best practices for raid configuration for diff applications.

Question

Gurus,

Is there some kind of a best practise for the way we configure the raid/hyper

for different type of applications.

for e.g we have exchange servers. database servers or applications servers. is there a best practise involved depending on the type of application in question for performance?

Ruel1 · Accepted Answer

In addition, Raid-1/0 will offer much higher performance but at a higher cost.
Comparison between Raid 5 and Raid 1/0
example:
HOST LOAD: 5,200 Random IOPS, 60% Reads
RAID 5
Disk Load = 0.6 * 5,200 + 4 * (0.4 * 5,200)
= 3,120 + 4 * 2,080
= 3,120 + 8,320
= 11,440 IOPS

RAID 1/0

Disk Load = 0.6 * 5,200 + 2 * (0.4 * 5,200)

= 3,120 + 2 * 2,080

= 3,120 + 4,160

= 7,280 IOPS

hth.

Ruel

Quincy561 · Answer

There was a presentation given at EMC World last year that covered some best practices for configuration information. If you work with someone that attended you can download it from the website https://www.emcworldonline.com/2009/scheduler/login.jsp

Otherwise you could get a copy from one of your local EMC SPEED gurus.

ganesh029 · Answer

I am fairly new to the world of emc. I am afraid I dont have access to any of these logins or personalities. Can anyone help me with that:?

Quincy561 · Answer

Maybe this will help some if you have an idea of what your workload profile is.

Performance of reads similar across all protection types

–If you are comparing the same number of drives!

Major difference is with random write performance

–Mirrored: 1 Host Write = 2 Writes

–RAID 5: 1 Host Write = 2 Reads + 2 Writes

–RAID 6: 1 Host Write = 3 Reads + 3 Writes

Cost is also a factor

–RAID 5/6 are best at 12.5% or 25% protection overhead

–RAID 1 has a 50% protection overhead

Protection	Random Write performance	Resiliency
Mirrored	Best	Better
RAID5	Better	Good
RAID6	Good	Best

Symmetrix

best practices for raid configuration for diff applications.

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