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I have several ESXi and Xen hypervisors running on CentOS 5.8 x64 connected to an OI + napp-it SAN via Dual Port Intel Pro 1000 PT nics using round-robon MPIO.
From guest VMs on the ESXi boxes I can get 243MB/s read and 247MB/s write to the SAN but from guest VMs on the CentOS boxes I can only get 147MB/s read and 210MB/s write.
CentOS is configured for RR MPIO and i've tried changed the number of ios from 100 / 10 / 3 / 1 in multipath.conf with the best numbers apprearing when set to 1.
Has anyone any pointers of performance tuning iScsi on CentOS with multipath and Intel Pro 1000 nics?
Thanks.
From guest VMs on the ESXi boxes I can get 243MB/s read and 247MB/s write to the SAN but from guest VMs on the CentOS boxes I can only get 147MB/s read and 210MB/s write.
CentOS is configured for RR MPIO and i've tried changed the number of ios from 100 / 10 / 3 / 1 in multipath.conf with the best numbers apprearing when set to 1.
Has anyone any pointers of performance tuning iScsi on CentOS with multipath and Intel Pro 1000 nics?
Thanks.