If you're going to use xz then you wouldn't
even have to recompress the
blocks that haven't changed and are already well compressed.
On Tue, Jan 21, 2014 at 5:26 PM, Randall Farmer <randall(a)wawd.com> wrote:
Ack, sorry for the (no subject); again in the
right thread:
For external uses like XML dumps integrating the
compression
strategy into LZMA would however be very attractive. This would also
benefit other users of LZMA compression like HBase.
For dumps or other uses, 7za -mx=3 / xz -3 is your best bet.
That has a 4 MB buffer, compression ratios within 15-25% of
current 7zip (or histzip), and goes at 30MB/s on my box,
which is still 8x faster than the status quo (going by a 1GB
benchmark).
Trying to get quick-and-dirty long-range matching into LZMA isn't
feasible for me personally and there may be inherent technical
difficulties. Still, I left a note on the 7-Zip boards as folks
suggested; feel free to add anything there:
https://sourceforge.net/p/sevenzip/discussion/45797/thread/73ed3ad7/
Thanks for the reply,
Randall
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