How to speed up rsync/tar of large Maildir
- by psusi
I have a very large Maildir I am copying to a new machine ( over 100 BaseT ) with rsync.  The progress is slow.  VERY SLOW.  Like 1 MB/s slow.  I think this is because it is a lot of small files that are being read in an order that essentially is random with respect to where the blocks are stored on disk, causing a massive seek storm.  I get similar results when trying to tar the directory.  Is there a way to get rsync/tar to read in disk block order, or otherwise overcome this problem?