CN106951488B - Log recording method and device - Google Patents
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Abstract
The invention provides a log recording method and device. Relates to the log management field; the problem of low system processing capacity is solved. The method comprises the following steps: distributing a buffer queue group for a log file write-in task, wherein the buffer queue group comprises at least two buffer queues; selecting at least one buffer queue in the buffer queue group as a current buffer queue; and writing the log data in the current cache queue into a log file in a disk, and simultaneously acquiring the log data to be written in the cache queues except the current cache queue in the cache queue group. The technical scheme provided by the invention is suitable for a high-concurrency log reading and writing environment, and realizes efficient and parallel log data cache writing.
Description
Technical Field
The present invention relates to the field of log management, and in particular, to a log recording method and apparatus.
Background
In daily development, the recording of logs is indispensable. The log writing to the same file can only be performed by a single thread, and a simple lock is usually used to ensure that only one thread performs write operation on the same log file at the current moment, so that the correctness of log output is ensured. However, the disadvantage of this approach is also apparent, in that the system is very inefficient at high concurrency. It is easy to cause system performance bottleneck and reduce system processing capacity.
Even if a multithreading processing mode is used to avoid the reduction of the system processing capacity, when the multithreading log record is written, the log record needs to be interacted with a disk I/O (input/output), so that the time for a single thread to occupy the lock is prolonged, a large number of threads are blocked and wait, and the system processing capacity is reduced.
Disclosure of Invention
The present invention is directed to solving the problems described above.
According to a first aspect of the present invention, a logging method comprises:
distributing a buffer queue group for a log file write-in task, wherein the buffer queue group comprises at least two buffer queues;
selecting at least one buffer queue in the buffer queue group as a current buffer queue;
and writing the log data in the current cache queue into a log file in a disk, and simultaneously acquiring the log data to be written in the cache queues except the current cache queue in the cache queue group.
Preferably, writing the log data in the current cache queue into a log file in a disk, and acquiring the log data to be written by the cache queues except for the current cache queue in the cache queue group includes:
creating an I/O thread, writing the log data in the current cache queue into a log file, adding a synchronous lock to the log file during the writing period, and removing the synchronous lock after the writing is finished;
and creating a logic thread, and acquiring the log data to be written in the cache queues except the current cache queue in the cache queue group.
Preferably, the method further comprises:
and after all log data in the current cache queue are written, reselecting the current cache queue from the cache queue group.
Preferably, the method further comprises:
and after the log data in the current cache queue are completely written in, the logic thread reselects the current cache queue to be completed, and adds a synchronous lock to the acquisition of the log data to be written in.
Preferably, the method further comprises:
and for a plurality of log file writing tasks, respectively allocating a corresponding cache queue group for each log file writing task.
According to another aspect of the present invention, a logging apparatus includes:
the queue generating module is used for distributing a buffer queue group for the log file write-in task, wherein the buffer queue group comprises at least two buffer queues;
the control module is used for selecting at least one cache queue in the cache queue group as a current cache queue;
and the read-write management module is used for writing the log data in the current cache queue into a log file in a disk, and simultaneously, the cache queues except the current cache queue in the cache queue group acquire the log data to be written.
Preferably, the read-write management module includes:
the first thread management unit is used for creating an I/O thread, writing the log data in the current cache queue into a log file, adding a synchronous lock to the log file during the writing period, and removing the synchronous lock after the writing is finished;
and the second thread management unit is used for creating a logic thread and acquiring the log data to be written in the cache queues except the current cache queue in the cache queue group.
Preferably, the control module is further configured to reselect the current cache queue from the cache queue group after all log data in the current cache queue are written into the current cache queue.
Preferably, the queue generating module is further configured to, for a plurality of log file writing tasks, respectively allocate a corresponding cache queue group to each log file writing task.
