Hello, I have several questions about bottleneck and replication. Could you help me please?
*1. Is master region/zone a bottleneck?* If I have understood correctly there is can be only one master region and only one master zone in a whole system. Region is the logical geographic area: country Zone is the logical grouping of one or more Ceph Object Gateway Instance(s): Data center. Ceph Object Gateway Instance: just a server in some DC. Lets imagine that we have two DC in US (east and west), two DC in Europe and two DC in Asia. US - Master Region Europe, Asia - Secondary Regions US-east - Master Zone US-west - Secondary Zone And we have several instances in Master Zone: US-east-1 US-east-2 US-east-3 In this situation people from west of US must write object in US-east and then this objects must be replicated back to the US-west. Something illogical. We just waste users time and DC in US-east will be much more loaded than all others DC in US. Okey, we can change our strategy: US-east - Master Region US-west, Europe, Asia - Secondary Regions This situation looks better but here new problems: 1) US-west, Europe, Asia will always copy data only from US-east, it will load our master DC (zone) in US-east. 2) I think it is little bit long to copy metadata through the ocean. *2. Also I haven't find information about replication between regions. Is it possible replicate real data (objects) among several regions? * Like in this situation: Somebody writes an object in US-east and after some time another guy read this object not from US-east but from Europe. *3. The last question I have is: Should we choose an instance when we write objects in a master zone or there is mechanism like round robin?* Sincerely, Alexandr
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