Re: asm on san

joel garry wrote:

>> To consider yourselves consumers of the SAN service is the same as
>> considering yourself a consumer of the network service or the
>> electricity service. As the customer you have both the right and
>> the responsibility to write an SLA with those that provide it.

Ok bad analogy.

>> If your idea of an SLA is to laydown in the middle of the street
>> and be run over that's what you get. I think you will find that
>> the customers of your company's ERP system has taken a very
>> different approach to the issue and so should all DBAs.

What I am saying DBAs should do is write an SLA with network admins saying I need X number of private networks (storage,cache fusion) with Y bandwidth and latency, etc. And with the storage admins write an SLA saying I need Z TB of disk providing specific service metrics. Then, as long as they deliver them, who cares. But simple math will force them, if they do so, to carve up multiple LUNS, stripe multiple disks, and not use RAID5 because otherwise it won't work.

A DBA that says give me 500GB of disk is a fool. What is provided may be 500GB on a single 750GB SATA drive. DBAs need to be smarter about what they ask for and include in their requests service metrics ... in other words write an SLA.

-- 
Daniel A. Morgan
Oracle Ace Director & Instructor
University of Washington
damorgan_at_x.washington.edu (replace x with u to respond)
Puget Sound Oracle Users Group
www.psoug.org