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Diffstat (limited to 'rsync.yo')
| -rw-r--r-- | rsync.yo | 15 |
1 files changed, 14 insertions, 1 deletions
@@ -1867,7 +1867,20 @@ being transmitted -- something that is useful over a slow connection. Note that this option typically achieves better compression ratios than can be achieved by using a compressing remote shell or a compressing transport because it takes advantage of the implicit information in the matching data -blocks that are not explicitly sent over the connection. +blocks that are not explicitly sent over the connection. This matching-data +compression comes at a cost of CPU, though, and can be disabled by repeating +the bf(-z) option, but only if both sides are at least version 3.1.1. + +Note that if your version of rsync was compiled with an external zlib (instead +of the zlib that comes packaged with rsync) then it will not support the +old-style compression, only the new-style (repeated-option) compression. In +the future this new-style compression will likely become the default. + +The client rsync requests new-style compression on the server via the +bf(--new-compress) option, so if you see that option rejected it means that +the server is not new enough to support bf(-zz). Rsync also accepts the +bf(--old-compress) option for a future time when new-style compression +becomes the default. See the bf(--skip-compress) option for the default list of file suffixes that will not be compressed. |