From: Vladimir Davydov <vdavydov.dev@gmail.com>
To: Konstantin Osipov <kostja@tarantool.org>
Cc: tarantool-patches@freelists.org
Subject: Re: [PATCH v3 1/5] wal: preallocate disk space before writing rows
Date: Thu, 25 Oct 2018 12:24:21 +0300 [thread overview]
Message-ID: <20181025092421.ncm3c3h3nalal77i@esperanza> (raw)
In-Reply-To: <20181024170823.GI12973@chai>
On Wed, Oct 24, 2018 at 08:08:23PM +0300, Konstantin Osipov wrote:
> * Vladimir Davydov <vdavydov.dev@gmail.com> [18/10/24 16:43]:
> > This function introduces a new xlog method xlog_fallocate() that makes
> > sure that the requested amount of disk space is available at the current
> > write position. It does that with posix_fallocate(). The new method is
> > called before writing anything to WAL, see wal_fallocate(). In order not
> > to invoke the system call too often, wal_fallocate() allocates disk
> > space in big chunks (1 MB).
> >
> > The reason why I'm doing this is that I want to have a single and
> > clearly defined point in the code to handle ENOSPC errors, where
> > I could delete old WALs and retry (this is what #3397 is about).
> >
> > Needed for #3397
>
> Thank you for taking into account the comments. Please push.
Pushed to 1.10-features
next prev parent reply other threads:[~2018-10-25 9:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-24 13:43 [PATCH v3 0/5] Delete old WAL files if running out of disk space Vladimir Davydov
2018-10-24 13:43 ` [PATCH v3 1/5] wal: preallocate disk space before writing rows Vladimir Davydov
2018-10-24 17:08 ` Konstantin Osipov
2018-10-25 9:24 ` Vladimir Davydov [this message]
2018-10-24 13:43 ` [PATCH v3 2/5] wal: pass wal_watcher_msg to wal_watcher callback Vladimir Davydov
2018-10-24 13:43 ` [PATCH v3 3/5] wal: rename wal_watcher->events to pending_events Vladimir Davydov
2018-10-24 13:43 ` [PATCH v3 4/5] wal: add event_mask to wal_watcher Vladimir Davydov
2018-10-24 17:13 ` Konstantin Osipov
2018-10-24 13:43 ` [PATCH v3 5/5] wal: delete old wal files when running out of disk space Vladimir Davydov
2018-10-25 12:55 ` [PATCH v3 0/5] Delete old WAL files if " Vladimir Davydov
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