[Gluster-users] Problem with some files not auto-healing still

[Keith Freedman]

At 05:29 PM 9/17/2008, Will Rouesnel wrote:
>Having fixed my problems with glusterfs crashing (which appears to 
>be related to symlinks in the cluster) I've found my problem with 
>some files not auto-healing has re-emerged. It's the same problem as 
>before - gluster is aware the files exist on the storage brick, but 
>does not heal them to the namespace.
>
>Is there any way I can diagnose this problem? Could it be an issue 
>with gluster being unable to access the files (there are no 
>permission differences between these and others)? How does gluster 
>detect discrepancies between the namespace and bricks?

as I understand it, gluster uses 2 extended attributes.  One for some 
sort of timestamp and another for a version number (I think this is 
slightly changed in 1.4).

based on some criteria these are used to determine which machine has 
the latest version of the file.

what I remember seeing in the past was, if you have a filesystem 
which doesn't have extended attributes enabled, those files never got 
AFR'ed.  so I'm assuming this happens with any file whose extended 
attributes are missing.

I think gluster should, if a file doesn't have extended attributes 
one one machine and does on the other, the one without attributes 
should be overwritte with the other version and then given 
attributes.  but I think this may be so as to preserve files that 
aren't gluster manged, but I've no idea the thought process on that.

However, look at the extended attributes of the files not healing and 
I'll bet something wrong with them.



>
>- Will
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