CN102902731B - The storage method of mail index - Google Patents
The storage method of mail index Download PDFInfo
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- CN102902731B CN102902731B CN201210333394.3A CN201210333394A CN102902731B CN 102902731 B CN102902731 B CN 102902731B CN 201210333394 A CN201210333394 A CN 201210333394A CN 102902731 B CN102902731 B CN 102902731B
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Abstract
The invention discloses the storage method of a kind of mail index.The storage method of the mail index in the present invention includes: for one independent user area of each user setup on block device；The mail index information of each user is respectively stored in the user area of each user.The storage method of the mail index in the application of the invention, can be effectively saved the expense of reading and writing of files system, improve the readwrite performance of system.
Description
Technical field
The present invention relates to electronic information technical field, a kind of storage method indexed particularly to mail.
Background technology
In existing mailing system, mail is typically all and is stored in the form of a file in disk.When
When needing to find the mail that a certain envelope has stored from disk, typically can be indexed by mail and retrieve this
Storage position in disk in mail.Wherein, described mail have recorded in indexing and often seals the unique of mail
The index information that numbering, size, position, theme and the owner etc. are relevant.
Mail index itself is also required to store.In the prior art, through frequently with mail index
Storage method mainly have two kinds:
The first stores method: be stored in data base by mail index.Now, in mail being indexed
The mail operation that is added, reads or deletes, can be by the operation of data base be completed.
Such as, when mail index in needs adds an envelope mail, can add required with this in data base
The corresponding record of mail added, this record include the unique number of this mail, size,
The information such as position, theme and the owner.Therefore, user can be indexed by the mail in this data base
Obtain the mail tabulation of all mails of this user.When user needs to read certain envelope mail, then can first from
This data base obtains mail index, then according to the unique number of mail, from described mail indexes
Obtain the storage position of this mail, then read this mail from this storage position.And when needing to delete certain
During individual mail, then only need to delete the record corresponding with this mail from the mail of data base indexes, and from
Disk is deleted this mail.
The second storage method: mail index is stored file system or bucket with the form of index file
On file.When needs add an envelope mail, then in this index file, add a record.Wherein,
Every record in index file all comprises the corresponding unique number of mail, size, position, theme etc.
Information.When user needs to obtain mail tabulation, whole index file can be read, resolve rope one by one
Every record in quotation part, can obtain required mail tabulation.When certain envelope mail deleted by needs,
Then can stamp deletion labelling, then at certain in advance on record corresponding with this mail in indexed file
This mail is deleted by time up hill and dale that determine.
But, the method for two kinds of above-mentioned storage mail indexes there is also some problems.Such as, exist
In the first storage method, due to be by whole mail index be stored in data base, when certain use
When the mail number of family or certain user is a lot, the inquiry operation of data base will be caused whole by these users
The inquiry operation of individual data base becomes slow, thus has influence on this data base service to other users
Speed.And in the second storage method, due to be by mail index be stored in file system or bucket literary composition
In part, and file system is for the needs of the integrity safeguarding itself structure, the reading to file system
Write operation will need certain overhead；Bucket file is also built upon on file system, the most also
There is same read-write expense, so by poor for the readwrite performance that causes system.
In summary, owing to there is various problem as above, mail the most in the prior art
In the storage method of index, the service of other users will be caused not by the operation of the user that mail data is many
Good impact, so the readwrite performance of system is by increasing and decline to a great extent with number of users；And, right
The operation behavior of mail index also will increase the expense of reading and writing of files system, reduces the readwrite performance of system.
Summary of the invention
According to the present invention, it is provided that the storage method of a kind of mail index, thus reading can be effectively saved
The expense of written document system, improves the readwrite performance of system, saves the expense of reading and writing of files system.
The storage method of a kind of mail index according to the present invention, comprising:
A, it is one independent user area of each user setup on block device；
B, the mail index information of each user is respectively stored in the user area of each user.
Wherein, the method may further comprise:
C, an index omniselector is set；In described index omniselector storage have user profile and and each
The information of the corresponding user area of user；
D, when need the mail to user index be written and read operation time, according to user profile from described rope
Draw the information obtaining corresponding user area in omniselector, and according to the information pair of described user area
The mail index of user is written and read operation.
