CN104050268A - Continuous data protection and recovery method with log space adjustable online - Google Patents
Continuous data protection and recovery method with log space adjustable online Download PDFInfo
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- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1415—Saving, restoring, recovering or retrying at system level
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- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
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Abstract
The invention relates to a continuous data protection and recovery method with log space adjustable online. The continuous data protection and recovery method with log space adjustable online comprises a log data management mode, a space expansion process, a space shrinking process and a space recovery process. While the completeness of saved logs is not affected, CDP log volumes are extended or compressed, data exceeding the time limit of protection are automatically recovered, and space occupied by the data is released. Through the continuous data protection and recovery method with log space adjustable online, changing data in the protected volumes can be backed up continuously, and the content of the protected volumes can be restored to a prior time point through the backup data.
Description
Technical field
The invention belongs to computer data storage and backup method, be specifically related to the online adjustable continuous data protection of a kind of log space and restoration methods.
Background technology
Continuous data protection (Continuous Data Protection, CDP) is a kind of emerging Data Protection Technologies.Its continuously capture-data change, these variations are independent of to raw data and preserve, and protected data can be returned to over to random time point.Because CDP system continues to catch data variation, record data amount is very large, need to effectively manage Backup Data, and traditional data management mode is to write in chronological order, and the advantage of this mode is that management is simple, and read-write is convenient.But cannot accomplish the dynamic change of daily record volume, must stop CDP system once daily record volume is filled with, affect the normal use of CDP system.
Summary of the invention
The technical matters solving
For fear of the deficiencies in the prior art part; the present invention proposes the online adjustable continuous data protection of a kind of log space and restoration methods; solving the volume of data logging in existing continuous data protection technology cannot dynamic expansion and the problem of compression; and can set automatic removing stale data by user, reclaim space for reusing.
Technical scheme
A kind of online adjustable continuous data protection of log space and restoration methods, is characterized in that step is as follows:
Step 1: CDP daily record volume is divided into superblock, index segment and several data segments; The every application of system is used a new data section, just generates a corresponding index in index segment, records the Article 1 data write time in corresponding data segment number and section in index;
Described superblock is first data block of data logging volume, record CDP operation and the required full detail of data management, comprise that CDP starts writing time, CDP state, effectively index segment start address, data segment start sector number, data segment total quantity, the metadata quantity, the data segment number of current use, the data segment free time segment table that record in the data segment number, present segment that use;
Described idle segment table is a bit table, records each data segment service condition;
Described data segment is the space of isometric store backup data and metadata, stores a certain amount of Backup Data and its corresponding metadata in each data segment, and metadata and Backup Data are left concentratedly meta-data region and the Backup Data district at data segment separately;
Step 2: all Backup Datas are split as to the data block of fixed size, the corresponding metadata of each data block, metadata and corresponding data block are stored in same data segment
Step 3: the metadata that defines each data block; Described metadata comprises timestamp, data block address and address, the data block size of data block in daily record volume in protected volume;
Step 4:
Data recording process; When CDP system acquisition arrives the data writing of protected volume, from superblock, check the data segment number of current use and the data volume of present segment storage; If the data segment number of current use effectively and the data volume of storing in present segment do not exceed maximal value, in the data segment using, write metadata and Backup Data piece; Otherwise need to distribute a new data section to preserve daily record, process is: the idle data section of inquiring about segment number minimum in the idle segment table from superblock, and be labeled as and use in idle segment table, be the newly-built index of this data segment afterwards, in index, fill in this section of segment number and current time.Again according to formula: data segment plot+segment number × segment length, calculate this data segment address, write wherein metadata and Backup Data;
Retrieve the process of the Backup Data in a certain moment; From superblock, read effective index start-stop position, start the search index time in order from effective index starting point, when retrieving at fixed time little and next index time certain index time greatly at fixed time time, calculate the metadata timestamp of storing in data segment position that this index is corresponding retrieve data section, can find nearest data before and after object time point;
The calculating of daily record volume free space; The part that can store valid data in daily record volume is the Backup Data district in each data segment, while calculating daily record volume remaining space, from superblock, read current available data segment number, be multiplied by the size in Backup Data district in each data segment by data available section number, obtain remaining free space;
