A Download and install Toolshttp://www.percona.com/downloads/percona-toolkit/Currently the latest version is percona-toolkit_2.2.12.tar.gzAfter uploading to the server, unzip and set to environment variablesAdd path to MySQL user's environment
The master-slave architecture based on the principle of MySQL logical replication often results in inconsistent master-slave data due to some reasons, which causes the master-slave copy process to interrupt the error. Instead of checking the status
I. There are a large number of view pages in a Web system project that require users to enter a lot of data themselves. There are many types of these data. In order to prevent some customers from malicious input and malicious damage to Web projects,
Check is divided into client checksum server checksum. The client relies primarily on JavaScript code to complete, and server-side verification is done through programming in the program. The client can only prevent normal misoperation to reduce the
WHttps://en.wikipedia.org/wiki/Checksumhttps://zh.wikipedia.org/wiki/ChecksumA checksum is a small-sized datum derived from a block of digital data for the purpose of detecting errors which May has been introduced during its transmission or storage.
File Checksum MatchingIf you suspect that there may be many files with the same Nevin , instead of comparing all ranks comparisons with cmp or diff , The amount of time that is spent will increase as the number of files increases to the sub-party .
Datanode verifies the data checksum before actually storing the data.
The client writes data to datanode through pipeline. The last datanode checks the checksum.
When the client reads data from datanode, it also checks and compares the checksum
The checksum (checksum) program is used to generate a test and secret key from a file and then use this checksum key to verify the integrity of the file.The specific key used for file integrity testing is called checksums.Checksums are important for
File Checksum MatchingIf you suspect that there may be a lot of files with the same Nevin , rather than using cmp or diff to compare all ranks , cause the time it takes to grow as the number of files grows to a sub-party . This is able to use
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