Snapvault destination volume occupying more space than the Source volume

[NAYABRASOOL]

Hi All,

It is strange i have snapvaulted my volume which is 2.27TB under which i have 14 Qtrees , I don understand once after i have started the initial transfer it failed in the middle showing error NO SPACE LEFT ON THE DEVICE but i have created a volume of 2.40TB in the destination filer dont know what happened once the initial transfer finished the SECONDARY VOLUME become around (As it failed several number of time in the middle i have to keep on adding space )  3.76TB can anybody tell why this has happened is this a bug else due to version difference ??

Ontap Versions

Primary Filer Version :-     8.1.1        7-Mode

Secondary Filer Version :- 8.0.1RC3 7-Mode.

Thanks,

Nayab

[radek_kubka]

Hi Nayab,

Isn't your source volume deduped by any chance?

SnapVault as logical replication doesn't preserve deduplication - after the baseline is transferred you can run dedupe at the destination  & *then* you should have roughly the same space occupied at both ends.

Regards,
Radek

[NAYABRASOOL]

Hi Radek,

I have checked the source no deduplication was configured on any volume as i tried the command

zsswnetp5> sis status

No status entry found.

Now what i have to do

Thanks,

Nayab

[radek_kubka]

Single file cloning? Compression?

What's the output of df -S?

[NAYABRASOOL]

netp5> df -S

Filesystem                used       total-saved    %total-saved    deduplicated    %deduplicated    compressed    %compressed

/vol/eccp1/      2215643520                 0              0%               0               0%             0             0%

/vol/eccp1_archlog/  130340572                 0              0%               0               0%             0             0%

This is what i am able to see for all of my volumes

Thanks,

Nayab

[NAYABRASOOL]

Above are two volumes what i have snapvaulted today

[NAYABRASOOL]

Can anybody help me ???

[ASHWANI8HIGHS]

Hi Nayab,

Can you please share the output of  vol status and vol options for both the source and snapvault vol

[NAYABRASOOL]

Hi Ashwani,

Please find the output of the above commands and also please note SNAPVAULT is not active due to Space constrains i have unscheduled everything 

SOURCE

vol status eccp1

         Volume State           Status            Options

       ssweccp1 online          raid_dp, flex     nosnap=on, create_ucode=on, convert_ucode=on,

                                32-bit            fractional_reserve=0,

                                                  snapshot_clone_dependency=on

                         Volume UUID: 0b68168c-7ef2-11e0-a4d2-00a0980f2390

                Containing aggregate: 'fcaggr0'

vol options eccp1

nosnap=on, nosnapdir=off, minra=off, no_atime_update=off, nvfail=off,

ignore_inconsistent=off, snapmirrored=off, create_ucode=on,

convert_ucode=on, maxdirsize=167690, schedsnapname=ordinal,

fs_size_fixed=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=on, dlog_hole_reserve=off,

nbu_archival_snap=off

DESTINATION

bsswvltp1> vol status sv_eccp1

         Volume State           Status            Options

    sv_ssweccp1 online          raid_dp, flex

                         Volume UUID: 05e89bf6-e51f-11e2-9d91-00a09827b8c2

                Containing aggregate: 'ataggr0'

vol options sv_eccp1

nosnap=off, nosnapdir=off, minra=off, no_atime_update=off, nvfail=off,

ignore_inconsistent=off, snapmirrored=off, create_ucode=off,

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=100, extent=off, try_first=volume_grow,

read_realloc=off, snapshot_clone_dependency=off, nbu_archival_snap=off

Thanks,

Nayab

[ASHWANI8HIGHS · Accepted solution]

Hi Nayab  ,

See the snapvault volume has fractional reserve set to 100 . No need of this reserve  remove it and then start vaulting

your primary qtree's to this destination  .Hope this will resolve your issue .

thanks

Ashwin

[NAYABRASOOL]

You mean you are speaking about the fractional reserve on the destination volume right ???  Now if i disable fractional reserve will i be able to reclaim free space on to the volume ??

[NAYABRASOOL]

I was able to reclaim the space Thanks a lot