DFS replication: Backlog is increasing

Question

Hi,

I am facing intermediate issue while replication DFS with Member server. After initial sync it stop syncing and backlog is increasing. I followed suggested troubleshooting to restart the DFS service, disable and enable replication. but it wasn't fix. can you please suggest me what are the way to fix?

Thanks

Answer 1

Hello Ravi Gaurav,

Thank you for posting in Microsoft Community forum.

Please check if backlog is increasing when it is non-working time or non-working day (weekend time) again.

If backlog is decreasing when it is non-working time or non-working day (weekend time), it means DFS replication is working fine. When a lot of people are working, DFS replication is slower (more and more backlogs) and even feels like the backlog is growing.

I hope the information above is helpful.

If you have any question or concern, please feel free to let us know.

Best Regards,

Daisy Zhou

Answer 2

Hello Daisy,

Backlog is increasing all the time never decrease, that's my worried point. Hence I am looking for possible reason.

Answer 3

Hello

Good day!

When you notice that the DFS (Distributed File System) replication backlog is consistently increasing, it indicates that the replication process is unable to keep up with the changes.

Here are some possible reasons for this issue:

1. Network Bandwidth:

Insufficient Bandwidth: If the network bandwidth between the DFS replication partners is insufficient, it can cause delays.

Network Congestion: High network traffic can affect the replication performance.

2. Volume of Changes:

High Frequency of Changes: If a large number of files are being modified frequently, the replication process might struggle to keep up.

Large File Sizes: Replicating large files can take more time, causing a backlog.

3.Replication Schedule: Limited Replication Window: If the replication schedule is too restrictive, there might not be enough time to complete the replication process.

4.Disk Performance:

Slow Disk I/O: Slow read/write speeds on the source or target servers can impede replication.

Disk Space Issues: Insufficient disk space can also cause replication delays.

5.CPU and Memory:

Resource Constraints: If the servers involved in replication are under heavy load or lack sufficient CPU or memory resources, replication performance might be affected.

6.Antivirus or Security Software:

Interference: Antivirus or other security software can sometimes interfere with the replication process, causing delays.

7.Replication Topology and Configuration:

Suboptimal Topology: The replication topology might not be optimized for the current network and workload.

Configuration Errors: Misconfiguration of the DFS replication settings, such as staging folder size or quota, can cause issues.

8.Error Conditions:

Replication Errors: Errors in the replication process, such as file locks or permissions issues, can cause replication to fail for certain files, leading to a backlog.

To identify and address the specific cause of your increasing DFS replication backlog, you can take the following steps:

Monitor Network Performance:

Check the network bandwidth and look for any signs of congestion or latency.

Review Change Volume: Assess the frequency and size of changes occurring on the replicated folders.

Check Disk Performance: Monitor disk I/O performance and ensure sufficient disk space is available.

Check Server Resources: Ensure the replication servers have adequate CPU and memory.

Review Security Software: Check if antivirus or other security software is interfering with replication and adjust settings if necessary.

Examine Error Logs: Review the DFS replication logs for any errors or warnings that might indicate underlying issues.

If you have any question or concern, please feel free to let us know.

Best Regards,
Daisy Zhou