Recovery process of elasticsearch


(Faiz Halde) #1

Can someone explain how the recovery steps of elasticsearch works?

e.g. when a node comes back up, shards get initialized. I see in cat recovery files files_percent & translog and translog_percent

translog recovery makes sense to me [reapply everything in translog], but what is file_percent? I know each shard is made of many segment files. But what exactly is initialization step of a shard? What operations are performed during initialization? And why is it slow at times?


(system) #2

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