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Sascha Lucas wrote: |
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> Just some keywords: |
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> |
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> easy with postfix: DNS round robin (solution inside DNS Server, nearly |
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> all MTAs are aware of this) |
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So DNS round robins between the two mail servers. A new mail comes into |
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server1, how does this mail make it to server2. |
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> mysql: not "multi master" ready, just redundancy "master->slave", try |
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> postgres |
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I don't see that Postgres supports multiple masters either. Circular |
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replication under Mysql may be a possibility if your db traffic isn't |
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too high. |
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> apache: behaves in sens of "read only" -> LVS |
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> |
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> cyrus: moast difficult part (shared storage/CFS,???) -> |
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> NAS|SAN+CFS+LVS+?dono? |
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The storage has to reside somewhere. If that site goes down, both |
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servers go down. You either need both servers in the same site with |
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shared storage or figure out how to do a shared nothing backend. |
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kashani |
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-- |
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