Activating Backup Compression

Posted on 2005-05-12
Last Modified: 2010-04-03
I am running BExec 9.0 and using a Sony LIB-162/3 AIT Tape Library.

How do I activate compression so that I use less tapes and less backup time?

As it is I backup about 528GB from my Netware Server and a Win 2K3 Appliance Server.  The majority is from the Appliance Server.
Question by:Indy_IT_Admin
    LVL 95

    Expert Comment

    by:Lee W, MVP
    You can't use hardware and software compression - it's redundant and will just slow things down.  Compression is almost certainly being used by the AIT library and backup exec is aware of this and thus disabling the software compression.
    LVL 1

    Author Comment

    Update:  I have found where to choose None Hardware and Software.

    It was on hardware but apparently not working??  Any ideas?

    I have changed it to software.  Maybe that will make a dent.
    LVL 1

    Author Comment

    I think we posted at the same time.   Since BE was already set to hardware and it wasnt working what would you suggest I put BE on?  Software or None?

    I know it did not compress last night because it used 6  100/260 tapes.

    LVL 95

    Accepted Solution

    What kind of data are you backing up?  Databases?  MPEG files?  What?  I found on average, compression (hardware or software) only gets about 20% more - unless your backing up databases, then things compress well.  

    Consult the manual for the AIT unit and ensure hardware compression is on.  I rather suspect it is.  (2:1, 2.6:1 compression ratios advertised by vendors RARELY get close to those numbers).
    LVL 1

    Author Comment

    Storage Data is mainly office files.  The other part is the GW Post Office.
    There is no compression occuring.  Total used space from the Storage Drive and the used space from the PO = the Total backup amount.

    Any ideas on how to check if Compression is enables or not?  Admin Manual has nothing on it and none of the onscreen or web admin have any reference to compression.

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