[linux-lvm] LVM2 + Pair GNBD on FC4

[linux-lvm] LVM2 + Pair GNBD on FC4

[binky123]

On a standard FC4 2.6.15-1.1831_FC4smp build, I'm trying to get
LVM2(lvm2-2.01.08-2.1) to work on a pair of gnbd(gnbd-1.0.2) imported devices.  I'm able to create a volume group and logical volume
from one gnbd device and I'm able to create an XFS filesystem on it.
I then extend the volume group with another gnbd device and recreate the logical volume to use the full # of extents.  This works.  I now
try to create an XFS or an EXT3 filesystem on top of the logical
volume and the mkfs process seems to go into a disk wait mode.  ssh access to the machine is still ok, any LVM2 command will hang, sync command will hang.

Any suggestions on what is happening, debug suggestions or if anyone else has done something similar to this? Thanks.




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RE: [linux-lvm] LVM2 + Pair GNBD on FC4

[binky123]

Does anybody have any suggestions on what I can use to coalesce partitions together from 3 PC's?  I didn't have much luck over
the weekend on my tests.

Testing Summary on 3 PCs with 2 2TB real partitions each:
local 2TB                   + LVM(2 devices)     : OK
GNBD 2TB(4 imports 2 PCs)   + LVM(6 devices)     : FAIL(mkfs xfs)
GNBD 2TB(2 imports 2 PCs)   + LVM(2 devices)     : FAIL(dd ok,
                                                   mkfs xfs fails)
GNBD 2TB(2 imports 2 PCs)   + MD(2 devices)      : FAIL(dd ok,
                                                   mkfs xfs fails)
GNBD 2TB(2 imports same PC) + LVM(2 devices)     : FAIL(mkfs xfs)
GNBD 2TB(2 imports same PC) + MD(2 devices)      : FAIL(dd 100000 ct ok,
                                                   mkfs xfs fails,
                                                   mkfs ext3 fails)
GNBD 4TB(1 import linear array) + LVM(1 device)  : FAIL(mkfs xfs)
GNBD 4TB(1 import linear array)                  : FAIL(dd 5000 ct ok,
                                                   mkfs xfs fails)
GNBD 2TB(1 import)    + LVM(1 device)  : OK(dd,mkfs xfs on LVM device)
GNBD 2TB(1 import)                     : OK(dd,mkfs xfs on gnbd device)

Testing Summary on 1 PC with 2 2TB partitions and 1 PC with 4 .37GB partitions:
local 2TB                   + LVM(2 devices)     : OK
GNBD .37GB(4 imports 2 PCs) + LVM(6 devices)     : not tested
GNBD .37GB(2 imports same PC) + LVM(2 devices)   : FAIL(dd ok, mkfs xfs fails,
                                                   mkfs xfs waiting for fsync(),
                                                   mkfs reiserfs ok,
                                                   mount reiserfs fails)
GNBD .37GB(2 imports same PC) + MD(2 devices)    : OK(dd,mkfs xfs on MD device,
                                                   mkfs reiserfs ok,
                                                   mount reiserfs fails)
GNBD .74GB(1 import linear array) + LVM(1 device): FAIL(mkfs xfs fails,
                                        dd ok)
GNBD .74GB(1 import linear array)      : OK(dd,mkfs xfs on gnbd device)
GNBD .37GB(1 import)  + LVM(1 device)  : OK(dd,mkfs xfs on LVM device)
GNBD .37GB(1 import)                   : OK(dd,mkfs xfs on gnbd device)




 --- On Sat 02/25, binky123@excite.com < binky123@excite.com > wrote:
From: binky123@excite.com [mailto: binky123@excite.com]
To: linux-lvm@redhat.com
Date: Sat, 25 Feb 2006 13:01:35 -0500 (EST)
Subject: [linux-lvm] LVM2 + Pair GNBD on FC4

<br>On a standard FC4 2.6.15-1.1831_FC4smp build, I'm trying to get<br>LVM2(lvm2-2.01.08-2.1) to work on a pair of gnbd(gnbd-1.0.2) imported devices.  I'm able to create a volume group and logical volume<br>from one gnbd device and I'm able to create an XFS filesystem on it.<br>I then extend the volume group with another gnbd device and recreate the logical volume to use the full # of extents.  This works.  I now<br>try to create an XFS or an EXT3 filesystem on top of the logical<br>volume and the mkfs process seems to go into a disk wait mode.  ssh access to the machine is still ok, any LVM2 command will hang, sync command will hang.<br><br>Any suggestions on what is happening, debug suggestions or if anyone else has done something similar to this? Thanks.<br><br><br><br><br>_______________________________________________<br>Join Excite! - http://www.excite.com<br>The most personalized portal on the Web!<br><br><br>_______________________________________________<br>linux-lv!
m 
mailing list<br>linux-lvm@redhat.com<br>https://www.redhat.com/mailman/listinfo/linux-lvm<br>read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/<br>

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