With the continuous increase in the volume of big data, the requirements for the physical security of data storage are getting higher and higher, and higher requirements are put forward for multiple copies of data and disaster tolerance mechanisms.

Spark is a memory-based computing engine. All data during the running of Spark programs can only be stored in memory.

In the Fusioninsight Hadoop cluster, through df-hT query on a node, the partitions seen include the following:
/var/log
/srv/BigData
/srv/BigData/hadoop/data5
/srv/BigData/solr/solrserver3
/srv/BigData/dbdataom
What is the planned combination of the best Raid level for the disks corresponding to these partitions?

The smallest processing unit of HBase is Region, and the routing information between User Region and RegionServer is stored in Zookeeper.

The graphical health inspection tool Fusioninsight Tool is composed of FusionCare and SysChecker.