From: Kirill Yukhin <kyukhin@tarantool.org>
To: tarantool-patches@freelists.org
Subject: [tarantool-patches] Re: [PATCH v2] relay: join new replicas off read view
Date: Fri, 13 Sep 2019 11:19:00 +0300 [thread overview]
Message-ID: <20190913081900.hnjc2a7pyr3cu77v@tarantool.org> (raw)
In-Reply-To: <fd1cc7c51b0d039a53eab9efc7799a6748d63148.1566894116.git.vdavydov.dev@gmail.com>
Hello,
On 27 Aug 11:33, Vladimir Davydov wrote:
> Historically, we join a new replica off the last checkpoint. As a
> result, we must always keep the last memtx snapshot and all vinyl data
> files corresponding to it. Actually, there's no need to use the last
> checkpoint for joining a replica. Instead we can use the current read
> view as both memtx and vinyl support it. This should speed up the
> process of joining a new replica, because we don't need to replay all
> xlogs written after the last checkpoint, only those that are accumulated
> while we are relaying the current read view. This should also allow us
> to avoid creating a snapshot file on bootstrap, because the only reason
> why we need it is allowing joining replicas. Besides, this is a step
> towards decoupling the vinyl metadata log from checkpointing in
> particular and from xlogs in general.
>
> Closes #1271
I've checked your patch into master.
--
Regrads, Kirill Yukhin
prev parent reply other threads:[~2019-09-13 8:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-27 8:33 Vladimir Davydov
2019-09-13 8:19 ` Kirill Yukhin [this message]
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