CN108563719A - A kind of LZO compression methods and system for abnormal log dump - Google Patents
A kind of LZO compression methods and system for abnormal log dump Download PDFInfo
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- CN108563719A CN108563719A CN201810280355.9A CN201810280355A CN108563719A CN 108563719 A CN108563719 A CN 108563719A CN 201810280355 A CN201810280355 A CN 201810280355A CN 108563719 A CN108563719 A CN 108563719A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0766—Error or fault reporting or storing
- G06F11/0778—Dumping, i.e. gathering error/state information after a fault for later diagnosis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
- G06F11/0766—Error or fault reporting or storing
- G06F11/0787—Storage of error reports, e.g. persistent data storage, storage using memory protection
Abstract
The present invention provides a kind of LZO compression methods and system for abnormal log dump, the described method comprises the following steps：S101, kernel exception information feedback is received；S102, the LZO data compression function interfaces for calling encapsulation, exception information is compressed；S103, by compressed exception information data dump to storage medium；S104, when exception information service layer need obtain abnormal log when, call the LZO data decompression function interfaces of encapsulation, exception information data unziped it；S105, the exception information after decompression is fed back into exception information service layer.Primary LZO data compressions interface is Resealed by being directed to abnormal log dump, originally complicated interface algorithm is encapsulated into four function interfaces, due to encapsulating the complex operations of primary LZO interface algorithms itself, user need not be concerned about LZO algorithms itself, there is no learning cost, it need not be clear from the technical detail of compression algorithm, it is succinct using step, and conducive to maintenance.
Description
Technical field
The present invention relates to file compression techniques field, especially a kind of LZO compression methods for abnormal log dump and
System.
Background technology
Presently, there are a variety of compression algorithm libraries under Linux, and for different application scenarios, different algorithms has respective difference
The characteristics of.When needing to introduce a kind of decompression algorithm demand in the project, need from decompression speed, compression ratio and whether
It needs to occupy many aspects such as extra memory to carry out selecting most suitable algorithm.
Currently, newer linux kernel has transplanted a variety of decompression algorithm libraries, from the point of view of kernel service condition, 842
Interface is not decompressed, lz4 only has zram modules to use, and xz is for decompressing .xz files, and ZLIB and LZO are more more conventional.
ZLIB is an algorithms library increased income, and many softwares are all made of such compression algorithm, can be used as a kind of standard, lead to
Algorithms library.The algorithm supports lossless compression, for thread and safety, provides friendly decompression function interface,
And the function read-write interface for also providing GZIP files, uses upper simple and practicable, not extra complex operations.In addition, should
Algorithms library also contemplates the adaptation control operation of processor and memory source, calculated performance is limited or memory source is limited
In the case of, different parameters can be configured to decompression operation, reduce its occupancy to processor or memory.And ZLIB compresses
Rate is very high, reaches 13.4% compression ratio, and compression speed 21MB/s, decompression speed 118MB/s are suitable for absolutely mostly
Several application scenarios.
LZO is a kind of real-time data compression library (a real-time data compression library), such calculation
Faku County more payes attention to the compression speed of data, is more applicable for needing to be rapidly completed the scene of squeeze operation.LZO is equally followed
The GPL of GUN uses license.LZO is also a kind of lossless compression algorithm, and compression ratio is also more satisfactory, can reach 20.5%
Compression ratio, compression speed 135MB/s, decompression speed 410MB/s.But between compression ratio and compression speed, there are one
Restricting relation, using higher compression ratio, compression speed certainly will be reduced by also meaning that.In addition, decompression speed is not compressed
The influence of rate, remains unchanged.
In the application scenarios of abnormal log dump, it is desirable that, can be with most fast when system appearance exception reports an error even delay machine
Speed abnormal log dump is gone out, while considering the exterior storage mediums limited storage space that may be present such as BMC again
The case where, it is therefore desirable to the operation of dump after first compression is done to abnormal log.The read operation of abnormal log is not to speed
It is required that therefore decompression speed this factor not in the range of consideration.For the need of this application scenarios of abnormal log dump
It asks, LZO compression algorithms have compression speed more higher than other algorithms, while compression ratio is more satisfactory, meets application scenarios
Demand.
In view of LZO algorithms feature itself, if directly using existing function interface, not only need in original code logic
Middle progress extra memory application and relevant logic judgment, and it is also contemplated that thread-safe sex chromosome mosaicism, greatly reduce original
The readability for having code, is unfavorable for the long term maintenance of code, and ease for use is poor.
