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Can anyone tell me what is fsimage in Hadoop?

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An fsimage file comprises the complete directory structure (namespace) of the file system at a point in time. A unique and monotonically increasing transaction ID will be assigned to each file system modification. An fsimage file represents the file system state after doing all the modifications till a specific transaction ID.

If you want to learn Hadoop, I recommend this Hadoop Training program by Intellipaat.

Also, watch this YouTube tutorial on Hadoop:

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