On 2019-02-13 10:47 a.m., Delian Krustev via rsync wrote: > > > Free space at the beginning and end of the backup: > Filesystem 1M-blocks Used Available Use% Mounted on > /dev/mapper/bkp 102392 76872 20400 80% /mnt/bkp > /dev/mapper/bkp 102392 78768 18504 81% /mnt/bkp > > #################################################### > > As can be seen "rsync" has sent about 20M and received 300K of data. However > the filesystem has allocated almost 2G, which is the total size of the files > being backed up. > > The filesystem mounted on "/mnt/bkp" is of type "nilfs2", which is a log > structured filesystem. I'm using its snapshotting feature to keep backups for > past dates.
Have you run the nifs-clean before checking this free space comparison? Maybe there is just large amplification created by Rsyn's many small writes when using --inplace.
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