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From Jonathan Ballet <jbal...@edgelab.ch>
Subject Re: Rebuilding a new Cassandra node at 100Mb/s
Date Fri, 04 Dec 2015 10:39:12 GMT
Thanks for your answer Rob,

On 12/03/2015 08:32 PM, Robert Coli wrote:
> On Thu, Dec 3, 2015 at 7:51 AM, Jonathan Ballet <jballet@edgelab.ch
> <mailto:jballet@edgelab.ch>> wrote:
>
>     I noticed it's not really fast and my monitoring system shows that
>     the traffic incoming on this node is exactly at 100Mb/s (12.6MB/s).
>     I know it can be much more than that (I just tested sending a file
>     through SSH between the two machines and it goes up to 1Gb/s), is
>     there a limitation of some sort on Cassandra which limit the
>     transfer rate to 100Mb/s?
>
>
> Probably limited by number of simultaneous parallel streams. Many people
> do not want streams to go "as fast as possible" because their priority
> is maintaining baseline service times while rebuilding/bootstrapping.
>
> Not sure there's a way to tune it, but this is definitely on the "large
> node" radar..

I was actually a bit surprised that the limit seems to really be capped 
at 100 Mb/s, not more not less. So I was thinking there was something 
else playing here...

  Jonathan

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