Hacker News Reader

Comment by throw0101b | Hacker News Reader

> SQLite on ZFS needs the Fsync behaviour to be off […]

    zfs set sync=disabled mydata/mydb001

* https://openzfs.github.io/openzfs-docs/man/master/7/zfsprops...

View on HN

As noted in a sibling comment, this causes corruption on power failure.

This is a bug in zfs or in sqlite, sync=disabled should never cause actual corruption (it should at worst make existing corruption bugs in sqlite more likely & cause loss of committed sqlite transactions)

(see https://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSTXGsAndZ... for an explanation of sync=disabled)

I highly doubt it's an SQLite bug, considering how thoroughly they test their code to behave correctly as long as their assumptions are filled. And those assumptions are clearly violated when SQLite runs on ZFS with sync=disabled (since writes may not be written to disk despite fsync).

Reply on news.ycombinator.com