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Status Under review
Workspace Storage Protect Family
Categories Spectrum Protect (Server)
Created by Guest
Created on Mar 21, 2024

RELATED IDEAS

Server Cross-replication with Client Acceptors to both on all clients

Site fail-over/fail-back of the "restore" function (read from ISP server(s)) is already provided in the ISP server product.

Site fail-over/fail-back of the "backup" function (write to ISP server) is not.  If site A goes down, backups must be suspended or extensive manual intervention is required to continue backing up (writing backups) to an alternate site.

If two sites have the same list of NODEs, employ cross-replicating STGRULEs/SUBRULEs via NODEGROUPs, ensuring that all NODEs are replicated to their partner ISP server, and there is a Client Acceptor with stashed credentials and full configuration to both ISP servers involved in replication on each client host, then the "backup" fail-over/fail-back function is controlled solely at the ISP servers with a few administrative commands.

ISP_A

  • Backup Copy Group: STANDARD STANDARD STANDARD STANDARD destination=BA_DC
  • NODE: CLIENT_A
  • NODE: CLIENT_B
  • NODEGROUP "Rep_to_ISP_B"
    • MEMBER: CLIENT_A
  • STGRULE/SUBRULE to replicate NODEGROUP "Rep_to_ISP_B" to ISP_B
  • ASSOCIATION for CLIENT_A

ISP_B

  • Backup Copy Group: STANDARD STANDARD STANDARD STANDARD destination=BA_DC
  • NODE: CLIENT_A
  • NODE: CLIENT_B
  • NODEGROUP "Rep_to_ISP_A"
    • MEMBER: CLIENT_B
  • STGRULE/SUBRULE to replicate NODEGROUP "Rep_to_ISP_A" to ISP_A
  • ASSOCIATION for CLIENT_B

CLIENT_A

  • Client Acceptor to ISP_A
  • Client Acceptor to ISP_B

CLIENT_B

  • Client Acceptor to ISP_A
  • Client Acceptor to ISP_B

Scenario:  ISP_B goes down indefinitely (I.e. disaster)

  • CLIENT_A can backup and restore from ISP_A
  • CLIENT_B can restore from ISP_A
    • For CLIENT_B to backup to ISP_A
      • REMOVE REPLNODE
      • DEFINE ASSOCIATION
      • DEFINE NODEGROUPMEMBER
      • REPLSTATE=ENABLED
      • REPLMODE=SYNCSEND

* Graceful failover involves removing configuration from ISP_B.

Upshot: Only a few ISP server commands (not client-side configuration) are required to fail-over/fail-back the ISP NODEs' "backup" topology when these conditions exist (partner ISP servers cross-replicating).  It requires only minutes to fail-over or fail-back an entire site's backup function, instead of significant hours or days.  With scripting, the entire backup function of an ISP server could be moved in 1 minute.

Idea priority Low

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