[EHPweb] ehpmaster AND ehpbackup

[Peter Lombard]

Jeremy,

What is the significance of ehpmaster and ehpbackup for those of us who may
someday use ProductClient to push web products to you? It would be nice if
there was some documentation of how your EHP web system works.

By the way, I am still not able to connect to ehpdevel.cr.usgs.gov port 11235
from Berkeley machines.

Jeremy M Fee writes:
 > 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 replication led to out of date content in several cases because it was  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 not up to date on BOTH master web servers, out of date content may  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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