Knowledge point memo

Transaction isolation level  
CAP   
MVCC 
cache server redis, mogondb ssdb   
DB: mysql oracle sql server db2
Mysql database engine difference comparison, row lock, table lock  
zookeeper to achieve distributed  
freemarket macro macro  
ELK
session synchronization
JNC,
thread pool size how to set the thread Pool abandonment principle mybatis
#The difference between $ and $<![CDATA[]]>  Optimistic
lock Pessimistic lock Shared lock Exclusive lock  Security] JUnit test    StringBuilder && StringBuffer  List && Deque && Node LinkedList && ArrayList BlockingQueue, SynchronousQueue generic super extends Upper and lower bounds can only be selected and one can only be stored Study ESB/RSF configuration





















poll method and offer method