[Asterisk-Users] RAID affecting X100P performance...

[Joshua McClintock]

Our production environment is using a 4 port 3ware 8500 series card with
2 drives (mirrored) on the pstn (2 t1 cards) machine and an 8 port 3ware
8500 series with 8 drives (raid5) on the pbx/vm machine.

Flawless so far.

On Wed, 2004-07-21 at 16:25, Kevin P. Fleming wrote:
> Scott Laird wrote:
> 
> > That hasn't been my experience at all.  Frankly, I've never seen a cheap 
> > (<$3k) hardware RAID controller that can touch software RAID's 
> > performance on Linux, especially in "challenging" setups, like RAID-5.  
> > Sure, software RAID eats more CPU, but most PCs have CPU to spare these 
> > days.  Would you rather eat 10% of one of your Xeon CPUs to get 200 
> > MB/sec or 100% of an Intel 960 to get 15 MB/sec?
> 
> While this is certainly true, in the context of Asterisk you also have 
> to consider the extra PCI bus usage for all this data going back and 
> forth to the drives while the RAID parity/mirror stuff is being done.
> 
> > In the context of Asterisk, where disk I/O is either logging or 
> > voicemail, buying a 3ware card and a pair of IDE drives seems like a 
> > decent business decision.
> 
> Yep, it works very well.
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