On Aug 08, 2007 15:21 -0500, Rene Salmon wrote: > I am having some strange performance issues with ext3 and I am hoping to > get some advice/hints on how to make this better. First some background > on the setup. > > We have a RAID 5 array 10+1+1 with one LUN. That is 10 SATA drives one > parity drive and one dedicated spare. The LUN is about 6.5TB. > > Using a 2Gbit/sec fiber channel card I can do some dd writes to the raw > device and get speeds close to 200Mbytes/sec which is more or less the > max the card can do. > > Next I create an xfs file system on the LUN and do a dd to xfs and get > speeds close to 150Mbytes/sec. > > I want to use ext3 not xfs so next I put ext3 on the lun. Now when I do > the dd to the ext3 lun I get 25-50Mbytes/sec depending on whether I have > the Raid controller cache turned on or off. Getting 50MBytes/sec with > the raid controller cache turned off. > > I know that ext3 should perform better so I must be doing something > wrong. Here is my mkfs.ext3 > > mkfs.ext3 -b4096 -Tlagefile4 /dev/dm-0 You could also try out ext4, that's where the real performance improvements are... Cheers, Andreas -- Andreas Dilger Principal Software Engineer Cluster File Systems, Inc. _______________________________________________ Ext3-users mailing list Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
