Linux服务器数据定期同步和备份方式

Use rdiff-backup

• Start backup

rdiff-backup --no-compression --print-statistics user@host::/home/user/source_dir destination_dir

If the destination_dir exists, please add --force like rdiff-backup --no-compression --force --print-statistics user@host::/home/user/source_dir destination_dir. All things in original destination_dir will be depleted.

If you want to exclude or include special files or dirs please specify like --exclude '**trash' or --include /home/user/source_dir/important.

• Timely backup your data

Add the above command into crontab (hit 'crontab -e' in terminal to open crontab) in the format like 5 22 */1 * * command which means executing the command at 22:05 everyday.

• Restore data

Restore the latest data by running rdiff-backup -r now destination_dir user@host::/home/user/source_dir.restore. Add --force if you want to restore to source_dir.

Restore files 10 days ago by running rdiff-backup -r 10D destination_dir user@host::/home/user/source_dir.restore. Other acceptable time formats include 5m4s (5 minutes 4 seconds) and 2014-01-01 (January 1st, 2014).

Restore files from an increment file by running rdiff-backup destination_dir/rdiff-backup-data/increments/server_add.2014-02-21T09:22:45+08:00.missing user@host::/home/user/source_dir.restore/server_add. Increment files are stored in destination_dir/rdiff-backup-data/increments/server_add.2014-02-21T09:22:45+08:00.missing.

• Remove older records to save space

Deletes all information concerning file versions which have not been current for 2 weeks by running rdiff-backup --remove-older-than 2W --force destination_dir. Note that an existing file which has not changed for a year will still be preserved. But a file which was deleted 15 days ago can not be restored after this command. Normally one should use --force since it is used to delete multiple increments at the same time which --remove-older-thanrefuses to do by default.

Only keeps the last n rdiff-backup sessions by running rdiff-backup --remove-older-than 20B --force destination_dir.

• Statistics

Lists increments in given golder by rdiff-backup --list-increments destination_dir/.

Lists of files changed in last 5 days by rdiff-backup --list-changed-since 5D destination_dir/.

Compare the difference between source and bak by rdiff-backup --compare user@host::source-dir destination_dir

Compare the sifference between source and bak (as it was two weeks ago) by rdiff-backup --compare-at-time 2W user@host::source-dir destination_dir.

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