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ZFS Swap on Linux
(lemmy.world)
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this post was submitted on 13 Dec 2023
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ZFS is a large consu6 of RAM. I would think putting swap in ZFS is a terrible idea. I have not checked current recommendations.
OK I've only come across the command in the example twice whilst looking.
https://github.com/64kramsystem/zfs-installer/blob/573b23b69e3efcfef5038a516ee359e64b337f43/install-zfs.sh#L1293
And here where they say it does work ?
https://www.reddit.com/r/zfs/comments/psr6bp/comment/hdrk237/
You might try adding a cache drive instead. It can help lessen the memory usage zfs needs to maintain speed. My server is spinning rust with an ssd drive attached to the pool as cache.
Command would be “zpool add pool_name cache /dev/sdX” where pool_name is the pool you want the cache on, and /dev/sdX is the empty drive you want to use with it (or partition). Make sure to encrypt this drive before setting this up, my knowledge is zfs doesn’t do that for you.
see here for a bit more information on caching.
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It’s 512GB of ssd cache plus 128GB of ram, so for now that’s been enough
Ah sorry I responded to the wrong post somehow. Meant that for OP
ZFS was built initially for large SANs so it's very cache driven. You should get two SSDs and add both for cache.