Global vs. Job Based Deduplication
There is a clear winner and it is… GLOBAL. We are not surprised.
Recently we (Unitrends / PHD Virtual) have heard a lot of noise around different deduplication methods from various vendors, specifically comparing per-job deduplication with our global deduplication/virtual-full backup model.
It has been claimed that if you have a single job then you effectively have global deduplication. This may seem to make sense at first, but when you look a little deeper there are a number of big problems with that statement.
The First Week
We performed internal comparison testing between the upcoming UVB v8 (Unitrends Virtual Backup, formally PHD Virtual Backup and Replication) and competitors’ current offerings. A number of standard windows servers were deployed totaling 1TB of source data, and 5% changed data written for every subsequent backup. Both products backed up the exact same VMs using all default settings. These VMs were in a single job so we were allowing the competitor to perform to their best (so they say).
Read the entire article here, Global vs. Job Based Deduplication
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