From: Latchesar Ionkov <lionkov@lanl.gov>
To: Fans of the OS Plan 9 from Bell Labs <9fans@cse.psu.edu>
Subject: Re: [9fans] QTCTL?
Date: Thu, 1 Nov 2007 10:16:36 -0600 [thread overview]
Message-ID: <852E4B7F-A64D-45AF-8FD3-9FD8F51D978B@lanl.gov> (raw)
In-Reply-To: <13426df10711010904r317f9fd6v14a87dc2f024b0b1@mail.gmail.com>
Leases are good for purposes other than caching, for example locking.
I don't see much difference if the protocol is going to define a
special filename or a new message. There are other small details that
need to be solved -- the server and the client need to be extra
careful that no events fall between the cracks (i.e. between a Rread
and the subsequent Tread on the special file).
On Nov 1, 2007, at 10:04 AM, ron minnich wrote:
> Why not just have a file that a client reads that lets the client know
> of changes to files.
>
> client opens this server-provided file ("changes"? "dnotify"?)
>
> Server agrees to send client info about all FIDS which client has
> active that are changing. Form of the message?
> fid[4]offset[8]len[4]
>
> It's up to the client to figure out what to do.
>
> if the client doesn't care, no extra server overhead.
>
> no new T*, no callbacks (which i can tell you are horrible when you
> get to bigger machines -- having an 'ls' take 30 minutes is no fun).
> No leases.
>
> The fact is we have loose consistency now, we just don't call it that.
> Anytime you are running a file from a server, you have loose
> consistency. It works ok in most cases.
>
> ron
next prev parent reply other threads:[~2007-11-01 16:16 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-31 18:40 Francisco J Ballesteros
2007-10-31 18:56 ` Eric Van Hensbergen
2007-10-31 19:13 ` Charles Forsyth
2007-10-31 19:33 ` Eric Van Hensbergen
2007-10-31 19:39 ` erik quanstrom
2007-10-31 20:43 ` geoff
2007-10-31 21:32 ` Charles Forsyth
2007-10-31 22:48 ` roger peppe
2007-10-31 23:35 ` erik quanstrom
2007-11-01 9:29 ` roger peppe
2007-11-01 11:03 ` Eric Van Hensbergen
2007-11-01 11:19 ` Charles Forsyth
2007-11-01 12:11 ` erik quanstrom
2007-10-31 19:42 ` erik quanstrom
2007-10-31 19:49 ` Eric Van Hensbergen
2007-10-31 20:03 ` erik quanstrom
2007-10-31 20:10 ` Latchesar Ionkov
2007-10-31 20:12 ` Eric Van Hensbergen
2007-10-31 20:17 ` Russ Cox
2007-10-31 20:29 ` Francisco J Ballesteros
2007-10-31 20:48 ` Charles Forsyth
2007-10-31 21:23 ` Francisco J Ballesteros
2007-10-31 21:40 ` Russ Cox
2007-10-31 22:11 ` Charles Forsyth
2007-10-31 22:26 ` Francisco J Ballesteros
2007-10-31 22:37 ` Charles Forsyth
2007-10-31 22:43 ` Francisco J Ballesteros
2007-10-31 23:32 ` Eric Van Hensbergen
2007-10-31 23:41 ` [V9fs-developer] " Charles Forsyth
[not found] ` <606b6f003ae9f0ed3e8c3c5f90ddc720@terzarima.net>
2007-11-01 1:13 ` Eric Van Hensbergen
2007-10-31 23:54 ` erik quanstrom
2007-11-01 0:03 ` Charles Forsyth
2007-11-01 1:25 ` Eric Van Hensbergen
2007-11-01 1:44 ` erik quanstrom
2007-11-01 2:15 ` Eric Van Hensbergen
2007-11-01 7:34 ` Skip Tavakkolian
2007-11-01 6:21 ` Bakul Shah
2007-11-01 14:28 ` Russ Cox
2007-11-01 14:38 ` erik quanstrom
2007-11-01 14:41 ` Charles Forsyth
2007-11-01 15:26 ` Sape Mullender
2007-11-01 15:51 ` Latchesar Ionkov
2007-11-01 16:04 ` ron minnich
2007-11-01 16:16 ` Latchesar Ionkov [this message]
2007-11-01 16:21 ` Sape Mullender
2007-11-01 16:58 ` Francisco J Ballesteros
2007-11-01 17:11 ` Charles Forsyth
2007-11-01 17:11 ` Francisco J Ballesteros
2007-11-01 17:13 ` Sape Mullender
2007-11-01 17:38 ` ron minnich
2007-11-01 17:56 ` Francisco J Ballesteros
2007-11-01 18:01 ` Francisco J Ballesteros
2007-11-01 18:52 ` Eric Van Hensbergen
2007-11-01 19:29 ` Francisco J Ballesteros
2007-11-01 23:24 ` ron minnich
2007-11-01 17:03 ` Russ Cox
2007-11-01 17:12 ` Sape Mullender
2007-11-01 17:35 ` erik quanstrom
2007-11-01 18:36 ` erik quanstrom
2007-11-01 17:13 ` Charles Forsyth
2007-11-01 17:16 ` Charles Forsyth
2007-11-01 17:20 ` Charles Forsyth
2007-11-01 17:52 ` Eric Van Hensbergen
2007-11-01 18:00 ` Latchesar Ionkov
2007-11-01 18:03 ` Francisco J Ballesteros
2007-11-01 18:08 ` Latchesar Ionkov
2007-11-01 18:16 ` erik quanstrom
2007-11-01 18:19 ` Francisco J Ballesteros
2007-11-01 18:35 ` Sape Mullender
2007-11-01 19:09 ` Charles Forsyth
2007-11-01 19:07 ` erik quanstrom
2007-11-01 17:14 ` Bakul Shah
2007-11-01 16:17 ` Sape Mullender
2007-11-01 16:27 ` Sape Mullender
2007-11-01 16:58 ` Sape Mullender
2007-11-01 16:59 ` Bakul Shah
2007-11-01 4:21 Brian L. Stuart
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