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Hello all, This is a question I have
basically been asking, the question on why you would want to do it is failover,
the docs at http://sourceware.org/cluster/gnbd/gnbd_usage.txt
state that dm-multipath is an option for gnbd, and documents elsewhere also
indicate that GNBD can be configured as a redundancy, yet I cannot find any
documentation on how to configure it. If using LVM to make a
volume of imported gnbds is not the answer for redundancy can anyone suggest a
method that is? Im not opposed to using any other resource of cluster or GFS
but I would really like to implement a redundant solution, ( gnbd, gulm, etc.). Does anyone has an example
of a redundant solution for a cluster/gfs filesystem i.e ( gnbd, gulm etc) ? Regards, Brian Message: 9 Date: Fri, 26 Aug 2005
16:33:51 +0700 From: "Fajar A.
Nugraha" <fajar@xxxxxxxxxxxx> Subject: Re:
Re: If I have 5 GNBD server? To: linux clustering
<linux-cluster@xxxxxxxxxx> Message-ID:
<430EE1FF.6050505@xxxxxxxxxxxx> Content-Type: text/plain;
charset=ISO-8859-1; format=flowed Michael wrote: >Can anyone answer my
question? > > > I don't think LVM cares what
kind of storage it uses, as long as it's a block device. So theoretically, you can
mix local disc, FC storage, GNBD, and ATOE and combine them using LVM. You
might run into performance issues (GNBD are slower than FC disks) and
startup issues (LVM has to start after cluster and gnbd-import successfuly
start), but it should be possible. The real question is WHY you
want to do that. AFAIK, if you combine 5 gnbd
from 5 gnbd servers into one LVM, and you are accessing a volume on
that volume group, and one of the gnbd server dies (or hangs), gnbd import
will wait forever until that server is back up. So you'll have five more
single-point-of-failures. Regards, Fajar >On 8/26/05, Michael
<mikore.li@xxxxxxxxx> wrote: > > >>Hi, >> >>If I have 5 gnbd
servers in the network, each one export 1 block >>device, can I import
all gnbd devices on each gfs client, and use lvm >>to manage them as 1
shared pool, then mkfs_gfs on it? >> >>Thanks, >> >>Michael >> >> >> > > > Brian Urrutia System Administrator Price Communications Inc. There are 10 types of people in this world, those who understand binary and those who don't.
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