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Conference decwet::advfs_support

Title:AdvFS Support/Info/Questions Notefile
Notice:note 187 is Freq Asked Questions;note 7 is support policy
Moderator:DECWET::DADDAMIO
Created:Wed Jun 02 1993
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1077
Total number of notes:4417

1038.0. "Advfs and LSM backup question ?" by HGOVC::SIUKEUNGLEE () Thu Apr 10 1997 06:02

    Hi,
    
    I have configured the AdvFS on top of LSM volume. Can I uses the
    LSM's snapshot to backup my temp volume created by "volassist
    snapstart" & "volassist snapshot" ? Or I can only uses the cloneset
    to backup the file system online.
    
    Wellcome any suggestion.
    
    David Lee.
T.RTitleUserPersonal
Name		DateLines
1038.1Use ADVFS clonefset...BRSSWS::DEVOSManu Devos DEC/SI Brussels 856-7539Thu Apr 10 1997 07:3216
    Hi David,
    
    While you can use "volassist snapshot" to create a "copy volume", you
    will not be able to mount it on any mount point, because ADVFS does not
    accept to mount "twice" the "same" filesystem.
    
    So you should better use the ADVFS clonefset for the backup. Moreover,
    creating a clonefset is VERY VERY FASTER than LSM snapshot as only the
    hierarchy structure is copied.
    
    But, be carrefull if you intend to backup the clonefset by NetWorker as
    it regards any file in the ADVFS clone as a "sparse" file and can
    transform an oracle flat file in a sparse one !!!
    
    Manu.