We recommend that your ClearSCADA system complies with the following operational limits:
| Parameter | 32-Bit Limit | 64-Bit Limit | Notes |
|---|---|---|---|
|
Maximum number of objects (database items) |
150,000 Objects |
1,000,000 Objects |
Exceeding these limits on 32-bit platforms will cause DBServer to run out of virtual address space. |
|
Maximum burst rate of non-historic updates |
10,000 per second |
10,000 per second |
|
|
Maximum burst rate of historic data updates |
1,000 per second |
1,000 per second |
|
|
Maximum burst rate of alarms and events |
500 per second |
500 per second |
|
|
Maximum sustained rate of historic data updates per point |
4 per minute |
4 per minute |
Exceeding these limits will create historic files in excess of 1.3MB (the maximum recommended historic data file size for standard hardware). This limit can be exceeded provided that care is taken when selecting appropriate hardware and communication links. |
|
Maximum sustained rate of events per journal section (256 Objects) |
6,825 per hour |
6,825 per hour |
Exceeding these limits will create historic files in excess of 5MB (the maximum recommended Event Journal file size for standard hardware). This limit can be exceeded provided that care is taken when selecting appropriate hardware and communication links. |
|
Maximum number of historic files |
10,000,000 files |
50,000,000 files |
Exceeding these limits on 32-bit platforms will cause DBServer to run out of virtual address space. |
|
Maximum number of historic data records |
6,000,000,000 records |
30,000,000,000 records |
|
|
Maximum number of event records |
1,000,000,000 records |
5,000,000,000 records |
|
|
Maximum number of alarms |
65,000 alarms |
250,000 alarms |
|
|
Maximum number of ViewX clients |
100 |
100 |
|
|
Maximum number of WebX clients |
500 |
500 |
|
|
Maximum Server to Server Link latency |
70ms |
70ms |
Exceeding this limit can result in the servers being unable to synchronize correctly, server timeouts and can also cause slow performance. |
|
Minimum Server to Server link bandwidth |
Symmetrical 2 Mbit per second |
Symmetrical 2 Mbit per second |
This is the minimum server-to-server bandwidth for a medium sized system, for example one with up to 5,000 points. Larger systems need correspondingly higher bandwidth and will be dependent on data update rates. |
For information on client operational limitations, please see Operational Limitations - Client.