ontap keeps trying autogrow while limit is reached

[GVM666GVM]

Hi all,

I recently noticed that I get alot of messages about autogrow for some volumes.

I am aware that the limit is reached for the autogrowth.

However there is 30% free space in the volume and still I get a mesage about the autgrow failing.

Why does it keep trying to grow while there is enough space?

And it's a bit annoying  that this message repeats over and over again.

Mon Jan 14 11:30:53 CET [wafl.vol.autoSize.fail:info]: Unable to grow volume 'vol19' to recover space: Volume cannot be grown beyond maximum growth limit

filer1> vol status -v vol19

         Volume State           Status            Options

vol19 online          raid_dp, flex     nosnap=on, nosnapdir=on,

                                sis               minra=off, no_atime_update=off,

                                                  nvfail=off,

                                                  ignore_inconsistent=off,

                                                  snapmirrored=off,

                                                  create_ucode=on,

                                                  convert_ucode=off,

                                                  maxdirsize=41861,

                                                  schedsnapname=ordinal,

                                                  fs_size_fixed=off,

                                                  compression=off,

                                                  guarantee=volume, svo_enable=off,

                                                  svo_checksum=off,

                                                  svo_allow_rman=off,

                                                  svo_reject_errors=off,

                                                  no_i2p=off, fractional_reserve=0,

                                                  extent=off,

                                                  try_first=volume_grow,

                                                  read_realloc=off,

                                                  snapshot_clone_dependency=off,

                                                  nbu_archival_snap=off

                         Volume UUID: xxxxxxxxxxxxxxxxxxx

                Containing aggregate: 'aggr1'

                Plex /aggr1/plex0: online, normal, active

                    RAID group /aggr1/plex0/rg0: normal

                    RAID group /aggr1/plex0/rg1: normal

        Snapshot autodelete settings for vol19:

                                        state=on

                                        commitment=try

                                        trigger=volume

                                        target_free_space=10%

                                        delete_order=oldest_first

                                        defer_delete=user_created

                                        prefix=(not specified)

                                        destroy_list=none

        Volume autosize settings:

                                        state=on

                                        maximum-size=1932734880 KB

                                        increment-size=80530620 KB

[mladen_zecevic · Accepted solution]

What is the current size of the volume?

Can you post a "df -k /vol/vol19" output?

I had a similar case when the volume size was manually increased so it was more than the maximum defined in autosize. This was causing a flood of "unable to grow..." messages in syslog.

I even opened a case because I was convinced that if there is more than 20% free space autosize should not do anything. It turned out that this is by design i.e. if the volume is already over the maximum, the warnings will be generated regardless of volume space usage. In future ONTAP versions the warnings should have a lower frequency, but the only solution is to set autosize maximum to be more than current volume size.

Regards,

Mladen

[GVM666GVM]

The size is indeed bigger than the maximum defined in autosize.

So this explains the messages.

However it is a strange brain twist to make it give these messages even if it hasn't to do any expansion of the volume.

On the other hand, it alerts you of the situation that in case ONTAP wants to autogrow, it will not work and your volume might run out of space.

Thanks for your reponse on this!