Weird mass delete of files in a volume with ONTAP ASYNC-Delete

Paul Letta via toasters <[email protected]> Tue, 15 Jul 2025 20:57:00 +0000
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From: Paul Letta <[email protected]>
To: toasters <[email protected]>
Subject: Weird mass delete of files in a volume with ONTAP ASYNC-Delete
Thread-Topic: Weird mass delete of files in a volume with ONTAP ASYNC-Delete
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Date: Tue, 15 Jul 2025 20:57:00 +0000
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Hi Toasters.

I'm running 9.14.1P13.

I used the  ONTAP ASYNC-Delete feature from the GUI (storage - Volumes - cl=
ick on a volume - Click on File system - click on Explorer) to delete a few=
 top level folders in a volume.   That worked fine.  I saw the background j=
ob running and they finished fine.

I needed to delete much more.  So I clicked on the trash can for one of the=
 folders, clicked ok to start the delete.
Then I clicked elsewhere in the GUI and clicked back to File-System, Explor=
er - and clicked on the trash can for a different folder.
I did this maybe 6 or 7 times.    When I check the jobs in ONTAP, I saw the=
m all running.

But then as I waited, I saw a lot more space being used by snapshots (via t=
he df command) than the 6 or 7 folders I wanted to delete.
At this point, only 1 ASYNC-Delete job was still running, so I canceled it.

When I look at the live file system.. I see almost all folders (not just th=
e 6 or 7 I clicked) have massive files deleted.   Luckily for me, this volu=
me was just a filesystem that barely changes.. so I could snapshot restore =
from a few hours before, and all was well.

Now I'm scared to death of that file-explore page in the ONTAP GUI.    I am=
 the only administrator, so no one else could have been logged on to ONTAP.=
   The pattern of deleted files makes a delete coming from a CIFS client ve=
ry unlikely.  There is no NFS export to this volume.

Maybe the file explorer delete button was not intended for multiple, simult=
aneous runs?
I don't know..   I know I will avoid page like a plague forever now.   Any =
thoughts ?

Thanks!

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<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Hi Toasters.<o:p></=
o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I&#8217;m running 9=
.14.1P13.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I used the &nbsp;ON=
TAP ASYNC-Delete feature from the GUI (storage &#8211; Volumes &#8211; clic=
k on a volume &#8211; Click on File system &#8211; click on Explorer) to de=
lete a few top level folders in a volume.&nbsp;&nbsp; That worked fine.&nbs=
p; I
 saw the background job running and they finished fine.<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I needed to delete =
much more.&nbsp; So I clicked on the trash can for one of the folders, clic=
ked ok to start the delete.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Then I clicked else=
where in the GUI and clicked back to File-System, Explorer &#8211; and clic=
ked on the trash can for a different folder.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I did this maybe 6 =
or 7 times.&nbsp;&nbsp;&nbsp; When I check the jobs in ONTAP, I saw them al=
l running.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">But then as I waite=
d, I saw a lot more space being used by snapshots (via the df command) than=
 the 6 or 7 folders I wanted to delete.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">At this point, only=
 1 ASYNC-Delete job was still running, so I canceled it.<o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">When I look at the =
live file system.. I see almost all folders (not just the 6 or 7 I clicked)=
 have massive files deleted.&nbsp;&nbsp; Luckily for me, this volume was ju=
st a filesystem that barely changes.. so I could
 snapshot restore from a few hours before, and all was well.<o:p></o:p></sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Now I&#8217;m scare=
d to death of that file-explore page in the ONTAP GUI.&nbsp;&nbsp;&nbsp; I =
am the only administrator, so no one else could have been logged on to ONTA=
P.&nbsp;&nbsp; The pattern of deleted files makes a delete coming from
 a CIFS client very unlikely.&nbsp; There is no NFS export to this volume.<=
o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Maybe the file expl=
orer delete button was not intended for multiple, simultaneous runs?&nbsp;
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">I don&#8217;t know.=
.&nbsp;&nbsp; I know I will avoid page like a plague forever now.&nbsp;&nbs=
p; Any thoughts ?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt"><o:p>&nbsp;</o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt">Thanks!<o:p></o:p><=
/span></p>
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