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Answered
Any Info On The Lifecycle Of Datasets Downloaded To $Home/.Clearml/Cache/Storage_Manager/Datasets Via Get_Local_Copy I Have A Task Running And I Was Watching The Above Path And Datasets Were Being Downloaded And Then They Are All Removed And For A Partic

Any info on the lifecycle of datasets downloaded to $HOME/.clearml/cache/storage_manager/datasets via get_local_copy

I have a task running and I was watching the above path and datasets were being downloaded and then they are all removed and for a particular task it even happens before my task is done and I get file not found error. Are the local copies cleared during a task?

  
  
Posted 2 years ago
Votes Newest

Answers 12


Only one. Will replicate it in detail and see what’s actually up

  
  
Posted 2 years ago

And I think the default is 100 entries, so it should not get cleaned.

and then they are all removed and for a particular task it even happens before my task is done

Is this reproducible ? Who is cleaning it and when?

  
  
Posted 2 years ago

Ok that wasn’t it 😞

  
  
Posted 2 years ago

AgitatedDove14 - worked with mutable copy! So was definitely related to the symlinks in some form

  
  
Posted 2 years ago

So was definitely related to the symlinks in some form

could it be it actually deleted the cache? How many agents are running on the same machine ?

  
  
Posted 2 years ago

Could that be it ?

  
  
Posted 2 years ago

Fix - use shutil.copy instead of shutil.copy2 - verifying now.

  
  
Posted 2 years ago

Hmm, Notice that it does store sym links to parent data versions (to save on multiple copies of the same file). If you call get_mutable_local_copy() you will get a standalone copy

  
  
Posted 2 years ago

Will try it out. A weird one this.

  
  
Posted 2 years ago

Also it’s not happening when running locally, but only in remote on a agent

  
  
Posted 2 years ago

Number of entries in the dataset cache can be controlled via cleaml.conf : sdk.storage.cache.default_cache_manager_size

  
  
Posted 2 years ago

AgitatedDove14 - this was an interesting one. I think I have found the issue, but verifying the fix as of now.

One of the devs was using shutil.copy2 to copy parts of dataset to a temporary directory in a with block - something like:

with TemporaryDirectory(dir=temp_dir) as certificates_directory: for file in test_paths: shutil.copy2(f"{dataset_local}/{file}", f"{certificates_directory}/file")
My suspicion is since copy2 copies with full data and symlinks, it’s messing with the way clearml-data sets up datasets with symlinks to parents etc and when the temp directories are cleaned due to the with blocks the local copies are cleared too

  
  
Posted 2 years ago