From owner-freebsd-questions@freebsd.org Wed Aug 5 18:45:59 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 D9D713A6742 for ; Wed, 5 Aug 2020 18:45:59 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mout.kundenserver.de (mout.kundenserver.de [217.72.192.75]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "mout.kundenserver.de", Issuer "TeleSec ServerPass Class 2 CA" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4BMLDP6Rz5z45qS for ; Wed, 5 Aug 2020 18:45:57 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from r56.edvax.de ([188.102.101.6]) by mrelayeu.kundenserver.de (mreue109 [212.227.15.183]) with ESMTPA (Nemesis) id 1MGz5h-1jyfKS3z5X-00E3KO; Wed, 05 Aug 2020 20:45:48 +0200 Date: Wed, 5 Aug 2020 20:45:46 +0200 From: Polytropon To: Jacques Foucry Cc: freebsd-questions@freebsd.org Subject: Re: Question re ZFS with mixed drive speeds & types Message-Id: <20200805204546.d1bf410e.freebsd@edvax.de> In-Reply-To: <20200805182636.GD48435@mithril> References: <575C4647-8F20-4187-9B74-2D509D31A249@gmail.com> <4fefedad-5b2a-11b8-7b22-3b6162f0404f@holgerdanske.com> <20200805182636.GD48435@mithril> Reply-To: Polytropon Organization: EDVAX X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:WCZXlajXxpRMbnrL36mEtgpNBntA1QeCX/h1YjDJ4h2jHK19Ka5 MN8gPs/JuNn2GFCQBx+poCs+2sit7jR/vMIn8BnM9Y10jJ1fdxxqYQLwNVFQsuWU2eBjvXU NoR7MqUTaHpmlwrVvr6wjY/k/VJzXkk5v6ffmlXAnVaBqGs7b/XQoZoi15C7KTBRQsBOX71 +iK3RGo+RpM/cxrL0OIDQ== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:OJrXFggDOaA=:1+jvQ35H0YAeV9PKqFlOy+ +6yAoytwu1+H7J8hruC8f5gHD1/p2cL4LNatEOCqrTN0kzSsdV+EUhjV3FQT5+vmtRtQN2Hh9 BF2nFVZqyjBYDgySTAJ/aJStmGDYzy/6QM1O0drNTW77iMdjIlF/Pc8izDV59hT+bl9vfykHO b/3NTFo5l0KO3VTVC15du8uO1QxJjww2os+9+Ts1nDOYd+pAaO22auGJrvScEaFAgGqsW4F+F WNDPO/qpmFq69zYzBiUUrZcpa2AphV+FhGJKwvccRYZfp1KmJ1Vog9Pj9k7carW3ne0UaH62f ZTiVuAKE76aoTLZUYPsfPqFnCT+sZWVUeQjgFNw99mZvjpRIsGzwn++8i7lRpHvxOzOmfpqde QGDdHE+Jw80M71et9Aru1w/7b1qW+Pm2naZjcAMqYFKZkPksKoYJnqCJHTRdtWOh4wQC9ku1m x6EUeltu8KagrPJ3xAtKmojdlhwbLDE6h4TCY3ZM0J7eLQbbz+K0oCxCBgya1/kFI6Caa/J9i WD/TNWSo93aVnhXWZ8rtK8jVWiQm61ptyp4smjS8gc84dSI0Pwj6WUuXAEHo7DpKydCkygKkO qkKBZFIiFzb3r+Xcw7jGuZzigvAju19QdKttXjCLpUgPYYMnwNUu8i+dz5aDCuYEzdEiWpqJY NI8SvPXtnZwoU0Yfy/BinEnNsFZY1Hv8jhB5V3d2h2NNxZjcnGbw/3uLOdTHYb9740VPZm70+ K3/D0zvZgx0PqbjL1IaeP078zCEMDaheu0YDcnnADCbSKvZKQdLu4PcyvwPe0pCShlg5cJySb JF3sPk/jD8ic2Ti9qOnfVmrDtVknDIEJ+j1KQ5q6RMnSoQmHd6gVQmo/6gfOY/mHa+WECVF X-Rspamd-Queue-Id: 4BMLDP6Rz5z45qS X-Spamd-Bar: ++ Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=none (mx1.freebsd.org: domain of freebsd@edvax.de has no SPF policy when checking 217.72.192.75) smtp.mailfrom=freebsd@edvax.de X-Spamd-Result: default: False [2.68 / 15.00]; HAS_REPLYTO(0.00)[freebsd@edvax.de]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; MV_CASE(0.50)[]; HAS_ORG_HEADER(0.00)[]; NEURAL_HAM_SHORT(-0.31)[-0.307]; RCPT_COUNT_TWO(0.00)[2]; RECEIVED_SPAMHAUS_PBL(0.00)[188.102.101.6:received]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; ASN(0.00)[asn:8560, ipnet:217.72.192.0/20, country:DE]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.06)[-0.062]; REPLYTO_EQ_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TAGGED_RCPT(0.00)[freebsd]; MIME_GOOD(-0.10)[text/plain]; AUTH_NA(1.00)[]; DMARC_NA(0.00)[edvax.de]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_LONG(0.65)[0.649]; MID_CONTAINS_FROM(1.00)[]; RCVD_IN_DNSWL_NONE(0.00)[217.72.192.75:from]; RCVD_TLS_LAST(0.00)[]; R_SPF_NA(0.00)[no SPF record]; RWL_MAILSPIKE_POSSIBLE(0.00)[217.72.192.75:from]; RCVD_COUNT_TWO(0.00)[2] 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, 05 Aug 2020 18:45:59 -0000 On Wed, 5 Aug 2020 20:26:36 +0200, Jacques Foucry wrote: > Le mercredi 05 ao=FBt 2020 =E0 01:32:02 (-0700), David Christensen =E0 = =E9crit: > > On 2020-08-04 23:55, Greg Marsh wrote: > > > [...] > > > I ask because about 10 years ago, I was involved in a project that ha= d a HUGE storage component. Many of the vendors we brought in to pitch, inc= luding Sun, were promoting tiered storage. Sun in particular were quite pro= ud of this tech. Their system ran ZFS and had a hybrid of ssd, sas & SATA, = with the system dynamically moving data around the different speed/capacity= drives, based on their activity, all transparent to the application or use= r. Most often used data coming from the ssd & sas drives, with less active = files kept on the SATA drives. >=20 >=20 > I remember the same thing when Sun demostrate us ZFS (I was a Sunkskill at > this time). But I never tried. Sounds a bit like HSM - hierarchical storage management, implemented on IBM mainframe systems (DFHSM) and on DEC VMS for VAX and Alpha, also has been implemented on AIX and other UNIX operating systems. So decades old stuff is "new" again... ;-) --=20 Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...