topic Re: Regarding Physical Used Capacity in 9.14 in ONTAP Discussions

Regarding Physical Used Capacity in 9.14

vemus — Wed, 29 May 2024 09:23:44 GMT

Hi everyone,

We're currently investigating some significant differences in the reported physical used capacity between NetApp versions 9.13 and 9.14 and would appreciate your insights.

In version 9.13, when querying the physical used capacity using the CLI command

volume show -volume Apr* -fields size,available,total,used,physical-used, we received the following results:

vserver volume size available total used physical-used
-------- ----------- ------- --------- ------- ----- -------------
NetApp_2 Apr_ss_15gb 17.89GB 17.89GB 17.89GB 340KB 340KB
NetApp_2 Apr_ss_70gb 78.86GB 78.86GB 78.86GB 308KB 308KB

However, when querying the same information in version 9.14 with the same CLI command,

volume show -volume Apr* -fields size,available,total,used,physical-used,we observed a notable increase in the reported physical used capacity:

vserver volume size available total used physical-used
-------- ----------- ------- --------- ------- ----- -------------
NetApp_2 Apr_ss_15gb 17.89GB 17.89GB 17.89GB 468KB 17.99GB
NetApp_2 Apr_ss_70gb 78.86GB 78.86GB 78.86GB 456KB 79.30GB

We're trying to understand the reasons behind this discrepancy:

What constitutes physical used capacity in NetApp?
What changes were made between versions 9.13 and 9.14 that could account for the differences in physical used capacity?
What additional data is included in the calculation of physical used capacity in version 9.14 compared to version 9.13?
Where can we find documentation or resources detailing these changes to better understand how to interpret the physical used metric in our storage environment?

Any insights or guidance you can provide would be greatly appreciated.

Thank You.!

Re: Regarding Physical Used Capacity in 9.14

sanmanjax — Wed, 29 May 2024 15:04:37 GMT

You will definitely want to check the API references for any changes that may have been made between the versions. My API usage with NetApp is still fairly limited, but I have used other storage vendors' APIs extensively and found many times that units would change or definitions of fields would change, sometimes within minor updates but almost always in major updates.

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Re: Regarding Physical Used Capacity in 9.14

chenguanghui — Wed, 09 Apr 2025 07:38:27 GMT

hello:

1.The physical used refers to the capacity that has been used in the physical blocks of a volume or local layer.

2.The following two articles respectively describe the functions between various versions on September 13th and September 14th. I hope they can be of help to you.

https://docs.netapp.com/us-en/ontap/release-notes/whats-new-9141.html

https://docs.netapp.com/zh-cn/ontap/release-notes/whats-new-9131.html

Best regards.