Jiaming Yuan
bd1f3a38f0
Rewrite sparse dmatrix using callbacks. ( #7092 ) ...
- Reduce dependency on dmlc parsers and provide an interface for users to load data by themselves.
- Remove use of threaded iterator and IO queue.
- Remove `page_size`.
- Make sure the number of pages in memory is bounded.
- Make sure the cache can not be violated.
- Provide an interface for internal algorithms to process data asynchronously.
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bd1f3a38f0