Solved

is sql database location as important now when using virtual servers and smart san arrays

Posted on 2014-04-03
4
253 Views
Last Modified: 2014-04-08
is it still important to locate tempdb data files log files etc all on seperate drives?
when using a virtual server with smart arrays like emc vnx5600 etc
as the lun is treated as one big disk
and emc smart array moved data to faster disks anyone
does it really matter anymore
0
Comment
Question by:dougdog
4 Comments
 
LVL 52

Assisted Solution

by:Carl Tawn
Carl Tawn earned 125 total points
ID: 39975211
If you are dumping all of your data onto a SAN then no, not really, from a performance perspective at least. Even when using a SAN though I would still tend to split the database across LUNs for manageability more than anything.
0
 
LVL 5

Assisted Solution

by:Steve M
Steve M earned 125 total points
ID: 39975240
Not really no - the only reason I would think on a SAN is if you have LUN sizing that is a bit restrictive, in that case you'll want to separate them so logs don't fill up your DB LUN, and also temp DB can grow quite large with heavy transactions during application upgrades etc, so sometimes it will need lots of temp room to grow.  Performance wise though, no difference.
0
 
LVL 118

Assisted Solution

by:Andrew Hancock (VMware vExpert / EE MVE)
Andrew Hancock (VMware vExpert / EE MVE) earned 125 total points
ID: 39975274
If all your LUNs are cut from the same spindles (SAN), performance will be the same.
0
 
LVL 69

Accepted Solution

by:
ScottPletcher earned 125 total points
ID: 39975770
Not nearly as critical to performance anymore.

But, I think even then you can still do two (or more, if you wanted) separate raid sets.  And I strongly recommend that for SQL Server, for at least two reasons:

1) Recoverability -- critical.  For any given db, if the logs are on a different raid set than the data, you have full recoverability at all times (unless, of course, both raid sets fail at the same time, which is statistically virtually impossible).

2) Performance -- RAID 10 generally works better for log files, which are 90+% write.  RAID 5/6 generally works better for data.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article will show you how to create an ISO CD-ROM/DVD-ROM image (*.iso), and MD5 checksum signature, for use with VMware vSphere Hypervisor 6.5 (ESXi 6.5). It's a good idea to compare checksums, because many installations fail because of a corr…
This article shows gives you an overview on SQL Server 2016 row level security. You will also get to know the usages of row-level-security and how it works
Viewers will learn how the fundamental information of how to create a table.
Viewers will learn how to use the SELECT statement in SQL and will be exposed to the many uses the SELECT statement has.

914 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

22 Experts available now in Live!

Get 1:1 Help Now