Hi,
how does rsync work if it compares two very huge files on two distinct hosts (rsync uses a networked connection, via SSH)? Some observation seems to indicate, that rsync first reads (and checksums?) the remote (destination) side, then, if finished, it reads (and checksums?) the local (source) side and then starts transferring the delta if done with the comparison of these two files on both sides. The major problem (with respect to runtime) seems to be the missing parellism in read (and checksumming) the source and the destination. 1) Is this observation right? 1a) Does it depend on the rsync version? 2) Is there a way to get read (and checksumming) of both sides in parallel? Best regards from Dresden/Germany Viele Grüße aus Dresden Heiko Schlittermann -- SCHLITTERMANN.de ---------------------------- internet & unix support - Heiko Schlittermann, Dipl.-Ing. (TU) - {fon,fax}: +49.351.802998{1,3} - gnupg encrypted messages are welcome --------------- key ID: F69376CE - ! key id 7CBF764A and 972EAC9F are revoked since 2015-01 ------------ -
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