Invention content
The object of the present invention is to provide a kind of LZO compression methods and system for abnormal log dump, it is intended to which solution is worked as
Preceding LZO algorithms ease for use difference and the problem of reduce user's original code logic in abnormal log dump application scenarios,
Friendly easy-to-use function interface is provided for kernel exception journal dump, ease for use is high and does not reduce the original code logic of user.
To reach above-mentioned technical purpose, the present invention provides a kind of LZO compression methods for abnormal log dump, including
Following steps：
S101, kernel exception information feedback is received；
S102, the LZO data compression function interfaces for calling encapsulation, exception information is compressed；
S103, by compressed exception information data dump to storage medium；
S104, when exception information service layer need obtain abnormal log when, call the LZO data decompression functions of encapsulation to connect
Mouthful, exception information data are unziped it；
S105, the exception information after decompression is fed back into exception information service layer.
Preferably, it is described call encapsulation LZO data compression function interfaces before and call encapsulation LZO data solutions
It is both needed to call memory source application function before compression function interface, the operation content tool that the memory source application function executes
Body is：
Apply for the extra memory of 8K, and is also required to one piece of datarams of application when compressed data or decompression data and is used for
Store interim data.
Preferably, it is described call encapsulation LZO data compression function interfaces after and call encapsulation LZO data solutions
It is both needed to call memory source release function after compression function interface.
Preferably, the operation content of the LZO data compression functions execution of the encapsulation is specially：
Thread protection is subject to compression process by a mutual exclusion lock, the existing function of kernel is then called to encapsulate lzo1x_
1_compress, and incoming parameter, initiate data compression process, compressed data are stored in memory source application function application
In the datarams of acquisition, and the length of data after compression is preserved, then data length is judged, i.e., compressed data
Size whether be more than called side reserve for preserves compress after data size, if it is make abnormality processing, otherwise directly
Obtained compressed data is copied in datarams, and returns to compressed data size.
Preferably, the operation content for calling the LZO data decompression functions of encapsulation to execute is specially：
Thread protection is subject to decompression process by a mutual exclusion lock, the existing function of kernel is called to encapsulate lzo1x_1_
Compress, and incoming parameter, initiate data decompression processing, and size of data judges after the decompression returned to function,
When size of data is equal to initial data size only after decompression, decompression data can just succeed.
The present invention also provides a kind of LZO compressibilities for abnormal log dump, including：
Exception information monitoring modular, for receiving kernel exception information feedback；
Exception information compression module, the LZO data compression function interfaces for calling encapsulation, exception information is pressed
Contracting；
Exception information memory module is used for compressed exception information data dump to storage medium；
Exception information decompression module, for when exception information service layer needs to obtain abnormal log, calling encapsulation
LZO data decompression function interfaces, unzip it exception information data；
Exception information feedback module, for the exception information after decompression to be fed back to exception information service layer.
Preferably, the system also includes：
It is also needed when memory source application module, the extra memory for applying for 8K, and compressed data or decompression data
Apply one piece of datarams for storing interim data.
Preferably, the system also includes：
Memory source release module is used for releasing memory resource.
Preferably, the exception information compression module includes：
Thread protection location is compressed, thread protection is subject to compression process for passing through a mutual exclusion lock；
Data compression unit, for calling the existing function of kernel to encapsulate lzo1x_1_compress, and incoming parameter, hair
Play data compression process；
Data saving unit, for compressed data to be stored in the data of memory source application function application acquisition
In depositing, and preserve the length of data after compression；
Abnormal to judge processing unit, for judging data length, i.e., whether compressed size of data, which is more than, is adjusted
With just it is reserved for preserves compress after data size, if it is make abnormality processing, the compression number that otherwise will directly obtain
According to copying in datarams, and return to compressed data size.
Preferably, the exception information decompression module includes：
Thread protection location is decompressed, thread protection is subject to decompression process for passing through a mutual exclusion lock；
Data decompression unit, for calling the existing function of kernel to encapsulate lzo1x_1_compress, and incoming parameter,
Initiate data decompression processing；
Data determining unit, size of data judges after the decompression for being returned to function, the data only after decompression
When size is equal to initial data size, decompression data can just succeed.
