Hi, Could someone help me with a clarification whether the btrfs-convert tool creates checksums on blocks of the existing ext[234] filesystem? Any experiences how the size and the filesystem utilization (used vs. total diskspace) impacts the time of conversion? Thanks, Gábor -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Jan 04, 2012 at 03:22:11PM +0100, pubny wrote:> Could someone help me with a clarification whether the btrfs-convert > tool creates checksums on blocks of the existing ext[234] filesystem?yes, it does checksum by default and you can switch it off with the ''-d'' option.> Any experiences how the size and the filesystem utilization (used vs. > total diskspace) impacts the time of conversion?I don''t have numbers but it needs to go through extX metadata, read and checksum data blocks, then write btrfs metadata. Nothing where a significant time could be saved (except switching off the checksums). david -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Thanks David. That''s very helpful. Regards, Gábor -----Original Message----- From: David Sterba <dave@jikos.cz> Reply-to: dave@jikos.cz To: pubny <pubny@xs4all.nl> Cc: linux-btrfs@vger.kernel.org Subject: Re: checkums when converting from ext[234] to Btrfs Date: Thu, 5 Jan 2012 16:45:41 +0100 Mailer: Mutt/1.4.2.2i On Wed, Jan 04, 2012 at 03:22:11PM +0100, pubny wrote:> Could someone help me with a clarification whether the btrfs-convert > tool creates checksums on blocks of the existing ext[234] filesystem?yes, it does checksum by default and you can switch it off with the ''-d'' option.> Any experiences how the size and the filesystem utilization (used vs. > total diskspace) impacts the time of conversion?I don''t have numbers but it needs to go through extX metadata, read and checksum data blocks, then write btrfs metadata. Nothing where a significant time could be saved (except switching off the checksums). david -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html