Answer Posted / tdguy
-->Fload does not support multiset tables because it does
not support duplicate rows.
-->Fload does not allow duplicate roww, because of the
restart logic.Whenever a failure occurs and restart occurs,
fload identifies the checkpoint and sends some records to
the amps which were already sent. This is because, failure
occurs at checkpoint rarely. Assume checkpoint is to be
taken every 10 rows and the failure occurs exactly while
processing at the 14th row. When Fload is restarted, it
identifies the checkpoint and sends the rows starting from
11th row. However the rows 11 to 14 will be captured as
duplicates and just counted. This can be seen in the stats
of Fload.
TOTAL DUPLICATE ROWS = 0
Though these rows are not captured, these rows are just
noted. This is the reason, Fload does not support duplicate
rows.
| Is This Answer Correct ? | 10 Yes | 2 No |
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