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https://issues.apache.org/jira/browse/CASSANDRA-16325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17656997#comment-17656997
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David Capwell edited comment on CASSANDRA-16325 at 1/10/23 10:46 PM:
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bq.  I think if we updated the ProgressInfo object to store the delta from the 
last time progress was called

That would be a good and welcome change... my patch stores a cache of String -> 
Long just so I can compute the delta... if streaming could do this for me then 
I can lower the memory of the listener.

bq. The only thought I have about moving the counters into the StreamingSession 
class is if there is a feature flag around per-file progress. As a user, I 
would still want metrics to report if that flag is enabled. 

There is a feature flag to disable the stream stats listener, so it makes 
complete sets not to couple it with that listener; I agree.



was (Author: dcapwell):
.bq  I think if we updated the ProgressInfo object to store the delta from the 
last time progress was called

That would be a good and welcome change... my patch stores a cache of String -> 
Long just so I can compute the delta... if streaming could do this for me then 
I can lower the memory of the listener.

.bq The only thought I have about moving the counters into the StreamingSession 
class is if there is a feature flag around per-file progress. As a user, I 
would still want metrics to report if that flag is enabled. 

There is a feature flag to disable the stream stats listener, so it makes 
complete sets not to couple it with that listener; I agree.


> Update streaming metrics incrementally
> --------------------------------------
>
>                 Key: CASSANDRA-16325
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16325
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Observability/Metrics
>            Reporter: Paulo Motta
>            Assignee: Isaac Reath
>            Priority: Normal
>              Labels: lhf
>             Fix For: 4.2
>
>          Time Spent: 10h 10m
>  Remaining Estimate: 0h
>
> Currently the inbound and outbound streamed bytes metrics are incremented 
> after each file is streamed, what doesn't represent the current number of 
> bytes streamed since it can take a long time for a large file to be streamed. 
> We should update the metric incrementally as data is streamed.



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