RE: Linux for Big(ish) Databases

2002-03-07 Thread James Morle

Bill,

In general terms, I would say that it is certainly suitable. That answer
is based upon the information you provide below. The real answer could
only be ascertained by evaluating other requirements:
A) Availability
B) Scalability
C) 'Cost' of each user - what do the transactions look like

Don't fall into the trap of treating the machine as a PC - many
implementations of Linux/Oracle apply the cost-reduced approach all the
way across the system. You save money on the server and OS, but you
should still make sure your I/O requirements are well catered for. 
From a CPU standpoint, you are probably more than OK. A quad Xeon
machine has more power than you need in all likelihood (again,
APPLICATION DEPENDENT - a single user can suck down 4 Xeons if they want
to...). Memory, no problem - 4GB should be more than enough, and Linux
is pretty well proven up to this level. 
The big downsides are thus:
A) PCI bus bandwidth. Unless you go for a system with multiple PCI buses
(they are available, but I've not personally run Linux on one of these),
you are limited to a maximum theoretical bandwidth of width*clock: 33MHz
* 32-bit= ~132MB/s, 66MHz*64-bit= 528MB/s. 
B) Crash Dumps. If you hit an OS problem, who do you go to, and what do
you give them?
C) Memory bandwidth. RDRAM or at least DDR memory solutions should be
used where possible. This is where the P4 is actually worth considering.
Forget all the 'extensions' stuff, though - Oracle is pretty much a pure
INTEGER compute load. The thing you get that's worth having with the P4
is 400MHz front side bus - Memory Bandwidth!

I would recommend, in the complete absence of any real workload
knowledge ( ;-) ) to go for a 2-way P4 system based upon the ServerWorks
GC-HE chipset. Something like the Dell PowerEdge 4600. This will give
you a) memory bandwidth more balanced against the CPU power, b) lots of
PCI bandwidth. 
Hope that is of use. 

Regards

James


--
James Morle
Scale Abilities, Ltd
http://www.scaleabilities.co.uk
Author of Scaling Oracle8i - Building Highly Scalable OLTP System
Architectures

 -Original Message-
 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of 
 Bill Buchan
 Sent: 04 March 2002 10:18
 To: Multiple recipients of list ORACLE-L
 Subject: Linux for Big(ish) Databases
 
 
 
 
 
 We've got a new database to put together.  OLTP, 100-200 
 users, ~250Gb 
 data.  We haven't decided on a platform for this yet.  Is 
 Intel/Linux worth 
 considering for this size of thing?
 
 Thanks
 - Bill.
 
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Re: Linux for Big(ish) Databases

2002-03-04 Thread Steven Lembark



 We've got a new database to put together.  OLTP, 100-200 users, ~250Gb
 data.  We haven't decided on a platform for this yet.  Is Intel/Linux
 worth considering for this size of thing?

No reason why not. Might also want to consider linux
on a Sparc or Alpha.



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Workhorse Computing   Chicago, IL 60647
+1 800 762 1582
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RE: Linux for Big(ish) Databases

2002-03-04 Thread Jesse, Rich

The problem with Linux on Sparc or Alpha is that Oracle doesn't have
binaries for them.  I've requested Alpha binaries, but haven't had any
response, despite the 1-2 business days response.  sigh

GL!

Rich Jesse   System/Database Administrator
[EMAIL PROTECTED]  Quad/Tech International, Sussex, WI USA


-Original Message-
Sent: Monday, March 04, 2002 9:53 AM
To: Multiple recipients of list ORACLE-L




 We've got a new database to put together.  OLTP, 100-200 users, ~250Gb
 data.  We haven't decided on a platform for this yet.  Is Intel/Linux
 worth considering for this size of thing?

No reason why not. Might also want to consider linux
on a Sparc or Alpha.
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Jesse, Rich
  INET: [EMAIL PROTECTED]

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RE: Linux for Big(ish) Databases

2002-03-04 Thread Gogala, Mladen

May be they'll release the source code and distribute it under the GPL
license?

 -Original Message-
 From: Jesse, Rich [mailto:[EMAIL PROTECTED]]
 Sent: Monday, March 04, 2002 12:03 PM
 To: Multiple recipients of list ORACLE-L
 Subject: RE: Linux for Big(ish) Databases
 
 
 The problem with Linux on Sparc or Alpha is that Oracle doesn't have
 binaries for them.  I've requested Alpha binaries, but haven't had any
 response, despite the 1-2 business days response.  sigh
 
 GL!
 
 Rich Jesse   System/Database Administrator
 [EMAIL PROTECTED]  Quad/Tech International, 
 Sussex, WI USA
 
 
 -Original Message-
 Sent: Monday, March 04, 2002 9:53 AM
 To: Multiple recipients of list ORACLE-L
 
 
 
 
  We've got a new database to put together.  OLTP, 100-200 
 users, ~250Gb
  data.  We haven't decided on a platform for this yet.  Is 
 Intel/Linux
  worth considering for this size of thing?
 
 No reason why not. Might also want to consider linux
 on a Sparc or Alpha.
 -- 
 Please see the official ORACLE-L FAQ: http://www.orafaq.com
 -- 
 Author: Jesse, Rich
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RE: Linux for Big(ish) Databases

2002-03-04 Thread lembark



-- Jesse, Rich [EMAIL PROTECTED] on 03/04/02 09:03:28 -0800

 The problem with Linux on Sparc or Alpha is that Oracle doesn't have
 binaries for them.  I've requested Alpha binaries, but haven't had any
 response, despite the 1-2 business days response.  sigh

Remember: They're Oracle, you're not. Be glad they take
their precious time to not answer your questions!

The main problem with Intel boxes is a narrow I/O bus and
latency issues with the chipsets. The VIA set tends to be
faster so far as I've seen. Combined with good SCSI boards
and LVM striping you can get decent throughput, but it'll
never match something like a V-box or 6500 for full-bore
speed. The real alpha motherboards (not NT compatable
toys) use wide I/O channels to keep the chip fed.

If you're considering linux look carefully at clusters.
They can be an immense help dealing with large databases.

--
Steven Lembark  2930 W. Palmer
Workhorse Computing  Chicago, IL 60647
   +1 800 762 1582
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Please see the official ORACLE-L FAQ: http://www.orafaq.com
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