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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

1054.0. "defrag and open file" by OTOOA::LACHANCE () Wed Apr 30 1997 13:59

    How does the defragment util handles files that are currently open and
    accessed by users ?
    
    Thanks 
    Francis
T.RTitleUserPersonal
Name
DateLines
1054.1MigrateNNTPD::"carlson@cedar.zso.dec.com"Barry CarlsonTue May 06 1997 15:229
advfs defragment uses a library call to the advfs kernel migrate code.  The
man
page for migrate explains a little.  It is the same code as the utility
"migrate"
uses to migrate a file (defragmenting it in the process).

kernel migrate uses extent map locking to ensure extent maps are consistent 
whenever a user has a copy of a file and subsequently writes it. 
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