[THIN] Re: Starting it all over
- From: Martin Stephenson <mwstephenson@xxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Sat, 20 Nov 2004 09:30:10 +1100 (EST)
Greg,
You may want to take the time to look at the physical aspects of your
Datacentre while your at it.
The last place I had worked had insufficient UPS and A/C, and these are two
things that you need
to increase as you continue to jam in more high powered servers in a room.
If your in an Earthquake zone you may also consider getting some base isolation
for your racks.
Boeing use a neat solution called ISO-Base which they mount under their racks
and has saved them
in at least one shaker.
As for the systems I think it would be hard to go past Blades for a Citrix
Farm. They have built
in ILO which eliminates KVM requirement. One pair of power (3 phase) outlets
can power an entire
rack of 40 servers, and each chassis of 8 blades can be hooked up with only 4
ethernet (Gb)
cables. Compare this with the rack space and wiring mess you would have with
40 x DL380's.
The one thing we should have ordered with our HP BL20p's was the battery pack
for the cache so we
could turn on Write Back caching.
For small scale servers including test and staging servers definitely consider
using VMWare ESX,
which we have had gr8 success with. If you connect your VMWare servers to a
SAN you can use the
amazing VMotion solution to migrate servers in realtime from one Physical host
to another.
If you have to look at Disaster Recovery solutions to a remote DataCenter, I'd
now only consider
basing this on SAN to SAN replication strategies. Due to budget restrictions
this approach was
not available to me and I had to look at cheaper solutions, like Double-Take.
It would be a cold
day in Hell before I went back to Double-Take.
Cheers,
Martin.
--- Greg Reese <gareese@xxxxxxxxx> wrote:
> If you had to throw out your entire server setup and start over, would
> you do differently a second time around.
>
> We have undergone recent changes here and I pretty much get to do that
> after the first of the year. Exchange, SQL, Firewall, Citrix, Windows
> servers, the whole entire datacenter - gone. It all has to be redone
> from scratch and it has to be done with an eye on future growth.
>
> I was thinking of moving it all to blades that boot from a SAN. It's
> all standalone servers now.
>
> I'm just curious what the rest of you have run into that you wish you
> could do differently if given the chance.
>
> Greg
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