[ale] rsync comparisons

[Robert Coggins]

Well, what I a seeing is the syncing of roughly 20GB taking over an hour
for just a few megs of differences.  It stays in the "building file
list..." for almost all of this time.  I am trying to find a way to
speed that up.

Rob

On 04/01/2010 11:37 AM, scott wrote:
> rsync compares on a file level BUT it compares timedate stamps/sizes
> in "quick mode" (which is default).  but if you want it to compare
> file to file, use "-c or --checksum" option.  Now this puts a heavier
> load on both systems, since it does a MD5 checksum on every file that
> has the same timedate stamp/size on both sides of the sync.  Now if
> you want to force the copy of the whole file instead of the changed
> blocks, use the --whole-file option with it.
> 
> I would use this ( -c & --whole-file) sparingly.  It is going to slow
> down the copies, put heavier loads on both ends and transfer more data
> (control data) back and forth.  I dont know your situation so I cant
> say to use it or or not.
> 
> scott
> 
> 
> On Thu, Apr 1, 2010 at 11:00 AM, Robert Coggins <ale at cogginsnet.com> wrote:
>> Is there a way to do file level comparisons and not block level
>> comparisons using rsync?
>>
>> Rob
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