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From Jørgen Løland (JIRA) <j...@apache.org>
Subject [jira] Commented: (DERBY-2977) Replication: Add a ReplicationMaster controller that will manage replication on the master side
Date Wed, 29 Aug 2007 09:47:30 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2977?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12523522
] 

Jørgen Løland commented on DERBY-2977:
--------------------------------------

I plan to implement the ReplicationMaster Controller incrementally in multiple steps:

1) Add the basic code to Derby so that the master controller can be booted as a service when
a "startmaster" command is issued to NetworkServerControl
2-n) Incrementally add controller logic as replication patches are added to Derby.

The current plan for step 1 is:
* NetworkServerControl will lookup the correct database, and call a startReplicationMaster
method on that database service. This call will propagate through the database and access
layers to RawStore.java.
* RawStore#startReplicationMaster will call Monitor#bootServiceModule on the MasterFactory
(interface for MasterController)
* When booted, the MasterController service will initialize some basic variables but do nothing
fancy.

Comments are appreciated.

> Replication: Add a ReplicationMaster controller that will manage replication on the master
side
> -----------------------------------------------------------------------------------------------
>
>                 Key: DERBY-2977
>                 URL: https://issues.apache.org/jira/browse/DERBY-2977
>             Project: Derby
>          Issue Type: Sub-task
>          Components: Services
>    Affects Versions: 10.4.0.0
>            Reporter: Jørgen Løland
>            Assignee: Jørgen Løland
>
> The replication master role includes many tasks:
> * set up a network connection to the slave
> * sending the database to the slave before starting replication
> * make sure that log records are appended to the network buffer, and that the log is
later sent to the slave
> * etc
> This issue is for adding a controller that will start/stop/initiate all services needed
for the replication master role.

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