Nodetool

[Karthick V]

Hi, 

 

In cassandra, nodetool option provide  lot of information about the node in which  nodetool proxyhistograms  provides information such as read and write latency like below

Percentile      Read Latency     Write Latency     Range Latency

                       (micros)              (micros)               (micros)

50%                446.00                 446.00                  29521.00

75%                924.00                 535.00                  88148.00

95%                2299.00               3311.00                105778.00

98%                24601.00             3311.00                105778.00

99%                35425.00             3311.00                105778.00

Min                 216.00                 259.00                  536.00

Max                35425.00             3311.00                105778.00 

 Is there any possible way to get these node tool information using  DataStax java Driver?

[Olivier Michallat]

Hi,

(Sorry for the late reply, for some reason this went to my spam folder)

No, the driver supports the CQL protocol only. Nodetool is based on JMX:

https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/tools/NodeTool.java

https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/tools/NodeProbe.java

https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/tools/nodetool/ProxyHistograms.java

If you have a particular need, it should be relatively easy to reimplement a JMX client in your application code.

--

Olivier Michallat

Driver & tools engineer, DataStax

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