The effect provided in invention content is only the effect of embodiment, rather than invents all whole effects, above-mentioned
A technical solution in technical solution has the following advantages that or advantageous effect：
Compared with prior art, the present invention is carried out primary LZO data compressions interface by being directed to abnormal log dump
It Reseals, originally complicated interface algorithm is encapsulated into four function interfaces, due to encapsulating primary LZO interface algorithms sheet
The complex operations of body, user need not be concerned about LZO algorithms itself, without learning cost, need not be clear from compression algorithm
Technical detail, it is succinct using step, and conducive to maintenance.
By encapsulation, it ensure that the original code logic of called side to greatest extent, improve the readability of code, and right
Thread-safe protection is added, ensures the reliability of data compression.
Description of the drawings
Fig. 1 is a kind of LZO compression method flow charts for abnormal log dump provided in the embodiment of the present invention；
Fig. 2 is a kind of LZO compressibility structure diagrams for abnormal log dump provided in the embodiment of the present invention.
Specific implementation mode
In order to clearly illustrate the technical characterstic of this programme, below by specific implementation mode, and its attached drawing is combined, to this
Invention is described in detail.Following disclosure provides many different embodiments or example is used for realizing the different knots of the present invention
Structure.In order to simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.In addition, the present invention can be with
Repeat reference numerals and/or letter in different examples.This repetition is that for purposes of simplicity and clarity, itself is not indicated
Relationship between various embodiments and/or setting is discussed.It should be noted that illustrated component is not necessarily to scale in the accompanying drawings
It draws.Present invention omits the descriptions to known assemblies and treatment technology and process to avoid the present invention is unnecessarily limiting.
Be provided for the embodiments of the invention below in conjunction with the accompanying drawings a kind of LZO compression methods for abnormal log dump and
System is described in detail.
As shown in Figure 1, the embodiment of the invention discloses a kind of LZO compression methods for abnormal log dump, including with
Lower step：
S101, kernel exception information feedback is received；
S102, the LZO data compression function interfaces for calling encapsulation, exception information is compressed；
S103, by compressed exception information data dump to storage medium；
S104, when exception information service layer need obtain abnormal log when, call the LZO data decompression functions of encapsulation to connect
Mouthful, exception information data are unziped it；
S105, the exception information after decompression is fed back into exception information service layer.
All complex operations of LZO are encapsulated in four by the compression module of the present invention using the LZO1X-1 of Kernel Porting as source
It is memory source application function, memory source release function, data compression function and data decompression respectively in a function interface
Contracting function.
The application of memory source：
In primary LZO interfaces, need to carry out cumbersome preparation, such as the Shen of extra memory before carrying out data compression
It please wait, user is needed to be familiar with all related algorithm functions in interface, it is more demanding to the familiarity of algorithm for user.
Therefore, the preparation before data compression is integrated into a function, LZO algorithms need volume in compressed data
One piece of outer working memory, needs the extra memory of 8K specific to the LZO1X-1 of Kernel Porting, and when coding needs to this block memory
Applied, and is also required to one piece of datarams of application when compressed data for storing interim data.By aforesaid operations, make
User need to only call a function, you can complete the preparation before compressing data.
The release of memory source：
Processing operation after data compression or decompression is encapsulated in a function, i.e., it, will be in work after the completion of operation
It deposits and discharges, and discharge the memory block for being originally used for storage interim data.
Data compression：
In the LZO1X-1 of Kernel Porting, realize that the function of compression interface is as follows：
int lzo1x_1_compress(const unsigned char*in,size_t in_len,unsigned
char*out,size_t*out_len,void*wrkmem)；
Wherein, first parameter is the buffer pointers of data to be compressed；Second parameter is the length of data to be compressed；
Third parameter be for preserve compression after data buffer pointers；The value that 4th parameter comes into is used to refer to show storage
The buffer size of data after compression, by pointer return the result is that compressed data actually used after running succeeded
Buffer size, i.e., compressed size of data；5th parameter is directed to the pointer for the 8K working memories that LZO is additionally required.
Improved function is subject to thread protection by a mutual exclusion lock to compression process first, then kernel is called to have
Function encapsulate lzo1x_1_compress, and be passed to parameter appropriate, initiate data compression process, compressed data preserve
In the datarams that memory resource bid function application obtains, and the length of data after compression is preserved, then to data length
Judged, i.e., compressed size of data whether be more than called side reserve for preserves compress after data size, if
It is to make abnormality processing, otherwise directly copies obtained compressed data in datarams to, and returns to compressed data size.
