[Lustre-discuss] two problems

[Stefano Elmopi]

Hi,

surely my action was to test environment, in a production environment,  
I would have placed
all the files before deleting the server OST1.
However, I tried to do:

unlink zero.dat

unlink: cannot unlink `zero.dat': Invalid argument

and then:

ls -lrt
total 12475308
?--------- ? ?    ?             ?            ? zero.dat
?--------- ? ?    ?             ?            ? ubuntu-9.10-dvd-i386.iso
?--------- ? ?    ?             ?            ? XXXXXXXXX_CentOS-5.4- 
x86_64-bin-DVD.iso
?--------- ? ?    ?             ?            ? Windows_XP-Capodarco.iso
?--------- ? ?    ?             ?            ? UBUNTU_CentOS-5.4- 
x86_64-bin-DVD.iso
?--------- ? ?    ?             ?            ? KK_CentOS-5.4-x86_64- 
bin-DVD.iso
?--------- ? ?    ?             ?            ? FFFFF_CentOS-5.4-x86_64- 
bin-DVD.iso
?--------- ? ?    ?             ?            ? CentOS-5.3-i386-bin- 
DVD.iso
?--------- ? ?    ?             ?            ? BBBBB_CentOS-5.4-x86_64- 
bin-DVD.iso
?--------- ? ?    ?             ?            ? BAK_CentOS-5.4-x86_64- 
bin-DVD.iso
?--------- ? ?    ?             ?            ? 2.iso

and the log messages:

Jun  3 14:05:29 mdt02prdpom kernel: LustreError: 16265:0:(lov_ea.c: 
248:lsm_unpackmd_v1()) OST index 1 missing
Jun  3 14:05:29 mdt02prdpom kernel: Lustre: 16265:0:(lov_pack.c: 
64:lov_dump_lmm_common()) objid 0x1b20017, magic 0x0bd10bd0, pattern 0x1
Jun  3 14:05:29 mdt02prdpom kernel: Lustre: 16265:0:(lov_pack.c: 
67:lov_dump_lmm_common()) stripe_size 1048576, stripe_count 1
Jun  3 14:05:29 mdt02prdpom kernel: Lustre: 16265:0:(lov_pack.c: 
84:lov_dump_lmm_objects()) stripe 0 idx 1 subobj 0x0/0x62

For the Kernel Panic console messages, I have them only as an image, I  
can attach to email ?

For the second problem:

doing tests with Quotas, when I go to run the command:

lfs quotacheck -ug /LUSTRE/
quotacheck failed: Input/output error


and the log say:

kernel: LustreError: 7103:0:(quota_check.c:251:lov_quota_check()) lov  
idx 1 inactive

Is there any suggestion ?

Thanks

Cheers, Stefano




Ing. Stefano Elmopi
Gruppo Darco - Resp. ICT Sistemi
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Il giorno 28/mag/10, alle ore 21:34, Andreas Dilger ha scritto:

> On 2010-05-27, at 04:15, Stefano Elmopi wrote:
>> A clarification on what I wrote, the command that go server MGS/MDS  
>> in Kernel Panic is:
>>
>>> My version of Lustre is 1.8.3
>>> By testing, I tried to delete a OST and replace it with another OST
>>> and now the situation is this:
>>>
>>> cat /proc/fs/lustre/lov/lustre01-mdtlov/target_obd
>>> 0: lustre01-OST0000_UUID ACTIVE
>>> 2: lustre01-OST0002_UUID ACTIVE
>>>
>>> - first problem
>>> lustre01-OST0001_UUID ACTIVE is the OST was canceled and it had  
>>> files,
>>> which of course now there are not more:
>
> Ideally, you should migrate files off the OST before deleting it.
>
>>> ls -lrt
>>> total 12475312
>>> ?--------- ? ?    ?             ?            ? zero.dat
>>> ?--------- ? ?    ?             ?            ? ubuntu-9.10-dvd- 
>>> i386.iso
>>> ?--------- ? ?    ?             ?            ?  
>>> XXXXXXXXX_CentOS-5.4-x86_64-bin-DVD.iso
>>> ?--------- ? ?    ?             ?            ? Windows_XP- 
>>> Capodarco.iso
>>> ?--------- ? ?    ?             ?            ? UBUNTU_CentOS-5.4- 
>>> x86_64-bin-DVD.iso
>>> ?--------- ? ?    ?             ?            ? KK_CentOS-5.4- 
>>> x86_64-bin-DVD.iso
>>> ?--------- ? ?    ?             ?            ? FFFFF_CentOS-5.4- 
>>> x86_64-bin-DVD.iso
>>> ?--------- ? ?    ?             ?            ? CentOS-5.3-i386-bin- 
>>> DVD.iso
>>> ?--------- ? ?    ?             ?            ? BBBBB_CentOS-5.4- 
>>> x86_64-bin-DVD.iso
>>> ?--------- ? ?    ?             ?            ? BAK_CentOS-5.4- 
>>> x86_64-bin-DVD.iso
>>> ?--------- ? ?    ?             ?            ? 2.iso
>>>
>>>
>>> I to delete them, follow these steps:
>
> You should be able to delete them from the client with "unlink  
> zero.dat", which will return an ENOENT error, but the file should be  
> gone.  No need to run lfsck at all.
>
>>> and the server MGS/MDS go to in Kernel Panic
>
> What do the MDS console messages say?  That is the root of the  
> problem.
>
> Cheers, Andreas
> --
> Andreas Dilger
> Lustre Technical Lead
> Oracle Corporation Canada Inc.
>

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