On Jan 22, 2008 4:26 AM, FUJITA Tomonori <fujita.tomonori@xxxxxxxxxxxxx> wrote: > > First, I recommend you to examine iSER stuff more since it has some > parameters unlike SRP, which effects the performance, IIRC. At least, > you could get the iSER performances similar to Pete's. Apparently open-iscsi uses the following defaults: node.session.iscsi.FirstBurstLength = 262144 node.session.iscsi.MaxBurstLength = 16776192 node.conn[0].tcp.window_size = 524288 node.conn[0].iscsi.MaxRecvDataSegmentLength = 131072 I have tried to change some of these parameters to a larger value, but this did not have a noticeable effect (read bandwidth increased less than 1%): $ iscsiadm --mode node --targetname iqn.2007-05.com.example:storage.disk2.sys1.xyz --portal 192.168.102.5:3260 --op update -n node.session.iscsi.FirstBurstLength -v 16776192 $ iscsiadm --mode node --targetname iqn.2007-05.com.example:storage.disk2.sys1.xyz --portal 192.168.102.5:3260 --op update -n node.session.iscsi.MaxBurstLength -v 16776192 $ iscsiadm --mode node --targetname iqn.2007-05.com.example:storage.disk2.sys1.xyz --portal 192.168.102.5:3260 --op update -n "node.conn[0].iscsi.MaxRecvDataSegmentLength" -v 16776192 Bart. - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
