> The backups which is mentioned in the documentation, how do I define which node is the primary node and which node is the backup node.
You can either define your own affinity function or use RendezvousAffinityFunction and set a backup filter using setAffinityBackupFilter <https://ignite.apache.org/releases/latest/javadoc/org/apache/ignite/cache/affinity/rendezvous/RendezvousAffinityFunction.html#setAffinityBackupFilter(org.apache.ignite.lang.IgniteBiPredicate)> method. Here you can find a use-case for it: https://www.youtube.com/watch?time_continue=801&v=u8BFLDfOdy8. пн, 4 сент. 2017 г. в 20:48, ezhuravlev <e.zhuravlev...@gmail.com>: > >The backups which is mentioned in the documentation, how do I define which > node is the primary node and >which node is the backup node. > > It defined by Affinity Function, you can read about it here: > > https://apacheignite.readme.io/docs/affinity-collocation#section-affinity-function > > >I will have a four node cluster in two data centers , is it normal to > think > each data center would have one >primary node and one backup node. What > would happen in the scenario that the primary node on one dc >cannot reach > the primary node on the other dc? > > I think that you not fully understand how partitioned caches work. Node can > be primary for the part of the partitions, while other nodes will have > other > parts as primary. Here is basic information about Partitioned cache that > should be enough to start: > https://apacheignite.readme.io/docs/cache-modes#section-partitioned-mode > > >I assume that org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi is to be > used for the dsicoverySpi property >even for Partitioned Caches. Are there > special properties that should be filled in for the partitioned cache > >except for addresses and ports? > > discoverySpi doesn't affect caches at all, so, you don't need to change > anything at org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi > configuration > > >Most of the caches I am using is using uuid as keys , in that case how > would affinity collocation of the keys >work? Unfortunately I cannot change > the key structure in a short notice. > > Do you want to collocate Data with Data or Compute with Data? In both cases > you can find information on this page: > https://apacheignite.readme.io/docs/affinity-collocation > > > Evgenii > > > > > -- > Sent from: http://apache-ignite-users.70518.x6.nabble.com/ >
