When configuring a VPLEX Metro cluster, especially for a company planning to create distributed volumes with a large amount of storage like 200 TB, it is essential to adhere to EMC best practices for the size of logging volumes.
* Purpose of Logging Volumes: Logging volumes in VPLEX are used to store write logs that ensure data integrity and consistency across distributed volumes. These logs play a critical role during recovery processes1.
* Size Considerations: The size of the logging volumes should be proportional to the amount of active data being written to ensure that all write operations are captured in the logs. For 200 TB of distributed storage, a minimum size of 10 GB for each logging volume is recommended to handle the logging requirements1.
* Configuration: The logging volumes should be configured on each cluster to provide redundancy and high availability. This means that both clusters in a VPLEX Metro configuration should have logging volumes of at least the minimum recommended size1.
* Best Practices: EMC best practices suggest that the logging volume should be sized appropriately to support the operational workload and to ensure that there is sufficient space to capture all write operations without any loss of data1.
* Verification and Monitoring: After setting up the logging volumes, it is important to monitor their utilization to ensure they are functioning correctly and to adjust their size if necessary based on the actual workload1.
In summary, consistent with EMC best practices, the minimum size for logging volumes at each cluster in a VPLEX Metro cluster being installed for creating distributed volumes with 200 TB of storage should be 10 GB. This size ensures that the logging volumes can adequately support the write logging requirements for the amount of storage being used.