
Originally Posted by
Butuz
When you say "Virtualise Everything" exactly what do you mean?
Be careful about cutting costs - the last thing you want to do is actually reduce performance.
What storage software are you planning on using on your PE2950s to actually make them a "SAN"? Be aware that shoving a load of disks into any old Win2k8 server does not magically make a SAN, especially if we're talking about a comparison with the Sun 7110 which is a ground up purpose build high performance storage system with super easy management, full redundancy, self healing and easy expansion options.
How are your nodes going to connect to the PE2950s via iSCSI?
How are your PE2950s going to synchronise the data between themselves in real time.
How do you know the 5 x slow 7200rpm drives will give you the performance and reliability you need?
How are you going to expand the SAN when you run out of room?
The SAN is the cornerstone of your virtualisation effort, and skimping on it to save a grand or two is probably not a good idea. Of course - it depends on what you need, if your only virtualising a few low use servers then what you have suggested will be fine, if on the other hand you are virtualising many servers of differering types (domain controller, terminal server, web, exchange, SIMS, etc) then, in my humble oppinion, ignoring the 7110s and shaving £3k odd off the final price is going to come back and bite you in the bum good and hard in the future, when you need performance, or you need expandability, and you have neither.
Lets do an alternative costing on based on the Matching Grant prices Linescanner can provide:
Storage:
2 x Sun 7110 (16 x 146GB, Quad Core Opteron, 8GB RAM, 4 x Gig-E ports) @ £4300 Each
2 x Sun Fire X2200M2 (2 x Quad Core Opteron 1.9, 8GB RAM, 4 x Gig-E ports, no HDD) @ £775 Each
4 x 73GB 10KRPM SAS Drive for above @ £105 Each
Total = £10570, so thats £2570 extra.
But for that £2750 extra you get Mirrored SAN's that are super fast, super easy to expand in the future, and super easy to set up and manage now, and you also get two nodes that are twice as powerful as the dell units.
Thats my 2p anyway. Whether you need the extra speed/reliability/managability the above can provide is up to you!
Butuz