CentOS7下cratedb备份及恢复(快照)

时间:2023-03-08 17:40:46
CentOS7下cratedb备份及恢复(快照)

一:创建存储库

  1.1 概要

    CREATE REPOSITORY repository_name TYPE type

    [ WITH (repository_parameter [= value], [, ...]) ]

    CRATE REPOSITORY  创建存储库

    repository_name     库名

    WITH          存储库参数

      max_snapshot_bytes_per_sec:  在此存储库单个节点上创建快照的最大速率。

                       默认:40mb每秒

      max_restore_bytes_per_sec:   此存储库在单个节点上还原快照的最大速率。

                       默认:40mb每秒

      

  1.2存储库类型

    1.2.1 fs

      服务端配置:

      centos7配置nfs

        yum -y install nfs-utils rpcbind

      设置服务开机启动:

        systemctl enable rpcbind

        systemctl enable nfs-server

        systemctl enable nfs-lock

        systemctl enable nfs-idmap

      启动nfs服务:

        systemctl start rpcbind

         systemctl start nfs-server

        systemctl start nfs-lock

        systemctl start nfs-idmap

      建立共享目录:

        mkdir -p /nfs

        chmod -R 777 /nfs

      配置需要共享的目录到 /etc/exports

        vim /etc/exports

        /nfs 192.168.10.*(rw,sync,no_root_squash)

      重新加载:

        exportfs -rv

      查看是否挂载:

        showmount -e

        客户端配置:注:客户端不需要启动nfs!

      安装nfs:

        yum -y install nfs-utils

      查看nfs共享目录:

        showmount -e 192.168.x.x

      建立目录:

        mkdir /nfs

      挂载nfs:

         mount -t nfs 192.168.10.205:/nfs /nfs

      如需要卸载:

        unmount /nfs

      查看挂载情况:

        df

      配置客户端开机自动挂载nfs共享目录

      vim /etc/fstab

        添加   192.168.x.x:/nfs /nfs nfs defaults 0 0

      

      配置crate.yml文件nfs选项:

        vim /etc/crate/crate.yml

      添加repo路径:

        path.repo: /nfs/crate

      进入crash:

        ./usr/local/crash

        cr> \c 192.168.x.x:4200

      设置存储库:

        cr> CREATE  REPOSITORY  test205  TYPE  fs WITH  (location = '/nfs/crate');

      

    1.2.2 hdfs

    1.2.3 s3

    1.2.4 url

二:创建快照

    cr> create snapshot test205.snapshot2 all;

  查询快照:

    cr> SELECT repository, name, state, concrete_indices FROM sys.snapshots ORDER BY repository, name;

三:恢复快照

  3.1查询表

    show tables;

  3.1如要从快照还原表,要先删除表:

    DROP TABLE tablename;

  3.2恢复快照

    cr> RESTORE SNAPSHOT test205.snapshot2 TABLE test WITH (wait_for_completion=true);

四:删除快照

  4.1查询快照:

    SELECT repository, name, state, concrete_indices FROM sys.snapshots ORDER BY repository, name;

  4.2删除快照:

    cr> DROP SNAPSHOT test205.snapshot1;

五:删除存储库

  cr> DROP REPOSITORY "OldRepository";

参考:

https://crate.io/docs/crate/reference/en/latest/admin/snapshots.html#creating-a-repository

感谢:

https://blog.csdn.net/wudinaniya/article/details/81068518