[Gluster-users] Slow read performance

Whit Blauvelt whit.gluster at transpect.com
Mon Mar 11 18:03:35 UTC 2013

As I read this:

>             https://bugzilla.redhat.com/show_bug.cgi?id=838784

the bug is, from Gluster's POV, between ext4 and the kernel. Is this
correct, that Gluster can't safely use ext4 on recent kernels until ext4's
relationship with the kernel is fixed? If Gluster can't be simply patched to
fix this, and we want to use ext4 (for which there are good arguments,
including a rich toolset), should we be leaning more on the ext4 developers?

I see there's a wiki we might document the brokenness on at
https://ext4.wiki.kernel.org/ which mentions nothing about Gluster
compatibility, and a bugzilla at

Searching for "ext Gluster" there gives "Zarro Boogs found" though. Should
someone who can make a fuller report on this bug than I can be making sure
that the ext4 project is focused on this problem?

Update: Got interrupted before sending this off. I see from other emails
since that T'so has been leaned on, and apparently doesn't want to fix
ext4?! I know Ted's got rank. But should we collectively be trying to push
this to Linus's attention? I'm unclear whether for practical purposes Ted
just _is_ ext4, or whether his co-developers count there.


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