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答复: question about the scanner ordering for gets/scans - HBase - [mail # dev]
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...IMHO, this sorting is not necessary, to be honest, i had tried to exchange the order of sfScanners&memStoreScanners several days before just out of curiosity, and passed all the test c...
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Author: 谢良,
2013-01-31, 03:59
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答复: GC pause issues - HBase - [mail # user]
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...Hi Varun, Please note if you try to increase new generation size, then the "ParNew" time will be up accordingly, and CMS YGC is also a STW. could you have a try to reduce memstore size...
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Author: 谢良,
2013-01-25, 02:07
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答复: Region server Memory Use is double the -Xmx setting - HBase - [mail # user]
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...Please set "-XX:MaxDirectMemorySize" explicitly, else the default is taking the value like -Xmx in currenty JDK6, at least for jdk1.6.30+ Best Regards, Liang ____________________...
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Author: 谢良,
2013-01-23, 02:19
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答复: 答复: Storing images in Hbase - HBase - [mail # user]
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...HBase is not the best choice for blob(photo/image/...) storage(file sizes are ofter smaller than tens of MB). Here are several blob storage systems : google blob storage : https://dev...
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Author: 谢良,
2013-01-06, 06:14
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答复: Storing images in Hbase - HBase - [mail # user]
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...Just out of curiousity, why not considering a blob storage system ? Best Regards, Liang ________________________________________ 发件人: kavishahuja [[EMAIL PROTECTED]] 发送时间: 2013年1月5日 18...
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Author: 谢良,
2013-01-06, 03:58
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答复: Re:Re: 答复: Multiple regionservers on a single node - HBase - [mail # user]
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...Sure, here it is : -Xmx49152m -Xms49152m -Xmn1024m -Xss256k -XX:MaxDirectMemorySize=1024m -XX:MaxPermSize=512m -XX:PermSize=512m -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/home/work/l...
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Author: 谢良,
2012-12-11, 08:42
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答复: 答复: Multiple regionservers on a single node - HBase - [mail # user]
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...I am just a hbase&hotspot vm newbie:) 1)Before look into GC detail, we should turn ontracing flags, e.g. -verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:xxxx -XX:+PrintG...
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Author: 谢良,
2012-12-11, 08:21
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答复: Multiple regionservers on a single node - HBase - [mail # user]
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...Emm, have you tried to tune your GC deeply? please provide the exactly VM options and jdk version and GC logs.. In our test cluster this week, i managed to reduce the longest STW from 22+ se...
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Author: 谢良,
2012-12-07, 09:58
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答复: hbase.client.scanner.timeout.period not being respected - HBase - [mail # user]
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...Did you rebounce your server cluster ? Per HregionServer.java code : this.scannerLeaseTimeoutPeriod = conf.getInt(HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD, ...
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Author: 谢良,
2012-10-19, 03:28
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答复: could not start HMaster - HBase - [mail # user]
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...Is there any complain in HDFS log ? ________________________________________ 发件人: [EMAIL PROTECTED] [[EMAIL PROTECTED]] 发送时间: 2012年10月16日 4:35 收件人: [EMAIL PROTECTED] 主题: RE: could not start ...
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Author: 谢良,
2012-10-18, 03:48
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