DatastoreDisabledCacheManager

class lsst.daf.butler.DatastoreDisabledCacheManager(config: Union[str, DatastoreCacheManagerConfig], universe: DimensionUniverse)

Bases: lsst.daf.butler.AbstractDatastoreCacheManager

A variant of the datastore cache where no cache is enabled.

Parameters:

config : str or DatastoreCacheManagerConfig

Configuration to control caching.

universe : DimensionUniverse

Set of all known dimensions, used to expand and validate any used in lookup keys.

Attributes Summary

cache_size	Size of the cache in bytes.
file_count	Return number of cached files tracked by registry.

Methods Summary

find_in_cache(ref, extension)	Look for a dataset in the cache and return its location.
move_to_cache(uri, ref)	Move dataset to cache but always refuse and returns None.
remove_from_cache(ref, …)	Remove datasets from cache.
should_be_cached(entity, DatasetType, …)	Indicate whether the entity should be added to the cache.

Attributes Documentation

cache_size

Size of the cache in bytes.

file_count

Return number of cached files tracked by registry.

Methods Documentation

find_in_cache(ref: lsst.daf.butler.core.datasets.ref.DatasetRef, extension: str) → Iterator[Optional[lsst.resources._resourcePath.ResourcePath]]

Look for a dataset in the cache and return its location.

Never finds a file.

move_to_cache(uri: lsst.resources._resourcePath.ResourcePath, ref: lsst.daf.butler.core.datasets.ref.DatasetRef) → Optional[lsst.resources._resourcePath.ResourcePath]

Move dataset to cache but always refuse and returns None.

remove_from_cache(ref: Union[lsst.daf.butler.core.datasets.ref.DatasetRef, Iterable[lsst.daf.butler.core.datasets.ref.DatasetRef]]) → None

Remove datasets from cache.

Always does nothing.

should_be_cached(entity: Union[DatasetRef, DatasetType, StorageClass]) → bool

Indicate whether the entity should be added to the cache.

Always returns False.