iSCSI Performance Update
March 15th, 2009
First, if you haven’t already read completely through my last post, the rest of this post won’t make a whole lot of sense. In summary, I had complained about the performance I was getting using iSCSI on my network.
I noticed this on the Openfiler administration page today.
Notice the highlighted drop packets on the eth1.
I bonded the two NICs together, and configured them for load balancing, but apparently eth1 is having some problems. This is probably due to the NICs not being identical. I’ve gone ahead and removed eth1 from the bond. Hopefully when I configure the SQL Cluster today, I’ll have better things to say about the iSCSI through-put.
These network statistics are bothering me. I removed the eth1 device, and sure enough performance is great now!
However, look at the Received stats, between the 2 NICs, we see a total of 110.52 megabits worth of traffic, or 13.815 megabytes. There is currently 3,409 megabytes stored on the iSCSI disk.
Sooooo, what am I missing here?
Obviously the data got there over the network. Is block level file transfers different in network traffic size than file level?