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From Sebastian Estevez <sebastian.este...@datastax.com>
Subject Re: Rebuilding a new Cassandra node at 100Mb/s
Date Fri, 04 Dec 2015 13:48:19 GMT
If you change stream throughput it won't affect currently running streams
but it should affect new ones.

all the best,

Sebastián
On Dec 4, 2015 5:39 AM, "Jonathan Ballet" <jballet@edgelab.ch> wrote:

> 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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