From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx1.redhat.com (ext-mx12.extmail.prod.ext.phx2.redhat.com [10.5.110.41]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 51F2082F5F for ; Tue, 9 Jul 2019 09:48:02 +0000 (UTC) Received: from e2i64.smtp2go.com (e2i64.smtp2go.com [103.2.140.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 906A5309178C for ; Tue, 9 Jul 2019 09:47:31 +0000 (UTC) Received: from [10.45.33.53] (helo=SmtpCorp) by smtpcorp.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92-S2G) (envelope-from ) id 1hkmia-cp4XuU-JA for linux-lvm@redhat.com; Tue, 09 Jul 2019 09:47:24 +0000 Received: from [10.54.36.8] (helo=smtp.linagora.com) by smtpcorp.com with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92-S2G) (envelope-from ) id 1hkmiY-rlZGu1-Qs for linux-lvm@redhat.com; Tue, 09 Jul 2019 09:47:23 +0000 Received: from [10.75.71.198] (reverse.completel.net [92.103.166.6]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.linagora.com (Postfix) with ESMTPSA id 8F876416B8 for ; Tue, 9 Jul 2019 11:47:21 +0200 (CEST) From: Simon ELBAZ Message-ID: <2c16a06f-271b-be18-a448-48acca16519c@linagora.com> Date: Tue, 9 Jul 2019 11:47:20 +0200 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="------------E362975DC95A93848BC22225" Content-Language: en-US-large Subject: [linux-lvm] lvdisplay "open" field computing Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: To: linux-lvm@redhat.com This is a multi-part message in MIME format. --------------E362975DC95A93848BC22225 Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Transfer-Encoding: 8bit Hi, I am trying to understand how the open field is computed. On a CentOS6 server, lvdisplay has the following output: /lvdisplay /dev/mapper/vg_obm-var_spool_imap // // --- Logical volume ---// // LV Path /dev/vg_obm/var_spool_imap// // LV Name var_spool_imap// // VG Name vg_obm// // LV UUID 0oK7h0-tDZH-eUxE-AyBw-cK7x-U9pS-W7X4Uh// // LV Write Access read/write// // LV Creation host, time panoramix.ch-perrens.fr, 2015-01-16 11:03:10 +0100// // LV Status available// // # open 2// // LV Size 1,92 TiB// // Current LE 504572// // Segments 2// // Allocation inherit// // Read ahead sectors auto// // - currently set to 256// // Block device 253:3// / And dmsetup show the following info: /# dmsetup info -c | grep "253" | grep " 3"// //vg_obm-var_spool_imap 253 3 L--w 2 2 0 LVM-1i1v6pEjab2WslaDQRvkf8eLk6QfBW4J0oK7h0tDZHeUxEAyBwcK7xU9pSW7X4Uh/ Could you please give me some hint to understand how "open = 2" is obtained ? Regards/ / // -- Simon Elbaz @Linagora Mob: +33 (0) 6 38 99 18 34 Tour Franklin 31ème étage 100/101 Quartier Boieldieu 92042 La Défense FRANCE --------------E362975DC95A93848BC22225 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: 8bit

Hi,

I am trying to understand how the open field is computed.

On a CentOS6 server, lvdisplay has the following output:

lvdisplay /dev/mapper/vg_obm-var_spool_imap
--- Logical volume ---
LV Path                /dev/vg_obm/var_spool_imap
LV Name                var_spool_imap
VG Name                vg_obm
LV UUID                0oK7h0-tDZH-eUxE-AyBw-cK7x-U9pS-W7X4Uh
LV Write Access        read/write
LV Creation host, time panoramix.ch-perrens.fr, 2015-01-16 11:03:10 +0100
LV Status              available
# open                 2
LV Size                1,92 TiB
Current LE             504572
Segments               2
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           253:3

And dmsetup show the following info:

# dmsetup info -c | grep "253" | grep " 3"
vg_obm-var_spool_imap 253 3 L--w 2 2 0 LVM-1i1v6pEjab2WslaDQRvkf8eLk6QfBW4J0oK7h0tDZHeUxEAyBwcK7xU9pSW7X4Uh

Could you please give me some hint to understand how "open = 2" is obtained ?

Regards

-- 
Simon Elbaz
@Linagora
Mob: +33 (0) 6 38 99 18 34
Tour Franklin 31ème étage
100/101 Quartier Boieldieu
92042 La Défense
FRANCE

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