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File object cache for DirectoryStore #381

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jakirkham opened this issue Jan 4, 2019 · 0 comments
Open

File object cache for DirectoryStore #381

jakirkham opened this issue Jan 4, 2019 · 0 comments

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@jakirkham
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It would be nice to have a file object cache for DirectoryStore (likely using LRU). The benefit here would be twofold. First we could reuse the same file object for multiple reads as opposed to tossing it after each one. This benefit becomes more notable when considering memory-mapping. ( #265 ) ( #377 ) Second we could constrain the number of file descriptors around at any one time by fixing the cache size. This latter point has been an issue historically for some workflows. Though IDK how much it occurs with Zarr specifically.
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@jakirkham