From: Vladislav Shpilevoy <v.shpilevoy@tarantool.org>
To: Sergey Ostanevich <sergos@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org
Subject: Re: [Tarantool-patches] [RFC] Quorum-based synchronous replication
Date: Wed, 22 Apr 2020 22:28:03 +0200 [thread overview]
Message-ID: <87b94067-69c6-9c80-be83-8a4a029d52a8@tarantool.org> (raw)
In-Reply-To: <20200422165029.GB112@tarantool.org>
>>>> Basically, it would be nice to see the split-brain problem description here,
>>>> and its solution for us.
>>>>
>>> I believe the split-brain is under orchestrator control either - we
>>> should provide API to switch leader in the cluster, so that when a
>>> former leader came back it will not get quorum for any txn it has,
>>> replying to customers with failure as a result.
>>
>> Exactly. We should provide something for this from inside. But are there
>> any details? How should that work? Should all the healthy replicas reject
>> everything from the false-leader? Should the false-leader somehow realize,
>> that it is not considered a leader anymore, and should stop itself? If we
>> choose the former way, how a replica defines who is the true leader? For
>> example, some replicas still may consider the old leader as a true master.
>> If we choose the latter way, what is the algorithm of determining that we
>> are not a leader anymore?
>>
> It is all about external orchestration - if replica can't get ping from
> leader it stops, reporting its status to orchestrator.
> If leader lost number of replicas that makes quorum impossible - it
> stops replication, reporting to the orchestrator.
> Will it be sufficient to cover the question?
Perhaps.
next prev parent reply other threads:[~2020-04-22 20:28 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-03 21:08 Sergey Ostanevich
2020-04-07 13:02 ` Aleksandr Lyapunov
2020-04-08 9:18 ` Sergey Ostanevich
2020-04-08 14:05 ` Konstantin Osipov
2020-04-08 15:06 ` Sergey Ostanevich
2020-04-14 12:58 ` Sergey Bronnikov
2020-04-14 14:43 ` Sergey Ostanevich
2020-04-15 11:09 ` sergos
2020-04-15 14:50 ` sergos
2020-04-16 7:13 ` Aleksandr Lyapunov
2020-04-17 10:10 ` Konstantin Osipov
2020-04-17 13:45 ` Sergey Ostanevich
2020-04-20 11:20 ` Serge Petrenko
2020-04-20 23:32 ` Vladislav Shpilevoy
2020-04-21 10:49 ` Sergey Ostanevich
2020-04-21 22:17 ` Vladislav Shpilevoy
2020-04-22 16:50 ` Sergey Ostanevich
2020-04-22 20:28 ` Vladislav Shpilevoy [this message]
2020-04-23 6:58 ` Konstantin Osipov
2020-04-23 9:14 ` Konstantin Osipov
2020-04-23 11:27 ` Sergey Ostanevich
2020-04-23 11:43 ` Konstantin Osipov
2020-04-23 15:11 ` Sergey Ostanevich
2020-04-23 20:39 ` Konstantin Osipov
2020-04-23 21:38 ` Vladislav Shpilevoy
2020-04-23 22:28 ` Konstantin Osipov
2020-04-30 14:50 ` Sergey Ostanevich
2020-05-06 8:52 ` Konstantin Osipov
2020-05-06 16:39 ` Sergey Ostanevich
2020-05-06 18:44 ` Konstantin Osipov
2020-05-12 15:55 ` Sergey Ostanevich
2020-05-12 16:42 ` Konstantin Osipov
2020-05-13 21:39 ` Vladislav Shpilevoy
2020-05-13 23:54 ` Konstantin Osipov
2020-05-14 20:38 ` Sergey Ostanevich
2020-05-20 20:59 ` Sergey Ostanevich
2020-05-25 23:41 ` Vladislav Shpilevoy
2020-05-27 21:17 ` Sergey Ostanevich
2020-06-09 16:19 ` Sergey Ostanevich
2020-06-11 15:17 ` Vladislav Shpilevoy
2020-06-12 20:31 ` Sergey Ostanevich
2020-05-13 21:36 ` Vladislav Shpilevoy
2020-05-13 23:45 ` Konstantin Osipov
2020-05-06 18:55 ` Konstantin Osipov
2020-05-06 19:10 ` Konstantin Osipov
2020-05-12 16:03 ` Sergey Ostanevich
2020-05-13 21:42 ` Vladislav Shpilevoy
2020-05-14 0:05 ` Konstantin Osipov
2020-05-07 23:01 ` Konstantin Osipov
2020-05-12 16:40 ` Sergey Ostanevich
2020-05-12 17:47 ` Konstantin Osipov
2020-05-13 21:34 ` Vladislav Shpilevoy
2020-05-13 23:31 ` Konstantin Osipov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87b94067-69c6-9c80-be83-8a4a029d52a8@tarantool.org \
--to=v.shpilevoy@tarantool.org \
--cc=sergos@tarantool.org \
--cc=tarantool-patches@dev.tarantool.org \
--subject='Re: [Tarantool-patches] [RFC] Quorum-based synchronous replication' \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox