I realize that the reader doesn't have all of the info for my situation, and
that there are ways to verify true bottlenecks in a databaes system with
Perf Mon and other tools that I will address when I can. That said, I'm
hoping that others can share their experiences if they've been down this
path. Here is my situation:

I have one DB server that will host my main site DB and the CFSessions DB
that is created by the CF Servers to use database-based client variables. I
would like to maximize performance of the database but I am unsure as to the
best starting point for allocating hard drives to raid volumes. Client
variables get moderate usage, although the data contained within is not
mission critical. The MainDB gets relatively heavy usage, mostly reads. The
system looks like this:

SQL Server 2000
10 drive raid
system memory maxed out
Fast CPUs

The database files look like this:

Main DB
Main DB Translog
CF Sessions DB
CF Sessions DB Tlog

What RAID config would you use for the databases?

Main DB = 4+1 parity RAID 5
Main DB tlog = 1+1 mirrored RAID 1
CF Sessions DB = 1
CF Sessions DB tlog = 1
Hot spare = 1

or splitting the drives based on sequential vs non-sequential reads:

Main DB and CFSessions DB = 6+1 parity RAID 5
Main DB tlog CF Sessions DB tlog = 1+1 mirrored RAID 1
Hot spare = 1

or something else??

How important is (battery backed) write cache for the raid? The main
database doesn't write very much, but the CFSessions DB should be writing
every pageload. Would you use this?

Thanks very much in advance,
Matt


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