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From: =?UTF-8?Q?Daniel_H=C3=B6lbling=2DInzko?= <daniel.hoelbling-inzko@bitmovin.com>
Date: Sat, 22 Jul 2017 14:08:54 +0000
Message-ID: <CAA4pOZLmHTVWisqVFbNMv0G+QUq5n159Fg66RB-KT6Gx=Hpf9A@mail.gmail.com>
Subject: Re: Understanding gossip and seeds
To: User <user@cassandra.apache.org>
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archived-at: Sat, 22 Jul 2017 14:09:11 -0000

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Seeds are there to bootstrap a node for the very first time when it's has
zero knowledge about the ring.

I think I also read somewhere that seed nodes are periodically queried for
some sanity checks and therefore one should not include too many nodes in
the seed list.
kurt greaves <kurt@instaclustr.com> schrieb am Sa. 22. Juli 2017 um 01:48:

> Haven't checked the code but pretty sure it's because it will always use
> the known state stored in the system tables. the seeds in the yaml are
> mostly for initial set up, used to discover the rest of the nodes in the
> ring.
>
> Once that's done there is little reason to refer to them again, unless
> forced.
>

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Seeds are there to bootstrap a node for the very first time when it&#39;s h=
as zero knowledge about the ring. <br><br>I think I also read somewhere tha=
t seed nodes are  periodically queried for some sanity checks and therefore=
 one should not include too many nodes in the seed list. <br><div class=3D"=
gmail_quote"><div dir=3D"ltr">kurt greaves &lt;<a href=3D"mailto:kurt@insta=
clustr.com">kurt@instaclustr.com</a>&gt; schrieb am Sa. 22. Juli 2017 um 01=
:48:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"auto">Haven&#39;t =
checked the code but pretty sure it&#39;s because it will always use the kn=
own state stored in the system tables. the seeds in the yaml are mostly for=
 initial set up, used to discover the rest of the nodes in the ring.<div di=
r=3D"auto"><br></div><div dir=3D"auto">Once that&#39;s done there is little=
 reason to refer to them again, unless forced.</div></div>
</blockquote></div>

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