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2010-04-24

Yahoo也发布了云计算平台上的Benchmark数据集

Posted in 实验室, 云计算 at 20:36 by 仲远

标签:
Zhongyuan Wang

97100fe403b8

Yahoo! Research is pleased to announce the release of the Yahoo! 
Cloud Serving Benchmark, YCSB v. 0.1.0, as an open source package. 
YCSB is a common benchmarking framework for cloud database,
 storage and serving systems. Results for benchmarking HBase, 
Cassandra, PNUTS and MySQL will be presented at the upcoming 
ACM Symposium on Cloud Computing on June 11. The toolkit is 
extensible to supp...查看全文

2010-04-16

一场火山爆发所引发的“蝴蝶效应事件”

Posted in 随笔, 实验室, 云计算 at 20:26 by 仲远

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一场火山爆发所引发的“蝴蝶效应事件”

????????????????????????????????????……“??”?????????????????
??????????????????????????????????????????????????????????????????????????????“???”??????????????????????4?16???????1.7????????????

?“????”????????????????????????????????????“???????”??????????????????????????????????????????????
?????????????????????????????????????“??”??

...查看全文

2010-04-04

Hive启动报错解决方法

Posted in 云计算 at 0:04 by 仲远

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??Hive??????
wamdm@WAMDM5:~/hive/build/dist/bin$ ./hive
Exception in thread “main” java.lang.NoClassDefFoundError: org/apache/hadoop/hive/conf/HiveConf
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:247)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:149)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hive.conf.HiveConf
        at java...查看全文

2010-03-25

HBase中的HMaster对象讨论

Posted in 云计算 at 13:17 by 仲远

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????HBase?????????????????????HMaster??????HMaster???????getClusterStatus()?getConfiguration()?getRootRegionLocation()?getServerManager()????????????
???????????????????????API??????????HBase?????????HMaster??????????new HMaster(conf)???HMaster??????????????HMaster????????????????
?????????HMaster??????????????????Client???????????????????????HMaster???????????HBase??????????????Client??????????
(1)?Client????????HBaseAdmin???HMasterInterface?????????????????????
HBas...查看全文

2010-03-04

实验级别的云计算系统节点配置要求

Posted in 云计算 at 21:42 by 仲远

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?????????????????????????????????????????????????????????????????????????????????(?????)???????
CPU?1~2 quad-core CPUs
RAM?8~16GB memory
DISK?1T disks
NETWORK?1G Ethernet
????????????????????????????????????????????????????????????????
?????????????????????????PC???????????????????????????????????????????PC??????????1???????????????????????3?4?????????????????????????PC?????????????PC????????1?CPU???????4??????????????2?CPU???????????????
?????????...查看全文

2010-01-31

完成双核云数据管理系统初步开发,启程回家

Posted in 实验室, 云计算 at 1:40 by 仲远

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?????????????????????????????????????????????????????????????
1??????????????????
2???????????????????????????
3?????????????????????????????CDR???????????SQL??????
4??????????????
?????????????????????????????????????
?????????????????????????????
????????

...查看全文

2010-01-25

Ubuntu Server中设置用户最大打开文件数量的方法

Posted in 云计算 at 23:42 by 仲远

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??????HBase-0.20.2??????????????Hbase????????“?????????”?a file handle hog???????????????????????Ubuntu Linux????????????????????
1???pam_limits.so ????????????
sudo vim /etc/pam.d/common-session 
???????
session required pam_limits.so
2??? sudo vim /etc/security/limits.conf ????????
hbase - nofile 32768
??????
* - nofile 32768
?????
???????????????????????32768??????????????
3?????Shell??? ulimit -a ???????
core f...查看全文

2010-01-22

Hbase 0.20.2在启动时的小bug

Posted in 云计算 at 13:58 by 仲远

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Hbase 0.20.x??????????DEBUG???????????????????????Exception????????????
??????????Exception?????Hbase????????????Exception?
java.io.IOException: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /hbase/master
        at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddressOrThrow(ZooKeeperWrapper.java:332)
        at org.apache.hadoop.hbase.zookeeper.ZooKeeperWrapper.readAddress(ZooKeeperWrapper.java:318)
...查看全文

2010-01-19

Hbase重启之后就无法启动的原因及解决办法

Posted in FreeBSD/Unix服务器, 云计算 at 15:33 by 仲远

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Hbase?????????????
?????Hbase 0.20.2???????2???????
?????????????????????Hadoop/Hbase?”Getting Started”?????Hadoop?Hbase?????????Hadoop?Hbase?????table??????
????????Master????? http://10.37.17.252:60010/master.jsp ?????????????regionserver??????2?127.0.0.1?regionserver?????????conf/regionservers?master???regionserver?
Region Servers
Address Start Code Load
127.0.0.1:60030 1263383321075 requests=0, regions=0, usedHeap=0, maxHeap=0
127.0.0...查看全文

2010-01-10

Hbase配置和开发中的几个注意事项

Posted in 云计算 at 16:04 by 仲远

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???Hadoop?Hbase???????????????????????????????????????????????????????????????????Hbase?????????????????
(1)??????????
???????????????WAMDM1???????????????2????/etc/hosts ?? /etc/hostname
(2)??Classpath???
?????Java??Classpath??????????/etc/environment ?????????????
(3)??Hbase??????????Hbase????? hbase-default.xml ?? hbase-site.xml ???
?????????????????hbase-site.xml?????CLASSPATH?????????Hbase?????????Hbase?API????????????Eclipse????????????Eclipse??????....查看全文

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