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 ?

CodePudding user response：

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.