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aniketpant
aniketpant

Reputation: 135

what does "in-memory" means ? In the context of hadoop

I read this line

when you are starting namenode, latest fsimage file is load into “in-memory”. and at the same time, edit log file is also loaded into memory if fsimage file doesn’t contain up-to date information

from https://data-flair.training/forums/topic/in-which-location-namenode-stores-its-metadata-and-why/ they are using term "in-memory" and "memory" are they different ?

Upvotes: 0

Views: 37

Answers (1)

Matt Andruff
Matt Andruff

Reputation: 5155

No they aren't different. They are loaded into RandomAccessFile if that helps to think about. For reference here is FSImage. To help you see how this is done.

Upvotes: 1

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