Wherein, the information of described user area includes: original position, gross space and current mail quantity.
Wherein, described step D may further comprise:
When e-mail storage need the mail to user index be written and read operation time, e-mail storage to
Index omniselector sends inquiry request；
Described index omniselector returns to corresponding user area according to inquiry request to described e-mail storage
Information；
Described e-mail storage according to the information of the user area received to being provided with multiple user area
Index store send read-write requests；
Described index store is written and read operation according to described read-write requests to corresponding mail index,
Operating result is returned to described e-mail storage.
Wherein, described inquiry request includes: user profile.
Wherein, described read-write requests may include that the information that mail indexes.
Wherein, described user area includes: gauge outfit subregion, description subregion and index entry subregion；Wherein,
Described gauge outfit subregion is the head of user area, for recording the essential information of this user area；
Described description subregion, for storing the description information of each user mail folder；
Described index entry subregion, is used for storing each mail index.
Wherein, a length of 512 bytes of described gauge outfit subregion.
Wherein, described gauge outfit subregion also includes: effectively field, size field and total entry number field；
Described effective field, for representing that the data of user area are the most effective；
Described size field, for representing size or the length of user area；
Described total entry number field, for representing the sum of the mail index stored in user area.
Wherein, a length of 1 bit of described effective field.
Wherein, a length of 4 bytes of described size field.
Wherein, a length of 4 bytes of described total entry number field.
Wherein, a length of 512B～8KB of described description subregion.
Wherein, in described description subregion, storage has one or more folder record；Each folder
Record is all recorded the description information of a user mail folder.
Wherein, described folder record also includes: folder id field, folder name field,
Tag field and memo field；Wherein,
Described folder id field, is used for recording folder ID；
Described folder name field, is used for recording folder title；
Described tag field is a group mark position, for representing the attribute of folder；
Described memo field, for logging comment information.
Wherein, a length of 2 bytes of described folder id field；
A length of 80 bytes of described folder name field；
A length of 1 byte of described tag field；
A length of 45 bytes of described memo field.
Wherein, described index entry subregion is a length of: 8KB, 16KB, 32KB or 64KB.
Wherein, described index record also includes: mail ID field, affiliated folder id field,
Mail size field, to letter time field, location field and reserved field；Wherein,
Described mail ID field is used for storing No. ID of mail；
Folder id field belonging to described is for storing the folder ID of folder belonging to this mail；
Described mail size field is for representing the size of this mail；
Described to letter time field for store this mail to the letter time；
Described location field is for storing this mail position within the storage system；
Described reserved field is used for storing this mail, and other describes information.
Present invention also offers the storage device of a kind of mail index, this device includes: be provided with multiple
The index store of user area；
Described index store, uses for the mail index information of each user is respectively stored in each
In the user area at family.
Wherein, the storage device of described mail index also includes: storage has user profile and uses with each
The index omniselector of the information of corresponding user area, family；
Described index omniselector, for the user area corresponding according to the user profile output received
Information so that e-mail storage can according to the information of user area the mail of relative users indexed into
Row read-write operation.
As seen from the above technical solution, in the storage method of the mail index provided in the present invention,
Owing to being provided with an independent user area for each user on block device, for each user
It is assigned with independent memory space so that be separated from each other between user and user, the most again each is used
The mail index information at family is respectively stored in the user area of each user, so indexing for mail
The read-write operation of information, is independent of each other between each user, so that the use that mail data is many
The service of other users can't be had undesirable effect by the operation at family, thus can be greatly improved system
Readwrite performance.Additionally, in the inventive solutions, user area is returned by IN
Begin offset positions, and therefore can quickly locate the read-write operation of mail index every time
To this mail index storage position in disk, such that it is able to be effectively saved reading and writing of files system
Expense, improves the readwrite performance of system.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below by right
In embodiment or description of the prior art, the required accompanying drawing used is briefly described.It should be evident that
Accompanying drawing in below describing is only some embodiments of the present invention, for those of ordinary skill in the art
For, it is also possible to other embodiment and accompanying drawing thereof is obtained according to these accompanying drawing illustrated embodiments.
