From owner-freebsd-questions@freebsd.org Wed Oct 14 14:27:04 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 8ECDA43B03D for ; Wed, 14 Oct 2020 14:27:04 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: from mail-wm1-x32f.google.com (mail-wm1-x32f.google.com [IPv6:2a00:1450:4864:20::32f]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4CBF9M5sk5z43pf for ; Wed, 14 Oct 2020 14:27:03 +0000 (UTC) (envelope-from rwmaillists@googlemail.com) Received: by mail-wm1-x32f.google.com with SMTP id f21so2482976wml.3 for ; Wed, 14 Oct 2020 07:27:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:subject:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ueY87fw7MmGTzNxparj8OPNU7nQD68VDB0hBE9pTOsU=; b=Oj/uEvgMErc5m1jjuLQemywXmixnmHJKTlRLTqO19Aiqc9mmXVYuYC4qsG2n7ZBUDe xLUQvrRSvPkuR1Wn58OwLIEk5UcqvCT4lkJZn4W9Giumikk4DojOt+iFg2Tc5QTKPqa7 iZY/E0kIiQZ0s7lqC5VTxBdV2e1WNT0o4znJELJJHAV2adzpdaOjjxm8Hc+TLH9cvpuW HZcKMntTjs0wsG8c1Cy2TBGU3FKGw9b98NtNrwGsWBjPT1AH/TED1Mpc3uRUgtWL6sRh huP1cTiFp5z1oUyKOcD6Q7qoA4t+QAHfOFWhh2S1UQ43eEsT9IMjIMum6l9ZIWFa4W6T qEww== X-Gm-Message-State: AOAM531jI8xiOk1xGoWCci5FxsyiAra3IoI0QVcXGI0BOx6IVLBF5PcV aI/jqJCx0DxRK2Nyjzvp1c66EIHzJSjM3w== X-Google-Smtp-Source: ABdhPJwXhfGzOggSfq5e86U5KziMu5wXjTx71fREQuJX+jhA+LaEfManHyMfZ1N0h70KS89UDvIE0Q== X-Received: by 2002:a05:600c:228a:: with SMTP id 10mr3723635wmf.123.1602685621778; Wed, 14 Oct 2020 07:27:01 -0700 (PDT) Received: from gumby.homeunix.com ([2.121.231.131]) by smtp.gmail.com with ESMTPSA id n3sm4099820wmn.28.2020.10.14.07.26.59 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2020 07:27:00 -0700 (PDT) Date: Wed, 14 Oct 2020 15:26:57 +0100 From: RW To: freebsd-questions@freebsd.org Subject: Re: A couple of questions about SSDs Message-ID: <20201014152657.31e26ece@gumby.homeunix.com> In-Reply-To: <20201014113635.ce39d02e.freebsd@edvax.de> References: <20201014113635.ce39d02e.freebsd@edvax.de> X-Mailer: Claws Mail 3.17.5 (GTK+ 2.24.32; amd64-portbld-freebsd12.1) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4CBF9M5sk5z43pf X-Spamd-Bar: -- X-Spamd-Result: default: False [-2.60 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; FREEMAIL_FROM(0.00)[googlemail.com]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; TO_DN_NONE(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[googlemail.com:+]; DMARC_POLICY_ALLOW(-0.50)[googlemail.com,quarantine]; RECEIVED_SPAMHAUS_PBL(0.00)[2.121.231.131:received]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[googlemail.com]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; DWL_DNSWL_NONE(0.00)[googlemail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.97)[-0.973]; R_DKIM_ALLOW(-0.20)[googlemail.com:s=20161025]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.04)[-1.035]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_SPAM_SHORT(0.41)[0.412]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::32f:from]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-questions] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Oct 2020 14:27:04 -0000 On Wed, 14 Oct 2020 11:36:35 +0200 Polytropon wrote: > > Is anyone using Poudriere on SSDs? Are there any measures of the > > impact on wear? > > No, I'm still using rotating rust for that. ;-) > > But you're absolutely thinking into the right direction: > Running poudriere causes a lot of writes, it's not just > limited to swap (which gets activated only if RAM is full). > During ports building, lots of files are being written, > and _that_ probably is the significant question here. For any port building I do I have the work directory on tmpfs backed by swap. With enough memory this eliminates the non-essential writes to the drive leaving just the install or package writes. I don't know whether it's sensible to do this with poudiere. I gather it relies on ZFS snapshots for efficiency.