By being packaged to the related data compression function in primary LZO interfaces, user does not have learning cost, is not required to
It will be clear that the technical detail for knowing compression algorithm, it is succinct using step.In addition, thread-safe protection is added, ensure data compression
Reliability.
Data decompression：
In the LZO1X-1 of Kernel Porting, realize that the function of decompression interface is as follows：
int lzo1x_decompress_safe(const unsigned char*in,size_t in_len,
unsigned char*out,size_t*out_len)；
Wherein, first parameter is directed to the pointer of data buffer to be decompressed；Second parameter data to be decompressed
Length；Third parameter is directed to the buffer pointers of data after storage decompression；The value that 4th parameter comes into is original
The size of uncompressed data, after running succeeded by pointer return be data after practical decompression size, it is therefore, several
It needs to retain initial data size information when according to compression, will be unable to be decompressed when otherwise decompressing.
Improved function is subject to thread protection by a mutual exclusion lock to decompression process first, calls kernel existing
Function encapsulates lzo1x_1_compress, and is passed to parameter appropriate, initiates data decompression processing, and to the solution of function return
Size of data is judged after pressure, and when size of data is equal to initial data size only after decompression, decompression data just can be at
Work(.
In abnormal log dump, exception information core processing module is anti-in the exception information for receiving kernel exception scene
When feedback, the LZO data compression function interfaces of encapsulation are called first, and Fast Compression processing is carried out to exception information, it then will compression
In the BMC of data dump afterwards or other storage mediums, when the exception information service on upper layer will obtain abnormal log, read requests
Exception information core processing module can be passed to first, by its initiation to the actual read of the storage mediums such as BMC, exception information
Core processing module is unziped it data, by calling the LZO data decompression function interfaces encapsulated after finally decompressing
Data feedback to upper layer exception information service routine.
It is described call encapsulation LZO data compression function interfaces before and call encapsulation LZO data decompression letters
It is both needed to call memory source application function before number interface；And after the LZO data compression function interfaces for calling encapsulation
And the LZO data decompressions function interface of encapsulation is called to be both needed to call memory source release function later.
The embodiment of the present invention is Resealed primary LZO data compressions interface by being directed to abnormal log dump,
Originally complicated interface algorithm is encapsulated into four function interfaces, due to encapsulating the complexity of primary LZO interface algorithms itself
It operating, user need not be concerned about LZO algorithms itself, without learning cost, need not be clear from the technical detail of compression algorithm,
It is succinct using step, and conducive to maintenance.
By encapsulation, it ensure that the original code logic of called side to greatest extent, improve the readability of code, and right
Thread-safe protection is added, ensures the reliability of data compression.
As shown in Fig. 2, the embodiment of the invention also discloses a kind of LZO compressibilities for abnormal log dump, including：
Exception information monitoring modular, for receiving kernel exception information feedback；
Exception information compression module, the LZO data compression function interfaces for calling encapsulation, exception information is pressed
Contracting；
Exception information memory module is used for compressed exception information data dump to storage medium；
Exception information decompression module, for when exception information service layer needs to obtain abnormal log, calling encapsulation
LZO data decompression function interfaces, unzip it exception information data；
Exception information feedback module, for the exception information after decompression to be fed back to exception information service layer.
The exception information compression module includes：
Thread protection location is compressed, thread protection is subject to compression process for passing through a mutual exclusion lock；
Data compression unit, for calling the existing function of kernel to encapsulate lzo1x_1_compress, and incoming parameter, hair
Play data compression process；
Data saving unit, for compressed data to be stored in the data of memory source application function application acquisition
In depositing, and preserve the length of data after compression；
Abnormal to judge processing unit, for judging data length, i.e., whether compressed size of data, which is more than, is adjusted
With just it is reserved for preserves compress after data size, if it is make abnormality processing, the compression number that otherwise will directly obtain
According to copying in datarams, and return to compressed data size.
The exception information decompression module includes：
Thread protection location is decompressed, thread protection is subject to decompression process for passing through a mutual exclusion lock；
Data decompression unit, for calling the existing function of kernel to encapsulate lzo1x_1_compress, and incoming parameter,
Initiate data decompression processing；
Data determining unit, size of data judges after the decompression for being returned to function, the data only after decompression
When size is equal to initial data size, decompression data can just succeed.
The system also includes memory source application module, the extra memory for applying for 8K, and compressed data or solution
One piece of datarams of application are also required to when compressed data for storing interim data.
