mydumper 官网：https://launchpad.net/mydumper

Mydumper介绍

    MySQL自身的mysqldump工具支持单线程工作，依次一个个导出多个表，没有一个并行的机，这就使得它无法迅速的备份数据。  
    Mydumper作为一个实用工具，能够良好支持多线程工作，可以并行的多线程的从表中读入数据并同时写到不同的文件里，这使得它在处理速度方面快于传统的mysqldump。其特征之一是在处理过程中需要对列表加以锁定，因此如果我们需要在工作时段执行备份工作，那么会引起DML阻塞。但一般现在的MySQL都有主从，备份也大部分在从上进行，所以锁的问题可以不用考虑。这样，mydumper能更好的完成备份任务。

Mydumper特性

1. 多线程备份
2. 因为是多线程逻辑备份，备份后会生成多个备份文件
3. 备份时对MyISAM表施加FTWRL(FLUSH TABLES WITH READ LOCK),会阻塞DML语句
4. 保证备份数据的一致性
5. 支持文件压缩
6. 支持导出binlog
7. 支持多线程恢复
8. 支持以守护进程模式工作，定时快照和连续二进制日志
9. 支持将备份文件切块

Mydumper安装

    # git clone https://github.com/maxbube/mydumper
    # cd mydumper
    # less README.md (查看帮助文档，里面说明了如何编译安装以及依赖包)
    #  yum install glib2-devel  zlib-devel pcre-devel openssl-devel cmake
    # cmake
    -- Configuring done
    -- Generating done
    -- Build files have been written to: /usr/local/mydumper
**  出现Configuring done和Generating done说明cmake成功了，如果有报错，请查看详细的屏幕输出日志
    # make -j 4
    # make install  (会把mydumper和myloader安装在/usr/local/bin/目录下)
    # mydumper 
    # mydumper --help
    mydumper: error while loading shared libraries: libmysqlclient.so.20: cannot open shared object file: No such file or directory (报错说明找不到这个共享库)
    # ldd /usr/local/bin/mydumper
    linux-vdso.so.1 =>  (0x00007ffe2aebb000)
    libmysqlclient.so.20 => not found
    libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fdf6d0a0000)
    libm.so.6 => /lib64/libm.so.6 (0x00007fdf6ce1c000)
    librt.so.1 => /lib64/librt.so.1 (0x00007fdf6cc14000)
    libdl.so.2 => /lib64/libdl.so.2 (0x00007fdf6ca0f000)
    libglib-2.0.so.0 => /lib64/libglib-2.0.so.0 (0x00007fdf6c6f8000)
    libgthread-2.0.so.0 => /lib64/libgthread-2.0.so.0 (0x00007fdf6c4f4000)
    libpcre.so.0 => /lib64/libpcre.so.0 (0x00007fdf6c2c6000)
    libz.so.1 => /lib64/libz.so.1 (0x00007fdf6c0b0000)
    libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x00007fdf6bdaa000)
    libc.so.6 => /lib64/libc.so.6 (0x00007fdf6ba15000)
    /lib64/ld-linux-x86-64.so.2 (0x00007fdf6d2c9000)
    libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fdf6b7ff000)

    # LD_DEBUG=libs /usr/local/bin/mydumper -v
  1987:     find library=libmysqlclient.so.20 [0]; searching
  1987:      search cache=/etc/ld.so.cache
  1987:      search path=/lib64/tls/x86_64:/lib64/tls:/lib64/x86_64:/lib64:/usr/lib64/tls/x86_64:/usr/lib64/tls:/usr/lib64/x86_64:/usr/lib64          (system search path)
  1987:       trying file=/lib64/tls/x86_64/libmysqlclient.so.20
  1987:       trying file=/lib64/tls/libmysqlclient.so.20
  1987:       trying file=/lib64/x86_64/libmysqlclient.so.20
  1987:       trying file=/lib64/libmysqlclient.so.20
  1987:       trying file=/usr/lib64/tls/x86_64/libmysqlclient.so.20
  1987:       trying file=/usr/lib64/tls/libmysqlclient.so.20
  1987:       trying file=/usr/lib64/x86_64/libmysqlclient.so.20
  1987:       trying file=/usr/lib64/libmysqlclient.so.20
  1987:
/usr/local/bin/mydumper: error while loading shared libraries: libmysqlclient.so.20: cannot open shared object file: No such file or directory
    # locate  libmysqlclient.so.20
    # ll /usr/local/mysql/lib/
    # cp /usr/local/mysql/lib/libmysqlclient.so.20 /usr/lib/
    # ldconfig
    # ldd /usr/local/bin/mydumper
    # mydumper --help
    Usage:
mydumper [OPTION...] multi-threaded MySQL dumping

Help Options:
      -?, --help                  Show help options

Application Options:
                -B, --database              Database to dump
                -T, --tables-list           Comma delimited table list to dump (does not exclude regex option)
                -O, --omit-from-file        File containing a list of database.table entries to skip, one per line (skips before applying regex option)
            -o, --outputdir             Directory to output files to
            -s, --statement-size        Attempted size of INSERT statement in bytes, default 1000000
            -r, --rows                  Try to split tables into chunks of this many rows. This option turns off --chunk-filesize
            -F, --chunk-filesize        Split tables into chunks of this output file size. This value is in MB
            -c, --compress              Compress output files
            -e, --build-empty-files     Build dump files even if no data available from table
            -x, --regex                 Regular expression for 'db.table' matching
            -i, --ignore-engines        Comma delimited list of storage engines to ignore
            -N, --insert-ignore         Dump rows with INSERT IGNORE
            -m, --no-schemas            Do not dump table schemas with the data
            -d, --no-data               Do not dump table data

网站栏目：Mydumper安装报错处理
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