« Travelling ... | Main | Being Influential: Mixed Emotions »

May 12, 2008



Very intersting post. I really enjoyed reading it.

hennie grobler

This looks like really cool stuff.
1) For 100% uptime SRM will have to have the built-in ability to ensure end-to-end commit management. This will entail intelligent interaction between the business application software, the database system and SRM - is this already possible/in place for the apps you mentioned?
2) I assume user sessions are not an issue?

Chuck Hollis

I think I have answers to this:

1) The "end to end commit management" is not provided by SRM per se, rather it's provided by the underlying replication technology that ensures consistency of multiple transactional databases.

In storage lingo this is called "consistency groups" or "federated databases". Many EMC replication products have supported this notion for a while, and it does work with SRM, although the management constructs may not be 100% integrated at this time.

2) As I understand things, the answer is "it depends". I think in certain scenarios (e.g. web apps) session integrity is maintained. Other user-app protocols may time out and have to be reinitiated.

And now I'm at the absolute limit of my understanding ... :-)

software test consulting

SRM does look promising. You just need to wait for IT managers around the world to join in on the celebration.

Taufik Kurniawan

Dear Chuck,

In conjuction with DRC site with SRM,

What is your suggestion to have a cascaded replication ( multisite DRC ). Can we do mirrorview/s between local and bunker. mirrorview/a between bunker and remote ?

Or Cellera Replication V2 between bunker and remote ?
Or RecoverPoint between bunker and remote ?

Do you any document on the comparison of pros and cons for that ?

BTW, I am a fan also with vmware :-p

Taufik Kurniawan

Chuck Hollis

Hi Taufik

Those are good questions, however I'm not even going to try and answer them in the confines of a blog comment.

Designing and deploying an effictive yet efficient multi-site DRC scheme is a process that takes multiple conversations and deeper expertise than mine.

This is the sort of thing you don't want to get wrong ...

I will offer up one personal observation, though: the vast majority of large-scale multi-site disaster recovery setups out there use EMC's SRDF.

Sorry I can't be more helpful. The best approach would be to either (a) find and download the plethora of relevant reference materials on EMC.com and Powerlink, or (b) contact an EMC or EMC partner DR/BC specialist.

-- Chuck

The comments to this entry are closed.

Chuck Hollis

  • Chuck Hollis
    SVP, Oracle Converged Infrastructure Systems

    Chuck now works for Oracle, and is now deeply embroiled in IT infrastructure.

    Previously, he was with VMware for 2 years, and EMC for 18 years before that, most of them great.

    He enjoys speaking to customer and industry audiences about a variety of technology topics, and -- of course -- enjoys blogging.

    Chuck lives in Vero Beach, FL with his wife and four dogs when he's not traveling. In his spare time, Chuck is working on his second career as an aging rock musician.

    Warning: do not ever buy him a drink when there is a piano nearby.

    Note: these are my personal views, and aren't reviewed or approved by my employer.
Enter your Email:
Preview | Powered by FeedBlitz

General Housekeeping

  • Frequency of Updates
    I try and write something new 1-2 times per week; less if I'm travelling, more if I'm in the office. Hopefully you'll find the frequency about right!
  • Comments and Feedback
    All courteous comments welcome. TypePad occasionally puts comments into the spam folder, but I'll fish them out. Thanks!