JVM Set up

Nodes , Every tomcat Expected treatment 500 A link , Then the maximum number of long connections in the connection pool is 2000.

Full node replication （DeltaManager） Number of mode cluster nodes 3-6 It is advisable to .

Primary and secondary replication （BackupMnagager） The mode cluster node can go to 10 Table above .

Connector Set up

There are three modes ：

①JAVA BIO, Blocking mode , The most original and stable ,SSL be based on JSSE, It's also tomcat7 Previous default mode , It supports smaller concurrency . High concurrency, but short links are also preferred .BIO There is a very important parameter in mode ,maxThreads, Represents the maximum number of simultaneous requests , The general range is 200-800, It can be downloaded from 400 Began to set , If it is CPU Intensive applications can reduce , If it is right or wrong CPU Intensive applications can increase .

②JAVA NIO, Non-blocking mode ,SSL be based on JSSE, The reception of the connection 、 Read and write are done by special threads , yes tomcat8 Post default mode , It supports large concurrent multi link processing . High concurrent long connection preferred .

③Native APR, Non-blocking mode , It's a pattern of using native code to improve performance , It consists of C++ To write ,SSL Is based on OpenSSL. It supports larger concurrency, more link handling .

Generally only JAVA BIO And JAVA NIO Switch between , It's easy to switch between them SSL, Because the implementation is based on JSSE, also Native APR It could be unstable on some machines .

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