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From: Liu Bo <bo.li.liu@oracle.com>
To: Tomasz Chmielewski <tch@virtall.com>
Cc: linux-btrfs@vger.kernel.org
Subject: Re: converting lzo compression to zlib compression?
Date: Mon, 17 Jun 2013 10:11:25 +0800	[thread overview]
Message-ID: <20130617021124.GA30460@localhost.localdomain> (raw)
In-Reply-To: <20130617021653.4718a5e0@virtall.com>

On Mon, Jun 17, 2013 at 02:16:53AM +0900, Tomasz Chmielewski wrote:
> I have a btrfs filesystem mounted with "compress=lzo" now.
> 
> I'd like to see how much space would I save by converting it to zlib.
> 
> 
> Would it be possible to convert lzo compression to zlib compression
> with the following:
> 
> - mount the filesystem with "compress=zlib"
> - run balance
> - when balance finishes, the data would be compressed with zlib
> 
> Would this work as above, or do I have to copy the data out and back to
> convert from lzo compression to zlib compression?

Hi,

I'm afraid the above won't work, cause balance is not aware of the
compression so that it won't decompress the data.

thanks,
liubo

> 
> 
> -- 
> Tomasz Chmielewski
> http://wpkg.org
> 
> 
> --
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  reply	other threads:[~2013-06-17  2:11 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-06-16 17:16 converting lzo compression to zlib compression? Tomasz Chmielewski
2013-06-17  2:11 ` Liu Bo [this message]
2013-06-17 15:16 ` David Sterba

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