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How are DAOS file attachments handled in a cluster? 
I understand that DAOS places the file attachments from databases in a directory on a server.  My question is how are these file attachments handled in say a three way cluster?  Are all attachments somehow replicated as well or do they simply live on one of the cluster members?
Domino Administration / DAOS
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Bruce Elgort - over 4 years ago |  |  | Viewed 136 times
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Answer is "it depends"
 
DAOS is server independant.  Each server has its own data store for the .NLO files.  So basically cluster replication happens "as normal".  Message with attachment replicates, then DAOS kicks in and attachment is stripped.  Not all servers need to run DAOS.  A non-DAOS server can operate just dandy with a DAOS server.

Exception is in 851.
because the attachments are "read only" and filename is based on checksum value, they are going to be the same on DAOSified servers.  In cluster servers on 851 (using DAOS) the servers check to see if the filename exists already on the cluster mate.  If it is there, the attachment is not replicated. 

Details here http://www.pmooney.net/pmooney/pmooneynet.nsf/d6plinks/PMOY-7XV2VF
 
Or if you click on http://www.pmooney.net/resources you will see a DAOS "step by step" guide that I wrote with Gab Davis (includes ID Vault too)

HTH
Paul Mooney - over 4 years ago | 
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How are DAOS file attachments handled in a cluster?
Paul Mooney - over 4 years ago

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