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JAVA对多线程的两个有用的辅助类(CountDownLatch和AtomicBoolean)
AtomicBoolean可以让一个线程等待另一个线程完成任务后再执行: A boolean value that may be updated atomically. See the java.util.concurrent.atomic package specification for description of the properties of atomic variables. A...
分类:编程语言   时间:2014-08-07 15:41:40    阅读次数:232
Oracle Grid 11.2.0.4 安装是出现“[INS-41112] Specified network interface doesnt maintain connectivity across cluster”错误
安装Oracle 11.2.0.4 的RAC,在Grid 安装时报错:[INS-41112]Specified network interface doesnt maintain connectivity across cluster nodes首先尝试在节点间ping 各个IP 地址没有问题。因为...
分类:数据库   时间:2014-08-07 15:40:10    阅读次数:672
Real-time storage area network
A cluster of computing systems is provided with guaranteed real-time access to data storage in a storage area network. Processes issue request for ban...
分类:Web程序   时间:2014-08-07 12:34:09    阅读次数:437
PyCharm每日技巧-1
To navigate to the declaration of a class, method or variable used somewhere in the code, position the caret at the usage and press Ctrl+B. You may al...
分类:其他好文   时间:2014-08-07 12:12:10    阅读次数:315
Scramble String leetcode java
题目:Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively.Below is one possible represent....
分类:编程语言   时间:2014-08-07 05:11:29    阅读次数:334
阿里云linux主机安装jdk
1、首先要查看服务器的系统版本,是32位还是64位 uname?-a Linux?AY131105092932706327Z?2.6.32-358.6.2.el6.x86_64?#1?SMP?Thu?May?16?20:59:36?UTC?2013?x86_64?x86_64?x86_64?GNU/Linux x86_6...
分类:系统相关   时间:2014-08-06 23:19:32    阅读次数:590
ganglia单播配置
背景: 有时,由于当前网络不支持组播等种种原因,使用gmond默认的配置gmetad不能获取到各个客户端的全部数据,http://x.x.x.x/ganglia页面一个cluster组只能展示一台机器的性能图,此时可使用ganglia的单播功能。###########################...
分类:其他好文   时间:2014-08-06 22:33:22    阅读次数:414
LeetCode第六题,ZigZag Conversion
题目: The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A...
分类:其他好文   时间:2014-08-06 14:59:41    阅读次数:307
Some thoughts..
I think it is natural for an algorithm rookie that when facing a challenging problem, a rookie may fall into her\his algorithm dictionary - she focuse...
分类:其他好文   时间:2014-08-06 14:36:21    阅读次数:232
Administration Commands
Commands useful for administrators of a hadoop cluster.balancerRuns a cluster balancing utility. An administrator can simply press Ctrl-C to stop the ...
分类:其他好文   时间:2014-08-06 08:24:11    阅读次数:345
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