[rhelv6-list] RHEL6.2 XFS brutal performence with lots of files
jussi_rhel6 at silvennoinen.net
Tue Jun 5 20:10:20 UTC 2012
> I've been noticing lots of annoying problems with XFS performance with
> RHEL6.2 on 64bit. I typically have 20-30 TB file systems with data
> structured in directories based on day of year, product type, for example,
> Doing operations like tar or rm over these directories bring the system to a
> grinding halt. Load average goes vertical and eventually the power button
> needs to be pressed in many cases :( A hack workaround is to break apart the
> task into smaller chunks and let the system breath in between operations...
> Anyway, I read Ric Wheeler's "Billion Files" with great interest
> It appears there are 'known issues' with XFS and RHEL6.1. It does not appear
> these issues were addressed in RHEL 6.2?
> Does anybody know if these issues were addressed in the upcoming RHEL 6.3? My
> impression is that upstream fixes for this only recently (last 6 months?)
> appeared in the mainline kernel.
> Perhaps I am missing some tuning that could be done to help with this?
Enabling lazy-count does wonders for workloads that involve massive
amounts of metadata. Unfortunately it's a mkfs-time option only AFAIK.
More information about the rhelv6-list