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xen-users
Re: [Xen-users] Network based storage - NBD/AoE/iSCSI other?
On Sun, 8 Oct 2006, Thomas Harold wrote:
My main point was that compared to a 1GB Ethernet 'dedicated to storage'
network, a 1GB FC network is cheaper and faster; I believe this to be
true even if your end disks are SATA. (but like I said, I might be wrong
on that part; I'm not really familiar with pricing for network-attached
IDE arrays; I can't afford gigabit Ethernet equipment of a quality I'd like
to maintain, and I use 10 or 15K scsi/FC for everything that matters
anyhow.)
For a small business, you can probably setup a small SAN for not that much.
16/24 port "smart" gigabit switches that support VLANs, trunking, jumbo
frames can be had for under $500. Put two of those together and you have a
fault-tolerant SAN fabric. Dual-port server gigabit NICs for $180 each to
connect to the SAN switch fabric. Do some bonding of multiple dual/quad port
NICs for bandwidth / fault-tolerance on the SAN unit.
16 port 1G fibre-channel brocades go for around $100. how much are the 16
port cisco gig switches?
That's probably the biggest argument for iSCSI/AoE vs FC. You can get
started for under $10k, prove that it works, then decide where you want to
spend more money on additional performance while reusing the old equipment to
spruce up other sections of your network.
my point is that the iscsi/AoE solution is more expensive, for less
performance when compared to a FC solution. you can recoup some of that
by reusing the switches later, but it's still more expensive.
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