Space dilation process; Call memory virtualization system daily record is involved in to row dilatation, CDP system reads daily record volume size again, and calculates daily record volume and can hold data segment quantity; Data segment quantity after dilatation is write to superblock, the data available of amendment residue simultaneously section number; Because there is change in the data segment quantity of super fast middle record, cause the scope of inquiring about idle segment table to increase, newly-increased space will be queried to and use;
Space reduction process; System-computed goes out the data segment number N having used, and travels through afterwards index, if data segment corresponding to index is more than or equal to N, the content of this data segment is copied to and between 0 to N-1, numbers minimum idle data section, and revise index; After index has traveled through, the continuous space after data segment N is all idle data section, is recovered; System accounting calculates the big or small M in this part space, can call afterwards Storage Virtualization module CDP daily record volume is compressed to the size between 0 to M;
Space reclamation process; In the data protection time limit of setting according to user, cleaning exceedes the data segment of protection period, discharges space for reusing; If receive data recovery request in space reclamation process, stop at once space reclamation and start to recover data; In the time that space reclamation starts; system starts to detect from effective index the earliest; inquire about the time range recording in this index corresponding data section; if all records all exceed the protection period in data segment; the data that record in data segment are write to initial mirror image; effectively after the initial pointer of index, move afterwards, this index was lost efficacy.In idle segment table, use status indication for not using data segment corresponding this index, and the data available section number recording in superblock is added to one.Continue next index of inquiry, until find the index not exceeding the time limit, the initial time that the amendment CDP record start time is this index, finishes;
Data recovery procedure; Data start to travel through index from effective index starting point while recovery; if the index time traversing is not within release time; jump to next index; otherwise start to travel through the metadata in index corresponding data section; if metadata timestamp meets recovery condition;, according to the information recording in metadata, Backup Data block copy is returned to the correspondence position in protected volume, until the metadata timestamp reading stops while being greater than Recovery Time Objective.
In described step 2, the data block of fixed size is 2K, 4K or 8K.
Beneficial effect
The online adjustable continuous data protection of a kind of log space and restoration methods that the present invention proposes, comprise daily record data way to manage, space dilatation, space reduction, space reclamation process.The present invention is not affecting preserve daily record integrality in the situation that, and to CDP, daily record involves in row expansion or compression, and the automatic recovery exceedes the data of protection period, and discharges the space that it takies.The present invention can continue to back up the delta data in protected volume, and can utilize Backup Data that the content recovery of protected volume is arrived to older time point.
The beneficial effect that art scheme of the present invention is brought:
(1) daily record data centralized stores.Be different from traditional C DP metadata and Backup Data are stored in respectively to different volumes, the present invention, being stored in Backup Data and metadata set in same daily record volume, is easy to Organization of Data and management.
(2) fast finding target data.Index of reference is managed data section, in the time of inquiry log data, do not need to travel through whole metadata chain, can judge that by index daily record in corresponding data section is whether in query context, the data segment in query context not is not traveled through.Reduce ergodic data amount, accelerate inquiry velocity.
(3) space management has more dirigibility.In CDP operational process, can dynamically carry out space dilatation and space reclamation, not affect the daily record of system normal recordings, also can not destroy the daily record data of having stored.
Brief description of the drawings
Fig. 1: Method of Data Organization
Fig. 2: space dilatation
Fig. 3: space reduction
Fig. 4: space reclamation
Embodiment
Now in conjunction with the embodiments, the invention will be further described for accompanying drawing:
The present invention is a kind of online adjustable continuous data method of log space, comprising:
(1) CDP blog management method; CDP daily record volume is divided into superblock, index segment and several data segments.Superblock is first data block of data logging volume.Record CDP operation and the required full detail of data management, comprise that CDP starts writing time, CDP state, effectively index segment start address, data segment start sector number, data segment total quantity, the metadata quantity, the data segment number of current use, the data segment free time segment table that record in the data segment number, present segment that use.Idle segment table is a bit table, records each data segment service condition.The every application of system is used a new data section, just generates a corresponding index in index segment.In index, record the Article 1 data write time in corresponding data segment number and section.Data segment is the space of isometric store backup data and metadata, stores a certain amount of Backup Data and its corresponding metadata in each data segment, and metadata and Backup Data are left concentratedly meta-data region and the Backup Data district at data segment separately.
