[CentOS] Re: 3Ware 9500 vs 9550 vs CentOS 4.latest kernel

Thu Aug 24 20:05:25 UTC 2006
Troy Engel <tengel at fluid.com>

Scott Silva wrote:
>>>   
>> I wonder if you guys might have different firmware revs.

Or my machine could have just been having a hissy fit, on soft reboot. 
Things go awry with tech all the time, not worth worrying about. :)

>> The 9550 allegedly has better performance for RAID5 so I'm hoping those
>> work out OK.
>>
> I had to use the 9500's because of the servers they were put in. They are too
> old for PCI-X.

...and mine has been around for awhile, a 9550 that fit the bill wasn't 
a reality. I would love the better performance, but this is just a 
backup-to-disk machine so it can take all night/day for what I care.

Here are two sample stat numbers out of Arkeia NetBackup that are from 
last night. First, tons and tons of small files, so lots of network 
overhead and whatnot:

"879073" files, "1045" MB, compressed at "1.3", "4008" seconds, "15" MB/mn

Then a few very large files, so it's all streaming and writing to disk 
in a continuous flow over a single 100mbit link:

"5" files, "7333" MB, compressed at "2.0", "368" seconds, "1195" MB/mn

-te

-- 
Troy Engel | Systems Engineer
Fluid, Inc | http://www.fluid.com