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https://issues.apache.org/jira/browse/CASSANDRA-9304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14991849#comment-14991849
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Adam Holmberg commented on CASSANDRA-9304:
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bq. If this is not enough and you want to debug some more ... you can use the
2.1 patch attached
I do think we should debug more.
bq. I am receiving str objects rather than bytearray objects for blob db values.
I'm sorry I didn't key in on this earlier, but the driver never returns
bytearray for blob types. It returns the binary type of the runtime ({{str}}
for Python 2, {{bytes}} for Python 3). I don't think this should change.
I suspect that you're losing this patch when the child processes are created:
https://github.com/apache/cassandra/blob/f62d6e407d859c0c8da5283902a5153e4bd67b5c/bin/cqlsh#L678-L680
I'm sure you're aware, but the {{multiprocessing}} module has some
[Windows-related
idiosyncrasies|https://docs.python.org/2/library/multiprocessing.html?highlight=windows].
> COPY TO improvements
> --------------------
>
> Key: CASSANDRA-9304
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9304
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Jonathan Ellis
> Assignee: Stefania
> Priority: Minor
> Labels: cqlsh
> Fix For: 3.x, 2.1.x, 2.2.x
>
>
> COPY FROM has gotten a lot of love. COPY TO not so much. One obvious
> improvement could be to parallelize reading and writing (write one page of
> data while fetching the next).
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