I think we may have a performance problem. Our z/800 model 0LF is connected to an ESS800 with two Ficon channel paths. We have been running dbench in Linux for quite a few weeks now and we are seeing numbers much lower than we expected. Can someone commnet on this? Are these numbers about what we should be seeing, or is something wrong with our setup?
We're running RHEL with kernel 2.4.21-1.1931.2.399.ent #1 SMP. Linux is using a single 3390 DASD with ext3. Here are the numbers we're getting: all tests were run on a single guest with no other Linux guests and just a few z/VM service guests running. No disk intestive or CPU intensive workload was running during the testing. dbench clients avg throughout (MB/s) 1 123.111 3 116.729 6 99.0626 9 95.3577 12 95.2825 15 91.6009 18 92.7745 21 91.8808 24 73.8885 Here is what we get with our $1000 Dell Pentiium 2.4Ghz server with a SCSI disk. 1 395.545 3 281.957 6 275.292 9 285.756 12 262.4333 15 248.314 18 237.879 21 221.74355 24 200.873 As you can see, the $1k Dell is hammering our $250k mainframe. We are currently trying to figure out why this is and hopefully fix the problem if there is indeed a problem... Any comments or help that anyone could give woule be appreciated. - Jason Herne ([EMAIL PROTECTED]) Clarkson University Open Source Institute z/Server Administrator
