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From "Gary Dusbabek (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-1489) Expose progress made on PendingStreams through JMX
Date Thu, 09 Sep 2010 20:58:33 GMT


Gary Dusbabek commented on CASSANDRA-1489:

as observed from the sender or receiver?  From the receiver this shouldn't be too hard, but
from the sender it gets difficult, especially when the PendingFile.sections are not very granular.

An idea I had some time ago was to let the receiver send periodic feedback messages to the
sender ("I've read x bytes").  

BTW, it used to track octets before we switched to sending file sections instead of entire

> Expose progress made on PendingStreams through JMX
> --------------------------------------------------
>                 Key: CASSANDRA-1489
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>    Affects Versions: 0.7 beta 1, 0.7 beta 2, 0.7.0, 0.7.1, 0.8
>            Reporter: paul cannon
>            Priority: Minor
>   Original Estimate: 2h
>  Remaining Estimate: 2h
> So I thought originally that the pairs of numbers shown after filenames returned from
org.apache.cassandra.service:type=StreamingService's getOutgoingFiles/getIncomingFiles calls
were (octetsSent, totalSizeInOctets).  Now I know that they are ranges, and that there can
be several of them with one file, and that makes sense, but there doesn't seem to be any way
to query the progress made on a PendingFile stream.
> We would very much like to be able to inspect that from the outside, in whatever way
makes sense.

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