IDAS performance

An IDAS (I/O data acquisition service) can acquire an unlimited number of real-time data values, from an unlimited number of I/O Servers, each with an unlimited number of topics. However, IDASs are subject to the following limitations.

• The maximum sustained data throughput for any single IDAS is 30,000 items per second for real-time data. For late or old data, the maximum throughput is 9,000 items per second. The total combined throughput (real-time data plus late or old data) cannot exceed 30,000 items per second. For higher-volume applications, you can set up multiple IDASs to serve a single storage subsystem.

• The size of any data value is limited to 64,000 bytes.

• The maximum number of tags supported by any single IDAS is 30,000.