[IGNITE-10703] Queue drainTo should be batched operation

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.7
• Component/s: data structures
• Labels: performance
• Ignite Flags: Docs Required
• Assignee: Unassigned
• Reporter: Dmitry Kiriy
• Created: 15/Dec/18 07:54
• Updated: 15/Dec/18 08:04

Description

Currently drainTo(Collection<T> to, int amount) implemented as cyclic call of poll() method, which is ineffective.

Need to be implemented as truly batch operation - trying to read required amount of data at once.

current design prevent high-performance data transfer cross queue.

P.S. addAll implemented as batch, so together with right drainTo implementation, it will be complete high-performance batched read&write queue solution