问题
When looking at node details in Datastax OpsCenter:
We can see that there were 34903422 "native-transport-requests", but 1072 were blocked.
- Could someone explain what is native transport request? What is that in relation to mutation?
- Is it normal that they are being blocked and what does it mean?
BTW. We can also see that there were 93 mutations dropped and we know what that means: What is mutation in cassandra?.
回答1:
The native transport is the CQL Native Protocol (as opposed to the Thrift Protocol) and is the way all modern Cassandra Driver's communicate with the server. This includes all reads/writes/schemachanges/etc ...
A blocked request is one that is sitting around waiting for something else to complete before it can run. Very few C* operations are actually blocking so the total blocked number should be very low. The total count is just the over time sum of all requests that were blocked.
来源：https://stackoverflow.com/questions/32456843/what-are-native-transport-requests-in-cassandra