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From: "Xin Zhao" <uszhaoxin@gmail.com>
To: linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>
Subject: how do versioning filesystems take snapshot of opened files?
Date: Tue, 3 Jul 2007 01:28:57 -0400	[thread overview]
Message-ID: <4ae3c140707022228u2b5098c5v766b9dc9a7e09ea1@mail.gmail.com> (raw)

Hi,


If a file is already opened when snapshot command is issued,  the file
itself could be in an inconsistent state already. Before the file is
closed, maybe part of the file contains old data, the rest contains
new data.
How does a versioning filesystem guarantee that the file snapshot is
in a consistent state in this case?

I googled it but didn't find any answer. Can someone explain it a little bit?

Thanks

             reply	other threads:[~2007-07-03  5:28 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-03  5:28 Xin Zhao [this message]
     [not found] ` <778391c50707022236v5157a933qea1994cf4cbce879@mail.gmail.com>
2007-07-03  5:44   ` how do versioning filesystems take snapshot of opened files? Xin Zhao
2007-07-03 13:09 ` Chris Mason
2007-07-03 16:12   ` Xin Zhao
2007-07-03 16:35     ` Bryan Henderson
2007-07-03 16:24   ` Bryan Henderson
2007-07-03 16:31     ` Xin Zhao
2007-07-03 17:04       ` Chris Mason
2007-07-03 17:15         ` Xin Zhao
2007-07-03 17:38           ` Chris Mason
2007-07-03 21:06             ` Bryan Henderson
2007-07-03 21:17               ` Xin Zhao
2007-07-03 22:02   ` Neil Brown

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