[Gluster-users] Quota list not reflecting disk usage
Manikandan Selvaganesh
mselvaga at redhat.com
Mon Jan 25 20:01:10 UTC 2016
Hi Steve,
Could you send us the glusterfs logs, it could help us debug the issue!!
--
Thanks & Regards,
Manikandan Selvaganesh.
----- Original Message -----
From: "Steve Dainard" <sdainard at spd1.com>
To: "Manikandan Selvaganesh" <mselvaga at redhat.com>
Cc: "gluster-users at gluster.org List" <gluster-users at gluster.org>
Sent: Tuesday, January 26, 2016 12:56:22 AM
Subject: Re: [Gluster-users] Quota list not reflecting disk usage
Something is seriously wrong with the quota output:
# gluster volume quota storage list
Path Hard-limit Soft-limit Used
Available Soft-limit exceeded? Hard-limit exceeded?
---------------------------------------------------------------------------------------------------------------------------
/projects-CanSISE 10.0TB 80% 27.8TB
0Bytes Yes Yes
/data4/climate 105.0TB 80% 307.1TB
0Bytes Yes Yes
/data4/forestry 50.0GB 80% 61.9GB
0Bytes Yes Yes
/data4/projects 800.0GB 80% 2.0TB
0Bytes Yes Yes
/data4/strays 85.0GB 80% 230.5GB
0Bytes Yes Yes
/data4/gis 2.2TB 80% 6.3TB
0Bytes Yes Yes
/data4/modperl 1.0TB 80% 953.2GB
70.8GB Yes No
/data4/dem 1.0GB 80% 0Bytes
1.0GB No No
/projects-hydrology-archive0 5.0TB 80% 14.4TB
0Bytes Yes Yes
/climate-downscale-idf-ec 7.5TB 80% 5.1TB
2.4TB No No
/climate-downscale-idf 5.0TB 80% 6.1TB
0Bytes Yes Yes
/home 5.0TB 80% 11.8TB
0Bytes Yes Yes
/projects-hydrology-scratch0 7.0TB 80% 169.1GB
6.8TB No No
/projects-rci-scratch 10.0TB 80% 1.9TB
8.1TB No No
/projects-dataportal 1.0TB 80% 775.4GB
248.6GB No No
/modules 1.0TB 80% 36.1GB
987.9GB No No
/data4/climate/downscale/CMIP5 65.0TB 80% 56.4TB
8.6TB Yes No
Gluster is listing 'Used' space of over 307TB on /data4/climate, but
the volume capacity is only 146T.
This has happened after disabling quotas on the volume, re-enabling
quotas, and then setting quotas again. There was a lot of glusterfsd
CPU usage afterwards, and now 3 days later the quota's I set were all
missing except
/data4/projects|800.0GB|2.0TB|0Bytes
So I re-set the quotas and the output above is what I have.
Previous to disabling quota's this was the output:
# gluster volume quota storage list
Path Hard-limit Soft-limit Used
Available Soft-limit exceeded? Hard-limit exceeded?
---------------------------------------------------------------------------------------------------------------------------
/data4/climate 105.0TB 80% 151.6TB
0Bytes Yes Yes
/data4/forestry 50.0GB 80% 45.4GB
4.6GB Yes No
/data4/projects 800.0GB 80% 753.1GB
46.9GB Yes No
/data4/strays 85.0GB 80% 80.8GB
4.2GB Yes No
/data4/gis 2.2TB 80% 2.1TB
91.8GB Yes No
/data4/modperl 1.0TB 80% 948.1GB
75.9GB Yes No
/data4/dem 1.0GB 80% 0Bytes
1.0GB No No
/projects-CanSISE 10.0TB 80% 11.9TB
0Bytes Yes Yes
/projects-hydrology-archive0 5.0TB 80% 4.8TB
174.0GB Yes No
/climate-downscale-idf-ec 7.5TB 80% 5.0TB
2.5TB No No
/climate-downscale-idf 5.0TB 80% 3.8TB
1.2TB No No
/home 5.0TB 80% 4.7TB
283.8GB Yes No
/projects-hydrology-scratch0 7.0TB 80% 95.9GB
6.9TB No No
/projects-rci-scratch 10.0TB 80% 1.7TB
8.3TB No No
/projects-dataportal 1.0TB 80% 775.4GB
248.6GB No No
/modules 1.0TB 80% 14.6GB
1009.4GB No No
/data4/climate/downscale/CMIP5 65.0TB 80% 56.4TB
8.6TB Yes No
I was so focused on the /projects-CanSISE quota not being accurate
that I missed that the 'Used' space on /data4/climate is listed higher
then the total gluster volume capacity.