The system also includes memory source release modules, are used for releasing memory resource.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of LZO compression methods for abnormal log dump, which is characterized in that include the following steps：
S101, kernel exception information feedback is received；
S102, the LZO data compression function interfaces for calling encapsulation, exception information is compressed；
S103, by compressed exception information data dump to storage medium；
S104, when exception information service layer need obtain abnormal log when, call the LZO data decompression function interfaces of encapsulation,
Exception information data are unziped it；
S105, the exception information after decompression is fed back into exception information service layer.
2. a kind of LZO compression methods for abnormal log dump according to claim 1, which is characterized in that described
It calls before the LZO data compressions function interface of encapsulation and calls and be both needed to before the LZO data decompressions function interface of encapsulation
Calling memory source application function, the operation content that the memory source application function executes are specially：
Apply for the extra memory of 8K, and one piece of datarams of application are also required to for storing when compressed data or decompression data
Interim data.
3. a kind of LZO compression methods for abnormal log dump according to claim 1, which is characterized in that described
The LZO data compressions function interface of encapsulation is called to be both needed to later and after the LZO data decompressions function interface of calling encapsulation
Memory source is called to discharge function.
4. a kind of LZO compression methods for abnormal log dump according to claim 2, which is characterized in that the envelope
The operation content that the LZO data compression functions of dress execute is specially：
Thread protection is subject to compression process by a mutual exclusion lock, the existing function of kernel is then called to encapsulate lzo1x_1_
Compress, and incoming parameter, initiate data compression process, compressed data are stored in memory source application function application and obtain
In the datarams obtained, and the length of data after compression is preserved, then data length is judged, i.e., compressed data are big
It is small whether be more than called side reserve for preserves compression after data size, if it is make abnormality processing, otherwise directly by
Obtained compressed data copies in datarams, and returns to compressed data size.
5. a kind of LZO compression methods for abnormal log dump according to claim 2 or 4, which is characterized in that described
Call encapsulation LZO data decompression functions execute operation content be specially：
Thread protection is subject to decompression process by a mutual exclusion lock, the existing function of kernel is called to encapsulate lzo1x_1_
Compress, and incoming parameter, initiate data decompression processing, and size of data judges after the decompression returned to function,
When size of data is equal to initial data size only after decompression, decompression data can just succeed.
6. a kind of LZO compressibilities for abnormal log dump, which is characterized in that including：
Exception information monitoring modular, for receiving kernel exception information feedback；
Exception information compression module, the LZO data compression function interfaces for calling encapsulation, exception information is compressed；
Exception information memory module is used for compressed exception information data dump to storage medium；
Exception information decompression module, for when exception information service layer needs to obtain abnormal log, calling the LZO numbers of encapsulation
According to decompression function interface, exception information data are unziped it；
Exception information feedback module, for the exception information after decompression to be fed back to exception information service layer.
7. a kind of LZO compressibilities for abnormal log dump according to claim 6, which is characterized in that the system
System further includes：
It is also required to Shen when memory source application module, the extra memory for applying for 8K, and compressed data or decompression data
Please one piece of datarams for storing interim data.
8. a kind of LZO compressibilities for abnormal log dump according to claim 6, which is characterized in that the system
System further includes：
Memory source release module is used for releasing memory resource.
9. a kind of LZO compressibilities for abnormal log dump according to claim 7, which is characterized in that described different
Often Information Compression module includes：
Thread protection location is compressed, thread protection is subject to compression process for passing through a mutual exclusion lock；
Data compression unit initiates number for calling the existing function of kernel to encapsulate lzo1x_1_compress, and incoming parameter
According to compression processing；
Data saving unit, the datarams for compressed data to be stored in memory source application function application acquisition
In, and preserve the length of data after compression；
Abnormal to judge processing unit, for judging data length, i.e., whether compressed size of data is more than called side
It is reserved for preserves compress after data size, if it is make abnormality processing, otherwise directly copy obtained compressed data
In shellfish to datarams, and return to compressed data size.
10. a kind of LZO compressibilities for abnormal log dump according to claim 7 or 9, which is characterized in that institute
Stating exception information decompression module includes：
Thread protection location is decompressed, thread protection is subject to decompression process for passing through a mutual exclusion lock；
Data decompression unit is initiated for calling the existing function of kernel to encapsulate lzo1x_1_compress, and incoming parameter
Data decompression processing；
Data determining unit, size of data judges after the decompression for being returned to function, the size of data only after decompression
When equal to initial data size, decompression data can just succeed.
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