[colug-432] Linux Storage Performance Mystery

[Joseph Beard]

On Sep 25, 2016, at 9:54 PM, Brian <bnmille at gmail.com> wrote:

> XFS was specifically designed for large file systems.  And the EXT file system is not known as a performance powerhouse.  So I would convert those filesystems back to XFS.  Then you would be able to see if that new controller is causing issues.

I converted the `/mnt/backup` partition back to XFS. That alone has solved the two performance degradations I was experiencing! I would not have expected such a _large_ difference between those two. I’m not intimately familiar with how either of those filesystems are built, but I am very curious what makes this such a degenerate case for ext4. Does ext4 not deal well with large numbers of hard linked files?

Now for the tricky part: converting the `/srv` partition back to XFS. I no longer have a spare drive large enough to hold its contents while I reformat the partition…

Thanks for your help!


Joe


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Joseph Beard
joseph at josephbeard.net