ONTAP Hardware

Deduplication bug?

gravasio

Hello, 

today I think we hit hard this bug, filling a 3.7TB aggregate with 1.2TB of A-SIS

 

   Total space    WAFL reserve    Snap reserve    Usable space
BSR NVLOG           A-SIS          Smtape
         3673GB           367GB             0KB          3306GB
   0KB          1122GB             0KB

Space allocated to volumes in the aggregate

Volume                          Allocated            Used       Guarantee
volroot                             163GB          4167MB          volume
linux_virtual_machines              905GB           900GB            none
test_iscsi_vol                     4487MB          4308MB            none
microsoft_virtual_machines           106GB           105GB            none
iscsi_linux_vms_vol                 138GB           137GB            none
mail_fast                           707GB           700GB            none

Aggregate                       Allocated            Used           Avail
Total space                        2027GB          1853GB           156GB
Snap reserve                          0KB             0KB             0KB
WAFL reserve                        367GB            39GB           327GB

 

Now we cleaned up a little bit and now we have 150GB free and the services running.

I would like to resolve the issue, and I'm asking myself if it's wise to:

 

- Disable the SIS avoiding a tonight disk filling:

sis off /vol/<volname>

for every volume that has the deduplication on

 

- When convenient  (maybe in the weekend) run

sis start -s /vol/<volname>

 

- When convenient ask my specialist to upgrade the DataONTAP to a fixed version

 

Am I right?

 

PS: I'm also asking myself if there is a way to see how many stale fingerprints I have.

the percentages shown in sis status -l are not too high and it seems to me that they are wrong!

 

Thanks

Giuseppe

1 REPLY 1

Sahana

Hi,

 

Please refer bug 657692 and KB https://kb.netapp.com/support/s/article/stale-metadata-not-automatically-removed-as-part-of-the-sis-start-operation-on-the-volume-when-running-data-on...

If this post resolved your issue, help others by selecting ACCEPT AS SOLUTION or adding a KUDO.
Announcements
Register for Insight 2021 Digital

INSIGHT 2021 Digital: Meet the Specialists 2

On October 20-22, gear up for a fully digital, totally immersive virtual experience with a downright legendary lineup of world-renowned specialists. Tune in for visionary conversations, solution deep dives, technical sessions and more.

NetApp on Discord Image

We're on Discord, are you?

Live Chat, Watch Parties, and More!

Explore Banner

Meet Explore, NetApp’s digital sales platform

Engage digitally throughout the sales process, from product discovery to configuration, and handle all your post-purchase needs.

NetApp Insights to Action
I2A Banner
Public