Padmanabhan wrote: > 3. what other parameters have to be considered when implementing > software based initiators and targets ? >
I noticed on the initiator side we sometimes get better performance when we set the max command buffer size smaller. The default is really large - something like 512k. If you write to the block queues sysfs max_sectors_kb file (/sys/block/sdXYZ/queue/max_sectors_kb) you can change this. I found that 64k sometimes works. But on other targets and setups big commands are better. I have not narrowed down specifically which and when to use unless I actually run some IO. Also on the initiator side changing the io scheduler to noop works better. Soemtimes it is worse :) But you set it by writing to /sys/block/sdXYZ/queue/scheduler > Thanks for sharing your expertise and time > > Regards > Padmanabhan > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "open-iscsi" group. To post to this group, send email to open-iscsi@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/open-iscsi -~----------~----~----~----~------~----~------~--~---
