Hi, I'm trying to test iSCSI under VMWare.
I've been told to first test raw disk using disktest: reads disktest -PT -T30 -K32 -B128k -ID /dev/sdXYZ -h1 writes disktest -PT -T30 -K32 -B128k -ID /dev/sdXYZ -h1 -D 0:100 If I use this configuration I get around 90 MB/s for writes and 1900 MB/s for reads. If I add the flag -If then is meant to fsync after each write (this deactivates the cache, right?) then the performances lows to 5 MB/s for writes and 34 MB/s for reads To compare, the local drive (not the iSCSI drive), I get using cache 374.60MB/s in writes and 2290.25MB/s in reads and without cache 8.10MB/s for writes and 30.12MB/s for reads. When I use dd for filesystem benchmarking for writes: dd if=/dev/zero of=/mnt/raid1/zero bs=4096 count=1572864 or dd if=/dev/zero of=/mnt/raid1/zero bs=128k count=52428 and reads: dd if=/mnt/virtualdata1/zero of=/dev/null bs=4096 or dd if=/mnt/raid1/zero of=/dev/null bs=128k I enabled noop scheduler: echo noop > /sys/block/sdc/queue/scheduler The results that I get from dd are much closer to the disktest using fsync. I've enabled noatime in the mounting options but I don't get better results. am I getting reasonable results? Miguel --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to email@example.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---