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From david lee <iecan...@gmail.com>
Subject Re: minimum number of machines for RF=3
Date Thu, 07 Jul 2011 10:57:45 GMT
cheers~

On 7 July 2011 19:41, Watanabe Maki <watanabe.maki@gmail.com> wrote:

> It is expected behaviour and not relate on number of node.
> After the failed node bringing back, the ring will be busy by Hinted
> Handoff rewriting and Read Repair. If you run repair, all your 3 nodes need
> to build Merkel Tree, compare the hash values,  then transfer latest data to
> each other.
>
> You can tune the HH, read repair to reduce performance impact on self
> healing activities.
>
> maki
>
> On 2011/07/07, at 18:10, david lee <iecanfly@gmail.com> wrote:
>
> > hi guys,
> >
> > is there a minimum(recommended) number of machines for RF=3?
> >
> > i encountered a test result where
> > # of nodes = 3
> > RF  =  3
> > CL.READ=QUORUM
> > and when 1 node was taken out and back in after which node repair was
> run,
> > the TPS dropped significantly.
> >
> > is this behaviour expected since the RF (for the duration of when 1 node
> was taken out)
> > is higher than the # of nodes?
> >
> > cheers,
> > david
>
>

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