Solved

Moving VM's pagefile to spindle HDD

Posted on 2014-03-07
2
323 Views
Last Modified: 2014-03-17
Looking to convert low-use and non-critical servers, about 13 in all, from physical to a two-node clustered virtual host.  

Some servers are small SQL servers, writing about 2-4GB of data a day.  Some SQL servers are x86, so a 4GB limitation (due to running old software we intend to upgrade to 64-bit versions next year).  Other servers are 64-bit with 16GB RAM.

Since SSD's are starting to get into reasonable price range, I would like to put all 13 on to several SSD's.  I keep reading that it is highly recommended that the pagefiles for each server be put into separate vhd file and placed onto a separate spindle drive to save on wear to the SSDs.

This is a very small virtualization project for a small business.  Sadly, there is no existing large scale virtual datacenter we could just pull these into.

So my question is, would two 300GB 15K SAS drives in RAID 1 be more than enough (performance-wise) to handle the pagefile vhd's for all 13 servers?  Should I go with four in a RAID 10 instead?  Two sets of RAID 1?  Or am I going about this the wrong way?
0
Comment
Question by:3Discovery
2 Comments
 
LVL 56

Expert Comment

by:Cliff Galiher
ID: 39913438
Putting 13 swap files on what is effectively one spindle (raid 1 with 2 disks essentially performs at the speed of only one disk) will almost certainly leave that disk set I/O constrained. You'd be better off more slower disks.
0
 
LVL 16

Accepted Solution

by:
Gerald Connolly earned 500 total points
ID: 39917158
on what is effectively one spindle (raid 1 with 2 disks essentially performs at the speed of only one disk
What? Physical Disk = spindle, so RAID-1 with 2xDisk/Spindle only has a 2x Write overhead (RAID-5 = 4x), but does have a 2x Read Speed if using a proper RAID controller or in software - Don't use the Fake-RAID controllers that are on most Mobo's today.

A 15K SAS disk probably does 2xIOPS of a 7200 disk so a 4 Spindle RAID10 should be fine.
0

Featured Post

Free Gift Card with Acronis Backup Purchase!

Backup any data in any location: local and remote systems, physical and virtual servers, private and public clouds, Macs and PCs, tablets and mobile devices, & more! For limited time only, buy any Acronis backup products and get a FREE Amazon/Best Buy gift card worth up to $200!

Join & Write a Comment

David Varnum recently wrote up his impressions of PRTG, based on a presentation by my colleague Christian at Tech Field Day at VMworld in Barcelona. Thanks David, for your detailed and honest evaluation!
A procedure for exporting installed hotfix details of remote computers using powershell
In this Micro Tutorial viewers will learn how to restore their server from Bare Metal Backup image created with Windows Server Backup feature. As an example Windows 2012R2 is used.
This tutorial will walk an individual through the process of configuring their Windows Server 2012 domain controller to synchronize its time with a trusted, external resource. Use Google, Bing, or other preferred search engine to locate trusted NTP …

743 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

12 Experts available now in Live!

Get 1:1 Help Now