To store a file of 380 MB on HDFS, how many blocks will be required in Hadoop 1.x and Hadoop 2.x
Question
To store a file of 380 MB on HDFS, how many blocks will be required in Hadoop 1.x and Hadoop 2.x
Solution
In Hadoop 1.x, the default block size is 64 MB. In Hadoop 2.x, the default block size is 128 MB.
To calculate the number of blocks required to store a file, you divide the file size by the block size. If the file size is not a multiple of the block size, you round up to the nearest whole number because even a small amount of data requires a whole block.
For Hadoop 1.x: 380 MB / 64 MB = 5.9375 blocks Since you can't have a fraction of a block, you round up to 6 blocks.
For Hadoop 2.x: 380 MB / 128 MB = 2.96875 blocks Again, rounding up, you would need 3 blocks.
So, to store a file of 380 MB on HDFS, you would need 6 blocks in Hadoop 1.x and 3 blocks in Hadoop 2.x.
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