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databricks: check if the mountpoint already mounted

How to check if the mount point is already mounted before mount in databricks python ??

dbutils.fs.mount

Thanks

like image 538
mytabi Avatar asked Oct 23 '19 02:10

mytabi


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How do I check my mount points in Databricks?

You can simply use the Databricks filesystem commands to navigate through the mount points available in your cluster. This will give you all the mount points and also display the corresponding ADLS source file path.

How do you refresh a mount point in Databricks?

refreshMounts command (dbutils. Forces all machines in the cluster to refresh their mount cache, ensuring they receive the most recent information. To display help for this command, run dbutils. fs. help("refreshMounts") .

How do I use a mount point in Databricks?

You can mount an S3 bucket through What is the Databricks File System (DBFS)?. The mount is a pointer to an S3 location, so the data is never synced locally. After a mount point is created through a cluster, users of that cluster can immediately access the mount point.


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3 Answers

Try this:

def sub_unmount(str_path):
    if any(mount.mountPoint == str_path for mount in dbutils.fs.mounts()):
        dbutils.fs.unmount(str_path)

sub_unmount('/mnt/flightdata')

Result:

/mnt/flightdata has been unmounted.

Verify with this:

dbutils.fs.ls("/mnt/")

Inspired by this: https://forums.databricks.com/questions/8103/graceful-dbutils-mountunmount.html

like image 148
howchoy Avatar answered Oct 19 '22 17:10

howchoy


Open a new cell in Databricks notebook and write the below command:

%fs mounts

As an output, you will get mountpoint, path, and the encryption type.

like image 5
venus Avatar answered Oct 19 '22 16:10

venus


How to check if the mount point is already mounted before mount in databricks python ??

You can use the below cmdlet to check if the mount point is already mounted before mount in databricks python.

%fs ls dbfs:/mnt

Example: I have two mount points attached to the DBFS and the results as shown as follows.

enter image description here

OR

You can use the below cmdlet to check if the mount point is already mounted before mount in databricks python.

dbutils.fs.ls('/mnt/')

enter image description here

Hope this helps.

like image 2
CHEEKATLAPRADEEP-MSFT Avatar answered Oct 19 '22 17:10

CHEEKATLAPRADEEP-MSFT