IBM Tivoli Monitoring > Version 6.3 Fix Pack 2 > Installation Guides > Installation Guide > Performance tuning > Tivoli Data Warehouse > Relational database design and performance tuning for DB2 Database servers > Hardware design and operating system usage
IBM Tivoli Monitoring, Version 6.3 Fix Pack 2
I/O
Improving I/O can include making accurate calculations for total disk space that an application requires, improving disk efficiency, and providing for parallel I/O operations.
- Calculating disk space for an application
Use the guidelines in this section to calculate total disk space that an application requires.
- Disk efficiency
You can improve disk efficiency with attention to the concerns outlined here.
- Selecting disk drives
Disks tend to grow larger every year, doubling in capacity every 18 months, and the cost per GB is lower each year. The cost difference of the two smallest drives diminishes until the smaller drive is not practical. The disk drives improve a little each year in seek time. The disk drives get smaller in physical size. While the disk drives continue to increase capacity with a smaller physical size, the speed improvements, seek, and so on, are small in comparison. A database that would have taken 36 * 1 GB drives a number of years ago can now be placed on one disk.
- Parallel operations
Provide for parallel I/O operations. Use the smallest disk drives possible to increase the number of disks for I/O throughput.
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Hardware design and operating system usage