[Linux-cluster] gfs_fsck fails on large filesystem

[Joe]

Robert Peterson wrote:

> We've tried to kick around ideas on how to improve the speed, such as
> (1) adding an option to only focus on areas where the journals are dirty,
> (2) introducing multiple threads to process the different RGs, and even
> (3) trying to get multiple nodes in the cluster to team up and do 
> different
> areas of the file system.  None of these have been implemented yet
> because of higher priorities.  Since this is an open-source project, 
> anyone
> could step in and do these.  Volunteers?
>

I've tried to look at the code many times. But, as a clustered file 
system is a complex thing, it gets hard to figure out what it's all 
about. I tried to find a "big picture" documentation, at least for 
on-disk layout. The only nearest thing i've found is : 
http://opengfs.sourceforge.net/docs.php , which is the documentation 
written at the time OpenGFS forked from Cistina's code. Although 
principles may still be the sames (or not ?), the code has obviously 
changed and on-disk layout may not be the same, too.
So, is there some sort of documentation about the  principles found in 
OpenGFS (not a design doc, i've read 
/usr/src/linux/Documentation/stable_api_nonsense.txt) ? This would much 
help anybody who wishes to enter the code to do it more efficientely...

--
Mathieu