From: "Christian Schröder" <cs@deriva.de>
To: linux-lvm@redhat.com
Subject: [linux-lvm] Is cLVM necessary when accessing different logical volumes on a shared iSCSI target?
Date: Tue, 2 Jul 2013 19:27:46 +0200 [thread overview]
Message-ID: <039e01ce7749$7874c6c0$695e5440$@deriva.de> (raw)
Hi list!
I have an iSCSI server (using LIO) which provides one LUN. Two client
machines each connect this same LUN. From the client's perspective, let's
say it shows up as device /dev/sda. I have then in one client created a
partition /dev/sda1 with type 8e (LVM). The partition immediately shows up
in the other client.
After that, I have created a physical LVM volume (pvcreate /dev/sda1) and a
volume group (vgcreate shared /dev/sda1). Note that I have not enabled
cluster mode for this volume group. Again, both the physical volume and the
volume group are immediately visible to the other client.
When I create in one client a logical volume in this volume group, it is
visible to the other client, but it is unavailable. This works in both
directions, i.e. I can create a logical volume in one client or the other,
and it is always visible, but unavailable to the other client.
So far, everything seems to work fine. Now my question is: Is this setup
sufficient or do I need cLVM? I have tried to install cLVM, but had some
problems, because I do not have (and probably do not need?) a cluster
manager.
Could anybody explain when cLVM is needed in general and if it is necessary
for me?
Kind regards,
Christian
------------------------------------------------------------
Deriva GmbH Financial IT and Consulting
Christian Schr�der
Gesch�ftsf�hrer
Hans-B�ckler-Stra�e 2 | D-37079 G�ttingen
Tel: +49 (0)551 489 500-42
Fax: +49 (0)551 489 500-91
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Gesch�ftsf�hrer: Dirk Baule, Christian Schr�der
next reply other threads:[~2013-07-02 17:27 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-02 17:27 Christian Schröder [this message]
2013-07-03 2:12 ` [linux-lvm] Is cLVM necessary when accessing different logical volumes on a shared iSCSI target? matthew patton
2013-07-03 13:07 ` Christian Schröder
2013-07-03 13:58 ` matthew patton
2013-07-06 12:47 ` Christian Schröder
2013-07-06 17:40 ` matthew patton
2013-07-08 10:56 ` Christian Schröder
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