在使用union all的时候,系统资源足够的情况下,为了加快hive处理速度,可以设置如下参数实现并发执行set mapred.job.priority=VERY_HIGH;set hive.exec.parallel=true;设置map reduce个数-- 设置map capacityset...
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其他好文 时间:
2014-07-19 21:37:25
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264
ZigBee is a specification for a suite of high level communication protocols used to create personal area networks built from small, low-power digital ...
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其他好文 时间:
2014-07-19 20:37:21
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212
AlwaysOn group的一个新特性是允许在secondary replica进行backup,将backup的负载从primary replica上移除去。 并且提供了Backup preference选项,用于在AlwaysOn Availability Group环境下对备份进行管理。需要...
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其他好文 时间:
2014-07-18 21:20:36
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170
下面是MSDN关于SYS.dm_hadr_instance_node_map 的解释,我就不在翻译了For every instance of SQL Server that hosts an availability replica that is joined to its AlwaysOn a...
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其他好文 时间:
2014-07-18 19:28:26
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262
echo"大家猜猜0-9的随机数,你一共有3次机会"count=2n=$((RANDOM%10))while((count>=0))doread-p"pleaseinput:"numif(($n==$num))thenecho"congratulation!随机数是$n,你总共猜了$((3-$count))次"exitelif((n<num))thenif(($count==0))thenecho-n"high"elseecho"high,还..
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其他好文 时间:
2014-07-17 09:04:28
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232
英文原文: http://www.codeproject.com/Articles/110931/Building-High-Performance-Queue-in-Database-for-st译文:http://www.oschina.net/translate/building-high-p...
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数据库 时间:
2014-07-16 17:47:26
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379
BACKGROUNDThe present invention relates to video processing systems.Advances in imaging technology have led to high resolution cameras for personal us...
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其他好文 时间:
2014-07-16 17:38:34
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441
Besides bags brands and high quality products with high strength, which takes lata.Materia bonus? look and feel rich. Before buying handbags for women...
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其他好文 时间:
2014-07-16 14:58:21
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407
1、Android手机常见分辨率
WVGA:800x480
FWVGA:854x480
QHD:960x540
720P:1280x720(标清,standard definition,SD)
1080P:1920x1080(高清,high definition,HD)
2、分辨率对应dpi
dpi(dots per inch,每英寸点数)
hdpi对应WVGA、FWVGA、QHD...
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移动开发 时间:
2014-07-16 13:42:42
阅读次数:
406