linux-kernel - Re: [RFC] Rollback FS

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Date:	Sun, 20 Oct 2013 15:07:02 +0200
From:	Levente Kurusa <levex@...ux.com>
To:	jiaweiwei <jiaweiwei.xiyou@...il.com>,
	Theodore Ts'o <tytso@....edu>,
	Vyacheslav Dubeyko <slava@...eyko.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Harry Wei <harryxiyou@...il.com>
Subject: Re: [RFC] Rollback FS

2013-10-20 14:59 keltezéssel, jiaweiwei írta:
> On Sun, Oct 20, 2013 at 8:35 PM, Theodore Ts'o <tytso@....edu> wrote:
>> On Sun, Oct 20, 2013 at 07:37:01PM +0800, jiaweiwei wrote:
>>>
>>> Any file system should rollback but not specific ones. Therefore, a
>>> VFS like mechanism should be designed and implemented.
>>
>> And what if the blocks or inodes used for the files that were deleted
>> have already been used and overwritten?
> 
> A good catch. Following ideas would be suitable.
> 
> 1, Keep the blocks or inodes by a parameter we give.
> 2, Keep the blocks or inodes for several seconds.
Keep them where? On the HDD? We just deleted/moved that.
In memory? How about a 4+ GB file(s)?
> 
>>
>>> Maybe, I would give detail design, thanks.
>>
>> I encourage you to try to do that; you might find it to be an
>> educational exercise.
>>
> 
> Yeah, I would, thanks.
> 
> 

I think he meant to be ironic.

-- 
Regards,
Levente Kurusa
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