From: "roger peppe" <rogpeppe@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>
Subject: Re: [9fans] 9pfuse and O_APPEND
Date: Mon, 22 Dec 2008 10:02:48 +0000 [thread overview]
Message-ID: <df49a7370812220202qe93e73cwc6d66dc0364342ab@mail.gmail.com> (raw)
In-Reply-To: <42fe5d2488144155692f859a62a64b07@quanstro.net>
On Sun, Dec 21, 2008 at 2:45 PM, erik quanstrom <quanstro@quanstro.net> wrote:
> okay, so you're using DMAPPEND like sbrk(2). how do you avoid
> clients caring about the address of this new hunk of memory?^u
> clients caring about the offset of this hunk of the file?
> that is, the same problem malloc has in a multi-threaded app
> with sbrk.
in google's filesystem, i believe a write returns the
offset it actually wrote at. if 9p was extended to do that,
maybe per-fid append semantics might be more useful.
(although if appending writes were rare enough, i suppose
you could write the block with a unique identifier and
scan to find where it actually ended up)
next prev parent reply other threads:[~2008-12-22 10:02 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
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 [this message]
2008-12-25 6:04 ` Roman Shaposhnik
2008-12-25 6:33 ` erik quanstrom
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