Anton Aylward wrote:
Dave Howorth said the following on 06/11/2012 06:16 AM:
Anton Aylward wrote:
I just tried converting a FS from reiser to ext4 and got a ridiculous 'out of space' message - it turned out that the 'lots-a-small-files' meant I ran out of inodes long, long before I ran out of data space. FWIW, I use Reiser for the reason of lots of small files. I have tried both ext4 and xfs instead but both gave worse performance.
This is what I am finding ...
FYI, there might be another factor, if you use RAID. I just saw this comment by Dave Chinner on the XFS list: "The reason, I'd suggest, is that you've chosen the wrong RAID volume type for your workload. Small random file read and write workloads like news and mail spoolers are IOPS intensive workloads and do not play well with RAID5/6. RAID5/6 really only work well for large files with sequential access patterns - you need to use RAID1/10 for IOPS intensive workloads because they don't suffer from the RMW cycle problem that RAID5/6 has for small writes. The iostat output will help clarify whether this is really the problem or not..." Luckily for me, I do use RAID10 on the XFS filesystem I do have, not because I'm clever but because the hardware I thought would do RAID6 turned out not to! So I've been content with mdadm RAID10 instead. Lucky escape :) -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org