org.apache.hadoop.mapred.JobInProgress Maybe you find this class.
On Mon, Nov 29, 2010 at 4:36 AM, Da Zheng <[email protected]> wrote: > I have a problem with subscribing mapreduce mailing list. > > I use hadoop-0.20.2. I have added this parameter to mapred-site.xml. Is > there any way for me to check whether the parameter has been read and > activated? > > BTW, what do you mean by opening a jira? > > Thanks, > Da > > > On 11/28/2010 05:03 AM, Arun C Murthy wrote: > >> Moving to mapreduce-user@, bcc common-u...@. Please use project >> specific lists. >> >> mapreduce.reduce.slowstart.completed.maps is the right knob. Which version >> of hadoop are you running? If it isn't working, please open a jira. Thanks. >> >> Arun >> >> On Nov 27, 2010, at 11:40 PM, Da Zheng wrote: >> >> Hello, >>> >>> I found in Hadoop that reducers starts when a fraction of the number of >>> mappers >>> is complete. However, in my case, I hope reducers to start only when all >>> mappers >>> are complete. I searched for Hadoop configuration parameters, and found >>> mapred.reduce.slowstart.completed.maps, which seems to do what I want. >>> But no >>> matter what value (0.99, 1.00, etc) I set to >>> mapred.reduce.slowstart.completed.maps, reducers always start to execute >>> when >>> about 10% of mappers are complete. >>> >>> Do I set the right parameter? Is there any other parameter I can use for >>> this >>> purpose? >>> >>> Thanks, >>> Da >>> >> >> > -- -----李平
