Re: [Lustre-discuss] OSS Service Thread Count

2009-01-26 Thread Brian J. Murrell
On Mon, 2009-01-26 at 00:01 -0500, Oleg Drokin wrote: Hello! In addition to Oleg's suggestions... Essentially what is happening is your drives are only able to sustain certain amount of parallel i/o activity before degrading the performance due to all the seeking going on. Ideally you

[Lustre-discuss] OSS Service Thread Count

2009-01-25 Thread Wojciech Turek
Hi, My lustre system specs: Lustre-1.6.6 RHEL4 2 lustre file systems: one consists of 4 OSTs and other consists of 20 OSTs 4 x OSS/6OSTs Storage: S2A9500 Clients: 600 Interconnect: Ethernet I noticed that my OSSs sometimes report very high load (around 500). I read that increasing number

Re: [Lustre-discuss] OSS Service Thread Count

2009-01-25 Thread Oleg Drokin
Hello! On Jan 25, 2009, at 6:56 PM, Wojciech Turek wrote: For my particular case it gives 512 ost_num_threads which is the Lustre max number for this particular parameter. Manual says that each thread uses actually 1.5MB of RAM, so 768MB of RAM will be consumed on each of my OSSs for