On Mon, Jan 25, 2016 at 10:52 AM, Steve Dainard <sdainard at spd1.com> wrote:
> Hi Manikandan
>
> I'm using 'du' not df in this case.
>
> On Thu, Jan 21, 2016 at 9:20 PM, Manikandan Selvaganesh
> <mselvaga at redhat.com> wrote:
>> Hi Steve,
>>
>> If you would like disk usage using df utility by taking quota limits into
>> consideration, then you are expected to run the following command.
>>
>> 'gluster volume set VOLNAME quota-deem-statfs on'
>>
>> with older versions where quota-deem-statfs is OFF by default. However with
>> the latest versions, quota-deem-statfs is by default ON. In this case, the total
>> disk space of the directory is taken as the quota hard limit set on the directory
>> of the volume and disk utility would display accordingly. This answers why there is
>> a mismatch in disk utility.
>>
>> Next, answering to quota mechanism and accuracy: There is something called timeouts
>> in quota. For performance reasons, quota caches the directory size on client. You can
>> set timeout indicating the maximum valid duration of directory sizes in cache,
>> from the time they are populated. By default the hard-timeout is 5s and soft timeout
>> is 60s. Setting a timeout of zero will do a force fetching of directory sizes from server
>> for every operation that modifies file data and will effectively disables directory size
>> caching on client side. If you do not have a timeout of 0(which we do not encourage due to
>> performance reasons), then till you reach soft-limit, soft timeout will be taken into
>> consideration, and only for every 60s operations will be synced and that could cause the
>> usage to exceed more than the hard-limit specified. If you would like quota to
>> strictly enforce then please run the following commands,
>>
>> 'gluster v quota VOLNAME hard-timeout 0s'
>> 'gluster v quota VOLNAME soft-timeout 0s'
>>
>> Appreciate your curiosity in exploring and if you would like to know more about quota
>> please refer[1]
>>
>> [1] http://gluster.readthedocs.org/en/release-3.7.0-1/Administrator%20Guide/Directory%20Quota/
>>
>> --
>> Thanks & Regards,
>> Manikandan Selvaganesh.
>>
>> ----- Original Message -----
>> From: "Steve Dainard" <sdainard at spd1.com>
>> To: "gluster-users at gluster.org List" <gluster-users at gluster.org>
>> Sent: Friday, January 22, 2016 1:40:07 AM
>> Subject: Re: [Gluster-users] Quota list not reflecting disk usage
>>
>> This is gluster 3.6.6.
>>
>> I've attempted to disable and re-enable quota's on the volume, but
>> when I re-apply the quotas on each directory the same 'Used' value is
>> present as before.
>>
>> Where is quotad getting its information from, and how can I clean
>> up/regenerate that info?
>>
>> On Thu, Jan 21, 2016 at 10:07 AM, Steve Dainard <sdainard at spd1.com> wrote:
>>> I have a distributed volume with quota's enabled:
>>>
>>> Volume Name: storage
>>> Type: Distribute
>>> Volume ID: 26d355cb-c486-481f-ac16-e25390e73775
>>> Status: Started
>>> Number of Bricks: 4
>>> Transport-type: tcp
>>> Bricks:
>>> Brick1: 10.0.231.50:/mnt/raid6-storage/storage
>>> Brick2: 10.0.231.51:/mnt/raid6-storage/storage
>>> Brick3: 10.0.231.52:/mnt/raid6-storage/storage
>>> Brick4: 10.0.231.53:/mnt/raid6-storage/storage
>>> Options Reconfigured:
>>> performance.cache-size: 1GB
>>> performance.readdir-ahead: on
>>> features.quota: on
>>> diagnostics.brick-log-level: WARNING
>>>
>>> Here is a partial list of quotas:
>>> # /usr/sbin/gluster volume quota storage list
>>> Path Hard-limit Soft-limit Used
>>> Available Soft-limit exceeded? Hard-limit exceeded?
>>> ---------------------------------------------------------------------------------------------------------------------------
>>> ...
>>> /projects-CanSISE 10.0TB 80% 11.9TB
>>> 0Bytes Yes Yes
>>> ...
>>>
>>> If I du on that location I do not get 11.9TB of space used (fuse mount point):
>>> [root at storage projects-CanSISE]# du -hs
>>> 9.5T .
>>>
>>> Can someone provide an explanation for how the quota mechanism tracks
>>> disk usage? How often does the quota mechanism check its accuracy? And
>>> how could it get so far off?
>>>
>>> Can I get gluster to rescan that location and update the quota usage?
>>>
>>> Thanks,
>>> Steve
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