![]() ![]() ![]() Insertion of data into table that is also written in MemTable that holds the data till it’s get full. In Write Operation as soon as we receives request then it is first dumped into commit log to make sure that data is saved. If there is any case in which data is not consistent across the node then background Read Repair Request initiated that makes sure that the most recent data is available across the nodes. For Example: CONSISTENCY TWO It simply means that Any two nodes in data center will acknowledge. ![]() In this operation coordinator will contact to replicas specified by the consistency level. In this operation coordinator node sends the read request to one of the replicas. The node that accepts the write requests called coordinator for that particular operation. In Read Operation there are three types of read requests that a coordinator can send to a replica. It is the collection of many data centers. For Example:As shown in diagram node which has IP address 10.0.0.7 contain data (keyspace which contain one or more tables). It is the place where actually data is stored. Node is the basic component in Apache Cassandra. ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.
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