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hadoop 常见错误汇总
1:Shuffle Error: Exceeded MAX_FAILED_UNIQUE_FETCHES; bailing-out Answer:程序里面需要打开多个文件,进行分析,系统一般默认数量是1024,(用ulimit -a可以看到)对于正常使用是够了,但是对于程序来讲,就太少了。修改办法:....
分类:其他好文   时间:2014-09-18 11:16:33    阅读次数:296
Longest Palindromic Substring -LeetCode
题目 Given a string s,find the longest palindromic substring in S.You may assume that the maximum length of S is 1000,and there exist one unique longes....
分类:其他好文   时间:2014-09-17 21:46:02    阅读次数:238
[leetcode] Unique Binary Search Trees (python)
Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST's. 1.....
分类:编程语言   时间:2014-09-17 18:15:12    阅读次数:187
LeetCode Unique Binary Search Trees
Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST's. 1.....
分类:其他好文   时间:2014-09-16 23:21:41    阅读次数:169
MySQL查看表相关外键关系sql
刚接手MySQL数据的时候,经常会遇到主外键关系,有没有E-R图来帮助,职能通过SQL来查询: select   TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME from INFORMATION_SCHEMA.KEY_COLUMN_USAGE where   ...
分类:数据库   时间:2014-09-16 22:11:11    阅读次数:239
Full Text Search 实现Sort的实现方案
CREATE TABLE dbo.pageStore( ID int NOT NULL, StoreName varchar(50) NULL, OwnerOccupation varchar(50) NULL, CONSTRAINT PK_pageStore PRIMARY KEY CLUSTER...
分类:其他好文   时间:2014-09-16 12:35:20    阅读次数:171
Unique Paths II <leetcode>
Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty space i...
分类:其他好文   时间:2014-09-16 10:38:30    阅读次数:236
systemverilog(3)之Randomize
what to randomize?(1) primary input data 1024; data seedthe same seed results in the same random value(5)constraint blocksconstraint constraint_inden....
分类:其他好文   时间:2014-09-16 08:06:30    阅读次数:707
leetcode - Longest Palindromic Substring
Given a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there exists one unique longest pa...
分类:其他好文   时间:2014-09-14 12:49:37    阅读次数:214
FPGA编程技巧系列之输入输出偏移约束
1. 偏移约束的作用 偏移约束(Offset Constraint)用来定义一个外部时钟引脚(Pad)和数据输入输出引脚之间的时序关系,这种时序关系也被称为器件上的Pad-to-Setup或Clock-to-Out路径。这些约束对与外部元器件相连的接口十分重要,在这里,需要解释两个术语: Pad.....
分类:其他好文   时间:2014-09-13 23:58:56    阅读次数:480
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