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3 Site Replication

FIXME Documenation in Progress FIXME

As of version 8.1.11 TSM/ISP still does not provide Replication to two other sites. In this abstract I'll outline how to establish a workaround.

Set-Up

For this workaround we assume one primary server that should replicate it's data to two other sites in parallel:

 3 site replication to 2 secondary sites in parallel (3SPR)

but no no chain replication (at first glance):

3 site chain replication (3SCR)

HowTo / Approaches

3 Site Parallel Replication (3SPR)

basic idea

The idea is to break up the replication relationship to the 2nd site and redefine it, using the 3rd site. afterwards break it up again and redefinde it using the 2nd site's server defintion.

implementation

assuming one node to replicate, named 3sitepoc

replication tsm0 => tsm1
REMove    REPLNode 3sitepoc
SET       REPLSERVer tsm1
UPDate    Node 3sitepoc REPLState=ENable
REPLicate Node       3sitepoc 
replication tsm0 => tsm1
REMove    REPLNode 3sitepoc
SET       REPLSERVer tsm2
UPDate    Node       3sitepoc REPLState=ENable
REPLicate Node       3sitepoc

3 Site Chain Replication (3SCR)

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