问题描述
在 Datastax OpsCenter 中查看节点详细信息时:
When looking at node details in Datastax OpsCenter:
我们可以看到有 34903422 个本地传输请求"，但有 1072 个被阻止.
We can see that there were 34903422 "native-transport-requests", but 1072 were blocked.
- 有人能解释一下什么是本地传输请求吗?这与突变有什么关系?
- 他们被屏蔽是否正常?这意味着什么?
顺便说一句.我们还可以看到删除了 93 个突变，我们知道这意味着什么:什么是 cassandra 中的突变?.
BTW. We can also see that there were 93 mutations dropped and we know what that means: What is mutation in cassandra?.
推荐答案
本机传输是 CQL 本机协议(与 Thrift 协议相对)，并且是所有现代 Cassandra 驱动程序与服务器通信的方式.这包括所有读/写/架构更改/等......
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 ...
被阻塞的请求是一个等待其他事情完成才能运行的请求.实际上阻塞的 C* 操作很少，因此阻塞的总数应该非常低.总计数只是被阻止的所有请求在一段时间内的总和.
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.
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