Il Dom 21 Nov 2021, 16:15 735367737 <735367...@qq.com> ha scritto:
> hi：
> I'm a newer to bookkeeper. i read the Durability with BookKeeper
> <https://www.researchgate.net/publication/262272803_Durability_with_BookKeeper>
> before i read bookkeeper's code. i got a question about journal.I paper it
> says journal is write-ahead log and stores synchronously and sequentially
> all updates the bookie executes . but when i read code .i found the entry
> write into ledgerStorage before write into
> journal(Bookie.addEntryInternal).is there something i miss ?
>
It is actually not a problem because:
- entries are immutabile
- the reader is prevented from reading data not acknowledged by the writer
by the Last Add Confirmed protocol
Enrico
thanks.
>
