On 06/19/2012 09:43 AM, Orit Wasserman wrote: > Signed-off-by: Orit Wasserman <owass...@redhat.com> > --- > docs/xbzrle.txt | 115 > +++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 1 files changed, 115 insertions(+), 0 deletions(-) > create mode 100644 docs/xbzrle.txt >
> +Format > +======= > + > +The compression format preforms a XOR between the previous and current > content > +of the page, where zero represents an unchanged value. > +The page data delta is represented by zero and non zero runs. > +A zero run is represented by it's length (in bytes). s/it's/its/ (it's always means "it is"; the possessive form has no apostrophe) > +A non zero run is represented by it's length (in bytes) and the data. s/it's/its/ > +cache-miss: the number of cache misses to date - high cache-miss rate > +indicates that the cache size is set too low. > +overflow: the number of overflows in the decoding which where the delta could > +not be compressed. This can happen if the changes in the pages are too large > +or there are many short changes for example change every second byte (half a s/changes for example change/changes; for example, changing/ -- Eric Blake ebl...@redhat.com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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