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From: Skip Tavakkolian <9nut@9netics.com>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] 9P optimization
Date: Sun, 24 Jun 2007 11:05:35 -0700	[thread overview]
Message-ID: <a601fbc7a328ed0deffc378490b78113@9netics.com> (raw)
In-Reply-To: <775b8d190706232116u43d53d7bl71d0267a1b246be3@mail.gmail.com>

> rangbooming has lead to extreme optimiazations.  i'll let skip
> comment on it (he's asleep i guess).  but i couldn't have much
> worse RTT (sydney-seattle), and the traffic seems a lot lower now,
> and the latency has improved extraordinarily.

behavior of windows exploder (rer) and network latency really magnify
this problem.  we cache the walks, assisted by staling and usage
tracking.  staling >1×rtt will satiate incessant walk requests from
cache.

it is useful for what we're doing.  brucee has an idea on how it could
be applied to something like exportfs, for general use.

regarding locks or cache expiry notification that others suggested,
the proposal in snspaper was to address that, but in the end we all
agreed that if you need it, a control file between the fileserver and
the importing side would be sufficient.



  reply	other threads:[~2007-06-24 18:05 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-19 20:11 [9fans] About 9P Philippe Anel
2007-06-20  0:37 ` Russ Cox
2007-06-20  2:06   ` Roman Shaposhnick
2007-06-20 11:29     ` Anthony Sorace
2007-06-22  0:32 ` Derek Fawcus
2007-06-22  6:58   ` Philippe Anel
2007-06-22 15:57     ` Derek Fawcus
2007-06-22 20:32       ` Philippe Anel
2007-06-22 21:10         ` David Leimbach
2007-06-22 21:35           ` Philippe Anel
2007-06-22 21:46             ` David Leimbach
2007-06-22 21:55               ` Philippe Anel
2007-06-22 22:25                 ` Philippe Anel
2007-06-22 22:57                   ` David Leimbach
2007-06-22 23:01                     ` Anant Narayanan
2007-06-23  4:30                   ` Russ Cox
2007-06-23  5:10                     ` Skip Tavakkolian
2007-06-23  9:25                       ` Francisco J Ballesteros
2007-06-23 15:50                         ` Martin Atkins
2007-06-23  6:24                     ` Philippe Anel
2007-06-23 15:00                     ` Rob Pike
2007-06-24  0:52                     ` [9fans] 9P optimization Lyndon Nerenberg
2007-06-24  3:04                       ` Francisco J Ballesteros
2007-06-24  3:15                         ` Lyndon Nerenberg
2007-06-24  4:08                           ` ron minnich
2007-06-24  9:34                             ` Steve Simon
2007-06-24 10:06                               ` Lyndon Nerenberg
2007-06-24 11:38                                 ` Steve Simon
2007-06-24 13:34                                   ` Lyndon Nerenberg
2007-06-25  0:34                                     ` ron minnich
2007-06-25 17:53                                       ` Lyndon Nerenberg
2007-06-25  1:02                                 ` Dave Eckhardt
2007-06-24 12:14                             ` erik quanstrom
2007-06-24 13:36                               ` Lyndon Nerenberg
2007-06-24 21:47                                 ` erik quanstrom
2007-06-25 17:48                                   ` Lyndon Nerenberg
2007-06-25 18:46                                     ` erik quanstrom
2007-06-24  4:16                           ` Bruce Ellis
2007-06-24 18:05                             ` Skip Tavakkolian [this message]
2007-06-22 23:20               ` [9fans] About 9P Skip Tavakkolian
2007-06-22 23:48                 ` Francisco J Ballesteros
2007-06-23  0:27                   ` Roman Shaposhnick
2007-06-23  0:27                     ` Francisco J Ballesteros
2007-06-23 12:08                   ` erik quanstrom
2007-06-23 12:27                     ` Francisco J Ballesteros
2007-06-23 12:57                     ` Lucio De Re
2007-06-23 13:01                     ` Uriel
2007-06-23 13:36                       ` Francisco J Ballesteros
2007-06-23 14:27                         ` Lucio De Re
2007-06-23 14:45                           ` Francisco J Ballesteros
2007-06-22 21:16         ` Skip Tavakkolian
2007-06-22 21:37           ` Philippe Anel

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