Paul,
Thanks so much. I could not have said it any better.
Cheers,
Gaja
- Paul Drake <paled_at_home.com> wrote:
> thin-wide
>
> RAID 0 volume, 8 drives wide, 8K deep. (2 of these
> mirrored uses 16 drives)
> Stripe depth = 64K - for a multi_block_read_count =
> 8, db_block_size= 8192 -
> a FTS will grab 1 block off of each member in the
> stripe at a time.
>
> thick-narrow
>
> RAID 1 volume, 2 drives, stripe depth 64K, a FTS
> will grab 8 blocks off of 1
> drive at a time.
>
>
> The idea is, deeper, wider tends to improve
> throughput for fewer jobs.
> (SAME)
> Thicker, more narrow, tends to allow for more
> distinct files on dedicated
> volumes (OFA)
>
> The classic tradeoff of (bulk) throughput vs.
> concurrency (few batch jobs
> vs. numerous concurrent users).
>
>
>
>
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L"
> <ORACLE-L_at_fatcity.com>
> Sent: Friday, October 05, 2001 12:55 AM
>
>
>
> EXCERPT :-
> "A scientific comparison needs to be made to
> determine whether it is
> better to create fewer volumes with "thin-wide
> stripes" or more volumes
> with relatively "thicker-narrower" stripes. This is
> dependent on issues
> such as data/index partitioning, required support
> parallelism for core
> operations and any service-level agreements on high
> or partial
> availability. While thin-wide stripes are a very
> attractive solution,
> the constraining factors of parallelism,
> availability and data/index
> partitioning, make it not that appealing. My goal
> is to meet somewhere
> halfway between thin-wide stripes and thick-narrow
> stripes ."
>
> What do you mean by "thin-wide stripes" &
> "thicker-narrower" stripes ?
>
Gaja Krishna Vaidyanatha
Director, Storage Management Products,
Quest Software, Inc.
Co-author - Oracle Performance Tuning 101
http://www.osborne.com/database_erp/0072131454/0072131454.shtml
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Received on Fri Oct 05 2001 - 13:03:13 CDT
