Thanks all of you, I just get the problem fixed through the command:
hdfs dfs -setrep -R -w 2 /
Is that an issue of HDFS ? Why do i need to execute manually a command to tell the hadoop the replication factor even it is set in hdfs-site.xml ?
发件人: Francis.Hu [mailto:[EMAIL PROTECTED]]
发送时间: Tuesday, July 02, 2013 11:30
收件人: [EMAIL PROTECTED]
主题: 答复: 答复: a question about dfs.replication
Yes , it returns 2 correctly after "hdfs getconf -confkey dfs.replication"
but in web page ,it is 3 as below:
发件人: yypvsxf19870706 [mailto:[EMAIL PROTECTED]]
发送时间: Monday, July 01, 2013 23:24
收件人: [EMAIL PROTECTED]
主题: Re: 答复: a question about dfs.replication
Could you please get the property value by using : hdfs getconf -confkey dfs.replication.
鍦?2013-7-1锛?5:51锛孎rancis.Hu <[EMAIL PROTECTED]> 鍐欓亾锛?br>
Actually, My java client is running with the same configuration as the hadoop's . The dfs.replication is already set as 2 in my hadoop's configuration.
So i think the dfs.replication is already overrided by my configuration in hdfs-site.xml. but seems it doesn't work even i overrided the parameter evidently.
鍙戜欢浜?span lang="EN-US">: 袝屑械谢褜褟薪芯胁 袘芯褉懈褋 [mailto:[EMAIL PROTECTED]]
鍙戦€佹椂闂?span lang="EN-US">: Monday, July 01, 2013 15:18
鏀朵欢浜?span lang="EN-US">: [EMAIL PROTECTED]
涓婚: Re: a question about dfs.replication
On 01.07.2013 10:19, Francis.Hu wrote:
I am installing a cluster with Hadoop 2.0.5-alpha. I have one namenode and two datanodes. The dfs.replication is set as 2 in hdfs-site.xml. After all configuration work is done, I started all nodes. Then I saved a file into HDFS through java client. nOW I can access hdfs web page: x.x.x.x:50070,and also see the file is already listed in the hdfs list.
My question is: The replication column in HDFS web page is showing as 3, not 2. Does anyone know What the problem is?
---Actual setting of hdfs-site.xml
After that, I typed dfsamdin command to check the file:
hdfs fsck /test3/
The result of above command:
/test3/hello005.txt: Under replicated BP-609310498-192.168.219.129-1372323727200:blk_-1069303317294683372_1006. Target Replicas is 3 but found 2 replica(s).
Total size: 35 B
Total dirs: 1
Total files: 1
Total blocks (validated): 1 (avg. block size 35 B)
Minimally replicated blocks: 1 (100.0 %)
Over-replicated blocks: 0 (0.0 %)
Under-replicated blocks: 1 (100.0 %)
Mis-replicated blocks: 0 (0.0 %)
Default replication factor: 2
Average block replication: 2.0
Corrupt blocks: 0
Missing replicas: 1 (33.333332 %)
Number of data-nodes: 3
Number of racks: 1
FSCK ended at Sat Jun 29 16:51:37 CST 2013 in 6 milliseconds
If I'm not mistaking "dfs.replication" parameter in config sets only default replication factor, which can be overrided when putting file to hdfs.