Understanding Rsync Backup Statistics
LBackup uses rsync for the transfer of files over the network and also for local backups. The '–stats' option is passed to rsync and this results in various statistics of the data transfer being displayed within the LBackup logs each time a backup complets successfully.
Below is a snippet from the LBackup man page regarding the definition of various statistics from which rsync reports on after each successful execution of LBackup.
This tells rsync to print a verbose set of statistics on the
file transfer, allowing you to tell how effective rsync's delta-
transfer algorithm is for your data.
The current statistics are as follows:
o Number of files is the count of all "files" (in the
generic sense), which includes directories, symlinks,
etc.
o Number of files transferred is the count of normal files
that were updated via rsync's delta-transfer algorithm,
which does not include created dirs, symlinks, etc.
o Total file size is the total sum of all file sizes in the
transfer. This does not count any size for directories
or special files, but does include the size of symlinks.
o Total transferred file size is the total sum of all files
sizes for just the transferred files.
o Literal data is how much unmatched file-update data we
had to send to the receiver for it to recreate the
updated files.
o Matched data is how much data the receiver got locally
when recreating the updated files.
o File list size is how big the file-list data was when the
sender sent it to the receiver. This is smaller than the
in-memory size for the file list due to some compressing
of duplicated data when rsync sends the list.
o File list generation time is the number of seconds that
the sender spent creating the file list. This requires a
modern rsync on the sending side for this to be present.
o File list transfer time is the number of seconds that the
sender spent sending the file list to the receiver.
o Total bytes sent is the count of all the bytes that rsync
sent from the client side to the server side.
o Total bytes received is the count of all non-message
bytes that rsync received by the client side from the
server side. "Non-message" bytes means that we don't
count the bytes for a verbose message that the server
sent to us, which makes the stats more consistent.