MultiSite w/GemFire

A simple example implementation of GemFire’s multi-site WAN topology, which can be run on a local machine, primarily for learning purposes.

Configuration

Site 1:

1 Locator (default port), 2 Servers, with Gateway Senders

Site 2:

1 Locator, 2 Servers, with Gateway Receivers

Steps

1. Install Gradle

2. Start first site’s cluster:

   cd site1
   ./start.sh

3. In a separate console, start second site’s cluster:

   cd site2
   ./start.sh

4. At this point you have the definition of one region: Customer on both clusters. You can log in to each cluster using gfsh, connect, and verify that the region exists, and can also list gateways.

   On "site1":

   gfsh
   connect
   list members
   list regions
   list gateways

   On "site2":

   gfsh
   connect --locator=localhost[20334]
   list members
   list regions
   list gateways

5. Verify there’s no data in the region (on both clusters), with:

   query --query="select * from /Customer"

6. On site2, a CacheListener is attached to the Customer region to log the event when a cache entry is created, updated, or deleted. So, in separate consoles, tail the server logs for site 2:

   tail -f site2/server1/server1.log
   tail -f site2/server2/server2.log

7. Run a client to load a Customer object into the first cluster, and watch the cache listener on site2 notify you that it received a copy:

   cd client
   gradle dataload