SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


The Year 2013


The Year 2013

Author
Message
cdonlan 18448
cdonlan 18448
Valued Member
Valued Member (55 reputation)Valued Member (55 reputation)Valued Member (55 reputation)Valued Member (55 reputation)Valued Member (55 reputation)Valued Member (55 reputation)Valued Member (55 reputation)Valued Member (55 reputation)

Group: General Forum Members
Points: 55 Visits: 283
Chris Harshman (1/2/2013)
I think part of the problem with SAN pools is the inherent disconnect between how network guys setup disk arrays and luns on these devices and how database people want to use them. The more I've learned about our SAN setup at my current company the less I wish I knew. Network guys seem to like making a few RAID arrays that are ginormous and then carve them out into what will be many "drives" that the OS sees. Of course with the same array serving multiple purposes for the same or multiple servers there's going to be odd contention and sub-optimal configuration. I had a network guy tell me that our RAID 10 arrays were only using 2 physical disk drives, at which I just walked away rubbing my forehead in disbelief.


I spent an absurd amount of time my first year at my current employer trying to convince the guys on the SAN/Network team that they were causing all kinds of I/O problems. "What? The SAN can handle anything, the sales guy said so...". Fortunately, we have more effective management in this department now. In the new world order of SAN admins and DBA's, I think the SAN/Network people need some theoretical education on concurrency. BTW, Brent Ozar has a lot first-rate advice on this subject.
Steve Jones
Steve Jones
SSC Guru
SSC Guru (61K reputation)SSC Guru (61K reputation)SSC Guru (61K reputation)SSC Guru (61K reputation)SSC Guru (61K reputation)SSC Guru (61K reputation)SSC Guru (61K reputation)SSC Guru (61K reputation)

Group: Administrators
Points: 61937 Visits: 19100
That's why I think we'll see databases move off SANs. The salespeople and vendors say "put it all on all disks", which causes problems. SAN people are trained in a week, crammed in a bunch of information and they don't study their devices as a career, they manage storage.

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search