On Fri, Jan 8, 2021 at 2:29 PM Matteo Merli <matteo.me...@gmail.com> wrote:
> On Fri, Jan 8, 2021 at 2:15 PM Venkateswara Rao Jujjuri > <jujj...@gmail.com> wrote: > > > > > otherwise the write will timeout internally and it will get replayed > to a > > new bookie. > > If Qa is met and the writes of Qw-Qa fail after we send the success to > the > > client, why would the write replayed on a new bookie? > > I think the original intention was to avoid having 1 bookie with a > "hole" in the entries sequence. If you then lose one of the 2 bookies, > it would be difficult to know which entries need to be recovered. > @Matteo Merli <matteo.me...@gmail.com> I don't believe we retry the write on bookie if Qa is satisfied and the write to a bookie timedout. Once the entry is ack'ed to the client we move the LAC and can't retroactively change the active segment's ensemble. > will get replayed to a new bookie This will happen only if we are not able to satisfy Qa and go through ensemble changes. We change the ensemble and tetry write only if bookie write fails before satisfying Qa. We have added a new feature called handling "delayed write failure", but that happens only for new entries not retroactively. I may be missing something here, and not understanding your point. Thanks, JV -- Jvrao --- First they ignore you, then they laugh at you, then they fight you, then you win. - Mahatma Gandhi
