Oh wait, I misread your previous post. If I understand correctly, the actual files that will be read are actually multi-gigabyte VM images. I wonder how well XFS would perform in such a case, since I guess it wouldn't directly have to do a ton of directory lookups and such, but instead seek inside a continous file. On 10/20/2011 04:57 PM, Gerald Brandt wrote: > Thanks for the ext4 comments. My issues with ext4 (and 3) are the long fsck times. In case of a reboot, w need to be up, and not waiting hours for 6 TB to fsck. > > Gerald > > > ----- Original Message ----- >> From: "Robert Krig" <robert at bitcaster.de> >> To: gluster-users at gluster.org >> Sent: Thursday, October 20, 2011 8:53:50 AM >> Subject: Re: Optimal XFS formatting? >> >> >> Try using ext4 if you can. Small file read performance will be MUCH >> better than xfs. >> On the other hand, you might wanna run some benchmark tests which >> resemble your workload, to compare xfs vs ext4 both with and without >> glusterfs. >> >> >> >> >> >> On 10/20/2011 03:36 PM, Sabuj Pattanayek wrote: >>> Hi, >>> >>> I've seen that EXT4 has better random I/O performance than XFS, >>> especially on small reads and writes. For large sequential reads >>> and >>> writes XFS is a little bit better. For really large sequential >>> reads >>> and write EXT4 and XFS are about the same. I used to format XFS >>> using >>> this: >>> >>> mkfs.xfs -l size=64m >>> >>> (notes from >>> http://everything2.com/title/Filesystem+performance+tweaking+with+XFS+on+Linux) >>> >>> but realized that it doesn't seem to effect performance for me. You >>> should definitely try mounting with this : >>> >>> mount -t xfs -o rw,noatime,nodiratime,logbufs=8 >>> >>> HTH, >>> Sabuj >>> >>> On Thu, Oct 20, 2011 at 8:18 AM, Gerald Brandt <gbr at majentis.com> >>> wrote: >>>> Hi, >>>> >>>> Are there any 'optimal' settings for XFS formatting under >>>> GlusterFS? The storage will be used for Virtual Disk storage, >>>> virtual disk size from 8GB to 100 GB in size. >>>> >>>> One of the VM's (separate gluster volume) will be running MSSQL >>>> server (4K reads and writes). The other will be running file >>>> servers, etc). >>>> >>>> Thanks, >>>> Gerald >>>> _______________________________________________ >>>> Gluster-users mailing list >>>> Gluster-users at gluster.org >>>> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users >>>> >>> _______________________________________________ >>> Gluster-users mailing list >>> Gluster-users at gluster.org >>> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users at gluster.org >> http://gluster.org/cgi-bin/mailman/listinfo/gluster-users >> > _______________________________________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://gluster.org/cgi-bin/mailman/listinfo/gluster-users
