Server Technical Specification Working Session
16:06:36 <sgallagh> simo: To answer your question about
overcommit: that is *possible*, but we can be smarter about it in the default partitioning
Anaconda currently disallows overcommitting.
15:48:19 <mitr> (Again, having a per-directory instead of
per-user quotas would be rather beneficial here)
A related item that came up is quotas. XFS supports project quotas. So that's possible
in the case where you're on the fence if something should have a separate LV. Project
quotas were just proposed as an ext4 feature last month.
My two small concerns about LVM thinp by default:
1. XFS is highly parallel + the parallel writes is a trigger for the current thinp
fragmentation issue. So it's a "good" combination to reveal this problem.
2. There is an outstanding bug between XFS and LVMthinp that I think the LVM folks might
need to be pinged on. The wrong number of XFS AG's is being assigned to virtual size
LVs and this will reduce performance.