This chapter provides information about the Cluster Database (Oracle Real Application Clusters (RAC) database) metrics.
Do you need to shard your database to meet growing volumes of write (UPDATE, INSERT, DELETE) operations? Do you need to ensure results from SELECT operations are consistent, regardless of which node they are returned from? Would a failure of your database result in application downtime that...
Cluster Configuration refers to the setup and maintenance of a cluster in a computer system, where information is stored in a cluster database synchronized among nodes and backed up for recovery procedures. AI generated definition based on: Designing Storage for Exchange 2007 SP1, 2008 ...
It is possible to specify NDB Cluster tables as diskless, meaning that tables are not checkpointed to disk and that no logging occurs. Such tables exist only in main memory. A consequence of using diskless tables is that neither the tables nor the records in those tables survive a crash. ...
The examples above demonstrate that binary log updates that are irrelevant for a MySQL Server to write can be discarded. But first, we should develop the meaning ofdiscarded. NDB data nodes do not know the whereabouts of a particular update after sending it to the subscribing nodes. They aim...
It is possible to specify NDB Cluster tables as diskless, meaning that tables are not checkpointed to disk and that no logging occurs. Such tables exist only in main memory. A consequence of using diskless tables is that neither the tables nor the records in those tables survive a crash. ...
Of course MySQL Cluster also delivers the rich functionality of SQL and all the data integrity you'd expect from an ACID-compliant relational database, enabling users to perform complex, real-time queries against their OLTP data sets (which themselves are much faster in the 7.2 release), as ...
This migration is fairly self-contained, meaning it won’t affect your existing instance’s data. As such, you can review and test the new deployment with your migrated data; from there, you can decide whether or not you want to start using new deployment. This let...
The forming cluster builds up the memory database by recreating first the groups and then the resources on the basis of the new configuration. Configuring the networks (which is covered in the next section) happens after the Cluster service has destroyed the groups and resources and before it ...
Replication in NDB Cluster makes use of a number of dedicated tables in the mysql database on each MySQL Server instance acting as an SQL node in both the cluster being replicated and in the replica. This is true regardless of whether the replica is a single server or a cluster. ...