Long VVJoin

Ultrasound has detected that a VVJoin operation has been running for more than twelve hours. A VVJoin is the algorithm that FRS uses to synchronize two members of a replica set on a connection. VVJoins can take a long time to complete if the number of files in the replica set is very large, or if many VVJoin are being performed in parallel against the same upstream member.

Resolution

Look for the backlog indicators in Ultrasound and make sure that the backlog is decreasing. If the backlog is not decreasing, look for:

• Network connectivity issues.
• Backlogged files as reported in Ultrasound
• Low disk space on the staging directory volume
• Sharing violations
• Schedule is too short (for DFS replica sets)
• Multiple VVJoins occurring on the specified member