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How to confirm duplication jobs are optimized?

Hello,

We are running a NB 6.5.6 environment, and have 2 DataDomain 880s, each in geographically distinct locale, under one NB domain. We are using OST (2.2) and DD Boost (4.9), and I've been reading about optimized duplication. Is there a way to differentiate optimized duplication jobs from regular dupes?

 

Thanks

1 Solution

Accepted Solutions
Accepted Solution!

Opt-Dup vs. non Opt-Dup

I have similar backup infrastructure as yours, and we do Opt-Dup for some backup replication from one site to another.

If it's Opt-Dup, the duplication of backup images are processed by the storage appliances (such as DD).  There are two benefits: 1. Your NBU servers are kind of 'freed" from the hard work of copying the backup images. 2. The two DD's talk to each other and only copy the unique chunks of blocks that the target DD doesn't already have.  Therefore it requires less network bandwidth utilization and is "Optimized". 

You will see such line in the duplication job's status/details:

09/25/2011 21:57:10 - Info Duplicate (pid=14193) Initiating optimized duplication from @aaaaG to @aaaaC

Here you can see the phrase "optimized duplication" and you can see the copying of backup image from one DD disk pool to another DD disk pool.

While the duplication job is running, you can log on the DD's console and run these commands to check the Opt-Dup job performance and statistics:

# ost opt-dup show performance

#  ost opt-dup show stats

 

If it's not Opt-Dup, the duplication of backup images are processed by the NBU Media server.  In such case your source and destination DD do not talk to each other, and all the backup image replication is reconstructed by DD (from deduped/compressed to original) and read by NBU Media server and write to another DD (then dedupe/compress again).  You won't see the "optimized duplication" phrase in the details of that duplication job, and you would only see resource request/grant and bpdm or bptm processes running on the NBU Media server for that duplication job.

View solution in original post

3 Replies

You could look at the column

You could look at the column "Deduplication Rate" in activity monitor or if you look in the detailed status for a job there is some dedupe percentages there.

Accepted Solution!

Opt-Dup vs. non Opt-Dup

I have similar backup infrastructure as yours, and we do Opt-Dup for some backup replication from one site to another.

If it's Opt-Dup, the duplication of backup images are processed by the storage appliances (such as DD).  There are two benefits: 1. Your NBU servers are kind of 'freed" from the hard work of copying the backup images. 2. The two DD's talk to each other and only copy the unique chunks of blocks that the target DD doesn't already have.  Therefore it requires less network bandwidth utilization and is "Optimized". 

You will see such line in the duplication job's status/details:

09/25/2011 21:57:10 - Info Duplicate (pid=14193) Initiating optimized duplication from @aaaaG to @aaaaC

Here you can see the phrase "optimized duplication" and you can see the copying of backup image from one DD disk pool to another DD disk pool.

While the duplication job is running, you can log on the DD's console and run these commands to check the Opt-Dup job performance and statistics:

# ost opt-dup show performance

#  ost opt-dup show stats

 

If it's not Opt-Dup, the duplication of backup images are processed by the NBU Media server.  In such case your source and destination DD do not talk to each other, and all the backup image replication is reconstructed by DD (from deduped/compressed to original) and read by NBU Media server and write to another DD (then dedupe/compress again).  You won't see the "optimized duplication" phrase in the details of that duplication job, and you would only see resource request/grant and bpdm or bptm processes running on the NBU Media server for that duplication job.

View solution in original post

Thanks

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