The invention provides a log recording method and a log recording device, wherein a buffer queue group is distributed for a log file writing task, the buffer queue group comprises at least two buffer queues, at least one buffer queue in the buffer queue group is selected as a current buffer queue, log data in the current buffer queue is written into a log file in a disk, meanwhile, the buffer queues except the current buffer queue in the buffer queue group acquire the log data to be written, division is carried out in a double-buffer queue or multi-buffer queue mode, and buffer data and written data are synchronously carried out, so that efficient parallel buffer writing of the log data is realized, and the problem of low system processing capacity is solved.
Other characteristic features and advantages of the invention will become apparent from the following description of exemplary embodiments, which is to be read in connection with the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.
Fig. 1 schematically shows a flow of a logging method provided in an embodiment of the present invention;
fig. 2 exemplarily shows a structure of a logging apparatus provided in a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The problem of low system processing efficiency exists in both single-thread and multi-thread log file writing modes. In order to solve the problem, embodiments of the present invention provide a logging method and apparatus. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
First, a first embodiment of the present invention will be described with reference to the drawings.
The embodiment of the invention provides a log recording method, which can effectively improve the log file writing efficiency on the premise of ensuring the reliability. The process of completing the log record by using the method is shown in fig. 1, and comprises the following steps:
in this step, a buffer queue group is allocated for the log file write task, and a plurality of buffer queues are configured in the buffer queue group. In a general application environment, a configuration mode that one buffer queue group comprises two buffer queues is adopted.
And for a plurality of log file writing tasks, respectively allocating a corresponding cache queue group for each log file writing task.
In the following, a description will be given taking an example in which each set includes two cache queues. In this step, a plurality of sets of buffer queue sets (a buffer queue set is a double buffer) are created, and a set of buffer queue is allocated to each user.
102, selecting at least one buffer queue in the buffer queue group as a current buffer queue;
in this step, one buffer queue is selected from the buffer queue group as a current buffer queue, the current buffer queue is a buffer queue responsible for writing the log data into the disk, and the other buffer queues except the current buffer queue are responsible for receiving the log data to be written into the disk. At least one cache queue can be selected from the cache queues storing the log data in the cache queue group as a current cache queue according to a preset screening rule. The screening rule can be determined according to an application scenario, for example, after selecting a cache queue with more cached log data as a current cache queue or presenting available cache queues in a list form, receiving a user instruction, and determining the current cache queue according to the user instruction.
Specifically, the cache queue may be implemented in the form of a log cache list. For example, a cache queue group is created, containing a log cache list Buffer a and a log cache list Buffer B, and specifying the log cache list currently in use.
103, writing the log data in the current cache queue into a log file in a disk, and simultaneously acquiring the log data to be written by cache queues except the current cache queue in the cache queue group;
in this step, a part of the cache queues in the cache queue group writes log data into a log file in a disk, the other part of the cache queues obtains the log data to be written, and the writing of the data into the disk and the continuous obtaining of the log data to be written are performed in parallel through different threads, so that the log file writing efficiency is greatly improved.
In this step, preferably, threads are respectively configured for the two cache queues:
creating an I/O thread, writing the log data in the current cache queue into a log file, and adding a synchronous lock to the log file during the writing period;
and creating a logic thread, and acquiring the log data to be written in the cache queues except the current cache queue in the cache queue group.
The example is still illustrated with two buffer queues in a buffer queue group, one of the two buffer queues is responsible for reading for logical threads and the other is responsible for writing for I/O threads.
The log data is added as one StringBuffer to ArrayList < StringBuffer > A currently in use, and the other is free.
And locking and synchronizing the current log file, judging and obtaining a log cache list needing output caching at present according to conditions, and writing the cache of the log file.
The I/O thread needs to add a synchronization lock each time it writes to the cache queue, but the logical thread does not need to add a lock on the read queue.
