Version

Argent Advanced Technology 5.1A-1807-A and below

Date

Tuesday, 4 September 2018

Summary

When running Device Magic Rules against network switches with more than 100 ports, monitor tasks can be significantly late, skipped and cancelled

Further investigation shows more than 1,000 WO files with extension ‘.WR’ are accumulating in WO subfolders

The issue has been addressed in Argent Advanced Technology 5.1A-1810-A

Technical Background

Device Magic Rule is commonly used to monitor port bandwidth usage

Argent Argent Advanced Technology Engine calculates port bandwidth by polling in/out octets of each switch port and comparing with last poll values

The current values must be saved into database and used for next poll

Though saving performance value for each port into database only takes a few milliseconds, when the switch has more than 100 ports, sequentially saving the poll values into database can take significant amount of time

When there are more than 100 of such devices to monitor, it can take very long to handle all the monitoring data

As a result, the Relator cannot complete execution in time, and monitoring tasks are delayed, skipped or even cancelled

Argent Argent Advanced Technology 5.1A-1810-A addresses the issue by saving data using a thread pool

The parallel processing is the right solution for such I/O intensive work

The thread pool size is controlled by DWORD value of registry HKLM\Software\Argent\ARGENT_FOR_SNMP\UPDATE_SWITCH_INFO_THREAD_COUNT

The valid value is 0 – 100

The default value is 0, which means no thread pool is used and compatible with the old sequential processing

Resolution

Upgrade to Argent Advanced Technology 5.1A-1810-A or above

Edit value of registry HKLM\Software\Argent\ARGENT_FOR_SNMP\UPDATE_SWITCH_INFO_THREAD_COUNT to 30