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A comment on ZFS Deduplication. Parent comment
Imagine you have 10 VMware virtual machines, and all the VM files are stored on a ZFS server with dedupe support.
Let's say that the base install image is 2GB in size of OS, GUI, Java libraries, etc.
Non-dedupe scenario means 20GB of storage is used.
Dedupe scenario means maybe, 2.5GB of storage is used due to slight differences in the way the blocks are arranged, etc.
Now you add an 11th VM, same OS, same base setup. Storage goes up by maybe 100MB even though the VM has the same 2GB of files.
Do you see how zipping a file would not show you that effect?
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Imagine you have 10 VMware virtual machines, and all the VM files are stored on a ZFS server with dedupe support.
Let's say that the base install image is 2GB in size of OS, GUI, Java libraries, etc.
Non-dedupe scenario means 20GB of storage is used.
Dedupe scenario means maybe, 2.5GB of storage is used due to slight differences in the way the blocks are arranged, etc.
Now you add an 11th VM, same OS, same base setup. Storage goes up by maybe 100MB even though the VM has the same 2GB of files.
Do you see how zipping a file would not show you that effect?