On 05/06/2013 23:52, Heinrich van Riel wrote: > Any pointers around iSCSI performance focused on read speed? Did not find > much. > > I have 2 x rz2 of 10x 3TB NL-SAS each in the pool. The OI server has 4 > interfaces configured to the switch in LACP, mtu=9000. The switch (jumbo > enabled) shows all interfaces are active in the port channel. How can I can > verify it on the OI side? dladm shows that it is active mode > > [..snip..]
Hi Heinrich, Your limitation is LACP. Even in a link bundle, no single connection can exceed the speed of a single physical link - this is necessary to maintain correct packet ordering and queuing. There's no way around this other than to put fatter pipes in or not use LACP at all. You should definitely have a look at iSCSI multipath. It's supported by VMware, COMSTAR and a host of other products. All you need to do is configure multiple separate subnets, put them on separate VLANs and tell VMware to create multiple vmkernel interfaces in separate vSwitches. Then you can scan your iSCSI targets over one interface, VMware will auto-discover all paths to it and initiate multiple connections with load-balancing across all available paths (with fail-over in case a path dies). This approach also enables you to divide your storage infrastructure into two fully independent SANs, so that even if one side of the network experiences some horrible mess (looped cables, crappy switch firmware, etc.), the other side will continue to function without a hitch. Cheers, -- Saso _______________________________________________ OpenIndiana-discuss mailing list [email protected] http://openindiana.org/mailman/listinfo/openindiana-discuss
