From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 53B13693EB for ; Mon, 26 Jul 2021 10:43:48 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 4A83AA252 for ; Mon, 26 Jul 2021 10:43:48 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id CE2E3A244 for ; Mon, 26 Jul 2021 10:43:47 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 9E38642658 for ; Mon, 26 Jul 2021 10:43:47 +0200 (CEST) Date: Mon, 26 Jul 2021 10:43:40 +0200 (CEST) From: Dietmar Maurer To: Dominik Csapak , Proxmox Backup Server development discussion Message-ID: <1781641437.1181.1627289020670@webmail.proxmox.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Priority: 3 Importance: Normal X-Mailer: Open-Xchange Mailer v7.10.5-Rev16 X-Originating-Client: open-xchange-appsuite X-SPAM-LEVEL: Spam detection results: 0 AWL 0.806 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: Re: [pbs-devel] [PATCH proxmox-backup v2 0/7] improve catalog handling X-BeenThere: pbs-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox Backup Server development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Jul 2021 08:43:48 -0000 > On 07/26/2021 10:37 AM Dominik Csapak wrote: > > > On 7/26/21 10:26 AM, Dietmar Maurer wrote: > > > >> On 07/22/2021 3:40 PM Dominik Csapak wrote: > >> > >> this series combines my previous catalog related patch-series[0][1][2] > >> > >> changes the catalog interface to be more concise, optimizes catalog > >> commit calls during restore, and implements a fast catalog for the > >> gui which only contains the snapshot lists > >> > >> changes from v1: > >> * only write snapshot list in new 'finish' method of the catalog > >> * add 'finish' also to pool writer > >> * replace pending offset counter with reducing the chunk_archive > >> interface of the catalog > > > > Now, during tape backup, users do not see any progress on the GUI. This > > can be particularly confusing on long running tape backups. > > > > A simpler approach would be to only generate cache files for "finished" tapes (content > > will never change), while using the original catalog for tapes still writable. This should > > be much easier to implement? > > > > yes it would be simpler, but this does not completely solve the issue of > slow reads on large slow catalogs? (the last tape of the media-set can > still be so big that the reads take too long?) I thought the performance problem is on media-sets with many tapes. A single catalog should not cause a large delay?