Tarantool development patches archive
 help / color / mirror / Atom feed
From: Kirill Yukhin via Tarantool-patches <tarantool-patches@dev.tarantool.org>
To: Serge Petrenko <sergepetrenko@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org, v.shpilevoy@tarantool.org
Subject: Re: [Tarantool-patches] [PATCH v2 0/7] applier: handle synchronous transactions during final
Date: Mon, 5 Apr 2021 16:15:39 +0000	[thread overview]
Message-ID: <20210405161539.jmsyjasmy7ykilnz@tarantool.org> (raw)
In-Reply-To: <cover.1616588119.git.sergepetrenko@tarantool.org>

Hello,

On 24 мар 15:24, Serge Petrenko via Tarantool-patches wrote:
> Initially this patches idea was to ignore synchronous rows on applier side and
> make it so that there are no rolled back transactions in final join stream on
> master side.
> 
> Unfortunately, this easy fix didn't work. The reason for it is that once the
> replica receives initial data, up to `start_vclock`, the final join stream has
> to start right at `start_vclock` so that we do not lose any transactions.
> 
> This means that once master encounters a synchro rollback and makes replica
> retry final join to get rid of the rollback, it still has to send it together
> with other data. And this rollback must be processed by applier to avoid
> conflicts.
> 
> In order to let applier process synchro requests (CONFIRM and ROLLBACK) we need
> to make final join transactional, obviously. This is what this patchset does.
> 
> An alternative would be to retry not only final, but also initial join every
> time master receives a rollback during final join stage. This would be too
> violent due to possibly huge data amounts being sent during initial join.
> 
> Changes in v2:
>   - Make applier transactional on final join stage
>   - Remove guards for rollback during final join on master side
>   - Some refactoring in preparation to #5874
> 
> https://github.com/tarantool/tarantool/issues/5566
> https://github.com/tarantool/tarantool/tree/sp/gh-5566-final-join-synchro-v2

I've checked your patchset into 2.6, 2.7 and master.

--
Regards, Kirill Yukhin

      parent reply	other threads:[~2021-04-05 16:15 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-24 12:24 Serge Petrenko via Tarantool-patches
2021-03-24 12:24 ` [Tarantool-patches] [PATCH v2 1/7] replication: fix a hang on final join retry Serge Petrenko via Tarantool-patches
2021-03-26 20:44   ` Vladislav Shpilevoy via Tarantool-patches
2021-03-27 16:52     ` Serge Petrenko via Tarantool-patches
2021-03-29 21:50       ` Vladislav Shpilevoy via Tarantool-patches
2021-03-24 12:24 ` [Tarantool-patches] [PATCH v2 2/7] applier: extract tx boundary checks from applier_read_tx into a separate routine Serge Petrenko via Tarantool-patches
2021-03-26 12:35   ` Cyrill Gorcunov via Tarantool-patches
2021-03-27 16:54     ` Serge Petrenko via Tarantool-patches
2021-03-24 12:24 ` [Tarantool-patches] [PATCH v2 3/7] applier: extract plain tx application from applier_apply_tx() Serge Petrenko via Tarantool-patches
2021-03-26 20:47   ` Vladislav Shpilevoy via Tarantool-patches
2021-03-27 17:34     ` Serge Petrenko via Tarantool-patches
2021-03-27 18:30   ` [Tarantool-patches] [PATCH v2 3.5/7] applier: fix not releasing the latch on apply_synchro_row() fail Serge Petrenko via Tarantool-patches
2021-03-29 21:50     ` Vladislav Shpilevoy via Tarantool-patches
2021-03-30  8:15       ` Serge Petrenko via Tarantool-patches
2021-03-24 12:24 ` [Tarantool-patches] [PATCH v2 4/7] applier: remove excess last_row_time update from subscribe loop Serge Petrenko via Tarantool-patches
2021-03-24 12:24 ` [Tarantool-patches] [PATCH v2 5/7] applier: make final join transactional Serge Petrenko via Tarantool-patches
2021-03-26 20:49   ` Vladislav Shpilevoy via Tarantool-patches
2021-03-27 19:05     ` Serge Petrenko via Tarantool-patches
2021-03-29 21:51       ` Vladislav Shpilevoy via Tarantool-patches
2021-03-30  8:15         ` Serge Petrenko via Tarantool-patches
2021-03-24 12:24 ` [Tarantool-patches] [PATCH v2 6/7] replication: tolerate synchro rollback during final join Serge Petrenko via Tarantool-patches
2021-03-24 12:45   ` Serge Petrenko via Tarantool-patches
2021-03-26 20:49   ` Vladislav Shpilevoy via Tarantool-patches
2021-03-27 19:23     ` Serge Petrenko via Tarantool-patches
2021-03-24 12:24 ` [Tarantool-patches] [PATCH v2 7/7] replication: do not ignore replica vclock on register Serge Petrenko via Tarantool-patches
2021-03-26 20:50   ` Vladislav Shpilevoy via Tarantool-patches
2021-03-27 20:13     ` Serge Petrenko via Tarantool-patches
2021-03-29 21:51       ` Vladislav Shpilevoy via Tarantool-patches
2021-03-30  8:16         ` Serge Petrenko via Tarantool-patches
2021-03-30 12:33       ` Serge Petrenko via Tarantool-patches
2021-03-26 13:46 ` [Tarantool-patches] [PATCH v2 0/7] applier: handle synchronous transactions during final Cyrill Gorcunov via Tarantool-patches
2021-03-30 20:13 ` Vladislav Shpilevoy via Tarantool-patches
2021-04-05 16:15 ` Kirill Yukhin via Tarantool-patches [this message]

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=20210405161539.jmsyjasmy7ykilnz@tarantool.org \
    --to=tarantool-patches@dev.tarantool.org \
    --cc=kyukhin@tarantool.org \
    --cc=sergepetrenko@tarantool.org \
    --cc=v.shpilevoy@tarantool.org \
    --subject='Re: [Tarantool-patches] [PATCH v2 0/7] applier: handle synchronous transactions during final' \
    /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