[EHPweb] ehpmaster AND ehpbackup

Jeremy M Fee jmfee at usgs.gov
Fri May 7 00:13:17 UTC 2010


Hello,

As part of our upcoming failover exercise, we have updated ehpbackup  
to provide a true secondary master webserver for our primary master  
webserver ehpmaster.  One change was to enable the periodic  
replication of content from ehpbackup, the same as ehpmaster.  This  
replication led to out of date content in several cases because it was  
not up to date on ehpbackup.

BOTH ehpmaster AND ehpbackup replicate content to the public web  
servers.  This provides a redundant path for content to be delivered  
to the public.  If you rely on this replication from ehpmaster, you  
MUST also push that same content to ehpbackup.  If you only push  
content to one of the master servers, and that server fails, your  
content may not reach the public.  Additionally, if your content is  
not up to date on BOTH master web servers, out of date content may  
reach the public web site.


Please contact Chris Bidwell <cbidwell at usgs.gov> if you are unable to  
connect to ehpbackup for this purpose.


Thanks,

Jeremy


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