Very high latency values

["Dan Ryder (daryder)" <daryder@xxxxxxxxx>]

Hello,

 

I’m working with two different Ceph clusters, and in both clusters, I’m seeing very high latency values.

 

Here’s part of a sample perf dump:

 

"recoverystate_perf": { "initial_latency": { "avgcount": 338,

          "sum": 0.069851000},

      "started_latency": { "avgcount": 1647,

          "sum": 322317122.940019000},

      "reset_latency": { "avgcount": 1985,

          "sum": 195.935076000},

      "start_latency": { "avgcount": 1985,

          "sum": 0.234355000},

      "primary_latency": { "avgcount": 266,

          "sum": 10819570.688122000},

 

You can see both started latency and primary latency have extremely high values.

 

Some info about the cluster:

All nodes are on the same subnet - 2 VMs, 1 physical node

VM1 is just a Monitor, VM2 is Monitor and OSD, Physical node is just an OSD.

 

 

One additional question, are these latency values in milliseconds? Is there any documentation on the units for perf dump command?

I’ve looked around but haven’t seen anything.

 

Thanks,

Dan

 

 

Dan Ryder ENGINEER.SOFTWARE ENGINEERING CSMTG Performance/Analytics daryder@xxxxxxxxx Phone: +1 919 392 7438	Cisco Systems, Inc. 7100-8 Kit Creek Road PO Box 14987 27709-4987 Research Triangle Park United States Cisco.com

 

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