[Gluster-devel] [Gluster-users] Fwd: dht_is_subvol_filled messages on client

[Serkan Çoban]

>1. What is the out put of du -hs <back-end-export>? Please get this information for each of the brick that are part of disperse.
There are 20 bricks in disperse-56 and the du -hs output is like:
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
1.8M /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20
80K /bricks/20

I see that gluster is not writing to this disperse set. All other
disperse sets are filled 13GB but this one is empty. I see directory
structure created but no files in directories.
How can I fix the issue? I will try to rebalance but I don't think it
will write to this disperse set...



On Sat, Apr 30, 2016 at 9:22 AM, Raghavendra G <raghavendra at gluster.com> wrote:
>
>
> On Fri, Apr 29, 2016 at 12:32 AM, Serkan Çoban <cobanserkan at gmail.com>
> wrote:
>>
>> Hi, I cannot get an answer from user list, so asking to devel list.
>>
>> I am getting [dht-diskusage.c:277:dht_is_subvol_filled] 0-v0-dht:
>> inodes on subvolume 'v0-disperse-56' are at (100.00 %), consider
>> adding more bricks.
>>
>> message on client logs.My cluster is empty there are only a couple of
>> GB files for testing. Why this message appear in syslog?
>
>
> dht uses disk usage information from backend export.
>
> 1. What is the out put of du -hs <back-end-export>? Please get this
> information for each of the brick that are part of disperse.
> 2. Once you get du information from each brick, the value seen by dht will
> be based on how cluster/disperse aggregates du info (basically statfs fop).
>
> The reason for 100% disk usage may be,
> In case of 1, backend fs might be shared by data other than brick.
> In case of 2, some issues with aggregation.
>
>> Is is safe to
>> ignore it?
>
>
> dht will try not to have data files on the subvol in question
> (v0-disperse-56). Hence lookup cost will be two hops for files hashing to
> disperse-56 (note that other fops like read/write/open still have the cost
> of single hop and dont suffer from this penalty). Other than that there is
> no significant harm unless disperse-56 is really running out of space.
>
> regards,
> Raghavendra
>
>> _______________________________________________
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>> Gluster-devel at gluster.org
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>
>
>
>
> --
> Raghavendra G