From user-return-64553-archive-asf-public=cust-asf.ponee.io@cassandra.apache.org Wed Oct 16 09:10:02 2019 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [207.244.88.153]) by mx-eu-01.ponee.io (Postfix) with SMTP id BE7E0180644 for ; Wed, 16 Oct 2019 11:10:01 +0200 (CEST) Received: (qmail 87799 invoked by uid 500); 16 Oct 2019 09:09:57 -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 87787 invoked by uid 99); 16 Oct 2019 09:09:56 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd4-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Oct 2019 09:09:56 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd4-us-west.apache.org (ASF Mail Server at spamd4-us-west.apache.org) with ESMTP id 6D929C08A8 for ; Wed, 16 Oct 2019 09:09:56 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd4-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 0.001 X-Spam-Level: X-Spam-Status: No, score=0.001 tagged_above=-999 required=6.31 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.2, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=disabled Authentication-Results: spamd4-us-west.apache.org (amavisd-new); dkim=pass (2048-bit key) header.d=competitoor.com Received: from mx1-he-de.apache.org ([10.40.0.8]) by localhost (spamd4-us-west.apache.org [10.40.0.11]) (amavisd-new, port 10024) with ESMTP id ckGmDulUCHep for ; Wed, 16 Oct 2019 09:09:54 +0000 (UTC) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=78.47.47.37; helo=dedi3470.your-server.de; envelope-from=marco.gasparini@competitoor.com; receiver= Received: from dedi3470.your-server.de (dedi3470.your-server.de [78.47.47.37]) by mx1-he-de.apache.org (ASF Mail Server at mx1-he-de.apache.org) with ESMTPS id 8BEC07F609 for ; Wed, 16 Oct 2019 09:09:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=competitoor.com; s=default_1810; h=Content-Type:To:Subject:Message-ID:Date: From:In-Reply-To:References:MIME-Version:Sender:Reply-To:Cc: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=BKx4CDKdlEyjMyYFMlyuCB0cHUIjUVVz+a0D7E9zcv8=; b=uh9slsW1qwhZ4T8TE84dhBGwF oX7IVPQw/nAkyyfj/ZrLMJzroRqACMbftJK3WHMbgMBqJKEn1GNHmiTW8TBn1GBV77SOw+dYCOw2f IUT5wWfQi3RULXE0R6dNtGKfSpeo2K7KXO9E/Y8jbDTQXYe9t+rTeqgFxek/UEAZx3PNsm52yylYq lcxgWMTNALOyZwExzBq3VMlbzQ+lfABAsSW8voPKlvQIpGF4pQL78cFgg3up4Y0nPUYfJitBAM3bI TYmWqVqJjiYx0JmaA0vTjh75n1BuYS4iofj+7HYzNk5LQFeIlfMpvh8+Km3+42ioLhFEhjdTq0UnE N+MF/9Y7Q==; Received: from mail-lf1-f54.google.com ([209.85.167.54]) by dedi3470.your-server.de with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89_1) (envelope-from ) id 1iKfJZ-0002TR-8m for user@cassandra.apache.org; Wed, 16 Oct 2019 11:09:53 +0200 Received: by mail-lf1-f54.google.com with SMTP id u3so16804935lfl.10 for ; Wed, 16 Oct 2019 02:09:53 -0700 (PDT) X-Gm-Message-State: APjAAAXxS+QfjiLHbK7Eg9bbfTHARf0+dQbUJ+I7zFSp1WfQayrboiYi K7H9Q2bET6QhUTTMgAlIqYFZnxb8Yj7GHAkeW0g= X-Google-Smtp-Source: APXvYqzthNzqLltWNk1FtMxsO/xs+vU7XguYuGVV6xBpv8sbkVr68X6Eqi8678Qlix7BmfpauYiBwaEKueQmGbkDRFI= X-Received: by 2002:a19:8c05:: with SMTP id o5mr23675680lfd.53.1571216992802; Wed, 16 Oct 2019 02:09:52 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Marco Gasparini Date: Wed, 16 Oct 2019 11:09:41 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: cluster rolling restart To: user@cassandra.apache.org Content-Type: multipart/alternative; boundary="000000000000b89e430595037644" X-Authenticated-Sender: marco.gasparini@competitoor.com X-Virus-Scanned: Clear (ClamAV 0.101.4/25603/Tue Oct 15 10:57:00 2019) --000000000000b89e430595037644 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Great! Thank you very much Alain! Il giorno mer 16 ott 2019 alle ore 10:56 Alain RODRIGUEZ ha scritto: > Hello Marco, > > No this should not be a 'normal' / 'routine' thing in a Cassandra cluster= . > I can imagine it being helpful in some cases or versions of Cassandra if > they are memory issues/leaks or something like that, going wrong, but > 'normally', you should not have to do that. Even more, when doing so, > you'll have to 'warm up' C* again to get to full speed, such as loading t= he > page/key caches again and some other stuff like starting over compactions > that were interrupted might even slow down the cluster somewhat. > > Let's just say it should not harm (much), it might even be useful in some > corner cases, but restarting the cluster regularly, for no reasons, is > definitely not part of 'best practices' around Cassandra imho. > > C*heers, > ----------------------- > Alain Rodriguez - alain@thelastpickle.com > France / Spain > > The Last Pickle - Apache Cassandra Consulting > http://www.thelastpickle.com > > Le mer. 16 oct. 2019 =C3=A0 09:56, Marco Gasparini < > marco.gasparini@competitoor.com> a =C3=A9crit : > >> hi all, >> >> I was wondering if it is recommended to perform a rolling restart of the >> cluster once in a while. >> Is it a good practice or necessary? how often? >> >> Thanks >> Marco >> > --000000000000b89e430595037644 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Great!
Thank you very much Alain!

Il giorno mer 1= 6 ott 2019 alle ore 10:56 Alain RODRIGUEZ <arodrime@gmail.com> ha scritto:
=
Hello Marco,

No this should not be a 'norma= l' / 'routine' thing in a Cassandra cluster. I can imagine it b= eing helpful in some cases or versions of Cassandra if they are memory issu= es/leaks or something=C2=A0like that, going wrong, but 'normally', = you should not have to do that. Even more, when doing so, you'll have t= o 'warm up' C* again=C2=A0to get to full speed, such as loading the= page/key caches again and some other stuff like starting over compactions = that were interrupted might even slow down the cluster somewhat.
=
Let's just say it should not harm (much), it might even = be useful in some corner cases, but restarting the cluster regularly, for n= o reasons, is definitely=C2=A0not part of 'best practices' around C= assandra imho.

C*heers,
-----------= ------------
Alain Rodriguez - alain@thelastpickle.com
France / S= pain

The Last Pickle - Apache Cassandra Consulting=

Le=C2=A0mer. 16 oct. 2019 =C3= =A0=C2=A009:56, Marco Gasparini <marco.gasparini@competitoor.com> a =C3= =A9crit=C2=A0:
<= div dir=3D"ltr">
hi all,

I was wondering= if it is recommended=C2=A0to perform a rolling restart of the cluster once= in a while.=C2=A0
Is it a good practice or necessary? how often?=

Thanks
Marco
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