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From: Konstantin Osipov <kostja.osipov@gmail.com>
To: Serge Petrenko <sergepetrenko@tarantool.org>
Cc: tarantool-patches@dev.tarantool.org, v.shpilevoy@tarantool.org
Subject: Re: [Tarantool-patches] [PATCH v4 2/4] replication: hide 0-th vclock components in replication responses
Date: Sat, 28 Mar 2020 08:57:44 +0300	[thread overview]
Message-ID: <20200328055744.GA23207@atlas> (raw)
In-Reply-To: <56c1a9001fafcd7525fdd3c6a68be2760b095532.1585303629.git.sergepetrenko@tarantool.org>

* Serge Petrenko <sergepetrenko@tarantool.org> [20/03/27 18:08]:
> If an anonymous replica is promoted to a normal one and becomes
> replication master later, its vclock contains a non-empty zero
> component, tracking local changes on this replica from the time when it
> had been anonymous. No need to pollute joining instance's vclock with
> our non-empty 0 component.
> When an anonymous replica reports its status to a remote instance it
> should also hide its 0-th vclock component.
> 
> This is needed for backward compatibility with old instances, which
> don't ignore 0th vclock component coming from a remote instance by
> default.
> Also make sure that new instances ignore 0th vclock component.

If you added vclock_compare_ignore0, suggest to introduce and use 
vclock_copy_ignore0 instead of a pair vclock_copy + vclock_reset.

Where was vclock_compare_ignore0 introduced, did I miss the
patch?

-- 
Konstantin Osipov, Moscow, Russia

  reply	other threads:[~2020-03-28  5:57 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-27 10:20 [Tarantool-patches] [PATCH v4 0/4] replication: fix local space tracking Serge Petrenko
2020-03-27 10:20 ` [Tarantool-patches] [PATCH v4 1/4] vclock: add an ability to reset individual clock components Serge Petrenko
2020-03-27 10:20 ` [Tarantool-patches] [PATCH v4 2/4] replication: hide 0-th vclock components in replication responses Serge Petrenko
2020-03-28  5:57   ` Konstantin Osipov [this message]
2020-03-30 11:02     ` Serge Petrenko
2020-03-30 12:52       ` Konstantin Osipov
2020-03-27 10:20 ` [Tarantool-patches] [PATCH v4 3/4] gc: rely on minimal vclock components instead of signatures Serge Petrenko
2020-03-28  6:03   ` Konstantin Osipov
2020-03-30 11:02     ` Serge Petrenko
2020-03-30 12:54       ` Konstantin Osipov
2020-03-27 10:20 ` [Tarantool-patches] [PATCH v4 4/4] box: start counting local space requests separately Serge Petrenko
2020-03-28  6:17   ` Konstantin Osipov
2020-03-30 11:02     ` Serge Petrenko
2020-03-28 16:23   ` Konstantin Osipov

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