在druid集群环境中 broker节点的作用是查询。它知道metadata 通过zookeeper发送到了集群中的哪个节点,从而能够准确的查询到。broker也把各个节点的结果汇聚到一个节点中。On start up, Realtime nodes announce themselves and ...
分类:
其他好文 时间:
2014-08-17 01:00:31
阅读次数:
257
Description
A common pastime for poker players at a poker table is to shuffle stacks of chips. Shuffling chips is performed by starting with two stacks of poker chips, S1 and S2, each stack contain...
分类:
其他好文 时间:
2014-08-16 23:51:21
阅读次数:
505
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.Fo...
分类:
其他好文 时间:
2014-08-16 22:21:41
阅读次数:
235
POJ 3087 Shuffle'm Up (模拟)...
分类:
其他好文 时间:
2014-08-16 21:11:56
阅读次数:
185
RiskRisk is a board game in which several opposing players attempt to conquer the world. The gameboard consists of a world map broken up into hypothe....
分类:
其他好文 时间:
2014-08-16 20:58:21
阅读次数:
342
POJ 3087 Shuffle'm Up(模拟)...
分类:
其他好文 时间:
2014-08-16 17:12:00
阅读次数:
214
Description
Stan has n sticks of various length. He throws them one at a time on the floor in a random way. After finishing throwing, Stan tries to find the top sticks, that is these sticks such th...
分类:
其他好文 时间:
2014-08-16 17:11:52
阅读次数:
272
Whenever technique is really Michael kors uk in operate complete a joy, Just the thing will they be and Cheap Mk ways would you give up restrain us. J...
分类:
其他好文 时间:
2014-08-16 12:22:20
阅读次数:
313
对web系统来说,瓶颈大多在数据库和磁盘IO上面,而不是服务器的计算能力。对于系统伸缩性我们一般有2种解决方案,scale-up(纵向扩展)和scale-out(横向扩展)。前者如扩内存,增加单机性能,更换ssd等,虽然看似指标不治本而且比较昂贵,但确实是非常有效的,大多数应用的数据规模不是很大.....
分类:
数据库 时间:
2014-08-16 12:22:10
阅读次数:
380
一张图像表示成NxN的矩阵,图像中每个像素是4个字节,写一个函数把图像旋转90度。 你能原地进行操作吗?(即不开辟额外的存储空间)
这个题第一感觉就是一次交换矩阵的元素:
比如 3*3 矩阵
1 2 3
4 5 6
7 8 9
先处理第一行,一次逆时针旋转四个元素,下面是二次做的
3 2 9 3 6 9
4 5 6 2 5 8
1 8 7 ...
分类:
其他好文 时间:
2014-08-15 21:10:17
阅读次数:
301