...and on Mon, Jan 03, 2005 at 03:44:44PM -0500, Mitch Pirtle used the keyboard:
>
> You are right, I now remember that setup was originally called "RAID
> 10 plus 1", and I believe is was an incorrect statement from an
> overzealous salesman ;-)
>
Just an afterthought - that could well be the unf
You are right, I now remember that setup was originally called "RAID
10 plus 1", and I believe is was an incorrect statement from an
overzealous salesman ;-)
Thanks for the clarification!
- Mitch
On Mon, 03 Jan 2005 15:19:04 -0500, Madison Kelly <[EMAIL PROTECTED]> wrote:
> Madison Kelly wrote:
Madison Kelly <[EMAIL PROTECTED]> writes:
> Without it, specially in a failure state, the performance can collapse as
> the CPU performs all that extra math.
It's really not the math that makes raid 5 hurt. It's that in order to
calculate the checksum block the raid controller needs to read in t
Madison Kelly wrote:
Nope, Raid 10 (one zero) is a mirror is stripes, no parity. with r10
Woops, that should be "mirror of stripes".
By the way, what you are thinking of is possible, it would be 51 (five
one; a raid 5 built on mirrors) or 15 (a mirror of raid 5 arrays).
Always be careful, 10 a
Mitch Pirtle wrote:
On Mon, 13 Dec 2004 09:23:13 -0800, Joshua D. Drake
<[EMAIL PROTECTED]> wrote:
RAID 10 will typically always outperform RAID 5 with the same HD config.
Isn't RAID10 just RAID5 mirrored? How does that speed up performance?
Or am I missing something?
-- Mitch
Hi Mitch,
Nope,
On Mon, 13 Dec 2004 09:23:13 -0800, Joshua D. Drake
<[EMAIL PROTECTED]> wrote:
>
> RAID 10 will typically always outperform RAID 5 with the same HD config.
Isn't RAID10 just RAID5 mirrored? How does that speed up performance?
Or am I missing something?
-- Mitch
---(end
Joshua D. Drake wrote:
An Opteron, properly tuned with PostgreSQL will always beat a Xeon
in terms of raw cpu.
RAID 10 will typically always outperform RAID 5 with the same HD config.
Fibre channel in general will always beat a normal (especially an LSI)
raid.
Dell's suck for PostgreSQL.
Does any
However, I keep getting conflicting advice. My choices are along
these lines:
Dual Xeon 64bit with built-in 6-disk RAID10 or RAID5 (LSI RAID card)
Dual Opteron 64bit with built-in 6-disk RAID10 or RAID5 (LSI RAID card)
Dual Opteron 64bit with external RAID via fibre channel (eg, nstor)
An Opteron
Vivek,
> Dual Xeon 64bit with built-in 6-disk RAID10 or RAID5 (LSI RAID card)
> Dual Opteron 64bit with built-in 6-disk RAID10 or RAID5 (LSI RAID card)
> Dual Opteron 64bit with external RAID via fibre channel (eg, nstor)
Opteron over Xeon, no question.Not only are the Opterons
real-world-fa
> "BS" == Bo Stewart <[EMAIL PROTECTED]> writes:
BS> The servers listed above are the dell 2650's which have perc 3
BS> controllers. I have seen on this list where they are know for not
BS> performing well. So any suggestions for an attached scsi device would
BS> be greatly appreciated. Als
Bo,
> 2 - 2.4 Ghz Xeon processors
> 4GB ram
> 4 36gb 1rpm scsi drives configured for raid 10
Hopefully you've turned OFF hyperthreading?
> gains can I expect on average from swapping from 4 disk raid 10 to 14 disk
> raid 10? Could I expect to see 40 - 50% better throughput.
This is so depe
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