In #postgresql database land today. Thinking through striping and mirroring on #ZFS. Klara Systems has unpacked a lot of this:
... This means two things: solid state and mirrors. SSD drives provide far lower latency than conventional drives possibly can. And mirrors provide far better random access performance than RAIDz can—particularly when we’re talking about small random access ops, which can’t be effectively spread across tons of disks in a wide striped vdev...
Date: 2024-06-25T23:00:00Z - 2024-06-26T00:30:00Z
Location: Johnson County Library - Lenexa City Center, 8778 Penrose Ln, Lenexa, KS 66219, United States
@jens Eventuell bezieht Erik sich auf diesen offenen Issue bei #Mastodon.
Der angegebene Link zur #PostgreSQL-Änderung nennt das Fehlerbild ziemlich genau, aber keine Lösung dafür:
In new btree indexes, the maximum index entry length is reduced by eight bytes, to improve handling of duplicate entries (Peter Geoghegan)
This means that a REINDEX operation on an index pg_upgrade'd from a previous release could potentially fail.