* checkums when converting from ext[234] to Btrfs [not found] <1325157169.28566.21.camel@lupus> @ 2012-01-04 14:22 ` pubny 2012-01-05 15:45 ` David Sterba 0 siblings, 1 reply; 3+ messages in thread From: pubny @ 2012-01-04 14:22 UTC (permalink / raw) To: linux-btrfs 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, G=C3=A1bor -- 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: checkums when converting from ext[234] to Btrfs 2012-01-04 14:22 ` checkums when converting from ext[234] to Btrfs pubny @ 2012-01-05 15:45 ` David Sterba 2012-01-05 19:48 ` pubny 0 siblings, 1 reply; 3+ messages in thread From: David Sterba @ 2012-01-05 15:45 UTC (permalink / raw) To: pubny; +Cc: linux-btrfs 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: checkums when converting from ext[234] to Btrfs 2012-01-05 15:45 ` David Sterba @ 2012-01-05 19:48 ` pubny 0 siblings, 0 replies; 3+ messages in thread From: pubny @ 2012-01-05 19:48 UTC (permalink / raw) To: dave; +Cc: linux-btrfs Thanks David. That's very helpful. Regards, G=C3=A1bor -----Original Message----- =46rom: 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
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2012-01-04 14:22 ` checkums when converting from ext[234] to Btrfs pubny
2012-01-05 15:45 ` David Sterba
2012-01-05 19:48 ` pubny
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