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With ZFS I hear it's "pick one, and you cannot pick `low memory'".
by dozzie 9y ago
With ZFS I hear it's "pick one, and you cannot pick `low memory'".
- aidenn0 9y agoYou can run ZFS with megabytes of ram, it's just slow, so it is pick 2. That being said, ZFS metadata is much bigger than it needs to be (most infamously dedupe has this issue).
- chongli 9y agoRight, but to then compare the memory use of ZFS with dedupe turned on against another fs without that feature would be disingenuous since dedupe is optional in ZFS. That was the whole point of my original comment.
- mrighele 9y agodeduplication doesn't have necessarily to be expensive; HAMMER (the first version, not HAMMER2) has offline deduplication that is usually scheduled to run at night. This allows regular use to be quite performant and with a low memory footprint. Of course there are tradeoffs, in particular heavy disk usage at certain hours (which can be an issue depending on the workload) and the fact that space is reclaimed only after some time that it has been wasted.
- aidenn0 9y agoI did say that ZFS metadata in general, and dedupe especially is much bigger than it needs to be. Even live dedupe can be done much more cheaply than how ZFS does it.
- gigatexal 9y agoLol this is FUD. ZFS is easily tunable to not blow up and use all your ram.
- snovv_crash 9y agoDepends if you want dedup.
- benchaney 9y agoDoes "FUD" just mean "something I disagree with" now? How is this FUD?
- gigatexal 9y agoSpreading misinformation is what I was taking issue with not just disagreeing and making a stink about it like a troll might.