[Bug 9815] New: Compression tuning parameters
samba-bugs at samba.org
samba-bugs at samba.org
Thu Apr 18 13:29:17 MDT 2013
https://bugzilla.samba.org/show_bug.cgi?id=9815
Summary: Compression tuning parameters
Product: rsync
Version: 3.1.0
Platform: All
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P5
Component: core
AssignedTo: wayned at samba.org
ReportedBy: me at haravikk.com
QAContact: rsync-qa at samba.org
Okay, so it's great that rsync has built in compression that can be switched
off for known compressed file types, however there is still some extra control
that could be useful for tweaking when to compress files.
For example, in my case I know that all of the files over 750mb on my machine
are mostly movie files; obviously I can add file-extension for these, but there
are quite a lot of possible movie file wrappers, so it might be easier if I
could disable compression over a certain size, as this would also exclude
things like disk images that are probably compressed already and so-on.
Likewise a parameter for skipping compression on files below a certain level
could allow tuning for files that aren't likely to compress well enough to be
worth the effort.
On a somewhat related note, I think that --compress-level really needs more
detail, such as the default compression level, what the possible levels are,
and what the implications are. I believe rsync uses zlib which means values of
0 (none), 1 (fastest) to 9 (best) but is rsync's default the same as the zlib
default? Should it be? Which values give best mileage in common situations? I
dunno, just seems like some of these should be touched on in the man pages.
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