Re: Strange performance results in RAID5

2001-03-29 Thread Kalvinder Singh
Neil Brown wrote: 1/ you didn't say how fast your SCSI buss is. I guess if it is reasonably new it would be at least 80Mb/sec which should allow 500 * 64K/s but it wouldn't have to be too old to not allow that, and I don't like to assume things that aren't stated. I should

Strange performance results in RAID5

2001-03-28 Thread Kalvinder Singh
Hi, I have been doing some performance checks on my RAID 5 system. The system is 5 Seagate Cheetahs X15 Linux 2.4.2 I am using IOtest 3.0 on /dev/md0 My chunk size is 1M... When I do random reads of 64K blobs using one process, I get 100 reads/sec, which is the same as doing random reads on

Re: Strange performance results in RAID5

2001-03-28 Thread Neil Brown
On Thursday March 29, [EMAIL PROTECTED] wrote: Hi, I have been doing some performance checks on my RAID 5 system. Good. The system is 5 Seagate Cheetahs X15 Linux 2.4.2 I am using IOtest 3.0 on /dev/md0 My chunk size is 1M... When I do random reads of 64K blobs using one