Licensing distributed DB2 10.5 servers in a high availability (HA) environment

DB2 Advanced Workgroup and DB2 Advanced Enterprise have terabyte (TB) licensing options. These versions include a scripting tool to help you calculate the number of tuberculosis licenses required for each database. For hot standby servers (including alternate server reads), the number of required TB licenses is equal to the number of licenses required for the primary server. For hot standby servers, TB licenses are required for each database on the server. Cold standby server does not require a license

Since the DB2 10.5 Fix Pack, the HADR feature comes with a TB license, but the DB2 Advanced release includes the same Q replication features that you can use to set up alternative environments. If the server in Figure 4 uses homogeneous Q replication instead of HADR, you can use a license using TB metrics. Data server A and data server B require the same number of TB licenses.

If the server in Figure 6 uses homogeneous Q replication instead of HADR and the database is 5 TB, Data Server 2 requires an 8 TB license, but Data Server 1 only requires 1 TB license. If Data Server 2 has a second database of 5 TB, Data Server 2 requires a 13 TB license, but Data Server 1 requires a 2 TB license.

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DB2 Advanced Workgroup and DB2 Advanced Enterprise have terabyte (TB) licensing options. These versions include a scripting tool to help you calculate the number of tuberculosis licenses required for each database. For hot standby servers (including alternate server reads), the number of required TB licenses is equal to the number of licenses required for the primary server. For hot standby servers, TB licenses are required for each database on the server. Cold standby server does not require a license

HAProxy is a free, fast, reliable solution for high availability, load balancing, and proxy for TCP and HTTP based applications. Its most common use is to improve the performance and reliability of the server environment by distributing the workload across multiple servers (Web, applications, databases, etc.). RabbitMQ is a complete and reliable enterprise messaging system based on emerging AMQP standards. RabbitMQ is a message broker. The main idea is to accept and forward the message. It can be thought of as a post office: when we send an e-mail to a mailbox we are pretty sure that the postman will eventually send a message to our recipient. Using this metaphor RabbitMQ is a mailbox, post office and postal delivery.