(2) all Backup Datas are all split as the data block of fixed size, as 2K, 4K, 8K, and the corresponding metadata of each data block, metadata and corresponding data block are stored in same data segment.
(3) define the metadata of each data block, metadata comprises timestamp, data block address and address, the data block size of data block in daily record volume in protected volume.
(4) data recording process; When CDP system acquisition arrives the data writing of protected volume, from superblock, check the data segment number of current use and the data volume of present segment storage.If the data segment number of current use effectively and the data volume of storing in present segment do not exceed maximal value, in the data segment using, write metadata and Backup Data piece.Otherwise need to distribute a new data section to preserve daily record, method is the idle data section of inquiring about segment number minimum in the idle segment table from superblock, and be labeled as and use in idle segment table, be the newly-built index of this data segment afterwards, in index, fill in this section of segment number and current time.Calculate this data segment address according to formula (data segment plot+segment number × segment length) again, write wherein metadata and Backup Data.
(5) retrieve the process of the Backup Data in a certain moment; From superblock, read effective index start-stop position, start the search index time in order from effective index starting point, when retrieving at fixed time little and next index time certain index time greatly at fixed time time, calculate the metadata timestamp of storing in data segment position that this index is corresponding retrieve data section, can find nearest data before and after object time point.
(6) calculating of daily record volume free space; The part that can store valid data in daily record volume is the Backup Data district in each data segment, while calculating daily record volume remaining space, from superblock, read current available data segment number, be multiplied by the size in Backup Data district in each data segment by data available section number, just can obtain remaining free space.
(7) space dilation process; First call memory virtualization system daily record is involved in to row dilatation, CDP system reads daily record volume size again, and calculates daily record volume and can hold data segment quantity.Data segment quantity after dilatation is write to superblock, the data available of amendment residue simultaneously section number.Because there is change in the data segment quantity of super fast middle record, cause the scope of inquiring about idle segment table to increase, newly-increased space will be queried to and use.
(8) space reduction process; Space reduction is to dwindle data logging to roll up shared space and ensure that the data of backup do not lose simultaneously.First system calculates the data segment number N having used, and travels through afterwards index, if data segment corresponding to index is more than or equal to N, the content of this data segment is copied to and between 0 to N-1, numbers minimum idle data section, and revise index.After index has traveled through, the continuous space after data segment N is all idle data section, can be recovered.System accounting calculates the big or small M in this part space, can call afterwards Storage Virtualization module CDP daily record volume is compressed to the size between 0 to M.
(9) space reclamation process; Space reclamation is to be set by the user the data protection time limit, and system Automatic clearance exceedes the data segment of protection period, discharges space for reusing.Space reclamation can timing or user manually move, also can in the time of insufficient space, automatically move, if receive data recovery request in space reclamation process, stop at once space reclamation and start to recover data.In the time that space reclamation starts; system starts to detect from effective index the earliest; inquire about the time range recording in this index corresponding data section; if all records all exceed the protection period in data segment; the data that record in data segment are write to initial mirror image; effectively after the initial pointer of index, move afterwards, this index was lost efficacy.In idle segment table, use status indication for not using data segment corresponding this index, and the data available section number recording in superblock is added to one.Continue next index of inquiry, until find the index not exceeding the time limit, the initial time that the amendment CDP record start time is this index, finishes.
(10) data recovery procedure; Data start to travel through index from effective index starting point while recovery.If the index time traversing, not within release time, is jumped to next index.Otherwise start to travel through the metadata in index corresponding data section, if metadata timestamp meets recovery condition, according to the information recording in metadata, Backup Data block copy is returned to the correspondence position in protected volume.Until the metadata timestamp reading stops while being greater than Recovery Time Objective.
