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Message Posted: Wed, 29 Aug 2001 @ 22:13:47 GMT

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Subj:   Re: Maximum number of Sessions
From:   Jorge LasHeras

I want to contribute my 2 cents. I believe both Joanne and Dave are correct, but Joanne refers to a special command which allows a systems engineer in Teradata V2 to modify options in the Teradata Gateway GDO. A Globally Distributed Object -GDO- is a data structure which is used to define global options for the Teradata configurations, you normally create/update a GDO in the PDN node, this is one of the reasons why it is called Primary Distribution Node, and then the GDO is automatically copied to each node in the MPP system. There are different types of GDOs and they belong to the /ntos directory. For instance when DBAs run the xctl utility and change an option, the write command will update the corresponding GDO and distribute it to all nodes. One should be very careful about GDOs, as they are critical system components.

In my opinion, and as Dave said, the maximum total number of sessions that can be connected by a single instance of the Teradata Gateway is 1200, independently from the fact that an option in the GDO, as Joanne said, may limit the maximum number of sessions for a specific Host Group.

Hope this helps,



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