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From: Konstantin Osipov <kostja@tarantool.org>
To: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: tarantool-patches@freelists.org
Subject: Re: [PATCH 1/3] xlog: erase eof marker when reopening existing file for writing
Date: Wed, 27 Jun 2018 20:09:18 +0300	[thread overview]
Message-ID: <20180627170918.GD28358@chai> (raw)
In-Reply-To: <3ce2e8070f75cbd3022add41faf940a8809a8d1c.1529075903.git.vdavydov.dev@gmail.com>

* Vladimir Davydov <vdavydov.dev@gmail.com> [18/06/15 23:28]:
> When reopening an existing xlog file (as in case of vylog), we do not
> erase the eof marker immediately. Instead we reposition file offset
> to (file_size - sizeof eof_marker), assuming the eof marker will be
> overwritten on the first write.
> 
> However, it isn't enough if we want to reuse this function for reopening
> WAL files, because when scanning the WAL directory we close a file if we
> read eof marker and never reopen it again, see recover_remaining_wals().
> So to avoid skipping rows written to a once closed WAL, we have to erase
> the eof marker when reopening an xlog file. Let's do it with truncate().
> ---
>  src/box/xlog.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)

Looks good, will push shortly.

-- 
Konstantin Osipov, Moscow, Russia, +7 903 626 22 32
http://tarantool.io - www.twitter.com/kostja_osipov

  reply	other threads:[~2018-06-27 17:09 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-08 17:34 [PATCH v2 00/11] Replica rejoin Vladimir Davydov
2018-06-08 17:34 ` [PATCH v2 01/11] box: retrieve instance uuid before starting local recovery Vladimir Davydov
2018-06-08 17:51   ` Konstantin Osipov
2018-06-08 17:34 ` [PATCH v2 02/11] box: refactor hot standby recovery Vladimir Davydov
2018-06-08 17:34 ` [PATCH v2 03/11] box: retrieve end vclock before starting local recovery Vladimir Davydov
2018-06-14 12:58   ` Konstantin Osipov
2018-06-08 17:34 ` [PATCH v2 04/11] box: open the port " Vladimir Davydov
2018-06-13 20:43   ` Konstantin Osipov
2018-06-14  8:31     ` Vladimir Davydov
2018-06-14 12:59       ` Konstantin Osipov
2018-06-15 15:48         ` [PATCH 0/3] Speed up recovery in case rebootstrap is not needed Vladimir Davydov
2018-06-15 15:48           ` [PATCH 1/3] xlog: erase eof marker when reopening existing file for writing Vladimir Davydov
2018-06-27 17:09             ` Konstantin Osipov [this message]
2018-06-15 15:48           ` [PATCH 2/3] wal: rollback vclock on write failure Vladimir Davydov
2018-06-27 17:22             ` Konstantin Osipov
2018-06-15 15:48           ` [PATCH 3/3] wal: create empty xlog on shutdown Vladimir Davydov
2018-06-27 17:29             ` Konstantin Osipov
2018-06-08 17:34 ` [PATCH v2 05/11] box: connect to remote peers before starting local recovery Vladimir Davydov
2018-06-13 20:45   ` Konstantin Osipov
2018-06-14  8:34     ` Vladimir Davydov
2018-06-14 12:59       ` Konstantin Osipov
2018-06-08 17:34 ` [PATCH v2 06/11] box: factor out local recovery function Vladimir Davydov
2018-06-13 20:50   ` Konstantin Osipov
2018-06-08 17:34 ` [PATCH v2 07/11] applier: inquire oldest vclock on connect Vladimir Davydov
2018-06-13 20:51   ` Konstantin Osipov
2018-06-14  8:40     ` Vladimir Davydov
2018-06-08 17:34 ` [PATCH v2 08/11] replication: rebootstrap instance on startup if it fell behind Vladimir Davydov
2018-06-13 20:55   ` Konstantin Osipov
2018-06-14  8:58     ` Vladimir Davydov
2018-06-08 17:34 ` [PATCH v2 09/11] vinyl: simplify vylog recovery from backup Vladimir Davydov
2018-06-08 17:34 ` [PATCH v2 10/11] vinyl: pass flags to vy_recovery_new Vladimir Davydov
2018-06-13 20:56   ` Konstantin Osipov
2018-06-08 17:34 ` [PATCH v2 11/11] vinyl: implement rebootstrap support Vladimir Davydov
2018-06-10 12:02   ` Vladimir Davydov

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