VNX: 복제 루트 체크포인트가 손상/비활성 상태일 때 복제 정리(사용자 수정 가능)

a) Find the full name of root checkpoints by:
[nasadmin@CS0 ~]$ server_mount ALL | grep unmount
root_rep_ckpt_28_242474_1 on /root_rep_ckpt_28_242474_1 ckpt,perm,ro,<unmounted>
root_rep_ckpt_28_242474_2 on /root_rep_ckpt_28_242474_2 ckpt,perm,ro,<unmounted>
b) For each checkpoint, issue the following command and note the file system name
[nasadmin@CS0 ~]$ /nas/sbin/rootnas_fs -info root_rep_ckpt_28_242474_1 | grep checkpt_of
checkpt_of= fs1 Mon Jun 15 16:51:54 EDT 2015

Repeat above as every FS will have 2 root checkpoints per replication session, so good to get all FS names first before proceeding to next step

a) Identify the file system name from the replications failing with critical errors by :
nas_replicate -list

Example: 
$ nas_replicate -i jsq-stx-mq
ID                             = 156_APM001_01F4_137_APM002_01F4
Name                           = rep_fs1
Source Status                  = Critical 8865448248: The replication session encountered an error that halted progres                                                                                          s.
Network Status                 = OK
Destination Status             = OK
Last Sync Time                 = Wed Jul 13 14:35:15 EDT 2016
Type                           = filesystem
Celerra Network Server         = CS01
Dart Interconnect              = Replication
Peer Dart Interconnect         = Replication
Replication Role               = source  <== note the role 
Source Filesystem              = fs1 <== this is the fs name if the role is source
Source Data Mover              = server_2
Source Interface               = 10.x.x.x
Source Control Port            = 0
Source Current Data Port       = 0
Destination Filesystem         = fs1-DR <== this is the fs name if the role is destination
Destination Data Mover         = server_2
Destination Interface          = 10.x.x.x
...

Match this name from names identified in step 2 to ensure they are same.
b) Check the replication checkpoint status by : fs_ckpt <fs_name> -list -all

Example: 
$ fs_ckpt fs1 -list -all
id    ckpt_name                creation_time           inuse fullmark   total_savvol_used  ckpt_usage_on_savvol
32    root_rep_ckpt_28_242474_ 06/15/2015-16:51:54-EDT   y   90%        INACTIVE           N/A
33    root_rep_ckpt_28_242474_ 06/15/2015-16:51:56-EDT   y   90%        INACTIVE           N/A
34    fs1_ckpt1                          06/17/2015-16:51:56-EDT   y   90%        INACTIVE           N/A
Info 26306752329: The value of ckpt_usage_on_savvol for read-only checkpoints may not be consistent with the total_savvol_used.

id    wckpt_name               inuse fullmark total_savvol_used  base  ckpt_usage_on_savvol

INACTIVE indicates, this is corrupted.
c) If the "inuse" value is "y", delete the root checkpoints using the following command:  /nas/sbin/rootnas_fs -delete id=<root_ckpt_id> -o umount=yes -ALLOW_REP_INT_CKPT_OP 
Rarely, root checkpoint may have, inuse" value as "n", then,  /nas/sbin/rootnas_fs -delete id=<root_ckpt_id> -ALLOW_REP_INT_CKPT_OP 

Example:
[nasadmin@CS0 ~]$ /nas/sbin/rootnas_fs -delete id=32  -o umount=yes -ALLOW_REP_INT_CKPT_OP 
id        = 32
name      = root_rep_ckpt_28_242474_1
acl       = 0
in_use    = True
type      = ckpt
worm      = off
..

d) Repeat above step and delete all the root checkpoints 
e) For non root checkpoints, delete using same command with out the last arument (Example: /nas/sbin/rootnas_fs -delete id=34 -o umount=yes)

For the "source" replication role : nas_replicate -delete <replication_session_name> -mode source -background
For the "destination" replication role : nas_replicate -delete <replication_session_name> -mode destination -background

Above command will give a task number, which can be used to view the status, by "nas_task -i <task_number>