From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <pbs-devel-bounces@lists.proxmox.com> Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) by lore.proxmox.com (Postfix) with ESMTPS id B7DCC1FF189 for <inbox@lore.proxmox.com>; Fri, 4 Apr 2025 14:20:22 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id AC7AC1DF6C; Fri, 4 Apr 2025 14:20:10 +0200 (CEST) Message-ID: <546d1c9a-f87c-40d1-af45-54b8a0b7abd9@proxmox.com> Date: Fri, 4 Apr 2025 14:20:07 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta To: Proxmox Backup Server development discussion <pbs-devel@lists.proxmox.com>, Lukas Wagner <l.wagner@proxmox.com>, Christian Ebner <c.ebner@proxmox.com> References: <20250403122732.369087-1-c.ebner@proxmox.com> <20250403122732.369087-4-c.ebner@proxmox.com> <17935971-dc70-4288-85d2-a7d125a61756@proxmox.com> Content-Language: en-GB, de-AT From: Thomas Lamprecht <t.lamprecht@proxmox.com> Autocrypt: addr=t.lamprecht@proxmox.com; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: pbs-devel-bounces@lists.proxmox.com Sender: "pbs-devel" <pbs-devel-bounces@lists.proxmox.com> Am 04.04.25 um 13:58 schrieb Lukas Wagner: > I think we could completely omit the "the capacity is set as the given value multiplied by 1024" sentence here > and consider the fact that the LRU cache size is value * 1024 an implementation detail. But once that option is available it's part of the API and not just an implementation detail anymore? > For the user, the exact number of cached digests in the backend is probably not really that important, right? > In reality, they just want some knob that they can adjust in a range from 0 (no caching) to some maximum. For some, probably even a lot, users it might be indeed enough to like double or half the number depending on if they want to improve performance or reduce memory footprint. But I know users that have a hard time working with a numerical setting without knowing what it's exactly doing on a lower level, at least for me such settings are often rather irritating, as I cannot really have a good thought process for how I'd choose the number depending on what I want to achieve. So while I agree with your underlying point, I'd still like users being able to relatively easily find out how much change translates in what impact. > Same of course applies also for the GUI patch and the log message. > > What do you think? Two alternatives: - Changes this to the shift width, i.e. the x from 2^x, similar to the ZFS setting. Makes it nice small number to configure and for most use cases the exponential nature should be still granular enough. That said, it's not very user-friendly, at least to those without some level of CS background or the like. - just drop the * 1024 factor and allow users to enter the full number, it then can be simply described as numbers of chunks which is trivial to understand and relate too. Personally I'd favor the second option, mainly because it's so simple, and having big numbers here is not that of a huge problem. ps. secret option three: adapt the human byte selector in the frontend to expose selecting kilo-chunks and mega-chunks ;-) _______________________________________________ pbs-devel mailing list pbs-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pbs-devel