Re: [Xen-users] Linux Fiber or iSCSI SAN

[Errol Neal <eneal@xxxxxxxxxxxxxxxxx>]

> I've settled Ubuntu boxes booted via DRBD running SCST OR ESOS. 
> From a performance perspective, I have pretty large customer that two XCP 
> pools running off a Dell MD3200F using 4GB FC. To compare, I took a Dell 2970 
> or something like that, stuck 8 Seatgate 2.5" Constellation Drives in it, a 
> 4GB HBA and installed ESOS on it. 
> I never got around to finishing my testing, but the ESOS box can definitely 
> keep up and things like LSI cachecade would really help to bring it to a more 
> enterprise-level performance with respect to random reads and writes. 
> Lastly, there is such an abundance of DIRT CHEAP,  lightly used 4GB FC 
> equipment on the market today that I find it interesting that people still 
> prefer iSCSI. iSCSI is good if you have 10GBE which is still far to expensive 
> per port IMO. However, you can get 2 - 4 port, 4GB FC Hbas on ebay for under 
> 100 bucks and I generally am able to purchase fully loaded switches (brocade 
> 200e) for somewhere in the neighborhood of 300 bucks each! 
> MPIO with 2 FC ports from an initiator to a decent target can easily saturate 
> the link on basic sequential r/w write tests. Not to mention, improved 
> latency, access times, etc for random i/o. 

Correction.. This was an MD3600F not 3200. Sorry. 12 Drives, Dual controllers.

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