From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Qiantan Hong <qhong@mit.edu>
Cc: Tassilo Horn <tsdh@gnu.org>,
"emacs-devel@gnu.org" <emacs-devel@gnu.org>,
Zhu Zihao <all_but_last@163.com>
Subject: Re: Against sqlite3!!!
Date: Tue, 07 Dec 2021 14:52:08 -0500 [thread overview]
Message-ID: <jwvmtlcurfo.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <28E143D2-5C8F-4CDC-B6CE-15F672A00AB1@mit.edu> (Qiantan Hong's message of "Tue, 7 Dec 2021 16:35:47 +0000")
> Since it records a log of deltas instead of printing the whole data structure,
> different key won’t interfere.
> Being said that, currently it probably won’t work because UNIX append
> is not atomic and will probably be interleaved into nonsense.
> There’re various workarounds, lock file being one, but I like
> the idea of keeping only one “controller” instance with exclusive
> access to the file more.
I think allowing several instances to use the file at the same time is
important (I always have 2 sessions active at the same time and I'd like
to be able to use (and share) savehist with both of them).
But that only means having to lock while we're saving, which is a very
short time. It also requires being able to refresh the in-memory data
once we detect that the ondisk data has been changed.
Stefan
next prev parent reply other threads:[~2021-12-07 19:52 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <MN2PR12MB3391BC76A0D05236AC76C94E946E9@MN2PR12MB3391.namprd12.prod.outlook.com>
2021-12-07 8:13 ` Against sqlite3!!! (Was: sqlite3) Qiantan Hong
2021-12-07 9:14 ` Qiantan Hong
2021-12-07 12:49 ` Against sqlite3!!! Colin Baxter 😺
2021-12-07 13:21 ` Stefan Monnier
2021-12-07 13:55 ` Qiantan Hong
2021-12-07 15:51 ` Tassilo Horn
2021-12-07 16:35 ` Qiantan Hong
2021-12-07 18:43 ` Arthur Miller
2021-12-07 19:13 ` Qiantan Hong
2021-12-07 19:34 ` Tassilo Horn
2021-12-08 10:00 ` Yuri Khan
2021-12-07 19:52 ` Stefan Monnier [this message]
2021-12-07 13:45 ` Against sqlite3!!! (Was: sqlite3) Zhu Zihao
2021-12-07 14:50 ` Against sqlite3!!! David Engster
2021-12-07 20:00 ` Lars Ingebrigtsen
2021-12-08 6:11 ` Arthur Miller
2021-12-08 6:20 ` Qiantan Hong
2021-12-08 9:21 ` Arthur Miller
2021-12-08 9:28 ` Qiantan Hong
2021-12-09 7:12 ` Alexandre Garreau
2021-12-09 7:27 ` Qiantan Hong
[not found] ` <24465971.J1OoJ6LT5i@galex-713.eu>
2021-12-09 7:50 ` Qiantan Hong
2021-12-09 19:16 ` Thierry Volpiatto
2021-12-09 19:24 ` Qiantan Hong
2021-12-09 19:28 ` Qiantan Hong
2021-12-09 13:17 ` Stefan Monnier
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