Hi,
Thanks for all.
Due to diversity of applications that this servers will be used for, and
the hungry for more available space, we'll be using RAID 3/5.
Basically 70% of this space will be used for user accounts and some to
serve small applications. I've being used HS, RAIDS and Clusters for a
long time and a doubt that I have since begining is about performance of
RAID 3/5 Partitioning. So, the basic question would be - Not
considering space lost for parity, don't I notice a poor performance on
units driven by RAID Partitioning instead of a single unit of a whole
RAID ?
Thanks:
Tom Webster and info about SANTK.
Edward Murphy
John Tan
Jim Jones
Don Rye
and Alan for depth considerations.
Wander
==============================================================================================
Wanderley Mendes wrote:
> Hi,
>
> We're going to configure a SAN with 6 Servers, 2 x MA8000 with 16 x
> 36.4 GB disks each and 2 x 8-ports Fiber Switch.
> While trying to setup the best trade-off between loosing disks due to
> distributed parity of RAID 3/5 and performance, I have at least the
> following two options:
>
> 4 x RAID 3/5 of 5 Disks
> 2 x RAID 3/5 of 6 Disks
> 8 RAID Partitions for each Raidset
> 48 Units,
> 1 complete Raidset with 8 units for each server
> Lost: 6 x 36.4 GB
>
> Or
>
> 4 x RAID 3/5 of 8 Disks
> 8 RAID Partitions for each Raidset
> 32 Units, 5 units/server
> 2 servers with 6 units
> Lost: 4 x 36.4 GB
>
> In terms of performance, does anyone see a good reason to choose the
> first option ?
>
> Thanks
>
>
> Wander
>
> --
> ----------------------=======----------------------
> Wanderley O. Mendes
> Software Specialist wander_at_cptec.inpe.br
> Phone: +55-12-560-8432 Fax: +55-12-560-8435
> INPE/CPTEC - Cachoeira Paulista - Sao Paulo - Brazil
> ----------------------=======----------------------
>
>
--
----------------------=======----------------------
Wanderley O. Mendes
Software Specialist wander_at_cptec.inpe.br
Phone: +55-12-560-8432 Fax: +55-12-560-8435
INPE/CPTEC - Cachoeira Paulista - Sao Paulo - Brazil
----------------------=======----------------------
Received on Tue Mar 13 2001 - 18:03:25 NZDT