Multicast Transform and Threading in SQL Server 2008

by Allan Mitchell 19 Sep 2007 14:00
The Multicast transform in SSIS 2005 enables us to take 1 input dataset and from it generate n output datasets that are an exact copy of the input dataset which is extremely useful at times and we have used it on a number of projects. The downside is that those outputs are synchronous outputs and therefore are on the exact same thread as the input dataset. Normally a Synchronous output is good as no memory has to swap buffers and it is exceptionally quick. A problem arises if we have on one or more of those outputs a blocking Asynchronous transform. When this happens processing of the other ou... [More]

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