From user-return-64556-archive-asf-public=cust-asf.ponee.io@cassandra.apache.org Wed Oct 16 15:34:13 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 0B497180644 for ; Wed, 16 Oct 2019 17:34:12 +0200 (CEST) Received: (qmail 77556 invoked by uid 500); 16 Oct 2019 15:34:07 -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 77511 invoked by uid 99); 16 Oct 2019 15:34:07 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd1-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Wed, 16 Oct 2019 15:34:07 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd1-us-west.apache.org (ASF Mail Server at spamd1-us-west.apache.org) with ESMTP id 4939FC06D5 for ; Wed, 16 Oct 2019 15:34:07 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 0.452 X-Spam-Level: X-Spam-Status: No, score=0.452 tagged_above=-999 required=6.31 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, HEADER_FROM_DIFFERENT_DOMAINS=0.25, HTML_MESSAGE=0.2, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001] autolearn=disabled Authentication-Results: spamd1-us-west.apache.org (amavisd-new); dkim=pass (2048-bit key) header.d=jonhaddad-com.20150623.gappssmtp.com Received: from mx1-ec2-va.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id Dxd8gqb50dOy for ; Wed, 16 Oct 2019 15:34:05 +0000 (UTC) Received-SPF: None (mailfrom) identity=mailfrom; client-ip=209.85.221.45; helo=mail-wr1-f45.google.com; envelope-from=jon@rustyrazorblade.com; receiver= Received: from mail-wr1-f45.google.com (mail-wr1-f45.google.com [209.85.221.45]) by mx1-ec2-va.apache.org (ASF Mail Server at mx1-ec2-va.apache.org) with ESMTPS id 25362BC890 for ; Wed, 16 Oct 2019 15:34:05 +0000 (UTC) Received: by mail-wr1-f45.google.com with SMTP id v8so28616070wrt.2 for ; Wed, 16 Oct 2019 08:34:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jonhaddad-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=lqOTiE8QmO+y13a2q26/lNF8xM/kUs6uWReYMtI8OVk=; b=hIl41qPK+KeP2nWR0J+VsAxg9cKlRC1Bt8YW1cxlx4w1It61yUOTFA3uAvQCjAwdJs SmrgPv/dWhF4YyRfHpsgk4ibWXVqAqTW8xbsaRv1JSK9tW0kFoNKZs+Ih051efQ+sx09 fo3CXcozxct6DVpO5YYSsg5irHubrTYRgWTIz/OqfOWdMBPjZoU8fzuGSY3TMLmsHOf3 YuTRCVR3D8s4TlEge6OkgB0ZJM5YGe1UFnCszRKoP2TIXWyz9xNzBvDvOSUrbEFxcOBu 8C0W3LiLY1AIb0lVDpj7ppDAymG/qG7AFzR8zomEHaVjAQOozGVhIy37BN1Gv/YST4Vu MUJw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=lqOTiE8QmO+y13a2q26/lNF8xM/kUs6uWReYMtI8OVk=; b=a7xjLplTl0Pk3tLNrscvApH3AQ29IEK75ynW3nqE3kWr4/Bq8LfNrPZt5z8UTGtnGe firuEHe+rpXGNHwoBCeYlZ4m32KCcE3txtEl3O8v2540gxSAdYr5BFDIUWpZXz5Z41O2 DyRwAVkHT6OwTodNPo1ddEbiUBKl0khVKFnH2aD5IVpZitY50ce9O914hIRhs77LTC18 LwmPRZvIR2LeBqBo7gvwdCd/Nwz1Y5UEVDC68Su32LHpET5MM18PAJfV9Z1tS8zSFTz7 atEkbKh+0Xf2vAEfwHXZQPr4Wsr5kylqMW2q+IpVl2Ltk41+6rDI0ekZVgZiv7seFnG0 jjnQ== X-Gm-Message-State: APjAAAWSSsdvMVb6qNATZhAigsc6rnj+qUqOx/AcATS7Dk/PUbRzeJCK OsdmQb+rYSsSDZxdVHw4Zg5TXNZ2v0b2k71pHd7Q81gw X-Google-Smtp-Source: APXvYqxgpQwcDRO66LAinmbRpPiP3ucg2j1087PJB+B1RqQSPr05uP8XAgslwQqaJh5aY1n0P6WzHyXhjfn/dwhuQTA= X-Received: by 2002:a5d:5043:: with SMTP id h3mr3157411wrt.332.1571240036829; Wed, 16 Oct 2019 08:33:56 -0700 (PDT) MIME-Version: 1.0 References: <902A7487-BE7D-41AC-B296-6311C12B6CC2@gmail.com> In-Reply-To: <902A7487-BE7D-41AC-B296-6311C12B6CC2@gmail.com> From: Jon Haddad Date: Wed, 16 Oct 2019 08:33:43 -0700 Message-ID: Subject: Re: cluster rolling restart To: user@cassandra.apache.org Content-Type: multipart/alternative; boundary="000000000000409fe1059508d4d0" --000000000000409fe1059508d4d0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I agree with Jeff here. Ideally you should be so comfortable with rolling restarts that they become second nature. Cassandra is designed to handle them and you should not be afraid to do them regularly. On Wed, Oct 16, 2019, 8:06 AM Jeff Jirsa wrote: > > Personally I encourage you to rolling restart from time to time, use it a= s > an opportunity to upgrade kernels and JDKs and cassandra itself and just > generally make sure things are healthy and working how you expect > > If you see latencies jump or timeouts when you=E2=80=99re bouncing, that= =E2=80=99s a > warning and you know you need to address it - doing this in advance gives > you a chance to do it while the bounce is optional and can be paused. If > you wait for a switch to fail or AWS AZ to crash, you may have problems > lurking you don=E2=80=99t know about until it=E2=80=99s too late. > > - Jeff > > > On Oct 16, 2019, at 12:56 AM, Marco Gasparini < > marco.gasparini@competitoor.com> wrote: > > > > =EF=BB=BF > > hi all, > > > > I was wondering if it is recommended to perform a rolling restart of th= e > cluster once in a while. > > Is it a good practice or necessary? how often? > > > > Thanks > > Marco > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscribe@cassandra.apache.org > For additional commands, e-mail: user-help@cassandra.apache.org > > --000000000000409fe1059508d4d0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I agree with Jeff here. Ideally you should be so comforta= ble with rolling restarts that they become second nature. Cassandra is desi= gned to handle them and you should not be afraid to do them regularly.=C2= =A0

On Wed, Oct 16, 2019, 8:06 AM Jeff Jirsa <jjirsa@gmail.com> wrote:

Personally I encourage you to rolling restart from time to time, use it as = an opportunity to upgrade kernels and JDKs and cassandra itself and just ge= nerally make sure things are healthy and working how you expect

If you see latencies jump or timeouts when you=E2=80=99re bouncing, that=E2= =80=99s a warning and you know you need to address it - doing this in advan= ce gives you a chance to do it while the bounce is optional and can be paus= ed. If you wait for a switch to fail or AWS AZ to crash, you may have probl= ems lurking you don=E2=80=99t know about until it=E2=80=99s too late.

- Jeff

> On Oct 16, 2019, at 12:56 AM, Marco Gasparini <marco.g= asparini@competitoor.com> wrote:
>
> =EF=BB=BF
> hi all,
>
> I was wondering if it is recommended to perform a rolling restart of t= he cluster once in a while.
> Is it a good practice or necessary? how often?
>
> Thanks
> Marco

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