Disabling LACP with iSCSI in ESXi4 to Enable MPIO
My mini Atlantis cluster is working well, but I found a document suggesting it can be better -- or another way that it can be better, at least.
It's using iSCSI for the storage, right now, and I have it configured with LACP for redundancy off one bonded channel. I'd hoped to also get some load-balancing from it, but I was young and naive (last week) when I set it up. I've since learned of a better way to set it up. It's all in A Multivendor Post on using iSCSI with VMware vSphere at Virtual Geek .
Here's the money-shot, as I told DD in email:
I'm actually excited that I can improve performance on this little cluster without requiring more capital. Let you know how it goes.
It's using iSCSI for the storage, right now, and I have it configured with LACP for redundancy off one bonded channel. I'd hoped to also get some load-balancing from it, but I was young and naive (last week) when I set it up. I've since learned of a better way to set it up. It's all in A Multivendor Post on using iSCSI with VMware vSphere at Virtual Geek .
Here's the money-shot, as I told DD in email:
- don't have your iSCSI set up with LACP
- set up one vmkX for each NIC you're going to dedicate for iSCSI
- have them not team
- subscribe to each effective target on each interface on the remote side separately
- drop your IOps per path factor to a lower number to reduce stickiness on a particular path and improve the MP part of the IO on lower-speed iSCSI configs.
I'm actually excited that I can improve performance on this little cluster without requiring more capital. Let you know how it goes.
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