Available free space on the FSx volume


Dear Team, We have Amazon FSx service, utilizing this as a datastore on VMC in AWS. The datastore is currently reflecting the free space available on the SSD tier. But we use this datastore for archiving purposes and hence all the data is tiered to the capacity storage. Hence, rather than the free space on the SSD tier (or file system in other words), we would like to know the free space avaialable on the capacity tier (or volume in other words). I know we can get this information from the running the command "volume show-space" on the SVM but how do we get this information in a email every few hours so that we don't have to login to the SVM every now and then to check the available capacity. Thanks in advance for your help. Regards, Karthik

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The following architecture shows how to dynamically increase space. It also shows how to use SNS to send an Email. https://docs.aws.amazon.com/fsx/latest/WindowsGuide/managing-storage-capacity.html#automate-storage-capacity-increase

In short, this architecture sets a cloud watch alarm on low space. Then you can set that alarm to notify an SNS Topic, which can subscribe too via email.

Update: Since you are using Amazon FSx for NetApp ONTAP the metrics will be slightly different and the details of those can be found. https://docs.aws.amazon.com/fsx/latest/ONTAPGuide/alarm-low-primary-storage.html

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  • Hi Robert, Thanks for your reply. We are using Amazon FSx for NetApp ONTAP and not Amazon FSx for Windows File Server and hence I belive this doesn't apply to us, am I correct in my assumption? Also, we need the email alert for the storage capacity of the capacity tier and not for the performance tier (SSD). In the cloud watch metric, I couldn't find a single metric which provides us with the informaton about the capacity tier volume statistics. Regards, Karthik

  • Updated the original answer with the metrics you have to use for the Alarms so you can have that alarm send a SNS message.


There is no logical limit to the amount of data you can store in capacity pool storage for your Amazon FSx for NetApp ONTAP file system. Instead, the physical limit is determined by the size of your SSD tier, because all file metadata is always stored on the SSD tier (see How SSD is used for more information). Meanwhile, volumes are logical data containers--your volume storage capacity sets the limit of logical data you can store in your volume. For example, if you have a 1 GiB volume, with 200 MiB of data stored on the SSD tier and 500 MiB on the capacity pool tier, the used capacity of the volume is 700 MiB / 1024 MiB. The FSx for ONTAP docs has a diagram that illustrates this (see the storage tiers).

You can use FSx for ONTAP CloudWatch metrics in order to monitor the utilization of your file system and its volumes.

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