Monitoring Performance

The two performance objects associated with File Replication service are listed in Table 18.1. The counters for these objects are available for each replica set managed by FRS while the service is running.

Table   18.1 FRS Performance Objects




Performance statistics for the Replicaconn object that defines replica connections to Dfs roots.


Performance statistics for the Replicaset object that defines a replica set.

Important FileReplicaSet counters that you can monitor to verify FRS performance are listed in Table 18.2.

Table   18.2 Key FileReplicaSet Counters



Change Orders Received

Number of change notifications received from inbound partners.

Change Orders Sent

Number of change notifications sent out to outbound partners.

File Installed

Number of replicated files installed locally.

KB of Staging Space Free

Amount of free space in the staging directory used by FRS to temporarily store files before they are replicated. The default staging space is 660 megabytes (MB).

KB of Staging Space In Use

Amount of space in the staging directory currently in use. If the staging directory runs out of space, replication stops.

Packets Received

Amount of data received locally. These packets can be change notifications, file data, or other command packets.

Packets Sent

Similar to packets received.

USN Records Accepted

Number of records that are accepted for replication. Replication is triggered by entries written to the NTFS change journal. FRS reads each file close record from the journal and determines whether to replicate the file.
An accepted record generates a change order, which is then sent out. A high value on this counter (about one every five seconds) indicates a lot of replication traffic. This can cause replication latency.

You can also observe FRS activity using Event Viewer. Select File Replication service , and then filter events by time and date or by type of event such as information, warnings, or errors. Right-click the individual message, and then click Properties to display details about an event.