... but not from me today.
As a result of a certain vendor (Data Domain) making certain -- well -- interesting claims, a few of our EMC brethren felt the need to explain a bit more about how the technology works. If nothing else, it's pretty interesting if you like to understand more than just what the marketing literature says.
Bottom line -- if you're doing dedupe for backup, you're going to have to decide whether you want to reduce data before you hit the network, or afterwards.
I'm not saying which is best -- as I can imagine scenarios where one or the other would be ideal, but understanding the difference is helpful as you wade through the various backup dedupe claims.
Props to Mark at StorageZilla and Scott at The Backup Blog for shining a bit more light on the topic.
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