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identity=mailfrom; envelope-from="adr@SDF.ORG"; helo=mx.sdf.org; client-ip=205.166.94.24 Received: from mx.sdf.org (mx.sdf.org [205.166.94.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by tb-mx1.topicbox.com (Postfix) with ESMTPS for <9fans@9fans.net>; Fri, 25 Jun 2021 12:45:56 -0400 (EDT) (envelope-from adr@SDF.ORG) Received: from sdf.org (IDENT:adr@sdf.org [205.166.94.16]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 15PGjt5c027335 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO) for <9fans@9fans.net>; Fri, 25 Jun 2021 16:45:56 GMT Received: from localhost (adr@localhost) by sdf.org (8.15.2/8.12.8/Submit) with ESMTP id 15PGjtsK007350 for <9fans@9fans.net>; Fri, 25 Jun 2021 16:45:55 GMT Date: Fri, 25 Jun 2021 16:45:55 +0000 (UTC) To: 9fans@9fans.net Subject: Re: [9fans] full fossil follies In-Reply-To: Message-ID: References: <2541a4a20e075ea90386c8d5e633e58b@hamnavoe.com> <20210625151739.GA11215@polynum.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format="flowed" Topicbox-Policy-Reasoning: allow: sender is a member Topicbox-Message-UUID: d41e6632-d5d4-11eb-a477-f632397ba071 Archived-At: =?UTF-8?B?PGh0dHBzOi8vOWZhbnMudG9waWNib3guY29tL2dyb3Vwcy85?= =?UTF-8?B?ZmFucy9UNGVjNjJlZDAzYTkxZDdhNC1NNDk4N2Q1ODBhZWE3YWNlMDQ4NzJj?= =?UTF-8?B?NTg0Pg==?= From: "adr via 9fans" <9fans@9fans.net> List-Help: List-Id: "9fans" <9fans.9fans.net> List-Post: List-Software: Topicbox v0 List-Subscribe: Precedence: list Reply-To: 9fans <9fans@9fans.net> Content-Transfer-Encoding: quoted-printable List-Unsubscribe: , Topicbox-Delivery-ID: 2:9fans:437d30aa-c441-11e9-8a57-d036212d11b0:522be890-2105-11eb-b15e-8d699134e1fa:M4987d580aea7ace04872c584:1:r4ta23kdA3wmWha1W-lGbS-Y32Leobk-tUSmKFk8fKE > I don't think there is need of superuser concept here. What I'm > imagining, again, without having seen the source code, is something > like this: > > The file system is formatted and data representing the structure of > the file system are stored normally. > > At execution time, the file server check a flag stored in some > place to see if the system is full. If not, the data is changed so > the blocks are "hidden" and execution continues. > > If the system is full, the file system starts a console session > presenting the last file edited. At the end of the session, if the > number of free blocks is bigger than the reserved blocks, the blocks are > "hidden" and execution continues. If not, the console session gives > an error and continues. > > The flag can be turn on at the same place the error of file system > full is triggered. In a multi-user environment you can make the file system do something similar when the system is full, but instead of starting a console session, delete the last file modified and presenting the user an error. ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T4ec62ed03a91d7a4-M4987d= 580aea7ace04872c584 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription