> For the complete documentation index, see [llms.txt](https://lwang010.gitbook.io/longw/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lwang010.gitbook.io/longw/mlops/chap-3.-hardware-maintain/storage-data-center/case-debug-w-r-speed-in-nfs-file-system.md).

# \[Case] Debug w/r speed in nfs file system

* identify all the process related
* identify the file system and its version
* measure the r/w speed at different process
* if the outer driver involved, unmount and mount it again

Notes:

* You might find below command helpful:\`dd if=path/to/input\_file of=/path/to/output\_file bs=block\_size count=number\_of\_blocks\`
* If multiple small files are involved to test the speed, please test on a large file as well; because there are additional link creation processed related to multiple small files.