rsync of backups/extras increases in size at target
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Thread: rsync of backups/extras increases in size at target

  1. #1
    Active Member
    Join Date
    Dec 2014
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    10

    rsync of backups/extras increases in size at target

    Dear Zextras friends,

    I was setting up the rsync backup script (from my production server to an NFS-mounted filesystem off the backup server) and wanted to test the rsync speed.

    # rsync -av /opt/zimbra/backup /Backups/ZIMBRA/backuptest

    When finished, I checked the size of the two directories:
    • /opt/zimbra/backup is 9.9GB
    • /Backups/ZIMBRA/backuptest is 40 GB (!!!!)


    I have searched high and low in /opt/zimbra/backup for any symlinks (or hard links) that could explain /Backups/ZIMBRA/backuptest blowing up in size (by copying over also the targets of the links during rsync) but have found nothing! I would like to remove the /Backups/ZIMBRA/backuptest but now I am worried that if I: rm -rf backuptest I may remove files on the server that are symbolically linked.

    I would be grateful if I could understand the reason for this file growth and then figure out how to safely remove the rsync-ed directory tree in the target. Has anyone seen this behavior before?

    Any pointers would be greatly appreciated!

    Thank you for any help!
    George

  2. #2
    CTO ZeXtras Employee d0s0n's Avatar
    Join Date
    Apr 2011
    Posts
    574
    Hi George,

    I can assure that zxbackup doesn't make use of sim-links/hard-link or sparse files, so I can only suggest to check the block-size of your destination filesystem, because there are many small files, especially under the accounts folder (metadata).

    Have a nice day
    D0s0n
    ZeXtras Website # ZeXtras Wiki # ZeXtras Store

    Head of ZeXtras System Administrators

  3. #3
    Active Member
    Join Date
    Dec 2014
    Posts
    10
    Thank you! and you are absolutely right! After repeated tests and checking the difference is in the block file size!

    Thanks again!
    d0s0n likes this.

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