[Ocfs2-users] Can not mount

[Milind Dumbare]

Master slave is no more the constraint in DRBD. With DRBD-0.8.X you can
have both nodes as master. I have tried OCFS2 on DRBD. I
formatted /dev/drbdX device with OCFS2 on both nodes. Its like runtime
data replication/mirroring from both sides.
	I mean you can have /dev/drbdX mounted on both nodes. You can modify
them and see the mirrored data on peer.

On Sat, 2006-08-12 at 11:55 -0400, Robinson Maureira Castillo wrote:
> I don't understand the point on having an OCFS2 volume that can be
> mounted rw on only one node. In that case, save yourself all the fuzz
> and hassle and install OCFS2 on just one node.
> 
> Regards,
> 
> 
> -----Original Message-----
> From: Alexei_Roudnev [mailto:Alexei_Roudnev at exigengroup.com]
> Sent: Fri 8/11/2006 8:21 PM
> To: Robinson Maureira Castillo; Milind Dumbare; tao.ma
> Cc: ocfs2-users at oss.oracle.com
> Subject: Re: [Ocfs2-users] Can not mount
> 
> RE: [Ocfs2-users] Can not mountNo, you CAN run OCFSv2 on DRBD. DRBD
> [rovides you _shared_ storage_.
> 
> But, you will have numerous time constrains and I dont think tat such
> combination can be used for anything except
> learning.
> 
> (I saw manual, how to instal OCFSv2 on DRBD.)
> 
>   ----- Original Message -----
>   From: Robinson Maureira Castillo
>   To: Milind Dumbare ; tao.ma
>   Cc: ocfs2-users at oss.oracle.com
>   Sent: Friday, August 11, 2006 2:56 PM
>   Subject: RE: [Ocfs2-users] Can not mount
> 
> 
>   I guess you can't combine DRBD and OCFS2.
> 
>   DRBD works in the following way, you create a local partition on
> both nodes, configure DRBD, when you do that it
> creates a special device /dev/drbdX or /dev/nbdX, when you start DRBD
> on the nodes, one becomes the master and the other
> becomes slave. You write to the master block device (/dev/drbdX) then
> the data is copied over the slave, and both write
> it to their undelying local storage (/dev/hda9 in your case)
> 
>   OCFS2 provides access to all nodes concurrently, so it's possible to
> format an DRBD block device as OCFS2 volume, but
> just one node can write to it, the master, in that case (just one node
> can write to the device) OCFS2 is pointless.
> 
>   If you want to try OCFS2, you need a shared storage, like shared
> SCSI bus, access to an SAN volume, iSCSI, etc. that
> can be seen as local storage on all nodes.
> 
>   Regards,
> 
>   -----Original Message-----
>   From: ocfs2-users-bounces at oss.oracle.com on behalf of Milind Dumbare
>   Sent: Fri 8/11/2006 4:21 AM
>   To: tao.ma
>   Cc: ocfs2-users at oss.oracle.com
>   Subject: Re: [Ocfs2-users] Can not mount
> 
>   Ohh, Do you have any idea how DRBD will work here?
> 
>   On Fri, 2006-08-11 at 16:11 +0800, tao.ma wrote:
>   > ocfs2 requires a shared disk. As in, all nodes must be able to
> concurrently
>   > read/write to the device.
>   > So your second node can't see "/dev/hda9" of your first node. That
> is
>   > the problem.
>   >
>   > Milind Dumbare wrote:
>   >
>   > >HI all,
>   > >     I have two nodes in cluster, my /etc/ocfs2/cluster.conf as
> follows
>   > >==============================================
>   > >     cluster:
>   > >           node_count = 2
>   > >           name = mili
>   > >     node:
>   > >           ip_port = 7777
>   > >           ip_address = 192.168.1.23
>   > >           number = 7
>   > >           name = panini
>   > >           cluster = mili
>   > >     node:
>   > >           ip_port = 7777
>   > >           ip_address = 192.168.1.22
>   > >           number = 6
>   > >           name = xenon
>   > >           cluster = mili
>   > >===============================================
>   > >I did
>   > >     #/etc/init.d/o2cb load
>   > >             &
>   > >     #/etc/init.d/o2cb start mili
>   > >
>   > >on both nodes it was successful.
>   > >
>   > >Then I did
>   > >     # mkfs.ocfs2 -b 4k -C 32K -L "drbd" -N 2 /dev/hda9
>   > >on panini it was successful too
>   > >then
>   > >     #mount -vt ocfs2 -L "test" /mnt/store/
>   > >on panini, success again.
>   > >
>   > >now when I try to mount "test" on xenon (other node) its saying
>   > >             "no such partition"
>   > >
>   > >Please help me out.
>   > >
>   > >
>   > >
>   >
>   >
>   >
>   --
>   -Milind
>   "There is no place like 127.0.0.1"
> 
> 
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> 
> 
> 
> 
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> 
-- 
-Milind
"There is no place like 127.0.0.1"