When a plurality of threads are used for log recording, log data needing to be written are firstly stored in a cache queue in charge of writing, and then the threads for logic reading are set to be in a non-blocking mode. At which time the queue for logical reads begins to work. After the thread which reads logically reads the data of the own buffer queue, the buffer queue which reads logically and the buffer queue which is responsible for writing are exchanged.
104, after all log data in the current cache queue are written, reselecting the current cache queue from the cache queue group;
in this step, after the log data in the current cache queue is written into the disk, the current cache queue is reselected from the cache queue group, other cache queues in which the log data are cached are selected as new current cache queues, and the log data in the new current cache queues are continuously written into the disk; and the last current cache queue continues to acquire the log data to be written. By such alternation, uninterrupted data writing is achieved.
Still take the example of two buffer queues in one buffer queue group, after the logical thread finishes reading the queue, the buffer queue of the logical thread and the buffer queue of the I/O thread will be exchanged. The logic thread also needs to add a synchronization lock when exchanging the queue, and the synchronization lock is added to the acquisition of the log data to be written before the current cache queue is reselected after all the log data in the current cache queue are written.
When the log data in the memory is output to the disk file, the currently used ArrayList < Buffer > A and the idle ArrayList < Buffer > B are exchanged in roles. The specific process is as follows:
if it is ArrayList < Buffer > A that is currently writing the log data into the cache that is obtained, ArrayList < Buffer > A is converted to write into the disk cache. Thereby converting the ArrayList < Buffer > B that is idling into a cache list that continues to receive log data writes. ArrayList < Buffer > B which is free after the swap will receive the log data, while ArrayList < Buffer > A which has written the content before is used to output the log file to the disk storage.
The size of a cache region occupied by the log cache list can be adjusted according to the size of data volume related in the task, if the cache region is small, the data can be processed more timely, but the throughput and the probability of resource competition are increased; if the setting of the cache region is larger, the effect is opposite.
Preferably, a capacity upper limit may be set to the buffer, and after the amount of data stored in the buffer exceeds the upper limit, the data received again will be discarded without being inserted into the log cache list.
And outputting the log file in the cache list A to a disk, and supporting memory size triggering and refreshing time interval triggering to write the log file into the disk file.
The interaction of the double cache lists can avoid the problems that the receiving of new log data is influenced and a multithread lock is influenced when the log file is output to a disk every time.
The log file is output to the disk in a mode of supporting multiple output modes, and the write operation can be triggered according to a time interval or according to the size of a memory buffer.
The second embodiment of the present invention will be described below with reference to the drawings.
An embodiment of the present invention provides a log recording apparatus, which can be combined with a log recording method provided in an embodiment of the present invention to perform efficient log file writing, and a structure of the apparatus is shown in fig. 2, and includes:
a queue generating module 201, configured to allocate a buffer queue group to a log file write task, where the buffer queue group includes at least two buffer queues;
the control module 202 is configured to select at least one buffer queue in the buffer queue group as a current buffer queue;
the read-write management module 203 is configured to write the log data in the current cache queue into a log file in a disk, and simultaneously, the cache queues in the cache queue group other than the current cache queue obtain the log data to be written.
Preferably, the read-write management module 203 includes:
a first thread management unit 2031, configured to create an I/O thread, write log data in the current cache queue into a log file, and add a synchronization lock to the log file during writing;
the second thread management unit 2032 is configured to create a logical thread, and acquire the log data to be written in the cache queue other than the current cache queue in the cache queue group.
Preferably, the control module 202 is further configured to reselect the current cache queue from the cache queue group after all log data in the current cache queue are written.
Preferably, the queue generating module 201 is further configured to, for a plurality of log file writing tasks, respectively allocate a corresponding cache queue group to each log file writing task.
