[Ocfs2-devel] disk full when it shouldn't

[Tao Ma <tao.ma@oracle.com>]

Hi Massimo,

I just noticed anther thing.
The inode_alloc:0000 isn't full, so node1 should steal inode from node0, 
why it can't? You delete some files in node0?

Regards,
Tao

On 12/03/2010 09:22 AM, Tao Ma wrote:
> Hi Massimo,
> Massimo Cetra wrote:
>> Il 09/11/2010 02:06, Tao Ma ha scritto:
>>> Hi Massimo,
>>>
>>>  From the output, it seems that you shouldn't meet with ENOSPC problem
>>> at that time. So when you meet with ENOSPC, could you please do 'sync'
>>> first(that will sync the metadata to the disk so that stat_sysdir can
>>> output the real metadata info) and then do stat_sysdir?
>>>
>>> btw, you can also try to 'touch' one new file in your ocfs2 volume. So
>>> if it succeeds, it means that the inode_alloc is ok. Otherwise, your
>>> inode_alloc has no space. Please also try this test when you meet with
>>> ENOSPC.
>>
>> Hi Tao,
>>
>> As i supposed, the problem arose another time.
>>
>> Attached you may find the stat_sysdir output.
> Got it.
>>
>>
>> For the sake of completeness, have to say that:
>>
>> - The output of df was the following:
>>
>> # df -i
>> Filesystem             Inode   IUsati  ILib. IUso% Montato su
>> [CUT]
>> /dev/drbd2           9174751 4695156 4479595   52% /var/mail
>>
>> # df
>> Filesystem        blocchi di   1K   Usati Disponib. Uso% Montato su
>> [CUT]
>> /dev/drbd2            36699004  18780656  17918348  52% /var/mail
> I have to say that df is only an approximate way to get the real info of
> an ocfs2 volume.
> df -i use statfs(2). And since there is no easy way to calculate all the
> inodes without
> locking every node's inode allocator, it just searchs the global_bitmap
> and gives a rough number.
>
>>
>> The filesystem was not full:
>>
>> sheet3-1:/var/mail/virtual# dd if=/dev/zero of=TEST bs=1024 count=1024
>> dd: scrittura di `TEST': No space left on device
>> 1009+0 records in
>> 1008+0 records out
>> 1032192 bytes (1,0 MB) copied, 0,454305 s, 2,3 MB/s
>> sheet3-1:/var/mail/virtual#
> So this is node2? From the stat_sysdir output you attached,
> inode_alloc:0001 is full.
> It has no free inodes and the creation will fail.
>
> So you are meeting with the problem of fragmentation. Discontig block
> group should fix it.
>
> Regards,
> Tao
>
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