Historian Server Sizing Recommendations

The size of a Historian server is determined by:

• The number of tags from which data is collected. The number of tags is an indicator of the number of concurrent users likely to access the system. The primary factor is server memory requirements; CPU load is a secondary factor. If the number of concurrent users is significantly different from the suggested guidelines, adjust server memory size accordingly.
• The rate of alarms and events collection.
• The frequency of data collection.
• The amount of data you want to keep online.

The following table provides the recommended hardware components for a Historian server with the Standard license based on the number of tags that you want to use. These recommendations may vary based on years of data online, update rate, data compression setting, and other tag configuration parameters.

Hardware Component	Less Than 10,000 Tags	10,000 to 50,000 Tags	100,000 to One Million Tags	One Million to Two Million Tags	Two Million to Five Million Tags
RAM (in GB)	8 GB/16 GB (recommended for a single node setup)	16 or 32			32 or 64
Disk Size (in GB)	100 or 250	250		500
Processor Type	Intel Core-i5, i7 family, or equivalent	Intel Core-i5, i7 family, or equivalent	Intel Xeon (56xx, E5 family or AMD Opteron 42xx/62xx family)
CPU	Dual/Quad core	Dual/Quad core		2-socket	2-socket or 4-socket
CPU Speed (in GHz)	2.8	2.8		2.6
CPU clock speed (in GHz)	2.8	2.8		2.6
Storage Type	SAS SSD with RAID level 0 configured	SAS SSD with RAID level 0 configured	Direct-attached or shared storage with SAS enterprise class drives. Hardware RAID controller with cache memory. SAN recommended over NAS		High speed shared storage with SAS or SSD drive types. Hardware RAID controller with cache memory. SAN recommended over NAS.
Years of data online	1	1	1	1	1