[Gluster-users] Disk use with GlusterFS

Fri Mar 6 11:07:10 UTC 2020

On March 6, 2020 10:19:55 AM GMT+02:00, David Cunningham <dcunningham at voisonics.com> wrote:
>Hi Hu.
>
>Just to clarify, what should we be looking for with "df -i"?
>
>
>On Fri, 6 Mar 2020 at 18:51, Hu Bert <revirii at googlemail.com> wrote:
>
>> Hi,
>>
>> just a guess and easy to test/try: inodes? df -i?
>>
>> regards,
>> Hubert
>>
>> Am Fr., 6. März 2020 um 04:42 Uhr schrieb David Cunningham
>> <dcunningham at voisonics.com>:
>> >
>> > Hi Aravinda,
>> >
>> > That's what was reporting 54% used, at the same time that GlusterFS
>was
>> giving no space left on device errors. It's a bit worrying that
>they're not
>> reporting the same thing.
>> >
>> > Thank you.
>> >
>> >
>> > On Fri, 6 Mar 2020 at 16:33, Aravinda VK <aravinda at kadalu.io>
>wrote:
>> >>
>> >> Hi David,
>> >>
>> >> What is it reporting for brick’s `df` output?
>> >>
>> >> ```
>> >> df /nodirectwritedata/gluster/gvol0
>> >> ```
>> >>
>> >> —
>> >> regards
>> >> Aravinda Vishwanathapura
>> >> https://kadalu.io
>> >>
>> >> On 06-Mar-2020, at 2:52 AM, David Cunningham
><dcunningham at voisonics.com>
>> wrote:
>> >>
>> >> Hello,
>> >>
>> >> A major concern we have is that "df" was reporting only 54% used
>and
>> yet GlusterFS was giving "No space left on device" errors. We rely on
>"df"
>> to report the correct result to monitor the system and ensure
>stability.
>> Does anyone know what might have been going on here?
>> >>
>> >> Thanks in advance.
>> >>
>> >>
>> >> On Thu, 5 Mar 2020 at 21:35, David Cunningham <
>> dcunningham at voisonics.com> wrote:
>> >>>
>> >>> Hi Aravinda,
>> >>>
>> >>> Thanks for the reply. This test server is indeed the master
>server for
>> geo-replication to a slave.
>> >>>
>> >>> I'm really surprised that geo-replication simply keeps writing
>logs
>> until all space is consumed, without cleaning them up itself. I
>didn't see
>> any warning about it in the geo-replication install documentation
>which is
>> unfortunate. We'll come up with a solution to delete log files older
>than
>> the LAST_SYNCED time in the geo-replication status. Is anyone aware
>of any
>> other potential gotchas like this?
>> >>>
>> >>> Does anyone have an idea why in my previous note some space in
>the 2GB
>> GlusterFS partition apparently went missing? We had 0.47GB of data,
>1GB
>> reported used by .glusterfs, which even if they were separate files
>would
>> only add up to 1.47GB used, meaning 0.53GB should have been left in
>the
>> partition. If less space is actually being used because of the hard
>links
>> then it's even harder to understand where the other 1.53GB went. So
>why
>> would GlusterFS report "No space left on device"?
>> >>>
>> >>> Thanks again for any assistance.
>> >>>
>> >>>
>> >>> On Thu, 5 Mar 2020 at 17:31, Aravinda VK <aravinda at kadalu.io>
>wrote:
>> >>>>
>> >>>> Hi David,
>> >>>>
>> >>>> Is this Volume is uses Geo-replication? Geo-replication feature
>> enables Changelog to identify the latest changes happening in the
>GlusterFS
>> volume.
>> >>>>
>> >>>> Content of .glusterfs directory also includes hardlinks to the
>actual
>> data, so the size shown in .glusterfs is including data. Please refer
>the
>> comment by Xavi
>>
>https://github.com/gluster/glusterfs/issues/833#issuecomment-594436009
>> >>>>
>> >>>> If Changelogs files are causing issue, you can use archival tool
