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General Questions • Re: Ssh very slow to copy .mozilla or .thunderbird

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I noticed something strange when using verbose > file. According to the manual:

Code:

Rsync finds files that need to be transferred using a "quick check"  al‐       gorithm  (by  default) that looks for files that have changed in size or       in last-modified time.  Any changes in the  other  preserved  attributes       (as requested by options) are made on the destination file directly when       the  quick  check indicates that the file's data does not need to be up‐       dated.
In the file that recorded the verbose output, I saw this:

Code:

calling match_sums .mozilla/firefox/all2y1bx.D1/storage/default/moz-extension+++eeb1fe6f-cf1e-4bee-b8dc-43b9b9ae35e2/idb/1671402671ueBglaorcokt0SCeahc.files/12027firefox/all2y1bx.D1/storage/default/moz-extension+++eeb1fe6f-cf1e-4bee-b8dc-43b9b9ae35e2/idb/1671402671ueBglaorcokt0SCeahc.files/12027sending file_sum
It appears that rsync performs an additional step beyond the two standard checks: it performs a checksum step. In the config file we can read about "checksum":

Code:

~$ less /usr/share/doc/rsync/examples/rsyncd.conf ..........refuse options = checksum dry-run
Since we're talking about a “dry run,” I don't think this will be a problem. Could the checksum cause a significant delay? Could I check this by adding a line to the configuration file, such as “checksum = no”?

PS1: /usr/share/doc/rsync/examples/rsyncd.conf: "examples"? Is it the actual rsync config file? The manual states:

Code:

rsyncd.conf - configuration file for rsync in daemon mode
Am I in a daemon mode????

PS2: At this point, rsync freezes:

Code:

calling match_sums .mozilla/firefox/<profile>/storage/default/moz-extension+++eeb1fe6f-cf1e-4bee-b8dc-43b9b9ae35e2/idb/1671402671ueBglaorcokt0SCeahc.files/8176firefox/<profile>/storage/default/moz-extension+++eeb1fe6f-cf1e-4bee-b8dc-43b9b9ae35e2/idb/1671402671ueBglaorcokt0SCeahc.files/8176  ----> freeze

Statistics: Posted by mazda1 — 2026-01-04 09:08



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