Using Apache HBase to store and access data
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Read Access

In most cases, quota violation policies can affect the ability to read the data stored in HBase. A goal of applying these HBase quotas is to ensure that HDFS remains healthy and sustains a higher level of availability to HBase users. Guaranteeing that there is always free space in HDFS can yield a higher level of health of the physical machines and the DataNodes. This leaves the HDFS-reserved space percentage as a fail-safe mechanism.