[Gluster-users] AFR replication/healing question

devzero at web.de devzero at web.de
Sat Oct 11 10:04:32 UTC 2008

hello !

i have a question regarding AFR:

when AFR changes trusted.glusterfs.version  only on close() - how does glusterfs behave regarding re-sync if files are still open?

let`s say, i put some mysql database on a glusterfs with AFR - now that database is online and one glusterfs node goes down - how can i make sure that data is resynced when the failed node comes up again (as mysql probably never closes the file descriptor to the datafiles and thus ).

does AFR check for file`s mtime ?

does only open() trigger the resync ?

what happens if a resync is being triggered and while in resync, data is being written to that file ?

the docs at http://www.gluster.org/docs/index.php/Understanding_AFR_Translator don`t tell about this in depth - so i`m just a little bit unsure how files getting synced if they typically never being opened or closed at runtime. 


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