dump rolebalancerinfo

Use the dump rolebalancerinfo command to see if the replication role balancer is currently switching the replication roles of any containers in a cluster. For example, if too many data containers with the master or intermediate roles exist within a storage pool, the replication role balancer switches the role of some of these containers to the tail role to evenly spread the load across nodes during the replication process. If the role balancer is not currently switching the roles of any containers, the command returns a message stating that there are no active role switches.

You can include some additional parameters with the dump rolebalancerinfo command, such as the volumeinfo parameter, which provides information about how the replication role balancer balanced container roles across each storage pool in a particular volume.

See Replication Role Balancer for more information about how the replication role balancer works.

For the best readability, use the -json option at the end of the command.

Parameters

Output

The following example shows the output of the dump rolebalancerinfo command when the replication role balancer switches a container to the tail role:

# maprcli dump rolebalancerinfo -json
{
      "timestamp":1452150159265, 
      "timeofday":"2016-01-07 07:02:39.265 GMT+0000",
      "status":"OK",
      "total":1,
      "data":[ 
             { 
                   "containerid":57482,
                   "Tail IP:Port":"10.10.104.37:5660-10.10.105.37:5660-",
                   "Updates blocked Since":"Thu Jan 07 07:02:24 UTC 2016"
              }
        ]
   }

# maprcli dump rolebalancerinfo -volumeinfo -volumename vol2 -json
{
	"timestamp":1452218225547,
	"timeofday":"2016-01-08 01:57:05.547 GMT+0000",
	"status":"OK",
	"total":1,
	"data":[
		{
			"VolumeBalancingInfo":{
				"Volume":"vol2",
				"Assign Cache Containers Count":60,
				"Assign Cache Containers Size":951171,
				"Zero Size Containers Count":5,
				"Storage Pools":[
					{
						"SpId":"e471499d52ce710e00566942c1075a69",
						"HostAddress":"10.10.104.34(2)",
						"NumContainers":17,
						:7,
						"NumTails":4,
						"SizeOfContainers":213690,
						:93769,
						:71230,
						"SizeOfTails":76001,
						"DesiredSizeOfTails":71230,
						"Assign Cache Containers Count":6,
						"Assign Cache Containers Size":71783
					},
					{
						"SpId":"6a7222578e9cb90300566942e00bfb3e",
						"HostAddress":"10.10.104.35(2)",
						"NumContainers":21,
						:6,
						"NumTails":9,
						"SizeOfContainers":373222,
						:141546,
						:124407,
						"SizeOfTails":115855,
						"DesiredSizeOfTails":124407,
						"Assign Cache Containers Count":3,
						"Assign Cache Containers Size":62491
					},
					{
						"SpId":"ca379b6cfc888270005669428c02c6e3",
						"HostAddress":"10.10.104.32(2)",
						"NumContainers":5,
						:0,
						"NumTails":2,
						"SizeOfContainers":107549,
						:0,
						:35849,
						"SizeOfTails":48267,
						"DesiredSizeOfTails":35849,
						"Assign Cache Containers Count":0,
						"Assign Cache Containers Size":0
					}
					
				]
			}
		}
	]
}

Output

Example

CLI

maprcli dump rolebalancerinfo -json