balanced load thread poll 平衡负荷的线程池
If poll threads are not configured, IDS will start one poll thread.
如果未配置轮询线程，则IDS将启动一个轮询线程。
The recipient can ask the Future to block until a result is ready, poll to see whether it's complete, cancel the computation, or check whether another thread has canceled it.
接收者可以要求Future阻止线程，直至一个结果就绪，检测查看它是否完成并取消计算指令，或检查是否有其他进程取消了它。
Secondly, this thesis discusses the single process, multithread and thread poll concurrency modes to meet the certain performance requirement of different call traffics.
第二部分论述并发模式，针对不同的呼叫流量负载采用了单进程、多线程、线程池几种并发模式，讨论了它们的性能。
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