Performance counters for multi-site Ceph Object Gateway data sync

The following performance counters are available for multi-site configurations of the Ceph Object Gateway to measure data sync:

• poll_latency measures the latency of requests for remote replication logs.

• fetch_bytes measures the number of objects and bytes fetched by data sync.

Use the ceph --admin-daemon command to view the current metric data for the performance counters:

Syntax

ceph --admin-daemon /var/run/ceph/cluster-id/ceph-client.rgw.RGW_ID.asok perf dump data-sync-from-ZONE_NAME

Example

[ceph: root@host01 /]# ceph --admin-daemon  /var/run/ceph/cluster-id/ceph-client.rgw.host02-rgw0.103.94309060818504.asok perf dump data-sync-from-us-west

{
    "data-sync-from-us-west": {
        "fetch bytes": {
            "avgcount": 54,
            "sum": 54526039885
        },
        "fetch not modified": 7,
        "fetch errors": 0,
        "poll latency": {
            "avgcount": 41,
            "sum": 2.533653367,
            "avgtime": 0.061796423
        },
        "poll errors": 0
    }
}

Reference

For more information about performance encounters, see Ceph performance counters.