ADSM-L

[ADSM-L] Deduplication

2017-04-10 11:02:34
Subject: [ADSM-L] Deduplication
From: "Loon, Eric van (ITOPT3) - KLM" <Eric-van.Loon AT KLM DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Mon, 10 Apr 2017 14:57:27 +0000
Hi guys!
We are trying to make a fair comparison between server-  and client-side 
deduplication. I'm running into an 'issue' where I notice that once you created 
a backup of a certain set of data, it is always deduplicated 100% afterwards 
when you start a new client-side deduped backup. Even when you delete all 
previous backup on the server first!
So I backed up a directory, retrieved all objectids through a select * from 
backups and deleted all objects, but still a new backup is deduplicated 100%. I 
don't understand why. I though it maybe had something to do with data still 
being in the container pool, but even with reusdelay=0, everything is 
deduplicated...
Thanks for any help (Andy? :)) in advance.
Kind regards,
Eric van Loon
Air France/KLM Storage Engineering
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