On Sat, Feb 11, 2017 at 10:54 AM, Jonathan Haddad <j...@jonhaddad.com> wrote:
> The odds of only using a sha1 as your partition key for every table you > ever create is low. You will regret BOP until the end of time. > On Sat, Feb 11, 2017 at 5:53 AM Edward Capriolo <edlinuxg...@gmail.com> > wrote: > >> Probably best to avoid bop even if you are aflready hashing keys >> yourself. What do you do when checksuma collide? It is possible right? >> >> On Saturday, February 11, 2017, Micha <mich...@fantasymail.de> wrote: >> >> Hi, >> >> my table has a sha-1 sum as partition key. Would in this case the >> ByteOrdered partitioner be a better choice than the Murmur3partitioner, >> since the keys are quite random? >> >> >> cheers, >> Michael >> >> >> >> -- >> Sorry this was sent from mobile. Will do less grammar and spell check >> than usual. >> > Yes, the odds are low. https://en.wikipedia.org/wiki/Birthday_problem This has already been addressed for RP: https://issues.apache.org/jira/browse/CASSANDRA-1034 If you wanted to BOP and hash yourself you would have to make your primary key something like (shavalue,actualvalue) to ensure two keys do not overwrite each other.
