Many users co-locate the Management and Application nodes which reduces the number of nodes to four. A: Yes, as long as your network has the characteristics discussed here. MySQL Cluster has long offered Geographic Replication, distributing clusters to remote data centers to reduce the affects of geographic latency by pushing data closer to the user, as well as providing a capability for disaster recovery.
Customer List ». This is often used for the scale-out of global services, data locality and disaster recovery. Transaction conflict detection and resolution is provided when using bi-directional geographic replication. A: MySQL Cluster configurations will typically have at least 2 copies of all data, held on different hosts. To cover total system failure, transaction logs and checkpoint files are persisted on disk with configurable frequency.
Additionally, non-indexed data may be stored on disk. For the no logging option, Cluster will still create log files, but data will not be checkpointed to disk. A: No. At the same time, risks of database downtime that previously resulted from manual configuration errors, are significantly reduced. Can you give me a practical example of where MySQL Cluster Manager would help with productivity and reduce risk of downtime? A: As an example, management operations requiring rolling restarts of a MySQL Cluster database that previously demanded 46 manual commands 1 and which consumed 2.
A: Administrators are able to create and delete entire clusters and start, stop and restart the cluster with a single command, as well as add nodes on-line. As a result, administrators no longer need to manually restart each data node in turn, in the correct sequence, or to create custom scripts to automate the process.
MySQL Cluster Manager automates on-line management operations, including the upgrade, downgrade and reconfiguration of running clusters, without interrupting applications or clients accessing the database. Administrators no longer need to manually edit configuration files and distribute them to all other cluster nodes, or to determine if rolling restarts are required. MySQL Cluster Manager handles all of these tasks, thereby enforcing best practices and making on-line operations significantly simpler, faster and less error-prone.
A: It can do both. MySQL Cluster Manager provides the ability to control the entire cluster as a single entity, while also supporting very granular control down to individual processes within the cluster itself. A: MySQL Cluster Manager is able to monitor cluster health at both an Operating System and per-process level by automatically polling each node in the cluster.
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