About the HDFS_READ/WRITE blocks from namenode to datanode

Hi, all I read the namenode.log and found there are HDFS_READ/WRITE operations from namenode to datanode. That is to say, the datanodes read blocks from namenode. I want to know what kind of blocks that the datanodes read from namenode? Should the blocks stored in datanodes, shouldn't tha

答复: Does anyone do related work on the log of hadoop?

are you trying to log/analyse? I self-assigned to me "do better logging for machine analysis", a long time ago, but never sat down to do any of it -yet- https://issues.apache.org/jira/browse/HADOOP-7466 On 23 August 2012 20:44, Li Shengmei wrote: > Hi, all > > I wa

Does anyone do related work on the log of hadoop?

Hi, all I want to do some study on the log of hadoop. I intend to konw how hadoop record the IO in the logs. Does anyone do related work and give some suggestions? Thanks, May

I want to revise the source codes, which version is proper?

Hi, all I want to do some experiments with hadoop. I may revise the source codes of hadoop. Which version is stable for my work? Thanks, May