Show HN: Uberblok – an interactive museum of ZFS internals
Uberblok is an interactive educational tool that visualizes the internal workings of the ZFS file system. It uses animations linked to specific code commits to explain how ZFS handles data integrity and crash recovery.
Why it matters
It provides a rare, accessible look into complex storage architecture, helping developers and system administrators understand how data reliability is maintained at the block level.
Storage has always had the same enemies: disks that lie, writes cut short, a crash in the middle of an update. ZFS answers them with a handful of ideas. This museum shows them one room at a time, from the code that implements them.
Every animation maps to lines of OpenZFS zfs-2.4.4 , frozen at commit 71a9f9578616 , and every excerpt links to them. Nothing here is drawn from memory.
1 2 3 4 Fig. 1. The Hall’s object under the glass: struct uberblock , lines 122–128 of include/ sys/ uberblock_impl.h at zfs-2.4.4 , printed with lines 36–150 of its file.
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