length is less than the data record size of data set configuration, will use the partial bytes of this byte of padding array to be filled; Finally, build idle index according to described index file.Build in the process of idle index, if index file is empty file, idle index is empty, otherwise, the traversal index file, read all index records, if the data-recording status of index record is false, add in idle index, idle index be configured to conventional processing fast, it is available can simply by index file, calculating those recording indexes numberings, in addition, in order to complete efficiently the initialization of memory storage, here the IO(Input/Output that needs independent use buffer memory, input or output) operation, what be the data-recording status in those index records in index file false adds in idle index.
In step 102, receive data recording to be stored.
In completing steps 101, after the storage file initialization, memory storage, just in serviceable condition, can receive data recording to be stored, and wherein said data recording can be any data, comprises text, byte stream and picture etc.
In step 103, according to described secondary file, store described data recording into described data file with the byte form of regular length.
Before storing data recording into data file, also comprise the following steps; Memory interface is converted into the byte form by described data recording, further, is converted into the UTF form; Obtain first idle index number from described idle index, and described first idle index number is deleted from described idle index; Navigate to the memory location of described first idle index number in described data file, realize by the length that first idle index number is multiplied by storage unit in data file.
During by described data recording data writing file, also need to deduct by the length of every actual input record the byte length of storage unit in data file, when result is not 0, be the length of the described data recording of actual storage while being less than the length of described storage unit, use the partial bytes of described byte of padding array to fill described storage unit.
In step 104, generate respectively the index record of each described data recording, and store described index record into described index file, wherein, described index record has regular length.
Memory interface generates respectively an index record according to each described data recording.Thereby first idle index number is multiplied by the sequence number memory location that index record length 17 obtains first idle index number, and navigate to first idle index number sequence number memory location by the random position mode.And then write the index record corresponding with described data recording in indexed file, wherein, the index number that the value of whether using the sign of this data recording is the last item data recording for false and a upper index number, the index number of next data record is-1 simultaneously.Side by side, the index number that next index number of upgrading the last item index record is current record, i.e. described first idle index number, the index number that the index number that the last item record is set is current record.
First embodiment of the invention is that to utilize storage file in operating system be data file and index file storage data recording, and the storage unit of described data file has regular length, building respectively an index record for each data recording is stored in index file, so just can navigate to efficiently the memory location of certain data record and described certain data record, simultaneously, data are recorded in data file by bytes store, so both can storing character string, also can store serialized object, improve the scope of application.In addition, the first embodiment of the present invention, adopt the storage file storage data recording in operating system, only need simple api interface to carry out the concurrent and efficient read-write of height, effectively avoided in the process based on relational data library storage data needing a large amount of extra programmings and follow-up program maintenance, thereby effectively reduced cost of development.
Figure 5 illustrates the second embodiment of the present invention.
Fig. 5 is that details are as follows for this realization flow 500 according to the realization flow 500 of the delet method based on file storage data of first embodiment of the invention:
In step 501, receive the sequence number of data recording to be deleted.
The embodiment of the present invention is applied to synchronously delete data recording in storage file and the index record of described data recording, and wherein storage file comprises data file and index file.Described data recording and index record are stored in respectively in data file and index file, and data recording is stored in data file with the byte form of regular length, with sequence number identification data record.Index number that the index number of a upper record of state, the data recording of data recording that comprises index record goes up next record of an index number, data recording is next index number, wherein, data-recording status is Boolean type (data-recording status is that false represents that this data recording is not used or is used for true represents this data recording), data recording equipment takies a byte, a upper index number and next index number and is long, all take 8 bytes, so index record length is fixed as 17 bytes.The storage of storage file record, be not orderly, but record stored into to available position.
Receive the sequence number of data recording to be deleted, can navigate to fast the index record of described data recording and described data recording, and then lay the groundwork for efficiently completing this data recording of deletion.
In step 502, according to the sequence number of described data recording to be deleted, synchronously delete described data recording and upgrade the upper data record of described data recording or the index record of next data record.
Every the data record all has an index record of answering in contrast.Due to a upper index number that contains data recording in index record and next index number of data recording, need to upgrade the index record that upper data record or next data records that described data recording is adjacent while therefore deleting described data recording.
According to the sequence number of described data recording to be deleted, delete as follows respectively described data recording, and the synchronous index record be associated that upgrades:
Article one data recording and for the last item data recording in the data file that data recording to be deleted is its place, be in data file when unique data record, article one data recording and the last item data recording in described data file be set and be-1.
When data recording to be deleted for article one data recording in the data file at its place but while not being the last item data recording, proceed as follows: read next index number in article one index record from the index file consistent with described data file name; Obtain corresponding next index record of next index number and next data record according to described next index number; Described next data record is set to article one data recording; A upper index number in described next index record is set to-1.
