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Huawei SAP HANA Appliance HA and DR Scheme Configuration Guide 02

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Enabling System Replication on the HA Secondary Node

Enabling System Replication on the HA Secondary Node

Enable the system replication function for the SAP HANA on the secondary server.

Before you enable system replication for the HANA database on the secondary server, ensure that the network connection is normal and that the HANA database has been started.

The procedure is as follows:

  1. Log in to the secondary HANA node as the root user. Run the su - s00adm command to switch to the HANA database user s00adm (replace s00 with the actual database SID in lowercase).
  2. Run the HDB start command to start the HANA database and wait till the database is successfully started.

    hw00002:~ # su - s00adm
    s00adm@hw00002:/usr/sap/S00/home> HDB start
    Impromptu CCC initialization by 'rscpCInit'.
    See SAP note 1266393.
    Starting instance using: /usr/sap/S00/SYS/exe/hdb/sapcontrol -prot NI_HTTP -nr 00 -function StartWait 2700 2
    12.10.2015 15:05:28
    12.10.2015 15:06:26

  3. After the HANA database is started successfully, run the hdbnsutil -sr_enable command to enable the system replication function. If "successfully enabled" is displayed, the system replication function is successfully enabled.

    s00adm@hw00002:/usr/sap/S00/home> hdbnsutil -sr_enable
    nameserver is active, proceeding ...
    successfully enabled system as system replication source site

  4. Run the hdbnsutil -sr_state command to check the database system replication status. If the database mode is sync, this node is used as the node that synchronizes data with the DR node.

    s00adm@hw00002:/usr/sap/S00/home> hdbnsutil -sr_state
    System Replication State
    online: true
    mode: sync
    operation mode: logreplay
    site id: 2
    site name: hw00002
    is source system: true
    is secondary/consumer system: true
    has secondaries/consumers attached: false
    is a takeover active: false
    active primary site: 1
    primary masters: hw00001
    Host Mappings:
    hw00002 -> [hw00002] hw00002
    hw00002 -> [hw00001] hw00001
    Site Mappings:
    hw00001 (primary/primary)
        |---hw00002 (sync/logreplay)
    Tier of hw00001: 1
    Tier of hw00002: 2
    Replication mode of hw00001: primary
    Replication mode of hw00002: sync
    Operation mode of hw00001: primary
    Operation mode of hw00002: logreplay
    Mapping: hw00001 -> hw00002

Updated: 2019-03-30

Document ID: EDOC1100073265

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