Data Pump - how can I take a hot export of a database?

Hi,
I have a running database, and I want to kick off an export using Data Pump. I don't want any transactions that take place once I kick off the export to be in the export file. Is this how Data pump works?
Thanks.

You can get a consistent set of data, but from ether exp or expdp, you can't get a consistent set of metadata. For example:
If you user flashback parameter, the data in the dumpfile will be data that was entered before your flashback parameter. This means that if your flashback equates to scn 1234 and someone enters data at 1235, the dumpfile will not have that new data. But, if someone creates a new table at scn 1236, that table may or may not be in the dumpfile. This is true for both exp and expdp.
Hope this helps.
Dean

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