Fig. 1 is the schematic flow sheet of the storage method of mail index in the embodiment of the present invention；
Fig. 2 is the schematic flow sheet of a kind of implementation method of step 13 in the embodiment of the present invention；
Fig. 3 is the structural representation of the storage device of the mail index in the embodiment of the present invention.
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearer, the most also
For embodiment, the present invention is described in more detail.
Fig. 1 is the schematic flow sheet of the storage method of mail index in the embodiment of the present invention.Such as Fig. 1
Shown in, the storage method of described mail index includes:
Step 11, is one independent user area of each user setup on block device.
At present, input and output (I/O) equipment is broadly divided into two classes: block device and character device.Its
In, block device can store information in the data block (may be simply referred to as block) of fixed size, and each
Block the most all has corresponding address.The size of the data block in block device is generally in 512 bytes to 32768
Between byte, disk is then modal block device.
Owing to each data block of above-mentioned block device can be written and read behaviour independent of other data block
Make, therefore, in this step, on block device, one independent user will be set for each user
Region is for storing the mail index information of each user.Wherein, described user area is in advance in institute
State the region set on block device.
Step 12, is respectively stored in the user area of each user by the mail index information of each user
In.
Owing in a step 11, being that each user arranges an independent user area, therefore
The mail index information of each user can be respectively stored in the user area of each user in this step
In territory.
In the inventive solutions, it is possible to use mail index information is stored in use by various ways
In region, family.Hereinafter as a example by a kind of preferred embodiment therein, technical scheme will be entered
Row further instruction.
In the preferred embodiment, it is also possible to user area is logically divided into three points
District: gauge outfit subregion (Header), description subregion (Description) and index entry (Index item)
Subregion.
Wherein, described Header subregion is the head of user area, for recording the base of this user area
This information.The original position (Begin Offset) of described Header subregion then represents its described user
Region original position in whole block device or initial address.
It is also preferred that the left in a particular embodiment of the present invention, the length of described Header subregion can be 512
Byte (B).
It is also preferred that the left in a particular embodiment of the present invention, described Header subregion also includes such as following table
Shown three fields:
| Effectively (Valid) | Size (Size) | Total entry number (Num) |
Table 1
Wherein, described effective field is for representing that the data of this user area are the most effective.
Such as, when user is deleted, or the mail number stored as user too much needs bigger
User area when storing mail, it would be desirable to it is invalid to be labeled as original for this user user area,
After remaining again with.
It addition, in the preferred embodiment, a length of 1 bit (bit) of described effective field.
It is also preferred that the left the value implication of described effective field can preset, therefore, it can according to being somebody's turn to do
The effectively value of field i.e. would know that the data of this user area are the most effective.Such as, when described effectively
When the value of field is 0, represent that the data in the user area at this effective field place are unavailable, i.e.
Invalid.And when the value of described effective field is 1, represent the user area at this effective field place
In data can use.
Described size field, for representing size or the length of this user area.
It is also preferred that the left a length of 4 bytes (B) of described size field, should the most enough represent user
The size in region.
Described total entry number field, for representing the sum of the mail index stored in this user area.
It is also preferred that the left a length of 4 bytes (B) of described total entry number field, should the most enough represent this
The sum of the mail index stored in user area.
In a particular embodiment of the present invention, described Description subregion is used for storing each user's postal
The description information of part folder.Wherein, described Description subregion can store one or more mail
Folder record, all records the description information of a user mail folder in each folder record.
It is also preferred that the left in a particular embodiment of the present invention, the length of described Description subregion is permissible
It is: 512B～8KB.
It is also preferred that the left in a particular embodiment of the present invention, described folder record may also include as follows
4 shown fields: folder ID (Ufid) field, folder title (Folder name) word
Section, labelling (Flag) field and remarks (Des) field.
In a particular embodiment of the present invention, described folder can have polytype, its function class
It is similar to file, is used for storing different types of mail.Such as, described folder can include as follows
Several types: Inbox, send folder, spam folder and deleted folder etc..Preferably
, in a particular embodiment of the present invention, described user can also create new folder voluntarily.
