From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 518C6C2D0DB for ; Mon, 27 Jan 2020 11:56:54 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1DF7B214AF for ; Mon, 27 Jan 2020 11:56:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ObalJ3F4" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1DF7B214AF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:43754 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iw30f-0000QB-C7 for qemu-devel@archiver.kernel.org; Mon, 27 Jan 2020 06:56:53 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:58526) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iw303-0008RW-HV for qemu-devel@nongnu.org; Mon, 27 Jan 2020 06:56:16 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iw302-0008KM-3Y for qemu-devel@nongnu.org; Mon, 27 Jan 2020 06:56:15 -0500 Received: from us-smtp-2.mimecast.com ([205.139.110.61]:60999 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iw301-0008K7-QA for qemu-devel@nongnu.org; Mon, 27 Jan 2020 06:56:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1580126172; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=RXtLu6tNTYnVbDY0pNesqp5p6Ys5Z4M7dK4Psle82os=; b=ObalJ3F4rvsubX2bHFSnEOvJ6l3+D7MHSiq2uuM1BnPYF4NPbP802RW1CM8+a4guC+wWiM 5PSkqUPp9SEU4hzRwar3sqeTNMz1pPepxQ5ch4F2GRXSr8h5PdOT3kngZIJUCU1WJ54nQO Y+M899nOfv6DyE1FAYxO0Frea9KaP+A= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-416-frlDbaOQNNKqOlkpO-WPbA-1; Mon, 27 Jan 2020 06:56:11 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 13B2A184BBD8; Mon, 27 Jan 2020 11:56:10 +0000 (UTC) Received: from linux.fritz.box (ovpn-117-108.ams2.redhat.com [10.36.117.108]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 7C78F85735; Mon, 27 Jan 2020 11:56:07 +0000 (UTC) Date: Mon, 27 Jan 2020 12:56:06 +0100 From: Kevin Wolf To: Markus Armbruster Subject: Re: Making QEMU easier for management tools and applications Message-ID: <20200127115606.GA5669@linux.fritz.box> References: <20191224134139.GD2710539@redhat.com> <30664f6e-81da-a6e6-9b20-037fc91290fb@redhat.com> <878slyej29.fsf@dusky.pond.sub.org> <20200123190145.GI657556@redhat.com> <2561a069-ce5f-3c30-b04e-db7cd2fcdc85@redhat.com> <871rrp474i.fsf@dusky.pond.sub.org> <20200124102743.GB824327@redhat.com> <20200124143841.GG4732@dhcp-200-226.str.redhat.com> <87sgk3x2im.fsf@dusky.pond.sub.org> MIME-Version: 1.0 In-Reply-To: <87sgk3x2im.fsf@dusky.pond.sub.org> User-Agent: Mutt/1.12.1 (2019-06-15) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-MC-Unique: frlDbaOQNNKqOlkpO-WPbA-1 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 205.139.110.61 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Daniel =?iso-8859-1?Q?P=2E_Berrang=E9?= , "Denis V. Lunev" , Cleber Rosa , Stefan Hajnoczi , qemu-devel , Eduardo Habkost , Paolo Bonzini , =?iso-8859-1?Q?Marc-Andr=E9?= Lureau , John Snow , Dominik Csapak Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Am 25.01.2020 um 11:18 hat Markus Armbruster geschrieben: > Kevin Wolf writes: >=20 > > Am 24.01.2020 um 11:27 hat Daniel P. Berrang=E9 geschrieben: > >> This is finally something I'd consider to be on a par with the > >> original QEMU syntax, before we added hierarchical data. You > >> have the minimal possible amount of syntax here. No commas, > >> no quotes, no curly brackets, etc. > > > > This seems to have the same problems as the QEMU command line (how do > > you distinguish strings from ints, from bools, from null?). >=20 > True: YAML provides only string scalars. >=20 > TOML provides strings, integers, floats, booleans, and several flavors > of time. It lacks null. >=20 > > It's > > basically just a pretty-printed version of it with the consequence that > > it needs to be stored in an external file and there is no reasonable wa= y > > to keep it in my shell history. >=20 > There is a reasonable way to keep it in my file system, though. I find > that decidedly superior. That depends a lot on your use case. If you have a long-lived production VM that you always run with the same configuration, then yes, having a config file for it in the file system is what you probably want. Currently, for this case, people directly using QEMU tend to write a script that contains the command line. I think I do have such scripts somewhere, but their number is very small. My common case is short-lived VMs with configurations that change very often between QEMU invocations. Here the command line is decidedly superior. Requiring me to create a file in the file system each time and to remember deleting it after I'm done feels about as convenient as a *nix shell that doesn't accept parameters for commands on the command line, but instead requires you to write a one-off script first and then run that. Kevin