On Sat, 2011-09-17 at 20:25 +0200, Maciej Marcin Piechotka wrote: > 1. Once the blank screen happened ot 23:00 UTC instead of 03:00 UTC > 2. I tried to disable the caches > 3. I tried to rsync via ext3 + btrfs-convert. I noticed something - in > old fs the df looked like: > > Data: total=30.01GB, used=28.42GB > System, DUP: total=8.00MB, used=4.00KB > System: total=4.00MB, used=0.00 > Metadata, DUP: total=1.00GB, used=199.47MB > Metadata: total=8.00MB, used=0.00 > > on new one (with ext3 image): > Data: total=33.33GB, used=20.52GB > System: total=32.00MB, used=4.00KB > Metadata: total=16.64GB, used=11.36GB > > and without: > Data: total=33.33GB, used=20.04GB > System: total=32.00MB, used=4.00KB > Metadata: total=16.64GB, used=10.88GB > > Given that lzo compression was used about 4 GB data difference was > expected (difference depending on mount options on rsynbc). However: > > 1. What is DUP? > 2. Why metadata is so big on convertion from ext3 while data is small > (the sum is about right - 31GB vs 28.5GB)? > That should be a) b) 4. I think it triggered a bug with data loss - the new data was not written to disk despite being visible from userspace after mount during the same mount. > Regards
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