Specific embodiment is as follows:
Data management mode is as Fig. 1.CDP daily record volume is divided into superblock, index segment, data segment.In each data segment, recording metadata and corresponding data block.Can find the position of Backup Data piece in daily record volume and the position in protected volume by metadata.
Describe custom-designed three data structures of the present invention below in detail: superblock data structure (table 1), index data structure (table 2) and metadata structure (table 3).
Table 1 superblock structure
Wherein start_time record is that CDP starts the record data time, and in the time recovering, system can return to data start_time to any moment between current time.Head_index and tail_index have indicated head pointer and the tail pointer of index, are safeguarding effectively index queue.Along with increasing of record amount, system is constantly applied for new data segment, can be that the data segment of new application is set up chronological index in tail_index position.In the time that needs discharge early stage data, head_index index point to be passed backward, the team that indexes out the earliest becomes invalid index.
Table 2 index data structure
| Member | Implication |
| long?seg_num | The segment number that current index is corresponding |
| time_t?idx_time | The timestamp of Article 1 metadata in the data segment of index |
Index structure is two tuples of time and address composition.Traversal search index time first when index, find after the index needing, use segment number to be multiplied by segment length and obtain data segment offset address, from superblock, sense data segment base adds offset address, thereby obtains data segment deposit position.
Table 3 metadata structure
Metadata record corresponding data at the memory location of protected partition src_addr with at the memory location cdp_addr of daily record volume, and size of data data_size.In the time recovering, determine by inquiry mt_time whether corresponding data piece needs to recover.If mt_time, within the scope of recovery, has just completed the rejuvenation of a data block to the src_addr position of protected partition from the data of daily record volume cdp_addr position copy data_size size.
Space dilatation way is as Fig. 2, and the data segment that white indicates represents to have had data segment before dilatation, and initial data available section number is 3.Darker regions is newly-increased data segment.After the dilatation of space, system, through calculating, changes the data available section number in superblock as 5 into.System expands as 0 to 5 in hunting zone from 0 to 3 in the time of the idle segment table of search, and newly-increased data segment can be searched and use.
Space reduction mode is as Fig. 3, data segment 2,3,4 has been used, it is 3 that system is found usage data section number, afterwards data are all compressed to 0 to 3 data segment, the content of data segment 3 is copied to 0, the content of data segment 4 is copied to 1, data segment 3,4 is labeled as to the free time, and revises manipulative indexing.Like this, data segment 3,4 just becomes idle data section, and shared space can be released, and calls afterwards memory virtualization system releasing idling section and completes space reduction.
Space reclamation mode is as Fig. 4.If dark part in index segment in figure be the effective index of Article 1, corresponding data segment number is that in 0,0 data segment, data are exceeded the time limit, and 0 data segment state in idle segment table is not changed into use, and this Index Status is labeled as invalid.Continue next index of traversal, until find Article 1 not exceed the index of the term of validity.
