Re: [CentOS] 3Ware 9650SE tuning advice

2009-01-16 Thread Laurent Wandrebeck
Hi, about I/O sched, deadline gives better performance. echo deadline /sys/block/sdX/queue/scheduler in /etc/rc.local will do the trick. Someone said to me that setting /proc/sys/vm/dirty_ratio (as a % of total ram) so that it fits into your 3ware cache could be a good idea. I have no numbers to

[CentOS] 3Ware 9650SE tuning advice

2009-01-15 Thread Ray Van Dolson
Hello fellow sysadmins! I've assembled a whitebox system with a SuperMicro motherboard, case, 8GB of memory and a single quad core Xeon processor. I have two 9650SE-8LPML cards (8 ports each) in each server with 12 1TB SATA drives total. Three drives per lane on each card. CentOS 5.2 x86_64.

Re: [CentOS] 3Ware 9650SE tuning advice

2009-01-15 Thread Rob Kampen
Ray Van Dolson wrote: Hello fellow sysadmins! I've assembled a whitebox system with a SuperMicro motherboard, case, 8GB of memory and a single quad core Xeon processor. I have two 9650SE-8LPML cards (8 ports each) in each server with 12 1TB SATA drives total. Three drives per lane on each

Re: [CentOS] 3Ware 9650SE tuning advice

2009-01-15 Thread Ray Van Dolson
On Thu, Jan 15, 2009 at 06:04:59PM -0500, Rob Kampen wrote: Ray, I've had good performance from xfs with large filesystems. What kind of files are you looking to use, lots of smaller files or large media files?? I was leaning towards using XFS as well. We'll probably be handling a lot of

Re: [CentOS] 3Ware 9650SE tuning advice

2009-01-15 Thread Filipe Brandenburger
Hi, On Thu, Jan 15, 2009 at 18:12, Ray Van Dolson ra...@bludgeon.org wrote: I'm not yet sure if I should be using tgtd or IET (iSCSI Enterprise Target). tgtd is already included as a technology preview in RHEL5 (RPM scsi-target-utils, you can install this one in CentOS 5 as well [this is what

Re: [CentOS] 3Ware 9650SE tuning advice

2009-01-15 Thread Ross Walker
On Jan 15, 2009, at 6:12 PM, Ray Van Dolson ra...@bludgeon.org wrote: On Thu, Jan 15, 2009 at 06:04:59PM -0500, Rob Kampen wrote: Ray, I've had good performance from xfs with large filesystems. What kind of files are you looking to use, lots of smaller files or large media files?? I was

Re: [CentOS] 3Ware 9650SE tuning advice

2009-01-15 Thread Ray Van Dolson
On Thu, Jan 15, 2009 at 11:51:40PM -0500, Filipe Brandenburger wrote: Hi, On Thu, Jan 15, 2009 at 18:12, Ray Van Dolson ra...@bludgeon.org wrote: I'm not yet sure if I should be using tgtd or IET (iSCSI Enterprise Target). tgtd is already included as a technology preview in RHEL5 (RPM