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Date: Fri, 10 Oct 2014 10:14:03 +0200
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Subject: Re: Two question about flink
From: Ufuk Celebi <uce@apache.org>
To: "user@flink.incubator.apache.org" <user@flink.incubator.apache.org>
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Hey! Thanks for writing!

On Friday, October 10, 2014, hustjackie <hustjackie@gmail.com> wrote:
>
> 1. in cluster mode, if one node has crash, what's the failover? is there
> one mechanism to guarantees fault-tolerance?
>

We currently support coarse-grained fault tolerance via program restarts.
This will be soon extended to more fine grained fault tolerance, where only
necessary parts of a program are re-executed.


> 2. is there a performance report?
>

There are some new performance numbers coming up soon. I think there are
also some older numbers from Robert. Let's wait what he has to say.

=E2=80=93 Ufuk

>

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Hey! Thanks for writing!<br><br>On Friday, October 10, 2014, hustjackie &lt=
;<a href=3D"mailto:hustjackie@gmail.com">hustjackie@gmail.com</a>&gt; wrote=
:<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1=
px #ccc solid;padding-left:1ex"><div style=3D"MARGIN:10px">
<div style=3D"FONT-SIZE:14pt;FONT-FAMILY:Arial;COLOR:#000000">1. in cluster=
=20
mode, if one node has crash, what&#39;s the failover? is there one mechanis=
m to=20
<span style=3D"WHITE-SPACE:normal;WORD-SPACING:0px;TEXT-TRANSFORM:none;FLOA=
T:none;COLOR:#000000;FONT:14pt/25px Arial;DISPLAY:inline!important;LETTER-S=
PACING:normal;TEXT-INDENT:0px">guarantees=20
fault-tolerance?</span></div><div style=3D"FONT-SIZE:14pt;FONT-FAMILY:Arial=
;COLOR:#000000"></div></div></blockquote><div><br></div><div>We currently s=
upport coarse-grained fault tolerance via program restarts. This will be so=
on extended to more fine grained fault tolerance, where only necessary=C2=
=A0parts of a program are re-executed.</div><div>=C2=A0</div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex"><div style=3D"MARGIN:10px"><div style=3D"FONT-SIZE:14pt;FO=
NT-FAMILY:Arial;COLOR:#000000"></div>
<div><span style=3D"WHITE-SPACE:normal;WORD-SPACING:0px;TEXT-TRANSFORM:none=
;FLOAT:none;COLOR:#000000;FONT:14pt/25px Arial;DISPLAY:inline!important;LET=
TER-SPACING:normal;TEXT-INDENT:0px">2.=20
is there a performance report?</span></div><div></div></div></blockquote><d=
iv><br></div><div>There are some new=C2=A0performance numbers coming up soo=
n. I think there are also some older numbers from Robert. Let&#39;s wait wh=
at he has to say.</div><div><br></div><div>=E2=80=93 Ufuk</div><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex">
</blockquote>

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