From dev-return-32385-archive-asf-public=cust-asf.ponee.io@ignite.apache.org Thu Mar 22 07:22:32 2018 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 [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id F1C51180676 for ; Thu, 22 Mar 2018 07:22:31 +0100 (CET) Received: (qmail 84740 invoked by uid 500); 22 Mar 2018 06:22:30 -0000 Mailing-List: contact dev-help@ignite.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@ignite.apache.org Delivered-To: mailing list dev@ignite.apache.org Received: (qmail 84723 invoked by uid 99); 22 Mar 2018 06:22:30 -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; Thu, 22 Mar 2018 06:22:30 +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 9EF3BC0BD1 for ; Thu, 22 Mar 2018 06:22:29 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd1-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 1.879 X-Spam-Level: * X-Spam-Status: No, score=1.879 tagged_above=-999 required=6.31 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=2, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001] autolearn=disabled Authentication-Results: spamd1-us-west.apache.org (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mx1-lw-us.apache.org ([10.40.0.8]) by localhost (spamd1-us-west.apache.org [10.40.0.7]) (amavisd-new, port 10024) with ESMTP id M8PR-raSGQY1 for ; Thu, 22 Mar 2018 06:22:27 +0000 (UTC) Received: from mail-it0-f47.google.com (mail-it0-f47.google.com [209.85.214.47]) by mx1-lw-us.apache.org (ASF Mail Server at mx1-lw-us.apache.org) with ESMTPS id 63E855FDE0 for ; Thu, 22 Mar 2018 06:22:27 +0000 (UTC) Received: by mail-it0-f47.google.com with SMTP id e195-v6so9898278ita.5 for ; Wed, 21 Mar 2018 23:22:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=WSFXSr6QyzG6pTWDDe0NuKR5o2Tq3knCKrwsp3nKQ/4=; b=tCrAl+1ePz2/dCwvZ2NdRbgPB3uHJoRttOKDeW45dsEImjj8vJMP2om0Ei4qZi8uVP J86mXmCLWGusReJpDZxWVf8XqqjmWR/AArW7x2KjQBBzHYIi1vdtDhhuGzyag3zXkKeV 5aL5HNY9pTMrF7ZW1NDIMGdMeoJu/INF3BQ4xKpSTarYMvbV10R1cR/bO6mLVsKuVW/5 7NjR2ORva5jAgUyK4Xxn82HPejTr16zRNHk8mzEZXkL6SpNenBrh+ia4+Es3knYO0UP+ 8smzIjU5aTikKqllt7iLqt3x3WIEe/BI/CNdvwjmPsOQylVxHb+g/XH++cz4tby9uMbV R8NA== 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:cc; bh=WSFXSr6QyzG6pTWDDe0NuKR5o2Tq3knCKrwsp3nKQ/4=; b=oKfSTj0YbB1VFZdrqfIHSkX3drDYniMLF1tPKc86FQ9KcK/dstoh5tCPuGUCdr+vfL /Wjgeol77nCRZU22J0hF1/HCavnGvklJKcTw50X+xC5HyQT5dRE5e2ASfMqeACiw2VIw 1INtAmXfu2/xxbBHOyAk32aDl6wtDvYFhUZwbQ1mRiO1kPGn7TvFnFbpZLVIsiVhC8YB LBMC2kiSiB50B4gV5GUM/aqc/D88douRc8HuQzE7vCFpkJ00NLSEwkY4/CDD0/KEpWUN YA1LVFwa3F4wA8KBSFEQPOTdWOnEYO1QQ5CGaw+yWJmpAgEKhb19GtV7ZHvBW9tvLDuZ 8gAA== X-Gm-Message-State: AElRT7EHCAIHnk19yEITYouz5r3kkKWtVD6ZZbrmDrlA0Hibr8OsJaE6 gMLQtOhdRpr8SsuOo8whpQZKWUEs1eJIL6RdPHE= X-Google-Smtp-Source: AG47ELv5vNvkhdWLn7RQBHOa3j6Sxdm5K2melEqo3b1z1u4cpEkn067yfDkkdZ1HbUCGRinXwg6nddROGY3vg2cTPc4= X-Received: by 2002:a24:6794:: with SMTP id u142-v6mr7300459itc.19.1521699740784; Wed, 21 Mar 2018 23:22:20 -0700 (PDT) MIME-Version: 1.0 References: <44857f780437831523c7ab8515802df3@mail.gmail.com> In-Reply-To: From: Dmitry Pavlov Date: Thu, 22 Mar 2018 06:22:10 +0000 Message-ID: Subject: Re: Ignite Direct I/O plugin description added to wiki To: Denis Magda Cc: dev Content-Type: multipart/alternative; boundary="000000000000811e910567fa5419" --000000000000811e910567fa5419 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Yes, will do. =D1=87=D1=82, 22 =D0=BC=D0=B0=D1=80. 