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Extended RAC: ASM vs VPLEX
Hi gurus
I'm looking for a comparison or some material about VPLEX vs ASM in a Extended RAC scenario.
I have a customer that are using an Extended RAC with ASM but I'd like to present the benefits to build the same environment with VPLEX.
Have somebody already worked in a similar case?
Thank you.
Anonymous
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February 27th, 2012 19:00
Hi Bruno,
Have you ever tried this one on powerlink (Customer Technical Presentation: EMC VPLEX Family Technical Review):
http://powerlink.emc.com/km/live1/en_US/Offering_Technical/Presentation/VPLEX-Tech.pptx?mtcs=ZXZlbnRUeXBlPUttQ2xpY2tDb250ZW50RXZlbnQsZG9jdW1lbnRJZD0wOTAxNDA2NjgwNjIzNDlmLGRvY3VtZW50VHlwZT1wcHR4LG5hdmVOb2RlPTBiMDE0MDY2ODA0ZGEyMGVfR3JpZA__?
Please go to page 15 of the presention for detail.
Wish you good selling.
Jean
Jingyi1
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February 27th, 2012 23:00
Bruno,
VPLEX+ASM is the EMC recommended approach for extended RAC. you can read the following White Paper for more information. http://powerlink.emc.com/km/live1/en_US/Offering_Technical/White_Paper/h8930-vplex-metro-oracle-rac-wp.pdf?mtcs=ZXZlbnRUeXBlPUttQ2xpY2tTZWFyY2hSZXN1bHRzRXZlbnQsZG9jdW1lbnRJZD0wOTAxNDA2NjgwNWZkMWRkLGRhdGFTb3VyY2U9RENUTV9lbl9VU18w
VPLEX has huge advantage especially on cross-site RAC configuration. Cross site HA software/hardware has to be used along with ASM in extended RAC 11g R2 environment.
Anonymous
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February 28th, 2012 05:00
Hi,
the Oracle recommendation is this:
http://docs.oracle.com/cd/B28359_01/server.111/b28282/configbp005.htm
this doc explained how to create a extended RAC only with Oracle features (basically with ASM).
but, what I want is show how VPLEX can create a better environment than this.
I want to prepare a PPT (pros and cons) comparing an extended RAC only with ASM and without VPLEX and an extended RAC with ASM and VPLEX.
for example:
- No host CPU cycles consumed on mirroring with VPLEX.
Have somebody more ideas about pros and cons?
Thanks in advance.
Anonymous
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February 28th, 2012 17:00
Hi Runo,
Pros and Cons for "No host CPU cycles consumed on mirroring with VPLEX" is: VPLEX is host-independent, so it does not consume CPU cycles.
And for the same reason, other benefits/advantages showed on page 15 of that customer-ready presentation (as I mentioned earlier) include:
Hope these pieces of information help.
Best Regards,
Jean
BartS
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April 2nd, 2012 03:00
Copy/Pasted from my blogpost....
So what are the advantages, from a business perspective?
Disadvantages? Probably. Here are the objections I expect from my customers:
By the way, what is the business value of risk reduction?
Anonymous
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April 2nd, 2012 04:00
Several things to talk about here....
Challenges with ASM mirroring
1) Host Mirroring Consumes Valuable CPU cycles that often translates in requiring more CPUs and more Oracle licence cost
2) Admins need to configure failure groups, path preferences and other ASM mirroring functions
3) Cross connect between SANs and host become very complex
4) Scaling out is just another added dimension of complexity
4) I think the biggest reason I would adopt the vplex approach opposed to ASM is the solution is not limited to an Oracle database only. It can encompass the entire IT portfolio supporting that specific application. In order to ensure a smooth transition to any availability issues, you need to maintain all the systems consistent and in sync.
In addition, you need to be careful in defining your HA solution since it will mandate a lot of your DR solution.
Oracle best practice recommends that any mirroring should be done on the storage and ASM mirroring should be used when that option is not available. Look into to ASM Technical Best practices document in Oracle support.