Due to a length of 512B～8KB of Description subregion, therefore when Description subregion
In a length of 128B of every folder record time, then Description subregion can record 60
Bar folder record.If reducing the length of every folder record, then can also record more a plurality of postal
Part folder record.It addition, the mail number included in each folder is determined by service logic,
Storage does not limits in form.
In order to distinguish each different folder, then can be that each folder distributes one uniquely
No. ID, referred to as folder ID.
Therefore, the described Ufid field in every folder record can be used for recording folder ID.
It is also preferred that the left in a particular embodiment of the present invention, the length of described Ufid field can be 2 bytes.
Described Folder name field, then can be used for recording folder title.It is also preferred that the left in the present invention
Specific embodiment in, the length of described Folder name field can be 80 bytes.
Described Flag field is a group mark position, then for representing the attribute of folder.Such as, described
Flag field can represent that this folder is the folder of system definition, or the mail that user creates
Folder, or advertisement, website notice etc..
It is also preferred that the left in a particular embodiment of the present invention, the length of described Flag field can be 1
Byte.
Described Des field, then can be used for logging comment information.It is also preferred that the left in the concrete reality of the present invention
Executing in example, the length of described Des field can be 45 bytes.
It is also preferred that the left in a particular embodiment of the present invention, the length of each field in folder record
Can be set in advance according to practical situations or adjust.
Additionally, in the preferred embodiment, described index entry (Index item) subregion is used for
Store each mail index.Wherein, described Index item subregion can store one or more index note
Record, all records a mail index in each index record.
It is also preferred that the left in a particular embodiment of the present invention, the length of described Index item subregion can root
Pre-set according to practical situations.Such as, the length of described Index item subregion may is that 8KB,
16KB, 32KB, 64KB ... etc..
It is also preferred that the left in a particular embodiment of the present invention, described index record may also include following institute
4 fields shown: mail ID (MID) field, affiliated folder ID (UID) field, mail
Size (MSize) field, to letter time (Ctime) field, position (Location) field and guarantor
Stay (Reserved) field.
Wherein, described MID field is used for storing No. ID of mail.
Described UID field is for storing the folder ID of folder belonging to this mail.
Described MSize field is for representing the size of this mail.
Described Ctime field for store this mail to the letter time.
Described location field is for storing this mail position within the storage system.
Described Reserved field is used for storing this mail, and other describes information, such as, and the master of this mail
The information such as topic, sender.
By above-mentioned setting, the mail index information of each user can be respectively stored in each and use
In the user area at family.
Further, in the preferred embodiment, by the mail index information of each user
After being respectively stored in the user area of each user, also can farther include:
Step 13, arranges an index omniselector (Index navigator is called for short IN)；Described rope
Draw storage in omniselector and have user profile and the information of user area corresponding with each user.
In this step, an index omniselector will be set, be used for storing user profile and using with each
The information of corresponding user area, family.
Wherein, in the preferred embodiment, the information of described user area includes: start bit
Put, the information such as gross space and current mail quantity.
Step 14, when need the mail to user index be written and read operation time, according to user profile from
Described index omniselector obtains the information of corresponding user area, and according to described user area
The mail of user is indexed and is written and read operation by information.
In the inventive solutions, it is possible to use various ways realizes above-mentioned steps 14.Below
As a example by a kind of preferred embodiment therein, the step 14 of the present invention will be further detailed.
Fig. 2 is the schematic flow sheet of a kind of implementation method of step 14 in the embodiment of the present invention.Such as figure
Shown in 2, in the present embodiment, described step 14 can include step as described below:
Step 141, when e-mail storage (Mail Storage is called for short MS) needs the mail to user
When index is written and read operation, MS sends inquiry request to IN.
It is also preferred that the left before this step, it is also possible to pre-set a MS and index store (Index
Storage, is called for short IS).Wherein, described IS can be block device.Described IS is provided with multiple
User area, in each user area, storage has the mail index information of a user.
Therefore, when MS needs to be written and read the mail index being stored in IS operation (such as,
When MS receives an envelope mail), MS will send inquiry request to IN, postal described in requesting query
The information of the user area at part index place.Wherein, described inquiry request may include that user believes
Breath.
Step 142, IN returns the information of corresponding user area according to inquiry request to MS.
