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From: Konstantin Osipov via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Vladislav Shpilevoy <v.shpilevoy@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [PATCH 0/4] Split vote
Date: Tue, 18 Jan 2022 10:18:20 +0300	[thread overview]
Message-ID: <20220118071820.GA894591@starling> (raw)
In-Reply-To: <710d8863-afa3-f8ba-7f11-f5c6fadd8882@tarantool.org>

* Vladislav Shpilevoy <v.shpilevoy@tarantool.org> [22/01/18 02:16]:

> >> Split vote handling in Raft, its usage in storage, and a bug fix found while
> >> working on this in the first commit.
> >>
> >> Branch: http://github.com/tarantool/tarantool/tree/gerold103/gh-5285-raft-split-vote
> >> Issue: https://github.com/tarantool/tarantool/issues/5285
> > 
> > While I don't mind this patch it is an unnecessary complication on
> > top of the spec. To prevent the deteriorating effects on liveness
> > from split vote one needs pre-voting, not split-vote detection.
> 
> I agree. I also don't like that patchset too much (not counting the first
> commit, which fixes a crash). The pros are:
> 
> - can save some seconds in case of a split-vote;
> 
> - potentially can expose all the vote counts to the monitoring, not
>   just own count.
> 
> Cons is - too much hassle in the code just for that.
> 
> Pre-voting on the other hand solves a different problem. Only slightly
> related.

Well, I don't doubt this hassle is not too harmful to the logic of
the protocol, but it's not solving all the liveness issues either. 

-- 
Konstantin Osipov, Moscow, Russia

      reply	other threads:[~2022-01-18  7:18 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-15  0:48 Vladislav Shpilevoy via Tarantool-patches
2022-01-15  0:48 ` [Tarantool-patches] [PATCH 1/4] raft: fix crash on election_timeout reconfig Vladislav Shpilevoy via Tarantool-patches
2022-01-18 13:12   ` Serge Petrenko via Tarantool-patches
2022-01-15  0:48 ` [Tarantool-patches] [PATCH 2/4] raft: track all votes, even not own Vladislav Shpilevoy via Tarantool-patches
2022-01-21  0:42   ` Vladislav Shpilevoy via Tarantool-patches
2022-01-15  0:48 ` [Tarantool-patches] [PATCH 3/4] raft: introduce split vote detection Vladislav Shpilevoy via Tarantool-patches
2022-01-18 13:20   ` Serge Petrenko via Tarantool-patches
2022-01-20  0:44     ` Vladislav Shpilevoy via Tarantool-patches
2022-01-20 10:21       ` Serge Petrenko via Tarantool-patches
2022-01-20 23:02         ` Vladislav Shpilevoy via Tarantool-patches
2022-01-15  0:48 ` [Tarantool-patches] [PATCH 4/4] election: activate raft split vote handling Vladislav Shpilevoy via Tarantool-patches
2022-01-18 13:21   ` Serge Petrenko via Tarantool-patches
2022-01-20  0:44     ` Vladislav Shpilevoy via Tarantool-patches
2022-01-16 14:10 ` [Tarantool-patches] [PATCH 0/4] Split vote Konstantin Osipov via Tarantool-patches
2022-01-17 22:57   ` Vladislav Shpilevoy via Tarantool-patches
2022-01-18  7:18     ` Konstantin Osipov via Tarantool-patches [this message]

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