From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] 9pfuse and O_APPEND
Date: Fri, 19 Dec 2008 15:22:40 -0500 [thread overview]
Message-ID: <89e99b810d2817476d32357364799ce4@quanstro.net> (raw)
In-Reply-To: <998EB623-CFD3-4E15-BD85-D2111D8A896B@sun.com>
> It is difficult to answer your question without knowing what rewrite
> actually does and how mailboxes are structured. But in an imaginary
> world where a mailbox is a list of constant sized blocks (size<iounit)
> a bunch of simultaneous appends and rewrites of existing blocks
> would work perfectly well.
(your imaginary mailbox sounds like a wormhole that builds a filesystem
inside a file.)
a mailbox, if you recall from unix, is a bunch of messages concatinated
into a file. each message is framed by a "From " line and a blank line.
obviously, this is not efficient for big mailboxes. since i support users
with GB+ mailboxes, i implemented a one-file-per message scheme
which doesn't require append semantics, though it does use atomic
open.
- erik
next prev parent reply other threads:[~2008-12-19 20:22 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-18 23:34 Roman Shaposhnik
2008-12-18 23:57 ` Russ Cox
2008-12-19 0:03 ` ron minnich
2008-12-19 3:06 ` Roman Shaposhnik
2008-12-19 3:26 ` ron minnich
2008-12-19 3:59 ` Roman Shaposhnik
2008-12-19 16:44 ` ron minnich
2008-12-19 19:21 ` Anthony Sorace
2008-12-19 19:31 ` erik quanstrom
2008-12-19 19:41 ` ron minnich
2008-12-19 19:59 ` Roman Shaposhnik
2008-12-19 20:06 ` erik quanstrom
2008-12-19 20:18 ` Charles Forsyth
2008-12-21 5:08 ` Roman V. Shaposhnik
2008-12-19 3:03 ` Roman Shaposhnik
2008-12-19 3:43 ` erik quanstrom
2008-12-19 3:54 ` Roman Shaposhnik
2008-12-19 4:13 ` geoff
2008-12-19 8:23 ` Russ Cox
2008-12-19 19:49 ` Roman Shaposhnik
2008-12-19 19:56 ` erik quanstrom
2008-12-19 20:10 ` Roman Shaposhnik
2008-12-19 20:22 ` erik quanstrom [this message]
2008-12-19 20:02 ` ron minnich
2008-12-19 14:21 ` erik quanstrom
2008-12-19 21:00 ` ron minnich
2008-12-19 21:32 ` Charles Forsyth
2008-12-19 21:29 ` ron minnich
2008-12-21 5:05 ` Roman V. Shaposhnik
2008-12-21 14:45 ` erik quanstrom
2008-12-22 10:02 ` roger peppe
2008-12-25 6:04 ` Roman Shaposhnik
2008-12-25 6:33 ` erik quanstrom
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=89e99b810d2817476d32357364799ce4@quanstro.net \
--to=quanstro@quanstro.net \
--cc=9fans@9fans.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).