Return-Path: X-Original-To: apmail-cassandra-user-archive@www.apache.org Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 1DCBF18550 for ; Mon, 3 Aug 2015 14:27:12 +0000 (UTC) Received: (qmail 79779 invoked by uid 500); 3 Aug 2015 14:27:09 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 79745 invoked by uid 500); 3 Aug 2015 14:27:09 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 79735 invoked by uid 99); 3 Aug 2015 14:27:09 -0000 Received: from Unknown (HELO spamd3-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 03 Aug 2015 14:27:09 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org) with ESMTP id D8B68198B26 for ; Mon, 3 Aug 2015 14:27:08 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 3.129 X-Spam-Level: *** X-Spam-Status: No, score=3.129 tagged_above=-999 required=6.31 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, HTML_MESSAGE=3, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001] autolearn=disabled Authentication-Results: spamd3-us-west.apache.org (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mx1-us-west.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id 9wCbmYXPq_IK for ; Mon, 3 Aug 2015 14:27:07 +0000 (UTC) Received: from mail-ob0-f174.google.com (mail-ob0-f174.google.com [209.85.214.174]) by mx1-us-west.apache.org (ASF Mail Server at mx1-us-west.apache.org) with ESMTPS id 406BD20595 for ; Mon, 3 Aug 2015 14:27:07 +0000 (UTC) Received: by obnw1 with SMTP id w1so99808755obn.3 for ; Mon, 03 Aug 2015 07:27:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=m2FCqRjWMs5HGvj4VOHJUbWmfxB7U5O9ntLS5ztDxHk=; b=1AT2n0ly9/0l/swVBK2Yx9dTQgHG2QOpDR5NtziNjqGhY+HmxbYmuVMmkYudJDkH5V vqQphP0XoU8IbppOhE8Q/XMzQWMFXsMVy7h2Yy0gToh6l7SGQAGd6isR+xBZhH4QveqQ zBLQiTDh4VvCR1Lv1B4xvABcivfkXYWNWNp2hdz0P4Sfe0quK+6uRYkITpieetc16OYD QW1F/9rKvSe8TriJnIzIxLIvTy0wiLKzl2q2wZ7HgGdZb65IEDtbQHnFiEeY5SJ4FlaT axqDX1Bj9vVpQQ9ytX01knov7ZRBHRfyk3X1xT31uv4vr8RxgrvxZpsPJT9dZIjVnKpn jb0Q== MIME-Version: 1.0 X-Received: by 10.60.135.227 with SMTP id pv3mr17283807oeb.20.1438612026710; Mon, 03 Aug 2015 07:27:06 -0700 (PDT) Received: by 10.76.72.1 with HTTP; Mon, 3 Aug 2015 07:27:06 -0700 (PDT) Date: Mon, 3 Aug 2015 15:27:06 +0100 Message-ID: Subject: Understanding gossip protocol in cassandra From: Thouraya TH To: user@cassandra.apache.org Content-Type: multipart/alternative; boundary=047d7b414292d2948f051c68f6f2 --047d7b414292d2948f051c68f6f2 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi all, Please, i try to undestand how gossip protocol is used in cassandra. I read this: =E2=80=9CThis is most critical the first time a node starts up. By default,= a node remembers other nodes it has gossiped with between subsequent restarts. *Th= e seed node designation has no purpose other than bootstrapping the gossip process* for new nodes joining the cluster. Seed nodes are not a single point of failure, nor do they have any other special purpose in cluster operations beyond the bootstrapping of nodes. =E2=80=9C I understand that the seed node starst gossip protocol and then, the new nodes join the seed node i.e send their state informations to the seed node Then, the seed node broadcast received informations to all nodes on the ring ? That=E2=80=99s it ? Thank you so much for all explanations. Best Reagrds. --047d7b414292d2948f051c68f6f2 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Hi all,


Please, i try to undestand how gossip protocol is used in cassandra.


I read this:=C2=A0 =


=

=E2=80=9CThis is most c= ritical the first time a node starts up. By default, a node remembers other nodes it has gossiped with between subseque= nt restarts. The seed node designation has no purpose other than bootstrapp= ing the gossip process for new nodes joining the cluster. Seed nodes are no= t a single point of failure, nor do they have any other special purpose in clus= ter operations beyond the bootstrapping of nodes.

=E2=80=9C

I understand that the seed node starst gossip protoc= ol and then, the new nodes join the seed node i.e send their state informations to= the seed node

Then, the seed node broadcast received informations = to all nodes on the ring ?

That=E2=80=99s it ?



Thank you so much f= or all explanations.

Best Reagrds.

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