basti (12020-10-22): > I try to backup my imap folder (140 GB in 1 000 000 files). > I use rsnapshot on a mounted nfs share. > > The initial sync transfer in 1 hour only 2 GB. > Iotop on the destination show 512kb/s. > > Network between source and destination is 1 GBit. > > Is the a way to speedup rsync? Yes: do not use it over NFS, use it over SSH. rsync has a clever algorithm to transfer only the parts of a file that changed. But for that, it needs fast access to both the source and destination file, i.e. it needs to run locally on both hosts. Apart from that, these rates are very low. I suggest you test them with simpler tasks: reading a big file, writing a big file, reading many small files, writing many small files. A tarball to or from a tmpfs should allow to test only the NFS part. Regards, -- Nicolas George
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