hadoop - HDFS: Actual space of all disks on cluster vs usable HDFS size -

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how can calculate available size of hdfs cluster based on total size of disks in cluster?

e.g. if cluster 10 machines, each 1tb of storage, hadoop fs -df report?

more specifically, need store 5 tb of data in hdfs cluster. how total disk space cluster need?

that depends on how set hdfs replication factor. default (and recommended) 3.

you can set hdfs keep non-dfs space so, substract if need be.

a rough calculation file size * 3 = total storage needed.


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