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There is a "Persist to file" option with the tHashOutput component where you can define a file to be used to store the data instead of in memory. I set my "Max memory heap size" to 1MB and then sent 95 MB of data into a tHashOutput component. The file was never created at any time during the operation. I don't believe this feature of this component actually works. Can anyone confirm?
I have seen it work in 3.2 but I do not see it in 4.12
yes it works.
the way you use it is first you load data into it, and then use a linked tHashInput to read it back. its a great way to cache a repeated lookup for increased performance.