Troubleshooting: Replication Gateway appliance
To troubleshoot the Replication Gateway performance, following utilities can be used. Note that the data shown by these utilities may vary as shown by actual system utility.
vxgwiorecv.py: This utility can be used on source Replication Gateway that displays statistics about inflow of the data from the workload virtual machines configured. The important column which can help in troubleshooting is:
Rate: This means Replication Gateway is receiving data from corresponding virtual machine (VTS-ID) at this speed.
Latency (Disk, Net): This represent the write latency to staging storage and network latency between workload virtual machine and Replication Gateway. If the value is high, this can indicate that workload virtual machine may hit with memory cap and chances of frequency DIFF SYNC cycles are high.
Note:
The same utility is avaialble through klish option using command ingress-data . For details of the remaining columns refer, See Klish menu options for Replication Gateway. in documentation.
Vxgwtxrx.py: This utility can be used on source as well as on target Replication Gateway that displays statistics about network and staging storage. On the source Replication Gateway, update sets has to be read from staging storage and send on network to target Replication Gateway. Target Replication Gateway receive this data and write into staging storage. The important column which can help in troubleshooting is:
Rate: Rate at which data is send to target Replication Gateway. This will also give idea about total bandwidth consumed by Replication Gateway.
Latency (Disk, Net): This represent the read/write latency from/to staging storage and network latency between Replication Gateway. If disk value is high, this can indicate problem with staging storage. If Net value is high, this can indicate slow network.
Note:
The same utility is avaialble through klish option using command network-data . For details of the remaining columns refer, See Klish menu options for Replication Gateway. in documentation.
vxgwaplr.py: This utility can be used on target Replication Gateway to know performance with respect to actual virtual machine disk attached to Replication Gateway. The important column which can help in troubleshooting is:
Rate: Rate at which data is written to target disk.
Latency (Read, Write): This represent the read/write latency from staging storage to actual disk. If read value is high, this can indicate problem with staging storage. If write value is high, this can indicate problem with target disk.
Note:
The same utility is avaialble through klish option using command disk-data . For details of the remaining columns refer, See Klish menu options for Replication Gateway. in documentation.