Perhaps a variation on https://issues.apache.org/jira/browse/CASSANDRA-9753?
You could try setting speculative retry to 0 to avoid cross-dc reads. On Wed, Sep 9, 2015 at 7:55 AM, Eric Plowe <eric.pl...@gmail.com> wrote: > read_repair_chance: 0 > dclocal_read_repair_chance: 0.1 > > > On Wednesday, September 9, 2015, Laing, Michael <michael.la...@nytimes.com> > wrote: > >> What are your read repair settings? >> >> On Tue, Sep 8, 2015 at 9:28 PM, Eric Plowe <eric.pl...@gmail.com> wrote: >> >>> To further expand. We have two data centers, Miami and Dallas. Dallas is >>> our disaster recovery data center. The cluster has 12 nodes, 6 in Miami and >>> 6 in Dallas. The servers in Miami only read/write to Miami using data >>> center aware load balancing policy of the driver. We have the problem when >>> writing and reading to the Miami cluster with LOCAL_QUORUM. >>> >>> Regards, >>> >>> Eric >>> >>> On Tuesday, September 8, 2015, Eric Plowe <eric.pl...@gmail.com> wrote: >>> >>>> Rob, >>>> >>>> All writes/reads are happening from DC1. DC2 is a backup. The web app >>>> does not handle live requests from DC2. >>>> >>>> Regards, >>>> >>>> Eric Plowe >>>> >>>> On Tuesday, September 8, 2015, Robert Coli <rc...@eventbrite.com> >>>> wrote: >>>> >>>>> On Tue, Sep 8, 2015 at 4:40 PM, Eric Plowe <eric.pl...@gmail.com> >>>>> wrote: >>>>> >>>>>> I'm using Cassandra as a storage mechanism for session state >>>>>> persistence for an ASP.NET web application. I am seeing issues where >>>>>> the session state is persisted on one page (setting a value: >>>>>> Session["key"] >>>>>> = "value" and when it redirects to another (from a post back event) and >>>>>> check for the existence of the value that was set, it doesn't exist. >>>>>> >>>>>> It's a 12 node cluster with 2 data centers (6 and 6) running 2.1.9. >>>>>> The key space that the column family lives has a RF of 3 for each >>>>>> data center. The session state provider is using the the datastax csharp >>>>>> driver v2.1.6. Writes and reads are at LOCAL_QUORUM. >>>>>> >>>>> >>>>> 1) Write to DC_A with LOCAL_QUORUM >>>>> 2) Replication to DC_B takes longer than it takes to... >>>>> 3) Read from DC_B with LOCAL_QUORUM, do not see the write from 1) >>>>> >>>>> If you want to be able to read your writes from DC_A in DC_B, you're >>>>> going to need to use EACH_QUORUM. >>>>> >>>>> =Rob >>>>> >>>>> >>
