Tiered historians

If you are installing a tiered Historian, tier-1 nodes use the same basic configuration for the number and types of tags and data collection rates.

The tier 1 configuration should be delta data collected and stored:

• 12,000 analog tags every 2 seconds

• 2,900 discrete tags every 2 seconds

• 100 32-character string tags every 30 seconds

For the analog and discrete tags, the averages and value state aggregates are:

• 6,000 tags with an hourly calculation performed at the top of each hour

• 6,000 tags with 1-minute calculations performed at the top of each minute

plus

• 1,500 tags replicated (not aggregated) in tier 2

• 1,500 tags stored only in tier 1 (no aggregates or replication)