HAMMER & HAMMER2: volumes of different sizes, dedupe, mirroring, and stability
Xianwen Chen (陈贤文)
xchen at live.no
Fri Jan 7 17:39:01 PST 2022
I got quite a few questions regarding HAMMER & HAMMER 2 fs.
I haven't been able to find out whether HAMMER & HAMMER2 fs could add
volumes of different sizes. Let's assume that there are 4 hard drives:
200 GB, 300 GB, 400 GB, and 500 GB. Could I put all these 4 hard drives
under HAMMER or HAMMER 2 fs and have a total of 1400 GB storage? Or will
there be just 800 GB like ZFS?
Do I understand it correctly that HAMMER fs only supports offline
dedupe? Does HAMMER 2 fs support online dedupe?
It seems that mirroring is the way to have data redundancy in HAMMER and
HAMMER 2. Continuing with the example of 4 hard drives (200 GB, 300 GB,
400 GB, and 500 GB), will I be able to have 3 mirrors, in addition to
the ``original'' one where mirrors copy data from?
Is there any risk of data loss when I add and remove volumes?
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