When data recording to be deleted for the last item data recording in the data file at its place but while not being article one data recording, proceed as follows: read the upper index number in the last item index record from the index file consistent with described data file name; Obtain the corresponding upper index record of a upper index number and a upper data record according to a described upper index number; Described upper data record is set to the last item data recording; Next index number in a described upper index record is set to-1.
In the data file that data recording to be deleted is its place, neither for article one data recording, simultaneously neither the last item data recording the time, proceed as follows: from read index record corresponding to described data recording to be deleted the consistent index file of described data file name in a upper index number and next index number; Locate respectively and read a described upper index record and next index record according to a described upper index number and next index number, the index number that next index number in a described upper index record is next data record is set, the index number that a upper index number of next index record is upper data record.
In step 503, the index record that reads described data recording to be deleted in indexed file, it is false that data-recording status in this index record is set.
In data file after delete data record, read the index record of described data recording to be deleted in the index file consistent with described data file name, data-recording status in described index record is set for using, is set to Boolean type data false.
In step 504, add the index number of described index record in idle index.
After delete data record, discharged the storage unit of this data recording.The index record of described data recording numbering is added in free list, so that new data recording can be used the storage unit of release.
Step 501 to step 504 is applicable to delete a part of data recording, and wherein, described data recording is stored in the device that is the file storage.If during all data recording in the deletion data storage device, by following simple operations, can realize: the length that data file and index file synchronously are set is 0 and gets final product, in addition the idle index number in the idle index of situation.
Be below the device embodiment of the embodiment of the present invention, embodiment of the method for the present invention and device embodiment belong to same design, and the detail content of detailed description not in device embodiment, can be with reference to said method embodiment.
In Fig. 6 and Fig. 7, the third embodiment of the present invention has been shown.
Fig. 6 is the realization flow 600 according to the memory storage based on file storage data of third embodiment of the invention, the realization flow 600 be somebody's turn to do, and details are as follows for this device 600:
This device comprises: create storage file and secondary file module 601, for in operating system, creating storage file and secondary file, wherein, described storage file comprises data file and index file, and described secondary file comprises null byte filling array and idle index; Receive data recordin module 602, for receiving data recording to be stored; Storage data recordin module 603, for storing described data recording into described data file with the byte form of regular length according to described secondary file; Be divided into and store index record module 604, for generating respectively the index record of each described data recording, and storing described index record into described index file, wherein, described index record has regular length.
This device also comprises: the data record format conversion module, for described data recording is converted into to the byte form; Idle index number retrieval module for from described idle index, obtaining first idle index number, and is deleted described first idle index number from described idle index; The memory location locating module, for navigating to the memory location of described first idle index number in described data file.
Further, described establishment storage file and secondary file module 601 comprise: receive the configuration parameter module, for the length of the storage unit of the title that receives described data file and described data file; Create file module, length for the storage unit according to the title of described data file and described data file, create described data file and described index file in operating system, wherein said data file is for storing described data recording, and described data file is consistent with described index file title; Build null byte filler pack module, for building null byte, fill array, the length of described null byte filling array equals the length of described storage unit; Build idle index module, for according to described index file, building idle index, wherein, described idle index is for the memory location of the described data file of effective acquisition.
Further, described storage data recordin module 603 also comprises the null byte packing module, while for the length when the described data recording of actual storage, being less than the length of described storage unit, use the partial bytes of described null byte filling array to fill described storage unit.The described index record module 604 that generates and stores also comprises renewal the last item index record module, for upgrading the last item index record.
Referring to Fig. 7, this memory storage is stored data recording and record externally is provided at this device by memory interface and fetch interface respectively.A kind of implementation of fetch interface reads data log is according to the index number reads data log, and the index number of take is parameter, returns to data recording to be read; Another implementation is to be similar to walker Iterator in the Java array for data storage device provides, and the user can carry out more easily data recording and browse encapsulation, reduces user's programing work amount.Whether walker provides next record operation, also has next operation and remove data recording operation, and all these operations are synchronous operation, guarantee the consistance of data.
Further, this memory storage also comprises the data recording walker, can provide more easily for the user.
Further, this memory storage can also comprise that the data recording sum arranges module, be used to data storage device to increase the record sum that data file can be preserved, can effectively avoid like this because mass data writes, causing data file excessive, write fashionable, if the record sum that the data recording quantity exceedance in data file configures according to memory storage, can report to the police and refuse to store data recording, also can wipe the oldest data, and write data into the position of old data.
Further, this device can also comprise that data file name drives and return to module, for the operation of returning to the memory storage example according to data file name is provided, and convenient like this multi-thread concurrent data access application scenarios.
