Re: Upgrading VMS Cluster to DS10 or ES40

From: Mike Naime (mnaime_at_kc.rr.com)
Date: 08/13/03 

Date: Wed, 13 Aug 2003 04:06:15 GMT

>Grealy, Patrick <PGrealy@sph.uth.tmc.edu> wrote in message
news:40B30BA5E139F648B2EA60E6AE3A7B2601CCA278@sphnt3.sph.uth.tmc.edu...
>Our current cluster is DEC7610 + DEC2100 + HSJ40/StorageWorks. We're
considering the cheapest way to migrate to 21st century and maintain the
>redundancy of the cluster. Any suggestions considering DS10 vs. ES40? -
Thanks.

1.) How much memory do you want to install into the box?
2.) How many internal PCI cards do you need to install?
3.) Are you installing internal storage? Or is it all the external HSJ's.

DS10:
One CPU. Thats it! No room for expansion here.
Only 4 PCSI slots. This may not be a problem for you.
2 built in internal 10-100 network ports. (WE0, WE1) If you do not need
more than this, this is a plus.
You can only put 2GB in the DS10.
Space for a couple of internal drives.
ONLY ONE POWER CORD. SINGLE POINT OF FAILURE!

The ES40 has more room for later expansion than you do in the DS10.
10 PCSI slots on 2 PCSI buses.
Up to 4 CPU's. You do not need to buy all of them at the same time.
Space for 2 internal drive cages.
You can install up to 32GB of memory into the ES40 if you have all 3 power
supplies installed.
3 power supplies allows for redundant power feeds.

An ES40 with 4 CPU's and 8GB of memory CAN run on only one power supply.
(No internal disk drives) I have had at least 3 power supply failures in
the last 2 years in my ES4x servers. We were able to hot swap/replace with
no downtime!

I would recommend the ES40 over the DS10. Even if you bought the same
amount of memory and CPU. With the ES40, you could add CPU/RAM next year
without having to buy a totally new box.

Check Ebay!
$ 9K for -- CPU: 4x667mhz Memory: 1GB RAM Disk: 4x9.1GB HD
OR a 1CPU 833Mhz w 1GB ram for $11.5K
you might find that used ES40 cheaper than you think.

Note: if your processes are I/O hogs, consider fibre channel storage, that
will really boost your I/O throughput more than a bigger box will!

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