Hi Christopher, in 2.0 gc_grace should be capped by TTL anyway: see CASSANDRA-4917
cheers, Christian On Wed, Sep 18, 2013 at 4:29 PM, Christopher Wirt <[email protected]>wrote: > I have a column family contains time series events, all columns have a 24 > hour TTL and gc_grace_seconds is currently 20 days. There is a TimeUUID in > part of the key.**** > > ** ** > > It takes 15 days to repair the entire ring.**** > > ** ** > > Consistency is not my main worry. Speed is. We currently write to this CF > at LOCAL_QUORUM and read at ONE.**** > > ** ** > > Is there any reason to have gc_grace_seconds higher than the TTL? Feels > like I’m just wasting resources all over given my consistency and speed > requirements. **** > > ** ** > > ** ** > > Second question.**** > > Does anyone vary their read repair ratio throughout the day.. i.e. at peak > turn off read repairs, turn to 0.7 for the grave yard shift.**** > > ** ** > > ** ** > > Cheers,**** > > Chris**** >
