Re: [zfs-discuss] Re: Re: Re: Re: concatination & stripe - zfs?

2007-04-26 Thread Louwtjie Burger

There are 3 slots in a V240;

1 x 64bit @ 33/66Mhz
2 x 64bit @ 33Mhz

His suggestion was that you might be saturating the PCI slot, since
their respective throughput (in theory) is 528MB and 264MB.

A 2342 should (again, in theory) do 256MB (per port) ... so slotting
the card into the 33Mhz slots won't help you when you start pushing
data over the second port.

A theory...

On 4/26/07, shay <[EMAIL PROTECTED]> wrote:

>That would surprise me. Can it be that you are saturating the PCI slot
>you 2342 card sits in ? IIRC not every slot on V240 can handle dual port 2342 
card
>going at full rate.

I didn't understand what you mean?
there is only 3 slots on v240, which of them cannot handle dual HBA?

>Generalizations like that fairly often become not true at all. It just depends
>on too many factors.
I know that there are many factors for that, but my preformance test was clear 
, it is much faster to write 20GB on SAN than local disk.


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[zfs-discuss] Re: Re: Re: Re: concatination & stripe - zfs?

2007-04-26 Thread shay
>That would surprise me. Can it be that you are saturating the PCI slot
>you 2342 card sits in ? IIRC not every slot on V240 can handle dual port 2342 
>card
>going at full rate.

I didn't understand what you mean? 
there is only 3 slots on v240, which of them cannot handle dual HBA?

>Generalizations like that fairly often become not true at all. It just depends
>on too many factors.
I know that there are many factors for that, but my preformance test was clear 
, it is much faster to write 20GB on SAN than local disk.
 
 
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