The embodiment of the invention provides a log recording method and a log recording device, wherein a buffer queue group is distributed for a log file writing task, the buffer queue group comprises at least two buffer queues, at least one buffer queue in the buffer queue group is selected as a current buffer queue, log data in the current buffer queue is written into a log file in a disk, meanwhile, the buffer queues except the current buffer queue in the buffer queue group obtain the log data to be written, division is carried out in a double-buffer queue or multi-buffer queue mode, and buffer data and written data are synchronously carried out, so that efficient and parallel buffer writing of the log data is realized, and the problem of low system processing capacity is solved.
The above-described aspects may be implemented individually or in various combinations, and such variations are within the scope of the present invention.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A method of logging, comprising:
distributing a buffer queue group for a log file write-in task, wherein the buffer queue group comprises at least two buffer queues;
selecting at least one buffer queue in the buffer queue group as a current buffer queue;
writing the log data in the current cache queue into a log file in a disk, and simultaneously acquiring the log data to be written in the cache queues except the current cache queue in the cache queue group;
writing the log data in the current cache queue into a log file in a disk, and simultaneously acquiring the log data to be written by the cache queues except the current cache queue in the cache queue group, wherein the log file comprises:
creating an I/O thread, writing the log data in the current cache queue into a log file, adding a synchronous lock to the log file during the writing period, and removing the synchronous lock after the writing is finished;
creating a logic thread, and acquiring log data to be written in a cache queue except the current cache queue in the cache queue group;
when a plurality of threads record log data, storing the log data to be written into a cache queue of the I/O thread, setting the logic thread as a non-blocking mode, and exchanging the cache queue of the logic thread with the cache queue of the I/O thread after the logic thread reads the log data to be written;
the method further comprises the following steps:
and after all log data in the current cache queue are written, reselecting the current cache queue from the cache queue group.
2. The logging method of claim 1, further comprising:
and after the log data in the current cache queue are completely written in, the logic thread reselects the current cache queue to be completed, and adds a synchronous lock to the acquisition of the log data to be written in.
3. The logging method of claim 1, further comprising:
and for a plurality of log file writing tasks, respectively allocating a corresponding cache queue group for each log file writing task.
4. A logging apparatus, comprising:
the queue generating module is used for distributing a buffer queue group for the log file write-in task, wherein the buffer queue group comprises at least two buffer queues;
the control module is used for selecting at least one cache queue in the cache queue group as a current cache queue;
the read-write management module is used for writing the log data in the current cache queue into a log file in a disk, and simultaneously, the cache queues except the current cache queue in the cache queue group acquire the log data to be written;
the control module is further configured to reselect the current cache queue from the cache queue group after all log data in the current cache queue are written;
the read-write management module comprises:
the first thread management unit is used for creating an I/O thread, writing the log data in the current cache queue into a log file, adding a synchronous lock to the log file during the writing period, and removing the synchronous lock after the writing is finished;
the second thread management unit is used for creating a logic thread and acquiring the log data to be written in the cache queues except the current cache queue in the cache queue group;
the log recording device is also used for storing the log data to be written into a cache queue of the I/O thread when a plurality of threads record the log data, setting the logic thread to be in a non-blocking mode, and exchanging the cache queue of the logic thread and the cache queue of the I/O thread after the logic thread reads the log data to be written.
5. The logging apparatus of claim 4,
the queue generating module is further configured to allocate, for a plurality of log file write tasks, a corresponding cache queue group to each log file write task.
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| CN109284257B (en) * | 2018-08-10 | 2021-01-05 | 锐捷网络股份有限公司 | Log writing method and device, electronic equipment and storage medium |
| CN109739738A (en) * | 2018-12-26 | 2019-05-10 | 深圳市网心科技有限公司 | HTML5-based event log management method, system and related device |
| CN112015827A (en) * | 2019-05-30 | 2020-12-01 | 中兴通讯股份有限公司 | Database processing method and device and computer readable storage medium |
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| CN112445431A (en) * | 2020-11-16 | 2021-03-05 | 深圳市元征科技股份有限公司 | Data storage method, device, equipment and medium |
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