jgroups-raft Reads should not create an entry in the log

Currently, read requests can either be dirty (handled locally) or are added to the log as normal entries. In the latter case, there's a write to disk which is costly. Implement a third solution that provides linearizable reads as described in section 6.4 of [1].

[1] https://github.com/ongardie/dissertation

Apr 02 '15 16:04 belaban

Oh cool, someone's been reading that thing I wrote :)

Apr 03 '15 01:04 ongardie

And even more than once ! :-) Great dissertation ! Unfortunately most (including my own) are throwaway stuff :-)

Apr 03 '15 06:04 belaban

Implement this in all building blocks (including ReplicatedStateMachine)

May 15 '15 06:05 belaban

Hi Belaban, I am starting to use this here . Is it ok to assume this issue is no more in 3.6.6 final?

By the way, thank you so much for your coding.

Oct 23 '15 01:10 mauricioscastro

Hi @mauricioscastro, jgroups-raft is at release 0.2 and is independent from the JGroups (e.g. 3.6.6) project. Issue #18 is still open, and will remain open for some time, as I had to go back to JGroups, to work on the 4.0 release. I will come back to work on jgroups-raft, but don't know yet when. However, #18 doesn't render jgroups-raft incorrect, it merely slows down reads as a read is treated (more or less) like a write. You could turn this off if you wanted potentially stale reads. Cheers,

Oct 23 '15 08:10 belaban