[Linux-cluster] iSCSI GFS

[Johannes Russek]

Hi Mike,

> In fact, it got me wondering if my FC path might not be the greatest based on 
> Gordan's (I think it was) input on the subject. I've also seen a few posts 
> about iSCSI lately. Can anyone shed a little light on iSCSI and what I would 
> need to give it a try.
>   
I've heard that http://www.openfiler.com/ is probably the easiest way to 
get an iSCSI target up and running. Didn't try it yet, though.
But i've got to say, that SAN and performance thing really depends on 
how you do things. I've got a five node Cluster with GFS over FC running 
here, and it is pretty fast. Compared to friends of mine who use 
SAS-DAS, the bulk performance was about as fast. We are mostly serving 
files from it (FTP/HTTP), so write-performance is not so much an issue. 
It might be that it's usually slower then local disks, but I guess it 
really depends on your overbooking ratio. We are happy with the 
performance :)
Also I wonder if iSCSI does protect Block-Integrity as FC does. That's 
one of the things that make FC so robust, isn't it?
Anyone knows anything about this?
enjoy,
Johannes