linux-ext4 - Re: Copying Data Blocks

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Message-ID: <2d08ef090901060845t85ac2b0i11c684a09d930608@mail.gmail.com>
Date:	Tue, 6 Jan 2009 22:15:33 +0530
From:	"Rohit Sharma" <imreckless@...il.com>
To:	"rishi agrawal" <postrishi@...il.com>
Cc:	"Manish Katiyar" <mkatiyar@...il.com>,
	ext4 <linux-ext4@...r.kernel.org>,
	Kernelnewbies <kernelnewbies@...linux.org>
Subject: Re: Copying Data Blocks

On Tue, Jan 6, 2009 at 7:42 PM, rishi agrawal <postrishi@...il.com> wrote:
> yes i suppose the donor inode is known
> moreover the receiver inode's number is also known
>
> On Tue, Jan 6, 2009 at 6:54 PM, Manish Katiyar <mkatiyar@...il.com> wrote:
>>
>> On Tue, Jan 6, 2009 at 4:06 PM, Rohit Sharma <imreckless@...il.com> wrote:
>> > I want to read data blocks from one inode
>> > and copy it to other inode.
>> >
>> > I mean to copy data from data blocks associated with one inode
>> > to the data blocks associated with other inode.
>>
>> Copying 4K chunk of data itself is a costly operation. and depending

Yes its a costly operation, but if this can be done then
we can definitely copy n blocks at a time.

>> on the size of your donor inode this can be huge . Why do you want to
>> do that ? Do you know the inode of the donor inode ?

For physically relocating a file from one disk to other.

Yes Manish, i know the donor inode and i will create the reciever inode.

Can we do that in kernel space.?
>>
>> thanks -
>> Manish
>> >
>> > Is that possible in kernel space.?
>> > --
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>
>
>
> --
> Regards,
> Rishi B. Agrawal
>
>
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