I'd like to benchmark I/O performance with different QLogic driver queue depth. According to http://publib.boulder.ibm.com/infocenter/svcic/v3r1m0/index.jsp?topic=/com.ibm.storage.svc.console.doc/svc_linsetqdepth_1dcv4w.html I need to mkinitrd after I make the changes in /etc/modprobe.conf. Why? I won't change kernel. This is for both RH 4 and 5. I think I can check the current queue depth by any of the following: cat /sys/class/scsi_device/*/device/queue_depth grep "queue depth" /proc/scsi/qla2xxx/* (only found on RH4) cat /proc/scsi/sg/device_hdr /proc/scsi/sg/devices (the qdepth column) It looks like RH4 uses 16 and RH5 32. (In case you ask why, this article http://dsstos.blogspot.com/2008/12/hostlun-queue-depths-command-taq.html inspires me to do the test.) Yong Huang -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list
