Gino, I have always found /dev/zero (on solaris) much slower than reading a file from another diskarray on the same system (Never bothered to find out why). Therefore you may not be comparing apples with apples. It may have changed since I last used it though. I used to have a little C program I used to thrash disks. Now days I just use filebench. ( It is supposed to have some linux support )
Doug > Hello, > > Server DL585, S10u2 > local storage: SmartArray 5+,64MB cache > 50%read/50%write, mirror 2x72GB 15k rpm. > SAN: StorageWorks EVA5000, 4x146GB, 10k rpm disks > exported as single luns > > TEST: dd if=/dev/zero of=TESTFILE bs=<various> > count=10000000 > > RESULTS: > local storage, ufs: 24MB/s > SAN single lun, zfs: 18MB/s > SAN 2 luns, zfs mirros, 30MB/s > SAN 4 luns, zfs 2 mirrors, 37MB/s > > COMPARISON: > DL385, Freebsd5.4, SAN RAID5 over 4 disks, 64MB/s > > Why so low performances? Any tunings? This message posted from opensolaris.org _______________________________________________ storage-discuss mailing list [EMAIL PROTECTED] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
