Optimize partial Flat random access with blocking I/O - #9415

Draft

joseph-isaacs wants to merge 19 commits into

ji/partial-flat-random-access-blocking

Commits on Aug 14, 2026

Add batched positional reads
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f220523
Stream batched positional read results
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d6d69d4
Monitor positional read batch sizes
joseph-isaacs
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4d5f554
Keep positional read concurrency saturated
joseph-isaacs
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5e0f2a4
Optimize batched object store reads
joseph-isaacs
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1444be5
Tune local read coalescing
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c36bdb7
Add optional io_uring local reads
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1ecd351
Use direct reads for local scan files
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47aa47e
Add partial segment range requests
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1d6fc4c
Reuse blocking workers across positional read batches
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ef156f4
Submit partial segment ranges as bounded batches
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59bb8be
Forward grouped reads through the segment cache
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4435efb
Keep partial range submissions batched
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e3bfe1b
Read Flat arrays from partial segment ranges
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23eba74
Issue ALPRD partial reads in one round
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be88673
Keep Flat partial reads to one I/O round
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29978e9
Canonicalize ALPRD patch indices once
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cb9012a
Fix positional read driver test
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58a6a85
Optimize partial Flat random access
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41615a2