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https://issues.apache.org/jira/browse/CASSANDRA-7789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14112966#comment-14112966
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Tyler Hobbs commented on CASSANDRA-7789:
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+1, looks good.
> cqlsh COPY Command should display progress
> ------------------------------------------
>
> Key: CASSANDRA-7789
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7789
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Michaël Figuière
> Assignee: Mikhail Stepura
> Priority: Minor
> Labels: cqlsh
> Fix For: 2.1.1
>
> Attachments: 7789-alternate.txt, CASSANDRA-2.1-7789-v2.patch,
> CASSANDRA-2.1-7789.patch
>
>
> While CASSANDRA-7405 is on its way to make the {{COPY}} command much faster,
> it's still likely to hang for many minutes when transferring a large amount
> of data.
> This gives the feeling to the newcomers that something went wrong. Even if
> the user expect cqlsh to hang for a long moment, it's not very convenient as
> you have no idea of when the copy will be complete.
> I believe it would be very pleasant if the {{COPY}} command could display an
> in-place progress output while it's executed with probably:
> * Rows copied
> * avg Rows/s
> * CSV File R/W MB
> * avg CSV File R/W MB/s
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