[Lustre-discuss] More failover issues

[Wojciech Turek]

Yes but in given example in section 2.2.2.1 two mgsnodes are  
specified for --ost and you are specifying it for --mdt maybe that is  
the problem? Do you have combined mgs with mdt ? Do you have one file  
system or more?

Wojciech
On 12 Nov 2007, at 21:56, Robert LeBlanc wrote:

> Yes only one MGS per site, but you should be able to specify  
> multiple MGS nodes. We have done it before with 1.6.0. See http:// 
> manual.lustre.org/manual/LustreManual16_HTML/DynamicHTML-05-1.html  
> section 2.2.2.1.
>
> Robert
>
>
> On 11/12/07 2:48 PM, "Wojciech Turek" <wjt27 at cam.ac.uk> wrote:
>
>> Hi,
>>
>> I think this is because there can be only one MGS per lustre  
>> installation (this is what manual says).
>>
>> Wojciech Turek
>> On 12 Nov 2007, at 21:18, Robert LeBlanc wrote:
>>
>>>
>>>
>>> This is what I'm getting:
>>>
>>>  head2-2:~# mkfs.lustre --mkfsoptions="-O dir_index" --reformat -- 
>>> mdt --fsname=home --mgsnode=192.168.1.252 at o2ib -- 
>>> mgsnode=192.168.1.253 at o2ib --failnode=192.168.1.252 at o2ib /dev/ 
>>> mapper/ldiskd-part1
>>>
>>>     Permanent disk data:
>>>  Target:     home-MDTffff
>>>  Index:      unassigned
>>>  Lustre FS:  home
>>>  Mount type: ldiskfs
>>>  Flags:      0x71
>>>                (MDT needs_index first_time update )
>>>  Persistent mount opts: errors=remount-ro,iopen_nopriv,user_xattr
>>>  Parameters:  mgsnode=192.168.1.253 at o2ib  
>>> failover.node=192.168.1.252 at o2ib mdt.group_upcall=/usr/sbin/ 
>>> l_getgroups
>>>
>>>  device size = 972MB
>>>  formatting backing filesystem ldiskfs on /dev/mapper/ldiskd-part1
>>>          target name  home-MDTffff
>>>          4k blocks     0
>>>          options       -O dir_index -i 4096 -I 512 -q -F
>>>  mkfs_cmd = mkfs.ext2 -j -b 4096 -L home-MDTffff -O dir_index -i  
>>> 4096 -I 512 -q -F /dev/mapper/ldiskd-part1
>>>  Writing CONFIGS/mountdata
>>>
>>>
>>>  For some reason, only the last --mgsnode option is being kept.
>>>
>>>  Robert
>>>
>>>
>>>  -----Original Message-----
>>>  From: Nathan Rutman [mailto:Nathan.Rutman at Sun.COM]
>>>  Sent: Mon 11/12/2007 1:51 PM
>>>  To: Robert LeBlanc
>>>  Cc: lustre
>>>  Subject: Re: [Lustre-discuss] More failover issues
>>>
>>>  Robert LeBlanc wrote:
>>>  > In 1.6.0, when creating a MDT, you could specify multiple -- 
>>> mgsnode options
>>>  > and it would failover between them. 1.6.3 only seems to take  
>>> the last one
>>>  > and --mgsnode=192.168.1.252 at o2ib:192.168.1.253 at o2ib doesn't  
>>> seem to failover
>>>  > to the other node. Any ideas how to get around this?
>>>  >
>>>  Multiple --mgsnode parameters should work:
>>>  mkfs.lustre --mkfsoptions="-O dir_index" --reformat --mdt
>>>  --mgsnode=192.168.1.253 at o2ib --mgsnode=1 at elan --device- 
>>> size=10000 /tmp/foo
>>>
>>>     Permanent disk data:
>>>  Target:     lustre-MDTffff
>>>  Index:      unassigned
>>>  Lustre FS:  lustre
>>>  Mount type: ldiskfs
>>>  Flags:      0x71
>>>                (MDT needs_index first_time update )
>>>  Persistent mount opts: errors=remount-ro,iopen_nopriv,user_xattr
>>>  Parameters: mgsnode=192.168.1.253 at o2ib mgsnode=1 at elan
>>>
>>>  > Robert
>>>  >
>>>  > Robert LeBlanc
>>>  > College of Life Sciences Computer Support
>>>  > Brigham Young University
>>>  > leblanc at byu.edu
>>>  > (801)422-1882
>>>  >
>>>  >
>>>  > _______________________________________________
>>>  > Lustre-discuss mailing list
>>>  > Lustre-discuss at clusterfs.com
>>>  > https://mail.clusterfs.com/mailman/listinfo/lustre-discuss
>>>  >
>>>
>>>
>>>
>>>
>>> _______________________________________________
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>>> Lustre-discuss at clusterfs.com
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>>>
>>>
>>>
>>> Mr Wojciech Turek
>>> Assistant System Manager
>>> University of Cambridge
>>> High Performance Computing service
>>> email: wjt27 at cam.ac.uk
>>> tel. +441223763517
>>>
>>>
>>>
>>>
>>>
>
>
> Robert LeBlanc
> College of Life Sciences Computer Support
> Brigham Young University
> leblanc at byu.edu
> (801)422-1882
>

Mr Wojciech Turek
Assistant System Manager
University of Cambridge
High Performance Computing service
email: wjt27 at cam.ac.uk
tel. +441223763517



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