NFS - iSCSI and FC/FCoE to come once I get it into the proper lab.
From: Richard Elling [mailto:richard.ell...@gmail.com] Sent: Tuesday, July 24, 2012 11:36 PM To: matth...@flash.shanje.com Cc: zfs-discuss@opensolaris.org Subject: Re: [zfs-discuss] IO load questions Important question, what is the interconnect? iSCSI? FC? NFS? -- richard On Jul 24, 2012, at 9:44 AM, matth...@flash.shanje.com wrote: Working on a POC for high IO workloads, and I'm running in to a bottleneck that I'm not sure I can solve. Testbed looks like this : SuperMicro 6026-6RFT+ barebones w/ dual 5506 CPU's, 72GB RAM, and ESXi VM - 4GB RAM, 1vCPU Connectivity dual 10Gbit Ethernet to Cisco Nexus 5010 Target Nexenta system : Intel barebones, Dual Xeon 5620 CPU's, 192GB RAM, Nexenta 3.1.3 Enterprise Intel x520 dual port 10Gbit Ethernet - LACP Active VPC to Nexus 5010 switches. 2x LSI 9201-16E HBA's, 1x LSI 9200-8e HBA 5 DAE's (3 in use for this test) 1 DAE - connected (multipathed) to LSI 9200-8e. Loaded w/ 6x Stec ZeusRAM SSD's - striped for ZIL, and 6x OCZ Talos C 230GB drives for L2ARC. 2 DAE's connected (multipathed) to one LSI 9201-16E - 24x 600GB 15k Seagate Cheetah drives Obviously data integrity is not guaranteed Testing using IOMeter from windows guest, 10GB test file, queue depth of 64 I have a share set up with 4k recordsizes, compression disabled, access time disabled, and am seeing performance as follows : ~50,000 IOPS 4k random read. 200MB/sec, 30% CPU utilization on Nexenta, ~90% utilization on guest OS. I'm guessing guest OS is bottlenecking. Going to try physical hardware next week ~25,000 IOPS 4k random write. 100MB/sec, ~70% CPU utilization on Nexenta, ~45% CPU utilization on guest OS. Feels like Nexenta CPU is bottleneck. Load average of 2.5 A quick test with 128k recordsizes and 128k IO looked to be 400MB/sec performance, can't remember CPU utilization on either side. Will retest and report those numbers. It feels like something is adding more overhead here than I would expect on the 4k recordsizes/IO workloads. Any thoughts where I should start on this? I'd really like to see closer to 10Gbit performance here, but it seems like the hardware isn't able to cope with it? Theoretical peak performance for a single 10GbE wire is near 300k IOPS @ 4KB, unidirectional. This workload is extraordinarily difficult to achieve with a single client using any of the popular storage protocols. -- richard -- ZFS Performance and Training richard.ell...@richardelling.com +1-760-896-4422
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