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symsonu's avatar
symsonu
Level 6
10 years ago

need to fix vvr replication

 

Earlier node 1 was primary and node2 was secondary

Node1 crashed and node 2 become primary.

Now, we have brought node1 up as below and below is the status of rlink

 

Please provide fix

 

 

root@node1:# vradmin -g ossdg -l repstatus ossrvg
Replicated Data Set: ossrvg
Primary:
  Host name:                  punjab_core-ossrvg
  RVG name:                   ossrvg
  DG name:                    ossdg
  RVG state:                  enabled for I/O
  Data volumes:               24
  VSets:                      0
  SRL name:                   oss_srl_vol
  SRL size:                   400.00 G
  Total secondaries:          1

Config Errors:
  delhi_core-ossrvg:      Primary-Primary configuration

root@node1:# vxprint -PV
Disk group: ossdg

TY NAME         ASSOC        KSTATE   LENGTH   PLOFFS   STATE    TUTIL0  PUTIL0
rl to_delhi_core_ossrvg ossrvg ENABLED -   -        PAUSE    -       -
rv ossrvg       -            ENABLED  -        -        ACTIVE   -       -
root@node1:/ericsson/hagcs/etc# vxprint -Pl
Disk group: ossdg

Rlink:    to_delhi_core_ossrvg
info:     timeout=500 packet_size=1452 rid=0.1329
          latency_high_mark=10000 latency_low_mark=9950
          bandwidth_limit=none
state:    state=PAUSE
          synchronous=off latencyprot=off srlprot=override
assoc:    rvg=ossrvg
          remote_host=delhi_core-ossrvg IP_addr=10.161.21.197 port=4145
          remote_dg=ossdg
          remote_dg_dgid=1374151282.15.node1
          remote_rvg_version=30
          remote_rlink=to_punjab_core_ossrvg
          remote_rlink_rid=0.7142
          local_host=punjab_core-ossrvg IP_addr=10.161.54.197 port=4145
protocol: UDP/IP
flags:    write enabled attached primary_paused consistent disconnected asynchronous

root@node1:/ericsson/hagcs/etc#

 

=========================================


root@node2:/ericsson/hagcs/etc# vradmin -g ossdg -l repstatus ossrvg
Replicated Data Set: ossrvg
Primary:
  Host name:                  delhi_core-ossrvg
  RVG name:                   ossrvg
  DG name:                    ossdg
  RVG state:                  enabled for I/O
  Data volumes:               24
  VSets:                      0
  SRL name:                   oss_srl_vol
  SRL size:                   400.00 G
  Total secondaries:          1

Config Errors:
  punjab_core-ossrvg:      Primary-Primary configuration

root@node2:/ericsson/hagcs/etc# vxprint -PV
Disk group: ossdg

TY NAME         ASSOC        KSTATE   LENGTH   PLOFFS   STATE    TUTIL0  PUTIL0
rl to_punjab_core_ossrvg ossrvg ENABLED -   -        ACTIVE   -       -
rv ossrvg       -            ENABLED  -        -        ACTIVE   -       -
root@node2:/ericsson/hagcs/etc# vxprint -Pl
Disk group: ossdg

Rlink:    to_punjab_core_ossrvg
info:     timeout=500 packet_size=1452 rid=0.7142
          latency_high_mark=10000 latency_low_mark=9950
          bandwidth_limit=none
state:    state=ACTIVE
          synchronous=off latencyprot=off srlprot=autodcm
assoc:    rvg=ossrvg
          remote_host=punjab_core-ossrvg IP_addr=10.161.54.197 port=4145
          remote_dg=ossdg
          remote_dg_dgid=1384451046.29.node2
          remote_rvg_version=30
          remote_rlink=to_delhi_core_ossrvg
          remote_rlink_rid=0.1329
          local_host=delhi_core-ossrvg IP_addr=10.161.21.197 port=4145
protocol: UDP/IP
checkpoint: point1
flags:    write enabled attached consistent disconnected asynchronous dcm_logging resync_started

root@node2:/ericsson/hagcs/etc#

 

 

Please provide me fix

  • Hi,

    Yep, the status appears as failback resync which is good ..

    Can you ensure that data is getting flushed using vxrlink command ?

    delhi_core-ossrvg# vxrlink -g <dg> -i5 status to_punjab_core_ossrvg

    monitor the same for some time, it should show the data getting reduced ..

     

    G

  • What I see is your secondary node is dcm_logging state, I would suggest to run a fbsync (refer command below)  from new primary (old secondary) as this will resync back data & will make your old primary as secondary. Once the DCM replay is complete & both nodes are in sync, you can switch back the roles using vradmin command or using a VCS GUI

    # vradmin -g <diskgroup> fbsync <rvg>

     

     

    G

  • node2 is  current primary and  old secondary

    so, current primary is dcm logging

    Hence we need to run vradmin -g <diskgroup> fbsync <rvg> on node 2

    Is it correct ?

     

  • Hi Gaurav,

     

    getting below error ?

    root@node2:/# vradmin -g <dg > fbsync rvg
    Message from Primary:
    VxVM VVR vradmin ERROR V-5-52-478 Cannot perform incremental synchronization: RLINK to_delhi_core_ossrvg on host punjab_core-ossrvg not in CONNECT state

  • I resumed the link on node1

     

    vxrlink resume and linkname

     

    it automaticaly went to below state , there was no need to execute fb synch manualy

     

    oot@node2:/# vradmin -g dg -l repstatus rvg
    Replicated Data Set: ossrvg
    Primary:
      Host name:                  delhi_core-ossrvg
      RVG name:                   ossrvg
      DG name:                    ossdg
      RVG state:                  enabled for I/O
      Data volumes:               24
      VSets:                      0
      SRL name:                   oss_srl_vol
      SRL size:                   400.00 G
      Total secondaries:          1

    Secondary:
      Host name:                  punjab_core-ossrvg
      RVG name:                   ossrvg
      DG name:                    ossdg
      Rlink from Primary:         to_punjab_core_ossrvg
      Rlink to Primary:           to_delhi_core_ossrvg
      Configured mode:            asynchronous
      Latency protection:         off
      SRL protection:             autodcm
      Data status:                inconsistent
      Replication status:         resync in progress (failback synchronization)
      Current mode:               asynchronous
      Logging to:                 DCM (contains 64865696 Kbytes) (failback logging)
      Timestamp Information:      N/A
      Bandwidth Limit:            N/A

     

     

    Is it fine ?

  • Hi,

    Yep, the status appears as failback resync which is good ..

    Can you ensure that data is getting flushed using vxrlink command ?

    delhi_core-ossrvg# vxrlink -g <dg> -i5 status to_punjab_core_ossrvg

    monitor the same for some time, it should show the data getting reduced ..

     

    G