Please help with Simon's Cyrus RPMS (2.2.8), SMP, and really slow performance

[Simon Matter]

> Here are the bonnie results...

Hm, this is bonnie 1.x, which is okay, but it has 2Gb filesize limit. Your
big box has 2Gb of Ram, right? How big was your file size with bonnie? To
make this test work, boot both boxes with mem=128M as kernel parameter so
it will only use 128M of the memory. Then, run the bonnie with 'bonnie -s
1000' so the whole file will not fit in RAM!

> This is the "beefy" machine
>
>               -------Sequential Output-------- ---Sequential Input--
> --Random--
>               -Per Char- --Block--- -Rewrite-- -Per Char- --Block---
> --Seeks---
> Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  /sec
> %CPU
>           100 12991 100.0 105984 99.4 13171  8.2 15454 99.8 536628 99.6
> 480.1  2.5
>
>
>
> This is the puny machine:
>
>
>               -------Sequential Output-------- ---Sequential Input--
> --Random--
>               -Per Char- --Block--- -Rewrite-- -Per Char- --Block---
> --Seeks---
> Machine    MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  /sec
> %CPU
>           100  6021 98.1 91309 25.9  4779  1.0  6176 99.5 1457838 99.7
> 50186.3 62.7
>
>
>
>
>
>
>
>> Hm, you said SCSI Raid - that can mean alot.
>> Could you run a good old bonnie on both boxes and compare the numbers?
>> One thing that comes to mind when I hear such things is a system with
>> disk write cache disabled. Now, if you have a raid controller without
>> battery backed cache, your vendor will hopefully disable write cache on
>> the controller and also disable WCE bit on the drives. That way it will
>> perform very poorly but be as secure as possible.
>>
>> Simon
>>
>
>


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