Claims (2)
1. the online adjustable continuous data protection of log space and a restoration methods, is characterized in that step is as follows:
Step 1: CDP daily record volume is divided into superblock, index segment and several data segments; The every application of system is used a new data section, just generates a corresponding index in index segment, records the Article 1 data write time in corresponding data segment number and section in index;
Described superblock is first data block of data logging volume, record CDP operation and the required full detail of data management, comprise that CDP starts writing time, CDP state, effectively index segment start address, data segment start sector number, data segment total quantity, the metadata quantity, the data segment number of current use, the data segment free time segment table that record in the data segment number, present segment that use;
Described idle segment table is a bit table, records each data segment service condition;
Described data segment is the space of isometric store backup data and metadata, stores a certain amount of Backup Data and its corresponding metadata in each data segment, and metadata and Backup Data are left concentratedly meta-data region and the Backup Data district at data segment separately;
Step 2: all Backup Datas are split as to the data block of fixed size, the corresponding metadata of each data block, metadata and corresponding data block are stored in same data segment
Step 3: the metadata that defines each data block; Described metadata comprises timestamp, data block address and address, the data block size of data block in daily record volume in protected volume;
Step 4:
Data recording process; When CDP system acquisition arrives the data writing of protected volume, from superblock, check the data segment number of current use and the data volume of present segment storage; If the data segment number of current use effectively and the data volume of storing in present segment do not exceed maximal value, in the data segment using, write metadata and Backup Data piece; Otherwise need to distribute a new data section to preserve daily record, process is: the idle data section of inquiring about segment number minimum in the idle segment table from superblock, and be labeled as and use in idle segment table, be the newly-built index of this data segment afterwards, in index, fill in this section of segment number and current time.Again according to formula: data segment plot+segment number × segment length, calculate this data segment address, write wherein metadata and Backup Data;
Retrieve the process of the Backup Data in a certain moment; From superblock, read effective index start-stop position, start the search index time in order from effective index starting point, when retrieving at fixed time little and next index time certain index time greatly at fixed time time, calculate the metadata timestamp of storing in data segment position that this index is corresponding retrieve data section, can find nearest data before and after object time point;
The calculating of daily record volume free space; The part that can store valid data in daily record volume is the Backup Data district in each data segment, while calculating daily record volume remaining space, from superblock, read current available data segment number, be multiplied by the size in Backup Data district in each data segment by data available section number, obtain remaining free space;
Space dilation process; Call memory virtualization system daily record is involved in to row dilatation, CDP system reads daily record volume size again, and calculates daily record volume and can hold data segment quantity; Data segment quantity after dilatation is write to superblock, the data available of amendment residue simultaneously section number; Because there is change in the data segment quantity of super fast middle record, cause the scope of inquiring about idle segment table to increase, newly-increased space will be queried to and use;
Space reduction process; System-computed goes out the data segment number N having used, and travels through afterwards index, if data segment corresponding to index is more than or equal to N, the content of this data segment is copied to and between 0 to N-1, numbers minimum idle data section, and revise index; After index has traveled through, the continuous space after data segment N is all idle data section, is recovered; System accounting calculates the big or small M in this part space, can call afterwards Storage Virtualization module CDP daily record volume is compressed to the size between 0 to M;
Space reclamation process; In the data protection time limit of setting according to user, cleaning exceedes the data segment of protection period, discharges space for reusing; If receive data recovery request in space reclamation process, stop at once space reclamation and start to recover data; In the time that space reclamation starts; system starts to detect from effective index the earliest; inquire about the time range recording in this index corresponding data section; if all records all exceed the protection period in data segment; the data that record in data segment are write to initial mirror image; effectively after the initial pointer of index, move afterwards, this index was lost efficacy.In idle segment table, use status indication for not using data segment corresponding this index, and the data available section number recording in superblock is added to one.Continue next index of inquiry, until find the index not exceeding the time limit, the initial time that the amendment CDP record start time is this index, finishes;
Data recovery procedure; Data start to travel through index from effective index starting point while recovery; if the index time traversing is not within release time; jump to next index; otherwise start to travel through the metadata in index corresponding data section; if metadata timestamp meets recovery condition;, according to the information recording in metadata, Backup Data block copy is returned to the correspondence position in protected volume, until the metadata timestamp reading stops while being greater than Recovery Time Objective.
