Backups slowed when operating in partitioned Deduplication Database (DDB) environment

Article ID: DD0070 Network performance is degraded when using MediaAgents configured with partition DDB.

Symptom

Backups using MediaAgents with partioned DDB are noticably slower than backups to other MediaAgents..  

For cloud environment, examination of backup logs show large number of dropped network packages (example: Amazon S3 PUT/GET requests)

Network performance analysis showing bottleneck on MediaAgent.

Cause

Trend Micro Vulnerability Protection software is installed and is limiting network traffic between MediaAgents. Network packets streams are being routed through the Vulnerability Protection network engine before being allowed to continue up the protocol stack. This routing is causing significant delays in DDB loookups and library writes.

Resolution

Uninstall Trend Micro Vulnerability Protection software.