2018 =D0=B3. =D0=B2 1:05, Denis Magda = : > Dmitriy, > > Thanks for updating the WAL section. Now it makes total sense to me. > > As for the page with JNA projects, let's get added there! Could you > contact the owners? > > -- > Denis > > > On Wed, Mar 21, 2018 at 9:27 AM, Dmitry Pavlov > wrote: > >> Denis, >> >> one more thing, can/should we mention Ignite Direct IO plugin in list of >> project using JNA here: https://github.com/java-native-access/jna >> >> Sincerely, >> Dmitriy Pavlov >> >> =D1=81=D1=80, 21 =D0=BC=D0=B0=D1=80. 2018 =D0=B3. =D0=B2 1:59, Denis Mag= da : >> >>> *Dmitriy*, thanks. Astonishing job! We'll add a section to the durable >>> memory tuning page and refer to the wiki for more details: >>> https://issues.apache.org/jira/browse/IGNITE-7466 >>> >>> Please clarify the following: >>> >>> > Direct I/O mode can't be enabled for Write Ahead Log files. However, >>> when >>> > working with plugin, WAL manager applies advising Linux systems do no= t >>> > store the data of the file in page cache as they are not required. >>> >>> >>> For me, it means that WAL always goes through the operating system I/O >>> calls. Nothing changes for the WAL. However, I'm not sure what you mean= t >>> to >>> explain by saying "when working with the plugin (Direct I/O) WAL manage= r >>> applies...". Could you rephrase it to bring more clarity? >>> >>> *Raymond,* >>> >>> >>> If Direct I/O is enabled by default it will bring down the performance = of >>> read-intensive application because, as Dmitry says, the reads bypass pa= ge >>> cache. So, I would recommend using it for write-intensive workloads and= , >>> probably, for mixed-workloads depending on the reads and writes rate. >>> >>> -- >>> Denis >>> >>> >>> On Tue, Mar 20, 2018 at 2:29 PM, Raymond Wilson < >>> raymond_wilson@trimble.com> >>> wrote: >>> >>> > Looks good! >>> > >>> > Is there any reason why this should not be a default setting if it >>> > gracefully downgrades to non-Direct IO if not supported by the OS? >>> > >>> > Thanks, >>> > Raymond. >>> > >>> > -----Original Message----- >>> > From: Dmitriy Setrakyan [mailto:dsetrakyan@apache.org] >>> > Sent: Wednesday, March 21, 2018 10:23 AM >>> > To: dev >>> > Subject: Re: Ignite Direct I/O plugin description added to wiki >>> > >>> > Thanks Dmitry, awesome work! >>> > >>> > On Wed, Mar 21, 2018 at 12:21 AM, Dmitry Pavlov >> > >>> > wrote: >>> > >>> > > Hi Igniters, >>> > > >>> > > I've added description of new plugin for Direct I/O for native >>> > > persistence ( >>> > > https://issues.apache.org/jira/browse/IGNITE-6341) to wiki >>> > > https://cwiki.apache.org/confluence/display/IGNITE/ >>> > > Ignite+Persistent+Store+-+under+the+hood#IgnitePersistentStore- >>> > > underthehood-DirectI/O >>> > > >>> > > >>> > > SIncerely, >>> > > Dmitriy Pavlov >>> > > >>> > >>> >> > --000000000000811e910567fa5419--