Specifically, in this step, described IN, can be according to institute after receiving described inquiry request
State the user profile in inquiry request and search the information of corresponding user area, and the user that will find
The information in region returns to described MS.Wherein, the information of described user area includes: original position,
The information such as gross space and current mail quantity.
Step 143, MS sends read-write requests according to the information of the user area received to IS.
Owing to the information of described user area includes the original position of user area, therefore MS is permissible
Information according to the user area received sends read-write requests to IS.It is also preferred that the left described read-write requests
In may include that the information that mail indexes.
Step 144, IS is written and read operation according to described read-write requests to corresponding mail index, will
Operating result returns to MS.
In this step, IS will be written and read operation according to read-write requests to its mail stored index,
And after middle operation terminates, also operating result can be returned to MS.
By above-mentioned step 141～144, above-mentioned step 14 can be realized, the mail rope to user
Introduce row read-write operation.
Fig. 3 is the structural representation of the storage device of the mail index in the embodiment of the present invention.Such as Fig. 3
Shown in, the storage device 30 of described mail index at least includes: be provided with the index of multiple user area
Memorizer 31.
Described index store 31, for being respectively stored in each by the mail index information of each user
In the user area of user.
It is also preferred that the left in a particular embodiment of the present invention, the storage device of described mail index also can enter
One step includes: storage has the index of the information of user profile and user area corresponding with each user to lead
Boat device 32.
Described index omniselector 32, for the user area corresponding according to the user profile output received
The information in territory so that the mail of relative users can be indexed by e-mail storage according to the information of user area
It is written and read operation.
In summary, in the storage method of the mail index provided in the present invention, owing to setting at block
It is provided with an independent user area for each user on Bei, is assigned with independence for each user
Memory space so that be separated from each other between user and user, the most again by the mail rope of each user
Fuse breath is respectively stored in the user area of each user, so for the read-write of mail index information
Operation, is independent of each other between each user, so that the operation of the many user of mail data is also
The service of other users will not be had undesirable effect, thus the readwrite performance of system can be greatly improved.
Additionally, in the inventive solutions, user area is that the begin offset returned by IN is come
Location, the read-write operation therefore every time indexed mail can quickly locate this mail index and exist
Storage position in disk, such that it is able to be effectively saved the expense of reading and writing of files system, improves system
Readwrite performance.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the protection of the present invention
Scope.All within the spirit and principles in the present invention, any amendment, the equivalent made and change
Enter, should be included within the scope of the present invention.
Claims (17)
1. the storage method of a mail index, it is characterised in that the method includes:
A, it is one independent user area of each user setup on block device；
B, the mail index information of each user is respectively stored in the user area of each user；
C, an index omniselector is set；In described index omniselector storage have user profile and and each
The information of the corresponding user area of user；
D, when need the mail to user index be written and read operation time, according to user profile from described rope
Draw the information obtaining corresponding user area in omniselector, and according to the information pair of described user area
The mail index of user is written and read operation；
Wherein, the information of described user area includes: original position, gross space and current mail quantity.
2. the storage method of mail index as claimed in claim 1, it is characterised in that described step
D may further comprise:
When e-mail storage need the mail to user index be written and read operation time, e-mail storage to
Index omniselector sends inquiry request；
Described index omniselector returns to corresponding user area according to inquiry request to described e-mail storage
Information；
Described e-mail storage according to the information of the user area received to being provided with multiple user area
Index store send read-write requests；
Described index store is written and read operation according to described read-write requests to corresponding mail index,
Operating result is returned to described e-mail storage.
3. the storage method of mail index as claimed in claim 2, it is characterised in that
Described inquiry request includes: user profile.
4. the storage method of mail index as claimed in claim 2, it is characterised in that
Described read-write requests includes: the information of mail index.
5. the storage method of mail index as claimed in claim 1, it is characterised in that described user
Region includes: gauge outfit subregion, description subregion and index entry subregion；Wherein,
Described gauge outfit subregion is the head of user area, for recording the information of described user area；
Described description subregion, for storing the description information of each user mail folder；
Described index entry subregion, is used for storing index record, has mail rope described in described index record
Draw.
6. the storage method of mail index as claimed in claim 5, it is characterised in that
A length of 512 bytes of described gauge outfit subregion.
