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Move chunking utilities from HDF5Array to DelayedArray?

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
25/100
Issue type
Refactor
Clarity
Needs clarification
Activity status
Stale
Tech stack
r
Domain
data

Research direction

Start by locating setHDF5DumpChunkLength, setHDF5DumpChunkShape, and the related automatic chunk-dimension helpers in HDF5Array, then compare what DelayedArray exposes for reuse. Review the proposed needs of TileDBArray, DelayedRandomArray, and SparseArray, with issue #89 as context; done means agreeing on a reusable chunking design that supports these backends.

Written by the indexing model from the issue text.

Description

Here I'm talking about setHDF5DumpChunkLength, setHDF5DumpChunkShape, and whatever extra functions are used to auto-choose "sensible" chunk dimensions for the HDF5 arrays. Can these be moved to DelayedArray for re-use by other backends? I would then be able to use this in TileDBArray and DelayedRandomArray, and I imagine there would also be some kind of re-use for SparseArray. In addition to making backend development easier, it could also improve efficiency by ensuring that interactions between different backends involve the same chunk dimensions. An obvious example is #89, where we could encourage consistency in chunks between the RandomNormMatrix and HDF5Matrix for optimal writing speed.

Dominant language
R
Stars
29
Forks
12
PR merge metrics
No merged PRs in 30d

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