Network Suite - Revelation Universal Driver Heavy
Frequently asked questions
What is the Universal Driver Heavy?
The UDH is client/server software designed to allow real time mirroring
of your Revelation data. It is designed to handle intensive Revelation
applications that need to scale up and have high availability. UDH permits
real-time mirroring of Linear Hash data.
What hardware requirements are there?
Two Servers, Pentium 4, 1GB RAM minimum OS needs to be 2000 or 2003
Server Directory structure for the Revelation apps need to be identical on
both servers (cannot be on the J: share on one and the G: share on another -
both need to be on G: or J:) A copy of OI 3.7.x or Arev 3.12 with multiple
users
Both machines should reside on the same switch, and have a minimum of 100
Mbps connection.
Has it been tested on 64-bit platforms?
We have not yet tested on 64-bit platforms.
Is the secondary backup maintained continuously (every time a record is
written), or does the backup to the secondary server only occur on a timed
basis(once per hour or day), or is it manually initiated?
You can do all three of these things.
Could switching to the backup server occur automatically and seamlessly
when an interruption occurs on the primary server, or would the switchover
have to be manually imitated? Could the UDH automatically switch between
servers on a timed basis to periodically test the readiness of the backup
server and detect switching problems?
At this time, the switchover cannot be done automatically. There are one
or two small changes that need to be made to the mirrored copy of OI before
it can go live. So, no, it cannot automatically switch between servers on a
timed basis.
Is the backup server (database) an exact duplicate of the primary? If
switching is necessary, are there any data or file compatibility issues
between the databases?
It is almost an exact duplicate. Because the mirror copy of OI is not
running, there are one or two steps mentioned above that need to be
performed. They include copying over .DBTs - more common in a development
environment, as well as confirming the tables are attached - which will
update the index definitions. Aside from that, there should be no data or
file compatibility issues.
User Locks: Can User Locks be freed-up without affecting anything else
on the system? Eliminate resetting the server? Could User Lock management be
set up to automatically log out an RDS that was open for >an extended period
of time (>20 min.)?
Locks can be freed up without affecting anything else on the system -
this is done with an included LH Server Manager Console. It will eliminate
resetting the server. As is, the User Lock management does not have the
capability to automatically log out a lock that has been open for an
extended period. You may be able to do this within the Console, as it is a
limited development copy of OI.
Will the UDH impact indexer cycle time or in some other way impact the
access speed of the system?
It should not impact indexer cycle time. In one of our tests, while in
development mode and running on a TS server, there was some occasional delay
in the application. The Mirror server was two switches and over forty meters
of patch cable away. We have not seen this delay on other tests, and have
not heard any reports of speed being affected from our beta testers.
Any integration issues to existing copies of OI?
You will need to run the client installation. You may need to allow
access to the Database Manager module from your runtime to allow the mirror
to attached the tables as mentioned above.
Is the UDH compatible with our current version of OpenInsight? What
about when we perform OpenInsight upgrades in the future?
The UDH is compatible with OI 3.7.4 and above. It will handle upgrades in
the future as well.
What impact is there to install the UDH software? System downtime?
Support available?
Should be minimal impact to install. It should not entail system downtime
- though anticipate making OI inaccessible to your users while configuring.
Support is included in the price.
What is the purchase price of the software? Is this a one-time fee?
Price of the software is AUD$20,000. There is a 20% annual fee, which
includes all upgrades and support.
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