@Sylvain In a relatively untroubled cluster, even timed out writes go through, provided no messages are dropped. Which you can monitor on cassandra nodes. We have 100% consistency on our production servers as we don't see messages being dropped on our servers. Though as you mention, there would be no way to "repair" your dropped messages .
On Tue, Sep 25, 2012 at 6:57 PM, Sylvain Lebresne <sylv...@datastax.com> wrote: >> So general question, should I rely on Counters if I want 100% accuracy? > > > No. > > Even not considering potential bugs, counters being not idempotent, if you > get a TimeoutException during a write (which can happen even in relatively > normal conditions), you won't know if the increment went in or not (and you > have no way to know unless you have an external way to check the value). > This is probably fine if you use counters for say real-time analytics, but > not if you use 100% accuracy. > > -- > Sylvain
