View the status of the Replica Set in MongoDB

Check the status of the Replica Set and execute rs. status ().

Rs. status ()
{
"Set": "set1 ",
"Date": "Thu Oct 28 2010 10:09:28 GMT + 0800 (CST )",
"MyState": 2,
"Members ":[
{
"_ Id": 0,
"Name": "192.168.95.216: 10000 ",
"Health": 1,
"State": 1,
"Uptime": 2486042,
"LastHeartbeat": "Thu Oct 28 2010 10:09:26 GMT + 0800 (CST )"
},
{
"_ Id": 1,
"Name": "zjm-Hadoop-slave217: 10000 ",
"Health": 1,
"State": 2,
"Self": true
},
{
"_ Id": 2,
"Name": "192.168.95.218: 10001 ",
"Health": 1,
"State": 7,
"Uptime": 2486042,
"LastHeartbeat": "Thu Oct 28 2010 10:09:27 GMT + 0800 (CST )"
}
],
"OK": 1
}

Health 1 indicates that the server is normal, and 0 indicates that the server is down.

If the state is 1, it indicates Primary, 2 indicates Secondary, 3 indicates Recovering, 7 indicates Arbiter, and 8 indicates Down.

To find data on Secondary, run the following command:

Db. getMongo (). setSlaveOk ();
Db. suv. find (). count ()

To view information about a Collection, you can use db. suv. stats ()

{
"Ns": "suv. suv ",
"Count": 9519581,
"Size": 573341552,
"AvgObjSize": 60.2276037149114,
"StorageSize": 736285696,
"NumExtents": 21,
"Nindexes": 3,
"LastExtentSize": 129238272,
"PaddingFactor": 1,
"Flags": 1,
"TotalIndexSize": 1612344128,
"IndexSizes ":{
"_ Id _": 462365632,
"Lt_1": 790758336,
"Cl. Cid_1": 359220160
},
"OK": 1
}

Where:

1. The size is DataSize, which is the space occupied by data.
2. StorageSize is the primary des free space allocated to this collection, that is, it includes allocated but idle space.
3. TotalIndexSize indicates the space occupied by all indexes.
4. TotalSize is the total space occupied by the Collection, which is equal to storageSize + totalIndexSize

You can use the following command to query the preceding information:

Db. suv. dataSize ()
Db. suv. storageSize ()
Db. suv. totalIndexSize ()
Db. suv. totalSize ()