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How are NDMP backup logs of FlexGroup different than FlexVol logs?

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Applies to

  • ONTAP 9.7 and later
  • NDMP FlexGroup

Answer

FlexGroup "master" log example:

  • fg_test1 is a FlexGroup
  • One constituent resides on node 1, while the other resides on node 2
  • This is the log from node 1
  • There are two Start lines, one for the entire backup, and the other for a local member constituent
  • This log excerpt contains the first Start line
  • The NDMP Session, 55050, is logged in the master log messages, and will not appear in the "member" log

dmp Tue Sep 22 08:08:05 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:master)(0) Start (Level 0, NDMP:55050)
dmp Tue Sep 22 08:08:05 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:master)(0) Options (b=0, u, TCP recv buffer size = 33580, TCP send buffer size = 33580)
dmp Tue Sep 22 08:08:05 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:master)(0) Filesystem (/vol/fg_test1__0001)
dmp Tue Sep 22 08:08:05 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:master)(0) Vol-Info (RW, comp=off, dedupe=off, clone=no)
dmp Tue Sep 22 08:08:05 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:master)(0) Granularity (volume)
dmp Tue Sep 22 08:08:05 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:master)(0) Snapshot (snapshot_for_backup.1, Tue Sep 22 08:08:00 EDT 2020)
dmp Tue Sep 22 08:08:05 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:master)(0) Tape_open (ndmp)

  • This is the second Start line, for the local member constituent
  • These are member messages
  • The filesystem contains the constituent name fg_test1__0001, rather than the FlexGroup name, fg_test1

dmp Tue Sep 22 08:08:08 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:member:0001)(1) Start (Level 0)
dmp Tue Sep 22 08:08:08 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:member:0001)(1) Options (b=63, u)
dmp Tue Sep 22 08:08:08 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:member:0001)(1) Filesystem (/vol/fg_test1__0001/.snapshot/snapshot_for_backup.1)

FlexGroup constituent (member) log example:

  • fg_test1 is a FlexGroup
  • One constituent resides on node 1, while the other resides on node 2
  • This is the log from node 2
  • As this is a constituent, dump logs the UUID and a "member" number (0002.)
  • Not all dump phases are reported here -- The "missing" dump phases are in the "master" backup log on node 1
  • There is no NDMP session recorded.  
  • The filesystem contains the constituent name fg_test1__0002, rather than the FlexGroup name, fg_test1

dmp Tue Sep 22 08:08:08 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:member:0002)(0) Start (Level 0)
dmp Tue Sep 22 08:08:08 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:member:0002)(0) Options (b=63, u)
dmp Tue Sep 22 08:08:08 EDT 2020 /vserver1/fg_test1/ (34cabf55-a5dd-469e-995f-ac9f225444cb:member:0002)(0) Filesystem (/vol/fg_test1__0002/.snapshot/snapshot_for_backup.1)
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