I think it's quite clear I hit 'send' by mistake :) On Wed, Sep 12, 2018 at 05:26:50PM +0200, Carlos Maiolino wrote: > Hi, > > On Wed, Sep 12, 2018 at 01:39:59PM +0200, Troels Hansen wrote: > > Hi Carlos > > > > > > ----- On Sep 12, 2018, at 12:59 PM, Carlos Maiolino cmaiolino@xxxxxxxxxx wrote: > > > > > In the mean time, can you provide more information about the systems where you > > > are hitting this issue? > > > > > > Mainle the storage configuration and the xfs_info output of the affected > > > filesystems. > > > > > > FWIW: > > > http://xfs.org/index.php/XFS_FAQ#Q:_What_information_should_I_include_when_reporting_a_problem.3F > > > > > > $ uname -a > > Linux ged 4.15.0-32-generic #35~16.04.1-Ubuntu SMP Fri Aug 10 21:54:34 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux > > > > > > $ sudo xfs_info /z/home > > meta-data=/dev/sda isize=256 agcount=102, agsize=268435328 blks > > = sectsz=512 attr=2, projid32bit=0 > > = crc=0 finobt=0 spinodes=0 > > data = bsize=4096 blocks=27345289216, imaxpct=1 > > = sunit=128 swidth=256 blks > > naming =version 2 bsize=4096 ascii-ci=0 ftype=0 > > log =internal bsize=4096 blocks=521728, version=2 > > = sectsz=512 sunit=8 blks, lazy-count=1 > > realtime =none extsz=4096 blocks=0, rtextents=0 > > > > Ok, the settings look reasonable for the size of the filesystem, agcount and log > size looks sane, the stripe configuration doesn't though, based on your raid > configuration. And you're using V4 filesystem, which change things a bit. > > > > > $ cat /proc/mounts > > ..... > > /dev/sda /z/home xfs rw,relatime,attr2,inode64,sunit=1024,swidth=2048,noquota 0 0 > > Mounted with different alignment. 512KiB sunit and a 1MiB width. > > > > Raid50, 8 disk per span, 4 spans. > > RAID Level : Primary-5, Secondary-0, RAID Level Qualifier-3 > > Size : 101.869 TB > > Sector Size : 512 > > Parity Size : 14.552 TB > > State : Optimal > > Strip Size : 512 KB > > Number Of Drives per span:8 > > Span Depth : 4 > > So, if I understand correctly your configuration (I'm not really used to dell > namings), you have: > > 4 RAID5 arrays using 8 disk each, nested in a RAID0 array, which has a 512KiB > stripe size. > " If I'm right here, you should be using stripe unit 512K and stripe width 2MiB. (sunit 1024 swidth 4096)" I didn't have too much time to think about it by now, and I am not sure if setting the correct stripe alignment is the culprit here (most likely not), and since I didn't think about it enough yet, I was postponing the e-mail and hit 'send' instead. My apologies about it. I need to give it some extra thought to get some idea on how to help you here, or have any reason to ask you to use a newer kernel. Again, my apologies for hitting send too soon. > > > > 6Gb cache on controller, battery backed up. > > > > Disks are 4Tb Toshiba 12G SAS disks. > > > > Not running LVM. > > > > -- > Carlos -- Carlos
