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达到Apache Storm的极限(Reaching limits of Apache Storm)

 我们正在尝试使用Apache Storm实现Web应用程序。  
 应用 
 收到大量的广告请求（ 100 TPS - 一百次交易/秒）， 
 然后对它们做一些简单的计算 
 将结果存储在NoSQL数据库中 
 最大延迟为10毫秒 。  
 我们正在使用Cassandra作为其写作功能的接收器。  
 但是，我们已经超过了8 ms要求，我们在100ms 。  
 我们尝试使用螺栓的并行性来最小化缓冲区（Disruptor缓冲区）的大小并平衡拓扑。  
 但我们仍然在20ms 。  
 有4名工作人员（8核/ 16GB），我们的20k TPS为20k TPS ，仍然非常低。  
 是否有任何优化建议或 
 我们刚刚达到Apache Storm的极限Apache Storm 
 （ Java限制）？ 

We are trying to implement a web application with Apache Storm. 
Application
receives a huge load of ad-requests (100 TPS - a hundred transactions / second ),
makes some simple calculation on them and then 
stores the result in a NoSQL database
 with a maximum latency of 10 ms. 
We are using Cassandra as a sink for its writing capabilities. 
However, we have already overpassed the 8 ms requirement, we are in 100ms. 
We tried to minimize the size of buffers (Disruptor buffers) and to well balance the topology, using the parallelism of bolts. 
But we still in 20ms. 
With 4 worker ( 8 cores / 16GB ) we are at 20k TPS which is still very low. 
Is there any suggestions for optimization or
are we just reaching the limits of Apache Storm
(limits of Java)?

原文：https://stackoverflow.com/questions/31336126

更新时间：2022-03-04 13:03

最满意答案

 您必须访问ColumnStyles集合的索引：  
With TableLayoutPanel1.ColumnStyles(1)
  .SizeType = SizeType.Absolute
  .Width = 32
End With
 
 如果您尝试设置单行的宽度，那么除非您使用SetColumnSpan跨列来使多列成为单个列，否则这种情况确实无法实现。 这需要将控件放置在单元内。 

You would have to access the index of the ColumnStyles collection: 
With TableLayoutPanel1.ColumnStyles(1)
  .SizeType = SizeType.Absolute
  .Width = 32
End With
 
If you are trying to set the width of a single row, then that really isn't possible unless you span the column using SetColumnSpan to make multiple columns into a single column. That requires a control to be placed inside the cell.

达到Apache Storm的极限(Reaching limits of Apache Storm)

最满意答案

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