>From the architecture section of wiki. And it makes sense! More specifically: R=read replica count W=write replica count N=replication factor Q=*QUORUM* (Q = N / 2 + 1)
- If W + R > N, you will have consistency - W=1, R=N - W=N, R=1 - W=Q, R=Q where Q = N / 2 + 1 On Thu, Feb 3, 2011 at 3:39 PM, Yang <teddyyyy...@gmail.com> wrote: > the pdf at the design doc > > https://issues.apache.org/jira/secure/attachment/12459754/Partitionedcountersdesigndoc.pdf > > does say so: > page 2 "- strongly consistent read: requires consistency level ALL. > (QUORUM is insufficient.) > " > > but the wiki http://wiki.apache.org/cassandra/Counters > gave a code example: > > rv = client.get_counter('key1', ColumnPath(column_family='Counter1', > column='c1'), ConsistencyLevel.ONE) > > > is one of them wrong? > > Thanks > Yang >
