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RE: [grouper-users] does grouper write to its database at startup?

Chronological Thread 
  • From: Chris Hyzer <>
  • To: Hans Zandbelt <>, "" <>
  • Cc: "" <>
  • Subject: RE: [grouper-users] does grouper write to its database at startup?
  • Date: Wed, 4 Nov 2009 08:36:34 -0500
  • Accept-language: en-US
  • Acceptlanguage: en-US

We haven't been trying not to write to the DB, so its probably safer to do a
cold standby. However, if you don't have anything automatically creating
objects in the


Then I cant think of anything that would write to the DB, though again we
don't have a contract for this... :) If it is important for you, we could
discuss this at the next dev call next week.


> -----Original Message-----
> From: Hans Zandbelt
> [mailto:]
> Sent: Wednesday, November 04, 2009 4:09 AM
> To:
> Cc:
> Subject: [grouper-users] does grouper write to its database at startup?
> Hi,
> We are creating a failover setup for our grouper service by
> setting up a "hot standby" grouper (failover/slave) server instance
> next to the running grouper master instance.
> The database of the failover instance in this setup is replicated
> from the master instance and should not be written to by until the
> server is promoted to master in case of failure.
> My question is: does any of the grouper components (cq. the
> grouper-ws, grouper-api or grouper GUI) write to its database
> at startup time, ie. before any "external" interaction takes place?
> If it does not do so, we can indeed ensure a fast failover by having a
> "hot standby" Grouper instance. If it does, we would have to change
> our setup to a "cold standby",
> Regards,
> Hans.
> --
> Hans Zandbelt
> SURFnet

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