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BaltoStar_12467's avatar
BaltoStar_12467
Oct 28, 2014

BIG-IP : sync-failover device-group sync options

F5 BIG-IP Virtual Edition v11.4.1 (Build 635.0) LTM on ESXi

For a device-group of type sync-failover, the admin browser provides these options : 

Automatic Sync 
Full Sync
Maximum Incremental Sync Size (KB)

Could someone please explain these options ?

Are syncs on a time-schedule ?

Or are syncs triggered by any change to the primary ? Or exactly what types of changes will trigger a sync ?

Specifically, will a change to a data-group file ( e.g. add/delete a line ) trigger a sync ?

availability
BIG-IP
big-ip device management
cluster
config-sync

8 Replies

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  • NikhilB's avatar
    NikhilB
    Icon for Employee rankEmployee
    Oct 29, 2014

    Automatic Sync - Sync is automatic and not manual. Done almost immediatelly after a change is made

     

    Full Sync - if checked will do a FULL sync and if left unchecked, only an incremental sync

     

    Maximum Incremental Sync Size (KB) - 1024 - if you make more than this default value it goes into FullSync mode. (number is a variable)

     

    support.f5.com has further info on this. Hope this helps for now.

     

    • BaltoStar_12467's avatar
      BaltoStar_12467
      Nov 20, 2014
      thanks NikhilB .. what would motivate a full-sync vs an incremental-sync ? are there scenarios where an incremental-sync is not fully reliable ?
    • Zdenda's avatar
      Zdenda
      Icon for Cirrus rankCirrus
      Jun 04, 2016
      Hi, opening this after some time... I am also curious what would motivate you to select full-sync over incremental-sync?
    • Yann_Desmarest's avatar
      Yann_Desmarest
      Icon for Cirrus rankCirrus
      Jun 04, 2016
      Hi, we forced full-sync over incremental-sync because we get lot of issues with incremental since we are using many iapps. There is a known issue and should have been fixed in latest bigip version.
  • NikhilB_149913's avatar
    NikhilB_149913
    Historic F5 Account
    Oct 29, 2014

    Automatic Sync - Sync is automatic and not manual. Done almost immediatelly after a change is made

     

    Full Sync - if checked will do a FULL sync and if left unchecked, only an incremental sync

     

    Maximum Incremental Sync Size (KB) - 1024 - if you make more than this default value it goes into FullSync mode. (number is a variable)

     

    support.f5.com has further info on this. Hope this helps for now.

     

    • BaltoStar_12467's avatar
      BaltoStar_12467
      Nov 20, 2014
      thanks NikhilB .. what would motivate a full-sync vs an incremental-sync ? are there scenarios where an incremental-sync is not fully reliable ?
    • Zdenda's avatar
      Zdenda
      Icon for Cirrus rankCirrus
      Jun 04, 2016
      Hi, opening this after some time... I am also curious what would motivate you to select full-sync over incremental-sync?
    • Yann_Desmarest's avatar
      Yann_Desmarest
      Icon for Cirrus rankCirrus
      Jun 04, 2016
      Hi, we forced full-sync over incremental-sync because we get lot of issues with incremental since we are using many iapps. There is a known issue and should have been fixed in latest bigip version.