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Answered on 18/10/2018 Learn IT Courses/Hadoop
Files are split in blocks. 1 block is of maximum 128 MB. Suppose a file is of size 300 MB. It will be split into 3 blocks of sizes A - 128 MB, B-128 MB, C-44 MB. Each block will be stored in different nodes and will be further replicated in other n-1 node. Where n is replication factor. In no case, replicas will be on same nodes for each individual block. For example A will be in node N1, then it's replica A1 and A2 will not be stored in the node N1. However, A,B,C can exist in same node N1, in case number of node is less.
Answered on 18/10/2018 Learn IT Courses/Hadoop
Files are split in blocks. 1 block is of maximum 128 MB. Suppose a file is of size 300 MB. It will be split into 3 blocks of sizes A - 128 MB, B-128 MB, C-44 MB. Each block will be stored in different nodes and will be further replicated in other n-1 node. Where n is replication factor. In no case, replicas will be on same nodes for each individual block. For example A will be in node N1, then it's replica A1 and A2 will not be stored in the node N1. However, A,B,C can exist in same node N1, in case number of node is less.
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