7. the storage method of mail index as claimed in claim 5, it is characterised in that described gauge outfit
Subregion also includes: effectively field, size field and total entry number field；
Described effective field, for representing that the data of user area are the most effective；
Described size field, for representing size or the length of user area；
Described total entry number field, for representing the sum of the mail index stored in user area.
8. the storage method of mail index as claimed in claim 7, it is characterised in that
A length of 1 bit of described effective field.
9. the storage method of mail index as claimed in claim 7, it is characterised in that
A length of 4 bytes of described size field.
10. the storage method of mail index as claimed in claim 7, it is characterised in that
A length of 4 bytes of described total entry number field.
The storage method of 11. mail as claimed in claim 5 indexes, it is characterised in that
A length of 512B～8KB of described description subregion.
The storage method of 12. mail as claimed in claim 5 indexes, it is characterised in that
In described description subregion, storage has one or more folder record；In each folder record
All record the description information of a user mail folder.
The storage method of 13. mail as claimed in claim 12 indexes, it is characterised in that described postal
Part folder record also includes: folder id field, folder name field, tag field and remarks word
Section；Wherein,
Described folder id field, is used for recording folder ID；
Described folder name field, is used for recording folder title；
Described tag field is a group mark position, for representing the attribute of folder；
Described memo field, for logging comment information.
The storage method of 14. mail as claimed in claim 13 indexes, it is characterised in that
A length of 2 bytes of described folder id field；
A length of 80 bytes of described folder name field；
A length of 1 byte of described tag field；
A length of 45 bytes of described memo field.
The storage method of 15. mail as claimed in claim 5 indexes, it is characterised in that
Described index entry subregion a length of: 8KB, 16KB, 32KB or 64KB.
The storage method of 16. mail as claimed in claim 5 indexes, it is characterised in that described rope
Draw in record and also include: mail ID field, affiliated folder id field, mail size field, arrive
Letter time field, location field and reserved field；Wherein,
Described mail ID field is used for storing No. ID of mail；
Folder id field belonging to described is for storing the folder ID of folder belonging to this mail；
Described mail size field is for representing the size of this mail；
Described to letter time field for store this mail to the letter time；
Described location field is for storing this mail position within the storage system；
Described reserved field is used for storing this mail, and other describes information.
The storage device of 17. 1 kinds of mail indexes, it is characterised in that this device includes: be provided with many
Index store and the storage of individual user area have user profile and user corresponding with each user
The index omniselector of the information in region；
Described index store, uses for the mail index information of each user is respectively stored in each
In the user area at family；
Described index omniselector, for the user area corresponding according to the user profile output received
Information so that e-mail storage can according to the information of user area the mail of relative users indexed into
Row read-write operation；
Wherein, the information of described user area includes: original position, gross space and current mail quantity.
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| CN201210333394.3A CN102902731B (en) | 2012-09-10 | 2012-09-10 | The storage method of mail index |
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| CN201210333394.3A CN102902731B (en) | 2012-09-10 | 2012-09-10 | The storage method of mail index |
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| CN103425785A (en) * | 2013-08-22 | 2013-12-04 | 新浪网技术(中国)有限公司 | Data storage system and user data storage and reading method thereof |
| CN104077363B (en) * | 2014-06-10 | 2017-11-03 | 新浪网技术(中国)有限公司 | Mail server and its method for carrying out mail full-text search |
| CN106375532A (en) * | 2016-10-20 | 2017-02-01 | 惠州Tcl移动通信有限公司 | Mobile-terminal-based contact information processing method and system |
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| CN101114356A (en) * | 2007-08-27 | 2008-01-30 | 台均科技（深圳）有限公司 | Multiuser member card management system |
| CN102110059A (en) * | 2009-12-25 | 2011-06-29 | 中国长城计算机深圳股份有限公司 | Access method and system for multi-user hard disk data |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101114356A (en) * | 2007-08-27 | 2008-01-30 | 台均科技（深圳）有限公司 | Multiuser member card management system |
| CN102110059A (en) * | 2009-12-25 | 2011-06-29 | 中国长城计算机深圳股份有限公司 | Access method and system for multi-user hard disk data |
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