On 16 November 2010 15:37, Robert Collins <[email protected]> wrote: > Gary and I are attending a course on Cassandra, which several teams in > Canonical are evaluating for use.
Thanks for the update. > Counting - assigning numbers based on data in the database - is > tricky, and there are a few techniques to do it. Running a counting > service - a single point of failure that manages a lock and can issue > numbers - is something we'd probably need to do to allocate bugids, > were we to migrate to Cassandra. I'm curious just what this means: * you can't get an acid view across the database therefore you can't say "there are 700,000 bugs so I'm making 700,001"? * even just getting an approximate count is expensive? I guess bug ids are user visible as being medium-size consecutive integers, but presumably for any new objects one would want to use uuid-like identifiers. -- Martin _______________________________________________ Mailing list: https://launchpad.net/~launchpad-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~launchpad-dev More help : https://help.launchpad.net/ListHelp
