linux-ext4 - Re: [PATCH v1 00/30] Ext4 snapshots

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Message-ID: <BANLkTinU9Hegr3iA5it2vNjE_RYbB+8+RQ@mail.gmail.com>
Date:	Thu, 9 Jun 2011 06:18:10 +0300
From:	"Amir G." <amir73il@...rs.sourceforge.net>
To:	Yongqiang Yang <xiaoqiangnk@...il.com>
Cc:	Lukas Czerner <lczerner@...hat.com>, linux-ext4@...r.kernel.org,
	tytso@....edu, linux-kernel@...r.kernel.org, sandeen@...hat.com
Subject: Re: [PATCH v1 00/30] Ext4 snapshots

On Thu, Jun 9, 2011 at 4:59 AM, Yongqiang Yang <xiaoqiangnk@...il.com> wrote:
>> But I do understand the difference. And also, when it comes to fs level
>> snapshotting I would suspect that it would do something we can not do
>> with the current solutions, for example per-file or per-directory snapshots,
>> cat ext4 snapshots do that ?
> Hi Lukas,
>
> I noticed that there is no answer to this question in the thread.  I

I think I answered this question with No it can't ;-)

> can give the question the answer that ext4 can snapshot per-file or
> per-directory, and can exclude some files or directories from being
> snapshotted.
>

So the full answer is that ext4 snapshot CAN exclude
certain files/dirs from snapshot, but this feature is not fully implemented yet
(I have it in a dev branch)

> --
> Best Wishes
> Yongqiang Yang
>
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