Previous.checkpoint Folder not there in SNN.

[Dhanasekaran Anbalagan <bu...@gmail.com>]

Hi Guys,

I seen the Previous.checkpoint Folder not there in SNN. otherwise how to
enable previous.checkpoint folder in SNN.

How to understand Previous checkpoint. My question not wriiten namenode
return back not written SNN.

root@dvcliftonhera123:/disk1/dfs/snn/current# ls

edits_0000000000380092851-0000000000380176412
edits_0000000000381167496-0000000000381167605
edits_0000000000380176413-0000000000380266712
edits_0000000000381167606-0000000000381167715
edits_0000000000380266713-0000000000380350880
edits_0000000000381167716-0000000000381167825
edits_0000000000380350881-0000000000380459988
edits_0000000000381167826-0000000000381167935
edits_0000000000380459989-0000000000380933328
edits_0000000000381167936-0000000000381168046
edits_0000000000380933329-0000000000380936493
edits_0000000000381168047-0000000000381168159
edits_0000000000380936494-0000000000380936603
edits_0000000000381168160-0000000000381168269
edits_0000000000380936604-0000000000380979139
edits_0000000000381168270-0000000000381168379
edits_0000000000380979140-0000000000381066695  fsimage_0000000000381168269
edits_0000000000381066696-0000000000381117197
fsimage_0000000000381168269.md5
edits_0000000000381117198-0000000000381117307  fsimage_0000000000381168379
edits_0000000000381117308-0000000000381117417
fsimage_0000000000381168379.md5
edits_0000000000381117418-0000000000381117527
fsimage.ckpt_0000000000191857167
edits_0000000000381117528-0000000000381117637
fsimage.ckpt_0000000000201509556
edits_0000000000381117638-0000000000381132625
fsimage.ckpt_0000000000273563134
edits_0000000000381132626-0000000000381167380  VERSION
edits_0000000000381167381-0000000000381167495

Please guide me.

-Dhanasekaran.

Did I learn something today? If not, I wasted it.