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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 1/2] replication: introduce ballot.can_be_leader
Date: Fri, 16 Jul 2021 17:29:59 +0300
Message-ID: <20210716142959.GC146960@starling> (raw)
In-Reply-To: <0c92a88ff1d392f8b03de59be8cb19a162bf78f8.1626392372.git.v.shpilevoy@tarantool.org>

* Vladislav Shpilevoy via Tarantool-patches <tarantool-patches@dev.tarantool.org> [21/07/16 11:23]:
> The flag tells whether the sender has election mode 'candidate' or
> 'manual'.
> 
> The new field during bootstrap will help to avoid selecting a
> 'voter' as a master. Voters can't write, they are unable to boot
> themselves nor register others.
> 
> @TarantoolBot document
> Title: New field - IPROTO_BALLOT_CAN_BE_LEADER
> It is sent as a part of `IPROTO_BALLOT (0x29)`. The field is a
> boolean flag which is true if the sender has `election_mode` in
> its config `'manual'` or `'candidate'`.
> 
> During bootstrap the nodes able to become a leader are preferred
> over the nodes configured as `'voter'`.

Curious why did you add this feature in the first place, I mean
"eligibility"? Each voter has to be able to become a leader,
otherwise raft liveness guarantees are violated. Raft has
learners, but learners neither vote nor can become leaders.


-- 
Konstantin Osipov, Moscow, Russia

  parent reply	other threads:[~2021-07-16 14:30 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-15 23:49 [Tarantool-patches] [PATCH 0/2] Bootstrap voter Vladislav Shpilevoy via Tarantool-patches
2021-07-15 23:49 ` [Tarantool-patches] [PATCH 1/2] replication: introduce ballot.can_be_leader Vladislav Shpilevoy via Tarantool-patches
2021-07-16 10:59   ` Serge Petrenko via Tarantool-patches
2021-07-18 17:00     ` Vladislav Shpilevoy via Tarantool-patches
2021-07-19  9:11       ` Sergey Petrenko via Tarantool-patches
2021-07-16 14:29   ` Konstantin Osipov via Tarantool-patches [this message]
2021-07-18 17:00     ` Vladislav Shpilevoy via Tarantool-patches
2021-07-19  9:12       ` Konstantin Osipov via Tarantool-patches
2021-07-19 22:06         ` Vladislav Shpilevoy via Tarantool-patches
2021-07-20  8:49           ` Konstantin Osipov via Tarantool-patches
2021-07-20 20:02             ` Vladislav Shpilevoy via Tarantool-patches
2021-07-20 20:18               ` Konstantin Osipov via Tarantool-patches
2021-07-20 21:16         ` Cyrill Gorcunov via Tarantool-patches
2021-07-20 23:20           ` Konstantin Osipov via Tarantool-patches
2021-07-21 18:51             ` Cyrill Gorcunov via Tarantool-patches
2021-07-21 21:43             ` Vladislav Shpilevoy via Tarantool-patches
2021-07-15 23:49 ` [Tarantool-patches] [PATCH 2/2] election: during bootstrap prefer candidates Vladislav Shpilevoy via Tarantool-patches
2021-07-16 11:30   ` Serge Petrenko via Tarantool-patches
2021-07-18 17:00     ` Vladislav Shpilevoy via Tarantool-patches
2021-07-16 14:27 ` [Tarantool-patches] [PATCH 0/2] Bootstrap voter Konstantin Osipov via Tarantool-patches
2021-07-18 17:00   ` Vladislav Shpilevoy via Tarantool-patches
2021-07-19  9:13     ` Konstantin Osipov via Tarantool-patches
2021-07-19 22:04       ` Vladislav Shpilevoy via Tarantool-patches

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