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 > <javascript:_e(%7B%7D,'cvml','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 >> <javascript:_e(%7B%7D,'cvml','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 >>>> >>>> >
