Solved

Performance gain when adding drives to Raid 5?

Posted on 2003-12-10
1
274 Views
Last Modified: 2013-12-16
I am looking for any benchmark data regarding i/o performance gains when adding more drives to a raid 5 array. I see lots of comments that performance will increase, but looking for some idea of what to expect , ie if I double the drives will I double the i/o (assuming no bottlenecks elsewhere).
0
Comment
Question by:medent
1 Comment
 
LVL 2

Accepted Solution

by:
zdes earned 500 total points
ID: 9947562
Not necesserily. Your controller can get saturated. Then you get less than two-fold. Or you already have sufficient performance, and you will get no gain, because your system is not disk I/O bound. Or you keep the same amount of data, but spread it evently across two RAID 5 devices so that the data ends up being on more dense tracks. Then you can get more than 2-fold gain.

There was a nice book about general performance configuration by SunPress (Yeah, I know that it is a linux question :-)  Brian Wong "Configuration and Capacity Planning for Solaris Servers". Good read. It will also help you to know exactly what you are looking for.

If you are after performance, and ready to double disks, RAID-5 is not the best option - striping with mirroring would be better.
0

Featured Post

Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

Question has a verified solution.

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

Suggested Solutions

In this tutorial I will explain how to make squid prevent malwares in five easy steps: Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-…
The purpose of this article is to demonstrate how we can use conditional statements using Python.
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

948 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