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To execute these procedures described in this page is required to be connected to *dev* or *prod* through *vnc*.
## Check Hadoop HDFS Status
Visit the URL: http://192.168.30.81:50070/dfshealth.html
Restart this service may corrupt the HBase data.
## Check HBase Status
Visit: http://192.168.30.83:16010/master-status
The URL above must show at least one *Region Server*. If the page is not available, the HBase is off-line.
### Maintainance
* Restart the *Master* connected on the *dev* server:
“`
$ lxc-attach -n hb-node3 — /etc/init.d/hbase-master restart
“`
* Restart the *Region-server* connected on the *dev* server:
“`
$ lxc-attach -n hb-node4 — /etc/init.d/hbase-regionserver restart
“`
## Check OpenTSDB Status
Visit: http://192.168.30.80:4242
### Maintainance
OpenTSDB may create a large cache over long periods of use. Restarting it may free 90% of its memory used
* Restart OpenTSDB servers:
“`
$ for i in 3 4; do lxc-attach -n hb-node$i — /etc/init.d/opentsdb restart && sleep 10 ; done
“`