activemq broker

consumer message.Metadata StoreThe metadata for messages in the message log is saved in the Db.data file, and is stored in the b-tree structure, and the data is updated periodically from the metadata cache. Some information that exists in the message log is also backed up in the Metadata store, which allows the broker instance to start quickly.Even if the metadata store file is corrupted or deleted by mistake. The

1, high availability of data in several ways ①shared Nothing master/slave Master and Slave each individually store persistent messages that do not share data. ②shared Database Master/slave The data between master and slave is shared. ③shared File System Master/slave This approach is essentially the same as the shared database storage principle. ④replicated leveldb Store This way uses zookeeper to elect master. To conduct an election, a majority of "participants" are required.

When running multiple brokers or stand alone brokers in a network, there is a problem. This means that a message is physically held by only one broker, so when a broker fails, then you can only wait until the broker restarts before messages on the broker can be sent continuously (If persistence is not set, messages wil

An Issue of Oracle distributed uard Broker has been studying how to build Data Guard with a Broker. It has been a good job in the past. A strange problem was suddenly found in the past two days, the configuration process is correct, but the following error message is displayed: DGMGRL> show configuration; Configuration Name: dgmgrl_1 Enabled: YES Protection Mode: maxPerformance Fast-Start Failover: DISABLED

Enabling Service Broker The following T-SQL enables or disabled service broker on sqlserver 2005. The service broker is required by. Net for sqlcachedependency support -- Enable service broker: Alter Database [ Database Name] Set Enable_broker; -- Disable Service Broker:

Ervice broker implements a complete set of publish-subscribe solutions, in which author sends the service broker message (also known as article) to the publisher (publisher ). The publisher is responsible for distributing messages to different subscribers (subscriber ). Each subscriber accepts specific messages through subscription. Describes this publish-subscribe solution:The following describes how to im

Activemq-web-console is used by default by importing jetty. XML in activemq. XML to configure a jetty server. In fact, activemq-web-console can be deployed separately from activemq-broker. Two deployment methods: 1. Directly deploy apache-

ActiveMQ Persistence Configuration Modify configuration file Activemq.xml Modify Persistenceadapter The following section is configured to comment out Then update to the following configuration: To define a data source bean Outside of the broker node, the definition ID is mysql-ds bean, as follows: Creating Data Create a database in MySQL named Activemq