2009-08-03 11:41 AM
Anyone now of report o see if a volume is over allocated.
I trired the "volume Space Guarantees report" but that does not show me the volume is over allocated.
Basically for a test I have a 20 gig (non space reserved volume) and and 50 gig lun (non spaced reserved) in that volume.
I am looking for a DFM report to show me I have over allocated the volume.
My whole envrionment is thin provisioned and as I grow, shrink volumes, and remove lunss etcc.... I want to make sure I do have a handle on whats allocated. Over allocation of an aggreate is an easy report, but I need it on the volume level, if a Lun fills up and there is space in the volume, the lun stays online, but you just can't write to it. In this case the system admin needs to deal with why they let the lun fill up.
However if a lun can't accept any more data because the voluem is full, the lun goes off line. A lun going offline can be catrostrophic, and that is my issue for having a lun go offline.
2009-08-03 10:23 PM
We dont have a volume overcommit report becasue of lun thin provisioning.
Currently we don have it only @ qtree level and aggr overcommit @ volume level.
May be we can create a script plugin to create a report of that sort.
2009-08-04 04:02 AM
As Adai said we don't have volume-overcommitment report in DFM as of now, to address the LUN offline issue we can use volume autogrow of ONTAP. Set the autosize of the volume to a limit; e.g. set it to the total size of all the non-space reserved LUN. This way we can avoid that LUN offline issue provided aggregate has space to grow the volumes.
For autosize we have report on volume level:-
Object ID Volume Filer/vFiler Autosize State Maximum Size Increment Size
2009-08-04 06:11 AM
Isn't there a max size for volume auto grow? if so this could be an issue?
This scenario could work, but I want to limit user error, so a report would really be helpful.
2009-08-04 06:26 AM
As such there is no limit for max-size; we can set it to aggr size also, rather more than aggr size also; but it will be accounted in the aggr overcommitment calculations in DFM.
Actually the requirement which you described in reply to Adai's response; we have a volume Vs LUN used space graphical report in Provisioning Manager in DFM 3.8. Let me find out if we can get a CLI based report for the graphical re-presentation.
We will get back to you on that.
2009-08-04 11:28 AM
All these data is availble in the dfm db.
We will be creating a script plugin and a custom report to create one more column and populate the new column, which would be
the sum of all lun size contained in the volume.
I will give you a script plugin by end of my day tomorrow.