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Looking at this diagrams I wonder if there are any file systems that allow for metadata to be stored on a separate device. For example store data on HDD and met
by densh 3y ago
Looking at this diagrams I wonder if there are any file systems that allow for metadata to be stored on a separate device. For example store data on HDD and metadata on an associated SSD drive. I guess the benefits would not be extraordinary to outweigh the added complexity since metadata is much easier to cache in memory.
- riddley 3y agoZFS does. I've heard of other file systems that can put their journal on a separate device but web search sucks these days and I ran out of time to figure out which.
- rubiquity 3y agoBcacheFS does this
- pixl97 3y agoSee special-vdev in this article. https://klarasystems.com/articles/openzfs-understanding-zfs-vdev-types/ https://klarasystems.com/articles/openzfs-understanding-zfs-...
- loeg 3y agoFacebook abuses XFS realtime mode to do this. Omar discusses it some here: https://lwn.net/Articles/943693/ https://lwn.net/Articles/943693/