iSCSI / Virtuozzo Host Machine Setup
Current setup is as I believe most hosts do, Dual CPU Intel/AMD, 4-8GB RAM and local RAID storage using a 3Ware 8xxx/9xxx
Now what I'm thinking is the following (and I'm quite willing for people to say it sucks as I'm don't want to spend waste money )
A central NAS running 1Tb of RAID-10 storage (3Ware 9550-SX, 8x250GB disks) from my normal system builder. Out of this would be 3 or 4 1Gbit network cards which goes into a central 1Gbit switch and then this is present as iSCSI (which VZ 3.0 supports)
Now at absolute max output under ideal conditions the 3Ware will push ~380Mb/s so having multiple ports will allow load balancing (as a side note the OS on the central NAS is designed for this and does auto load balancing http://www.open-e.com/)
The front end nodes would then be normal host machines but with a small local disk to boot off and for the basic binaries. /vz would be the iSCSI mount and the system would then boot off as normal.
Question is am I going to see a drop in performance which will have a major negative impact on customers. Now I'm aware there will be a small drop, and I'm reading over this a lot currently I figure the advatages outway the the small performance drop (ability to backup everything at once onto another storage system, quick migrations of VPS's between nodes and quick recovery in the event of server failure)
Of course there is also now a single point of failure in the NAS and thats something I'm still looking at. Of course there is also FC but taking the price points etc its a bit to rich for my pocket currently
So anyone done something like this?
Rus
