Yuqi Du has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/19357 )

Change subject: [tools] Add 'kudu local_replica tmeta delete_rowsets' to delete 
rowsets from tablet
......................................................................


Patch Set 6: Code-Review+1

(1 comment)

http://gerrit.cloudera.org:8080/#/c/19357/3/src/kudu/tools/tool_action_local_replica.cc
File src/kudu/tools/tool_action_local_replica.cc:

http://gerrit.cloudera.org:8080/#/c/19357/3/src/kudu/tools/tool_action_local_replica.cc@105
PS3, Line 105: DEFINE_bool(backup_metadata, false,
> > It's safer using default 'true' and use 'enable_adding_orphaned_blocks' f
The CLI command is very useful for the replicaion_factor = 1, and the only one 
tablet replica is corrupted.

It seems the CLI command should work at FLAGS_backup_metadata false and 
FLAGS_enable_adding_orphaned_blocks true, and after running it. And it is 
impossible to rollback. Hence, serious problems may happen by incautious 
administrators.

In order to avoid the serious problems, backup metadata/data may needed. But 
it's a little difficult because the deleting operation can not avoid some 
dangerous. At the same time, the CLI command face to a tserver, if a tablet has 
3 replicas, it should keep writing stop and operate at 3 tservers.

Maybe we should add some describe words or some forbidden condition later.



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: If2cf9035babf4c3af4c238cebe8dcecd2c65848f
Gerrit-Change-Number: 19357
Gerrit-PatchSet: 6
Gerrit-Owner: Yingchun Lai <acelyc1112...@gmail.com>
Gerrit-Reviewer: Alexey Serbin <ale...@apache.org>
Gerrit-Reviewer: KeDeng <kdeng...@gmail.com>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Wang Xixu <1450306...@qq.com>
Gerrit-Reviewer: Yifan Zhang <chinazhangyi...@163.com>
Gerrit-Reviewer: Yingchun Lai <acelyc1112...@gmail.com>
Gerrit-Reviewer: Yuqi Du <shenxingwuy...@gmail.com>
Gerrit-Comment-Date: Tue, 03 Jan 2023 02:47:53 +0000
Gerrit-HasComments: Yes

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