From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from localhost (localhost [127.0.0.1]) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTP id 325E72C85B for ; Thu, 25 Apr 2019 06:44:50 -0400 (EDT) Received: from turing.freelists.org ([127.0.0.1]) by localhost (turing.freelists.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VD3TzlbopPiv for ; Thu, 25 Apr 2019 06:44:50 -0400 (EDT) Received: from smtp38.i.mail.ru (smtp38.i.mail.ru [94.100.177.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by turing.freelists.org (Avenir Technologies Mail Multiplex) with ESMTPS id E72BD2C852 for ; Thu, 25 Apr 2019 06:44:49 -0400 (EDT) Date: Thu, 25 Apr 2019 13:44:47 +0300 From: Konstantin Osipov Subject: [tarantool-patches] Re: [PATCH v2 3/3] swim: introduce suspicion Message-ID: <20190425104447.GH29257@atlas> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: tarantool-patches-bounce@freelists.org Errors-to: tarantool-patches-bounce@freelists.org Reply-To: tarantool-patches@freelists.org List-Help: List-Unsubscribe: List-software: Ecartis version 1.0.0 List-Id: tarantool-patches List-Subscribe: List-Owner: List-post: List-Archive: To: Vladislav Shpilevoy Cc: tarantool-patches@freelists.org * Vladislav Shpilevoy [19/04/25 00:46]: > Suspicion component is a way how SWIM protects from > false-positive failure detections. When the network is slow, or > a SWIM node does not manage to process messages in time because > of being overloaded, other nodes will not receive ACKs in time, > but it is too soon to declare the member dead. > > The nodes will mark the member as suspected, and will ping it > indirectly, via other members. It 1) gives the suspected member > more time to respond on ACKs, 2) protects from the case when it > is a network problem on particular channels. > > Part of #3234 OK to push. -- Konstantin Osipov, Moscow, Russia, +7 903 626 22 32 http://tarantool.io - www.twitter.com/kostja_osipov