Sizing Log Streams for CICS System Data Interval Records

This sample table sizes log streams for CICS system data interval records:

RetPd Days	Avg Rec Length	Hourly Count	Total Byte Requirement	Max Dsns	4-KB Blocks	Cyls
30	550	80	31,680,000	30	258	2
60	550	120	95,040,000	60	387	2

Consider the following:

Hourly Count
Each CICS data collector writes a System Interval record at the conclusion of its system data collection interval. By default, the interval is 15 minutes. This means that each CICS writes four (4) records per hour.

If the data from multiple CICS regions get logged to the log stream, then this value must be the combined total for those CICS regions.
The above example assumes:
- The system interval is 15 minutes
- That 10 CICS regions are being logged to the log stream
The volume of this log stream should be low.
The large amount of data can be maintained.