From: malahal@us.ibm.com
To: linux-lvm@redhat.com
Subject: Re: [linux-lvm] Mirrored LVs
Date: Fri, 23 Oct 2009 12:02:30 -0700 [thread overview]
Message-ID: <20091023190230.GA13442@us.ibm.com> (raw)
In-Reply-To: <1958a88d0910231128x2b072b48q504d56b03da39196@mail.gmail.com>
Morten Torstensen [morten@mortent.org] wrote:
> >> Why cannot the mirrorlog be stored persistently in one or more LEs in
> >> the LV? Why the need for a seperate PV for this?
> >
> > For better redundancy...
>
> In a LE it would be mirrored too and a copy would be in each mirror...
That is not possible with the current LVM code. The log can't be a
'mirror' segment. Jonathan posted few patches to place the log on
mirrored segment but the code is not in the upstream yet!
> > Use "--alloc anywhere" to place the log LV on one of them when you
> > create your mirror.
>
> Yes, but this will have the side effect of not ensuring separate PVs
> for the mirrored LV? An the mirror log would still not be mirrored, so
> in a failure situation you would still face data loss or force a fully
> resync of the mirror.
Agreed!
next prev parent reply other threads:[~2009-10-23 19:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-23 14:13 [linux-lvm] Mirrored LVs Morten Torstensen
2009-10-23 17:29 ` malahal
2009-10-23 18:28 ` Morten Torstensen
2009-10-23 19:02 ` malahal [this message]
2009-10-23 19:15 ` Alasdair G Kergon
2009-10-23 19:41 ` Morten Torstensen
2009-10-23 18:40 ` brem belguebli
2009-10-23 19:15 ` malahal
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