CODEWITHSUNDEEP
gemfire
Yash
Yash

Reputation: 1008

How does a server become part of a distributed system?

The GemFire tutorial shows that a locator is started with
gfsh>start locator --name=locator1 --port=55221

In some parts of the tutorial the command to start a server is shown as
gfsh>start server --name=server1 --J=-Dgemfire.jmx-manager=true --J=-Dgemfire.jmx-manager-start=true --J=-Dgemfire.http-port=8080

In this case, how does the server know the locator on which it will get registered?

Upvotes: 0

Views: 66

Answers (1)

Jens D
Jens D

Reputation: 4676

A server always joins a distributed system (DS) by connecting to a locator. [*]

If you start a locator from within gfsh and then, in the same session, start a server, gfsh will know to use the existing locator connection for the new server you are starting. In this case you don't need to explicitly provide a --locator option. This is also true when running gfsh with multiple start commands from a script. For example: gfsh -e "start locator --name=locator1 --port=19991" -e "start server --name=server1" -e "list members"

[*] Not true for versions of GemFire/Geode < 9.x as older versions can also join a DS using a multicast address/port combo. See the --mcast-port option in the docs. However that functionality is deprecated and will not be available in GemFire/Geode >= 9.x so it

Upvotes: 1

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