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Tue, 14 Sep 2021 12:20:45 -0400 (EDT) Subject: Re: zfs newbie To: DTD Cc: freebsd-questions@FreeBSD.ORG References: From: Dan Langille Message-ID: <2b3bd0c8-204d-2f9b-2d63-cca853f5893c@langille.org> Date: Tue, 14 Sep 2021 12:20:43 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.16; rv:52.0) Gecko/20100101 PostboxApp/7.0.49 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-Rspamd-Queue-Id: 4H88rB0Sd3z3Cwc X-Spamd-Bar: ----- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=langille.org header.s=fm2 header.b=W9ilrLAZ; dkim=pass header.d=messagingengine.com header.s=fm3 header.b=hOxwJhfe; dmarc=pass (policy=none) header.from=langille.org; spf=pass (mx1.freebsd.org: domain of dan@langille.org designates 64.147.123.21 as permitted sender) smtp.mailfrom=dan@langille.org X-Spamd-Result: default: False [-5.10 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[langille.org:s=fm2,messagingengine.com:s=fm3]; FREEFALL_USER(0.00)[dan]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:64.147.123.21]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; DWL_DNSWL_LOW(-1.00)[messagingengine.com:dkim]; RCVD_COUNT_THREE(0.00)[4]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[langille.org:+,messagingengine.com:+]; RCPT_COUNT_TWO(0.00)[2]; DMARC_POLICY_ALLOW(-0.50)[langille.org,none]; NEURAL_HAM_SHORT(-1.00)[-1.000]; RWL_MAILSPIKE_POSSIBLE(0.00)[64.147.123.21:from]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:11403, ipnet:64.147.123.0/24, country:US]; MID_RHS_MATCH_FROM(0.00)[]; MAILMAN_DEST(0.00)[freebsd-questions]; RCVD_IN_DNSWL_LOW(-0.10)[64.147.123.21:from] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 14 Sep 2021 17:06:03 -0000 DTD wrote on 9/7/21 5:51 PM: > Following the default 12.2 zfs install I got one pool (zroot) and a > dataset for each of the traditional mount points. So zfs list shows: > > NAME                 USED  AVAIL  REFER  MOUNTPOINT > zroot                279G  6.75T    88K  /zroot > zroot/ROOT          1.74G  6.75T    88K  none > zroot/ROOT/default  1.74G  6.75T  1.74G  / > zroot/tmp            176K  6.75T   176K  /tmp > zroot/usr            277G  6.75T    88K  /usr > zroot/usr/home       276G  6.75T   276G  /usr/home > zroot/usr/ports       88K  6.75T    88K  /usr/ports > zroot/usr/src        670M  6.75T   670M  /usr/src > zroot/var           47.5M  6.75T    88K  /var > zroot/var/audit       88K  6.75T    88K  /var/audit > zroot/var/crash       88K  6.75T    88K  /var/crash > zroot/var/log        820K  6.75T   820K  /var/log > zroot/var/mail      46.3M  6.75T  46.3M  /var/mail > zroot/var/tmp         88K  6.75T    88K  /var/tmp > > I had consultant configure another service for us. He set up the disk > array with one dataset. so zfs list on this system give: > > NAME    USED  AVAIL  REFER  MOUNTPOINT > zroot  2.65G  13.2T  2.62G  legacy > > From a sysadmin view I rather like the multiple datasets. Are there > advantages to one over the other? I see no advantages to me in the single dataset. What do you see from zpool status? I'm wondering if this is not directly on hardware, such as a VM under VMware.