Hello Jochen,

Wednesday, December 13, 2006, 10:35:22 PM, you wrote:

JMK> Robert,

>> It's not that bad with CPU usage.
>> For example with RAID-Z2 while doing scrub I get
>> something like
>> 800MB/s read from disks (550-600MB/s from zpool
>> iostat perspective)
>> and all four cores are mostly consumed - I get
>> something like 10% idle
>> on each cpu.
JMK> ===

JMK> But in the end this would leave us which too few cpu cycles for the
JMK> database backend. Some of the queries are rather complex and fairly
JMK> cpu intensive (completly saturating a v440 box cpu-wise).
JMK> I'd say going x4600 plus attached storage will probably suit us more,
JMK> especially when the number of users on the warehouse does increase.

Well, this is with RAID-Z2 and it's expected to consume more CPU.
If you go with RAID-10 CPU usage should be much lower - however I
don't remember exact numbers (I was interested on x4500 mostly in file
serving).

JMK> Nevertheless many thanks for your input - I really enjoy your blog.

Nice to hear you like it.


-- 
Best regards,
 Robert                            mailto:[EMAIL PROTECTED]
                                       http://milek.blogspot.com

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