Pairsplit command – HP XP7 Storage User Manual
Page 178
# pairdisplay -g ora -v jnlt
JID MU CTG JNLS AP U(%) Q-Marker Q-CNT D-SZ(BLK) Seq# DOW PBW APW
001 1 0 PJNN 1 0 00000c76 20 1633672703 64034
60 300 40
002 1 0 SJNN 1 0 00000c62 20 1633672703 64035
60 300 40
001 1 0 PJNN 1 0 00000c3a 7 211506164 64045
60 300 40
002 1 0 SJNN 1 0 00000c33 7 260319089 64046
60 300 40
# pairdisplay -g horc0 -v jnl -fe
JID MU CTG JNLS AP U(%) Q-Marker Q-CNT D-SZ(BLK) Seq#
Num LDEV# CTQM
016 2 0 PJSN 1 0 0000bb1b 0 198578688 64014
1 32768 -
018 2 0 SJSN 1 0 0000bb1b 0 99283968 64014
1 32770 0000187f
017 2 0 PJSN 1 0 00000011 0 198578688 64014
1 32769 -
019 2 0 SJSN 1 0 00000011 0 99283968 64014
1 32771 0000187f
NOTE:
CTQM: Displays the last CTQ-Marker that was committed on SVOL.
pairsplit command
The pairsplit command does not change the command options for supporting Cnt Ac-J MxN
Open. However, internal behavior is different from 1x1 Cnt Ac-J or Continuous Access
Asynchronous.
(1) pairsplit -r or -rw option
•
Issues Freeze to CT group on each MCU
•
Issues Suspend & Run to make a suspending state for CT group on each MCU
•
Searches/commits a minimum matching point of the CTQ-Marker on RCU via MCU (in other
words, do Journal Restore with CTQ-Marker)
•
Repeats above until detecting an EOM (End Of Marker) marked on MCU on all RCU via MCU
•
Issues End of Suspend to terminate a suspending state, after committed with EOM (End Of
Marker) marked on MCU on all RCU
Exception: If an uncommitted state (that is, link failure) is detected while executing its operation,
then the operation of committing is aborted on keeping current CTQ-Marker level, and a suspending
state terminates without waiting for the EOM (End Of Marker).
(2) pairsplit -P option
•
Issues Freeze to CT group on each MCU
•
Issues Suspend & Run to make a suspending state for CT group on each MCU
•
Searches/commits a minimum matching point of the CTQ-Marker on RCU via MCU (in other
words, do Journal Restore with CTQ-Marker)
•
Repeats above until detecting an EOM (End Of Marker) marked on MCU on all RCU via MCU
•
Issues End of Suspend to terminate a suspending state
Exception: If an uncommitted state (that is, link failure) is detected while executing its operation,
then the operation of committing is aborted on keeping current CTQ-Marker level, and a suspending
state terminates without waiting for the EOM (End Of Marker).
178
Data replication operations with RAID Manager