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Ashwi
2 Iron

Enterprise Fast Drives - Would Raid level make a performance difference

Q:

I have 16 EFDs.

Would my configuring them in Raid 10 give me a better performance than Raid 5.

Kindly advice.

Regards.

Ragh

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7 Replies
AnkitMehta
4 Beryllium

Re: Enterprise Fast Drives - Would Raid level make a performance difference

Performance is dependant on many factors.

In General,  RAID 1+0 has Good R/W Performance and RAID 5 has Good Read Performance for sequential reads and fair for random and sequentials writes, also do not forget Write Penalty is High in RAID 5 as compared to RAID 1+0.

For Further information you may refer to below white papers:

EMC FAST Cache - A Detailed Review.

White Paper: EMC Unified Storage Best Practices for Performance and Availability: Common Platform an...

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RRR
5 Osmium

Re: Enterprise Fast Drives - Would Raid level make a performance difference

Oh EFD means Enterprise Flash Drive, not FAST.

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AnkitMehta
4 Beryllium

Re: Enterprise Fast Drives - Would Raid level make a performance difference

I am aware Rob! It's just I threw in one more document, in case he is interested in configuring EFD's for FAST

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dynamox
6 Thallium

Re: Enterprise Fast Drives - Would Raid level make a performance difference

considering how expensive EFDs are , we try to squeeze as much usable capacity as possible so we go with the RAID config that gives us just that.  Write penalty will be offset by pretty much non existent seek time on EFDs and just its superior IOPS.

RRR
5 Osmium

Re: Enterprise Fast Drives - Would Raid level make a performance difference

I wasn't replying to you, was I? No offense ofcourse.

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AnkitMehta
4 Beryllium

Re: Enterprise Fast Drives - Would Raid level make a performance difference

I don't see he mentioned EFD and FAST on the question but I do see that in my response! :S

Anyways, no biggy!

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RFritz11
3 Zinc

Re: Enterprise Fast Drives - Would Raid level make a performance difference

Hi,

I've moved this post to the Host Systems support forum where it can be further discussed.

Thanks.

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