CommVault CDR

[Clustor]

I'd like to know what kind of experiences you've had with CDR replication components (Simpana 7.0 versions). I did not have that positive experiences. I've spoken to a few people on CommVault training centers, and they all were like "hmmz. dont use it yet"

The main issue i'm seeing with CDR is that its not stable enough. I've seen several crashes and system hangups, Especially when using application integration (exchange 2007, SQL 2005). File replication seems to be running just fine most of the time.

What issue have you come accross?
Are there good "dos and donts" ?

 

[Calippo]

Main issues I have come across is to do with planning.

Need to provision for dedicated disk for replication logs. Need to understand daily change rate and ensure the replication path has sufficient bandwidth to support the change rate. Then each source volume for replication needs to have sufficient space for Snapshot and the destination needs to support this amount of data plus additional for online snapshots...

If its planned correctly it works correctly!
Only data files are replicated, not the "Application".
Not recommended to replicate System disk.
Not recommended to have replication logs on same volume as data volume.

BooksOnline covers the prerequisits.

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EMCTA & EMCIE - Backup & Recovery
Legato & Commvault Certified Specialist
MCSE

 

[Clustor]

ok thanks. Planning is important.

anyone else got some technical experience with the product?

 

[rodneysmith]

Yep I have implemented it for a number of customers and it all does come down to planning, what you want to replicate and the data pipe size are key to setting it up correctly.

We had customers where it works fine and then they throttle their data connection later on and then their data starts to bank up, make sure when you plan you plan your data pipe as a worst case so that you dont wonder why ur not able to get the data across a pipe when you havent planned for regual traffic eg CIFS,NFS,VOIP and streaming content if these hit you pipe hard then your data will bank up and will eventualy fail (usualy due to disk space)
hope this helps
rgds rod