>to
>> remove processed changelogs.
>> >>>> https://github.com/aravindavk/archive_gluster_changelogs
>> >>>>
>> >>>> —
>> >>>> regards
>> >>>> Aravinda Vishwanathapura
>> >>>> https://kadalu.io
>> >>>>
>> >>>>
>> >>>> On 05-Mar-2020, at 9:02 AM, David Cunningham <
>> dcunningham at voisonics.com> wrote:
>> >>>>
>> >>>> Hello,
>> >>>>
>> >>>> We are looking for some advice on disk use. This is on a single
>node
>> GlusterFS test server.
>> >>>>
>> >>>> There's a 2GB partition for GlusterFS. Of that, 470MB is used
>for
>> actual data, and 1GB is used by the .glusterfs directory. The
>.glusterfs
>> directory is mostly used by the two-character directories and the
>> "changelogs" directory. Why is so much used by .glusterfs, and can we
>> reduce that overhead?
>> >>>>
>> >>>> We also have a problem with this test system where GlusterFS is
>> giving "No space left on device" errors. That's despite "df"
>reporting only
>> 54% used, and even if we add the 470MB to 1GB used above, that still
>comes
>> out to less than the 2GB available, so there should be some spare.
>> >>>>
>> >>>> Would anyone be able to advise on these please? Thank you in
>advance.
>> >>>>
>> >>>> The GlusterFS version is 5.11 and here is the volume
>information:
>> >>>>
>> >>>> Volume Name: gvol0
>> >>>> Type: Distribute
>> >>>> Volume ID: 33ed309b-0e63-4f9a-8132-ab1b0fdcbc36
>> >>>> Status: Started
>> >>>> Snapshot Count: 0
>> >>>> Number of Bricks: 1
>> >>>> Transport-type: tcp
>> >>>> Bricks:
>> >>>> Brick1: myhost:/nodirectwritedata/gluster/gvol0
>> >>>> Options Reconfigured:
>> >>>> transport.address-family: inet
>> >>>> nfs.disable: on
>> >>>> geo-replication.indexing: on
>> >>>> geo-replication.ignore-pid-check: on
>> >>>> changelog.changelog: on
>> >>>>
>> >>>> --
>> >>>> David Cunningham, Voisonics Limited
>> >>>> http://voisonics.com/
>> >>>> USA: +1 213 221 1092
>> >>>> New Zealand: +64 (0)28 2558 3782
>> >>>> ________
>> >>>>
>> >>>>
>> >>>>
>> >>>> Community Meeting Calendar:
>> >>>>
>> >>>> Schedule -
>> >>>> Every Tuesday at 14:30 IST / 09:00 UTC
>> >>>> Bridge: https://bluejeans.com/441850968
>> >>>>
>> >>>> Gluster-users mailing list
>> >>>> Gluster-users at gluster.org
>> >>>> https://lists.gluster.org/mailman/listinfo/gluster-users
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>
>> >>>
>> >>> --
>> >>> David Cunningham, Voisonics Limited
>> >>> http://voisonics.com/
>> >>> USA: +1 213 221 1092
>> >>> New Zealand: +64 (0)28 2558 3782
>> >>
>> >>
>> >>
>> >> --
>> >> David Cunningham, Voisonics Limited
>> >> http://voisonics.com/
>> >> USA: +1 213 221 1092
>> >> New Zealand: +64 (0)28 2558 3782
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >
>> >
>> > --
>> > David Cunningham, Voisonics Limited
>> > http://voisonics.com/
>> > USA: +1 213 221 1092
>> > New Zealand: +64 (0)28 2558 3782
>> > ________
>> >
>> >
>> >
>> > Community Meeting Calendar:
>> >
>> > Schedule -
>> > Every Tuesday at 14:30 IST / 09:00 UTC
>> > Bridge: https://bluejeans.com/441850968
>> >
>> > Gluster-users mailing list
>> > Gluster-users at gluster.org
>> > https://lists.gluster.org/mailman/listinfo/gluster-users
>>

Ermm

Inodes.
If you run out of inodes  you got the error that you have no space, although you do have some space left, but no location to write inode metadata.

Pure valid question.

Best Regads,
Strahil Nikolov