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Date: Tue, 16 Oct 2012 10:03:56 -0500
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Subject: Re: what happens while node is bootstrapping?
From: Tyler Hobbs <tyler@datastax.com>
To: user@cassandra.apache.org
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On Mon, Oct 15, 2012 at 3:50 PM, Andrey Ilinykh <ailinykh@gmail.com> wrote:

> Does it mean that during bootstrapping process only replicas serve
> read requests for new node range? In other words, replication factor
> is RF-1?
>

No.  The bootstrapping node will writes for its new range while
bootstrapping as consistency optimization (more or less), but does not
contribute to the replication factor or consistency level; all of the
original replicas for that range still receive writes, serve reads, and are
the nodes that count for consistency level.  Basically, the bootstrapping
node has no effect on the existing replicas in terms of RF or CL until the
bootstrap completes.

-- 
Tyler Hobbs
DataStax <http://datastax.com/>

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<div class=3D"gmail_quote">On Mon, Oct 15, 2012 at 3:50 PM, Andrey Ilinykh =
<span dir=3D"ltr">&lt;<a href=3D"mailto:ailinykh@gmail.com" target=3D"_blan=
k">ailinykh@gmail.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x">
<div id=3D":1kk">Does it mean that during bootstrapping process only replic=
as serve<br>
read requests for new node range? In other words, replication factor<br>
is RF-1?</div></blockquote></div><br>No.=A0 The bootstrapping node will wri=
tes for its new range while bootstrapping as consistency optimization (more=
 or less), but does not contribute to the replication factor or consistency=
 level; all of the original replicas for that range still receive writes, s=
erve reads, and are the nodes that count for consistency level.=A0 Basicall=
y, the bootstrapping node has no effect on the existing replicas in terms o=
f RF or CL until the bootstrap completes.<br clear=3D"all">
<br>-- <br><font color=3D"#888888">Tyler Hobbs<span></span><br>
<a href=3D"http://datastax.com/" target=3D"_blank">DataStax</a><br></font><=
br>

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