Latest TDB2 design and code...

[tridge at samba.org]

Hi Ronnie,

 > But I really really really would like to see
 > cheap read-only snapshots, and cheap compute delta between two snapshots.

why? I suspect snapshots will add a lot of complexity to the code, so
what is the payoff for that complexity?

I suspect you want this for inter-cluster ctdb. Perhaps instead you
can put the snapshot support in ctdbd itself, and use a minimal set of
hooks in tdb that allow you to record changes, similar to the locking
hooks that Rusty is proposing.

Cheers, Tridge