From owner-svn-src-head@freebsd.org Tue Aug 11 09:59:44 2015 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A493D99E800; Tue, 11 Aug 2015 09:59:44 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-lb0-x22d.google.com (mail-lb0-x22d.google.com [IPv6:2a00:1450:4010:c04::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 45E7F14AE; Tue, 11 Aug 2015 09:59:44 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: by lbbpu9 with SMTP id pu9so82740599lbb.3; Tue, 11 Aug 2015 02:59:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=aQyNbwJGGNgU8bf8/OL6x+RQgDfFgRpNjl2k3hDz5yQ=; b=Q/27hvcHt6rPGn0LZMFGabI1uc5gpZEVYmSOm9TlzY8nCROM8U+iXVCxRb7/9MQL3O Rb6parl0cT1tQvpBHAQmQ9lJU6T2KWw5wFrg+YEtunGbDtVuiQ9QkxDF90kTiifXywKY 79xw1gNWFav36HYNtx8Pk1WPbU/BpAcuQfQg3e7fGBm8jHu32p6MDqmBbTM7wHOr2may Fy8yO+R9TFO9lnI+TLD5xD2gr+tz7LBu+1SEHxo979X4MFXqjez9ZiGkZK6rQ9C621DU zbLcA/SWeuMQvefuc5e6TjmMnt/Y8rQmDLzd5GoyIqO5W1wJqIa76PH03Wr/UJPdsuad 3BnQ== X-Received: by 10.112.160.73 with SMTP id xi9mr24963918lbb.92.1439287182430; Tue, 11 Aug 2015 02:59:42 -0700 (PDT) Received: from mavbook.mavhome.dp.ua ([134.249.139.101]) by smtp.googlemail.com with ESMTPSA id rl1sm351674lac.14.2015.08.11.02.59.40 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 11 Aug 2015 02:59:41 -0700 (PDT) Sender: Alexander Motin Message-ID: <55C9C78A.2070707@FreeBSD.org> Date: Tue, 11 Aug 2015 12:59:38 +0300 From: Alexander Motin User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Dmitry Morozovsky CC: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: Re: svn commit: r286570 - in head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs: . sys References: <201508101034.t7AAYOtk074606@repo.freebsd.org> In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 Aug 2015 09:59:44 -0000 On 11.08.2015 12:38, Dmitry Morozovsky wrote: > Alexander, > > On Mon, 10 Aug 2015, Alexander Motin wrote: > >> Author: mav >> Date: Mon Aug 10 10:34:23 2015 >> New Revision: 286570 >> URL: https://svnweb.freebsd.org/changeset/base/286570 >> >> Log: >> MFV r277426: 5408 managing ZFS cache devices requires lots of RAM >> >> illumos/illumos-gate@89c86e32293a30cdd7af530c38b2073fee01411c > > [snip] > >> For an average blocksize of 8KB, this means that for the L2ARC, the ratio >> of metadata to data has gone down from about 2.92% to 1.56%. For a >> 'storage optimized' EC2 instance with 1600GB of SSD and 60GB of RAM, this >> means that we expect a completely full L2ARC to use (1600 GB * 0.0156) / >> 60GB = 41% of the available memory, down from 78%. > > Thanks! > > Any MFC planned please? Theoretically planned, but no specific terms yet -- too many changes. -- Alexander Motin