Hello Jim, Tuesday, May 11, 2010, 12:33:04 PM, you wrote:
JF> On Tue, May 11, 2010 at 3:16 AM, Adam GROSZER <agros...@gmail.com> wrote: >> Hello Jim, >> >> Monday, May 10, 2010, 1:27:00 PM, you wrote: >> >> JF> On Sun, May 9, 2010 at 4:59 PM, Roel Bruggink <r...@fourdigits.nl> wrote: >>>> That's really interesting! Did you notice any issues performance wise, or >>>> didn't you check that yet? >> >> JF> I didn't check performance. I just iterated over a file storage file, >> JF> checking compressed and uncompressed pickle sizes. >> >> I'd say some checksum is then also needed to detect bit failures that >> mess up the compressed data. JF> Why? I think the gzip algo compresses to a bit-stream, where even one bit has an error the rest of the uncompressed data might be a total mess. If that one bit is relatively early in the stream it's fatal. Salvaging the data is not a joy either. I know at this level we should expect that the OS and any underlying infrastructure should provide error-free data or fail. Tho I've seen some magic situations where the file copied without error through a network, but at the end CRC check failed on it :-O -- Best regards, Adam GROSZER mailto:agros...@gmail.com -- Quote of the day: You may have to fight a battle more than once to win it. - Margaret Thatcher _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev