Messaging Server Disk Throughput

Disk throughput is the amount of data that your system can transfer from memory to disk and from disk to memory. The rate at which this data can be transferred is critical to the performance of Messaging Server. To create efficiencies in your system’s disk throughput:

• Consider your maintenance operations, and ensure you have enough bandwidth for backup. Backup can also affect network bandwidth particularly with remote backups. Private backup networks might be a more efficient alternative.

• Carefully partition the store and separate store data items (such as tmp and db) to improve throughput efficiency.

• Ensure the user base is distributed across RAID (Redundant Array of Independent Disks) environments in large deployments.

• Stripe data across multiple disk spindles in order to speed up operations that retrieve data from disk.

• Allocate enough CPU resources for RAID support, if RAID does not exist on your hardware.

You want to measure disk I/O in terms of IOPS (total I/O operations per second) not bandwidth. You need to measure the number of unique disk transactions the system can handle with a very low response time (less than 10 milliseconds).