????5.5 ??????CPU??I/O???????
????#??CPU????

????#????-P?????CPU????ALL????У???????????????

????#??I/O????

????#????-m????M??λ????????K
????#%util????????????I/O?????
????#await????????????е???????????read???
????I/O?????IOPS??r/s+w/s?????????1200???????IOPS???????ж?д??I/O????????????
????I/O???????????д????SAS??????????300M/s?????SSD??????????600M/s?????
????????????????MySQL???????????Щ???????????????????????Щ?????棬????Щ?????????????С???????????????????????????????????????ЩBAT????????????????????????У?????????????????????????????????????????NoSQL?????????????????????????????????и???????????????????????????治??????????????????????????????????NoSQL?У???MongoDB??HBase???????洢??????÷????????????HDFS??GFS?????????????????????Hadoop??Spark??Storm?????Щ??????????????????????????洢?????????????С???????????????λ?????и???????????????????????