2. the online adjustable continuous data protection of log space and restoration methods according to claim 1, is characterized in that: in described step 2, the data block of fixed size is 2K, 4K or 8K.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391954A (en) * | 2014-11-27 | 2015-03-04 | 北京国双科技有限公司 | Database log processing method and device |
| CN105045850A (en) * | 2015-07-06 | 2015-11-11 | 西北工业大学 | Method for recovering junk data in cloud storage log file system |
| CN107480226A (en) * | 2017-08-03 | 2017-12-15 | 长沙曙通信息科技有限公司 | A kind of real-time data protection system writes log implementation method |
| CN107919970A (en) * | 2016-10-08 | 2018-04-17 | 南京联成科技发展股份有限公司 | A kind of log management realization method and system of safe O＆M service cloud platform |
| CN107957921A (en) * | 2017-12-08 | 2018-04-24 | 武汉瑞纳捷电子技术有限公司 | A kind of intelligent card power failure data guard method of balance abrasion |
| CN109445714A (en) * | 2018-11-09 | 2019-03-08 | 浪潮电子信息产业股份有限公司 | A kind of recycle bin method for cleaning and device |
| CN109522300A (en) * | 2018-10-24 | 2019-03-26 | 南京邮电大学 | Valid data screening plant |
| CN109828862A (en) * | 2017-11-23 | 2019-05-31 | 成都华为技术有限公司 | A kind of method and apparatus playing back log |
| CN111143236A (en) * | 2019-12-07 | 2020-05-12 | 杭州安恒信息技术股份有限公司 | Memory mapping implementation queue and data reading and writing method thereof |
| CN111831186A (en) * | 2020-06-28 | 2020-10-27 | 维沃移动通信有限公司 | Information processing method and device and electronic equipment |
| CN113220692A (en) * | 2021-06-01 | 2021-08-06 | 烟台东方威思顿电气有限公司 | Load curve data access method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070294274A1 (en) * | 2006-06-19 | 2007-12-20 | Hitachi, Ltd. | System and method for managing a consistency among volumes in a continuous data protection environment |
| CN101187948A (en) * | 2007-12-20 | 2008-05-28 | 中国科学院计算技术研究所 | A continuous data protection system and its realization method |
| EP1959346A2 (en) * | 2007-02-15 | 2008-08-20 | Hitachi, Ltd. | Methods and apparatus for adjusting a journal area for continuous data protection |
| CN102012851A (en) * | 2010-12-20 | 2011-04-13 | 浪潮(北京)电子信息产业有限公司 | Continuous data protection method and server |
-
2014
- 2014-06-23 CN CN201410283768.4A patent/CN104050268A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070294274A1 (en) * | 2006-06-19 | 2007-12-20 | Hitachi, Ltd. | System and method for managing a consistency among volumes in a continuous data protection environment |
| EP1959346A2 (en) * | 2007-02-15 | 2008-08-20 | Hitachi, Ltd. | Methods and apparatus for adjusting a journal area for continuous data protection |
| CN101187948A (en) * | 2007-12-20 | 2008-05-28 | 中国科学院计算技术研究所 | A continuous data protection system and its realization method |
| CN102012851A (en) * | 2010-12-20 | 2011-04-13 | 浪潮(北京)电子信息产业有限公司 | Continuous data protection method and server |
Non-Patent Citations (1)
| Title |
|---|
| 刘正伟: "海量数据持续数据保护技术研究与实现", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391954B (en) * | 2014-11-27 | 2019-04-09 | 北京国双科技有限公司 | The processing method and processing device of database journal |
| CN104391954A (en) * | 2014-11-27 | 2015-03-04 | 北京国双科技有限公司 | Database log processing method and device |
| CN105045850A (en) * | 2015-07-06 | 2015-11-11 | 西北工业大学 | Method for recovering junk data in cloud storage log file system |
| CN105045850B (en) * | 2015-07-06 | 2018-08-14 | 西北工业大学 | Junk data recovery method in cloud storage log file system |
| CN107919970A (en) * | 2016-10-08 | 2018-04-17 | 南京联成科技发展股份有限公司 | A kind of log management realization method and system of safe O＆M service cloud platform |
| CN107480226A (en) * | 2017-08-03 | 2017-12-15 | 长沙曙通信息科技有限公司 | A kind of real-time data protection system writes log implementation method |
| CN109828862B (en) * | 2017-11-23 | 2023-08-22 | 成都华为技术有限公司 | Method and device for replaying log |
| CN109828862A (en) * | 2017-11-23 | 2019-05-31 | 成都华为技术有限公司 | A kind of method and apparatus playing back log |
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| CN109522300B (en) * | 2018-10-24 | 2021-09-28 | 南京邮电大学 | Effective data screening device |
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