I have implemented a virtual block device in Linux that transparently
compresses and decompresses data. In my implementation, the unit of compression
is 4K. Multiple variable-size compressed blocks are stored in the same physical
block, which in principle requires a read-modify-write sequence.
Hello.
I want to know what is the unit of compression in ZFS. Is it 4 KB or larger? Is
it tunnable?
Thanks.
Thanos
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