This device also comprises the identification module of whether closing, and for arranging whether close this data storage device, the content of this identification module is that the Boolean type data are true or false.If in the time of need to closing data storage device, only this need be set and be designated true, and close data file and index file gets final product.After memory storage cuts out, the follow-up all subsequent manipulations to the data memory storage all is not performed, and the data of can dishing out read abnormal prompting.
The present invention is based on the file storage needs data or the infosystem of exchange to move required dynamic data, and can carry out the concurrent and efficient read-write of height by simple API, avoid too much extra programming, effectively reduce the implementation cost of storage data and be maintained as, and usable range is very widely arranged.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious variations, readjust and substitute and can not break away from protection scope of the present invention.Therefore, although by above embodiment, the present invention is described in further detail, the present invention is not limited only to above embodiment, in the situation that do not break away from the present invention's design, can also comprise more other equivalent embodiment, and scope of the present invention is determined by appended claim scope.
Claims (12)
1. the storage means based on file storage data, is characterized in that, described method comprises:
Create storage file and secondary file in operating system, wherein, described storage file comprises data file and index file, and described secondary file comprises null byte filling array and idle index;
Receive data recording to be stored;
Store described data recording into described data file with the byte form of regular length according to described secondary file;
Generate respectively the index record of each described data recording, and store described index record into described index file, wherein, described index record has regular length.
2. method according to claim 1, is characterized in that, describedly creates storage file and secondary file comprises in operating system:
Receive the length of the storage unit of the title of described data file and described data file;
Length according to the storage unit of the title of described data file and described data file, create described data file and described index file in operating system, wherein said data file is for storing described data recording, and described data file is consistent with described index file title;
Build null byte and fill array, the length of described null byte filling array equals the length of the storage unit of described data file;
Build idle index according to described index file, wherein, the memory location of described idle index for obtaining described data file.
3. method according to claim 1, is characterized in that, described reception data recording to be stored also comprises afterwards:
Described data recording is converted into to the byte form;
Obtain first idle index number from described idle index, and described first idle index number is deleted from described idle index;
Navigate to the memory location of described first idle index number in described data file.
4. method according to claim 1, it is characterized in that, described when according to described secondary file, described data recording being stored into to described data file and also comprises that length when the described data recording of actual storage is less than the length of storage unit of described data file with the byte form of regular length, the partial bytes of using described null byte to fill array is filled described storage unit.
5. method according to claim 1, is characterized in that, upgrade the last item index record described comprising after described index record is stored in described index file.
6. method according to claim 1, is characterized in that, the content of described index record comprises the index number of next data record of the index number of upper data record of the state of described data recording, described data recording and described data recording.
7. the memory storage based on file storage data, is characterized in that, described device comprises:
Create storage file and secondary file module, in operating system, creating storage file and secondary file, wherein, described storage file comprises data file and index file, and described secondary file comprises null byte filling array and idle index;
Receive data recordin module, for receiving data recording to be stored;
The storage data recordin module, for storing described data recording into described data file with the byte form of regular length according to described secondary file;
Be divided into and store the index record module, for generating respectively the index record of each described data recording, and storing described index record into described index file, wherein, described index record has regular length.
8. device according to claim 7, is characterized in that, described establishment storage file and secondary file module comprise:
Receive the configuration parameter module, for the length of the storage unit of the title that receives described data file and described data file;
Create file module, length for the storage unit according to the title of described data file and described data file, create described data file and described index file in operating system, wherein said data file is for storing described data recording, and described data file is consistent with described index file title;
Build null byte filler pack module, for building null byte, fill array, the length of described null byte filling array equals the length of described storage unit;
Build idle index module, for according to described index file, building idle index, wherein, the memory location of described idle index for obtaining described data file.
9. device according to claim 7, is characterized in that, described device also comprises:
The data record format conversion module, for being converted into the byte form by described data recording;
Idle index number retrieval module for from described idle index, obtaining first idle index number, and is deleted described first idle index number from described idle index;
The memory location locating module, for navigating to the memory location of described first idle index number in described data file.
10. device according to claim 7, it is characterized in that, described storage data recordin module also comprises the null byte packing module, while being less than the length of storage unit of described data file for the length when the described data recording of actual storage, use the partial bytes of described null byte filling array to fill described storage unit.
11. device according to claim 7, is characterized in that, the described index record module that generates and stores also comprises renewal the last item index record module, for upgrading the last item index record.
12. device according to claim 7, it is characterized in that, the content of described index record comprises the index number of next data record of the index number of upper data record of the state of described data recording, described data recording and described data recording.
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| CN110059065A (en) * | 2019-04-25 | 2019-07-26 | 北京酷我科技有限公司 | A kind of method of disk index data |
| CN112422491A (en) * | 2020-05-08 | 2021-02-26 | 上海幻电信息科技有限公司 | Encryption and decryption method for digital codes, server and storage medium |
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