diff --git a/README.md b/README.md index e40aa3630..0f68c9058 100644 --- a/README.md +++ b/README.md @@ -44,19 +44,3 @@ be used only for testing purposes. This project is built on top of Dropwizard: http://dropwizard.io/ - -Clusters with closed cross DC JMX ports ---------------------------------------- - -For security reasons, it is possible that Reaper will be able to access only a single DC nodes through JMX (multi region clusters for example). -In the case where the JMX port is accessible (with or without authentication) from the running Reaper instance only to the nodes in the current DC, it is possible to have a multiple instances of Reaper running in different DCs. - -This setup works with Apache Cassandra as a backend only. It is unsuitable for memory, H2 and Postgres. - -Reaper instances will rely on lightweight transactions to get leadership on segments before processing them. -Reaper checks the number of pending compactions and actively running repairs on all replicas before processing a segment. The `datacenterAvailability` setting in the yaml file controls the behavior for metrics collection : - -* `datacenterAvailability: ALL` requires direct JMX access to all nodes across all datacenters. -* `datacenterAvailability: LOCAL` requires jmx access to all nodes in the datacenter local to reaper. -* `datacenterAvailability: EACH` means each datacenter requires at minimum one reaper instance which has jmx access to all nodes within that datacenter -