Recently I setup 3 virtual machines for our new file servers and a physical server as our new backup server running Symantec BackupExec 2010 R3. All 4 servers are running Windows Server 2008 R2 with SP1.
Today I disabled Receive-Side Scaling and Receive Windows Auto-Tuning Level on 2 of the 3 file servers and the backup server. I just ran the backup for the 3 file servers and I am seeing improvement in backup rate for the 2 file servers with Receive-Side Scaling and Receive Windows Auto-Tuning Level disabled. The 2 file servers are having backup rate of about 3000MB/min while the other file server is having backup rate of 2000MB/min.
- To disable Receive-Side Scaling: netsh int tcp set global rss=disabled
- To disable Receive Windows Auto-Tuning Level: netsh int tcp set global autotuning=disabled
- Reboot servers
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