jp0317 opened a new pull request, #36180: URL: https://github.com/apache/arrow/pull/36180
### Rationale for this change The current [ReadRangeCache](https://github.com/apache/arrow/blob/main/cpp/src/arrow/io/caching.h#L100) support a laze mode where each range is read upon an [explicit request](https://github.com/apache/arrow/blob/main/cpp/src/arrow/io/caching.cc#L255), and a non-lazy mode where all ranges are read concurrently [at once](https://github.com/apache/arrow/blob/main/cpp/src/arrow/io/caching.cc#L168). In some scenarios, it would help to support a prefetch mode (which naturally is bound to the lazy mode) such that explicitly reading one range will prefetching one or more following ranges . ### What changes are included in this PR? Add a new cache option `prefetch_limit` to define the maximum number of ranges to be prefetched when reading one range in lazy mode. ### Are these changes tested? Yes. A new unit test is included ### Are there any user-facing changes? No. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
