but, how can it split the data, if there are dependencies in job ? unless we write parallel program, Does hadoop do any thing faster than usual processor?
On Sat, Mar 31, 2012 at 10:32 AM, Karthikeyan V.B <[email protected]>wrote: > Hi, > > The NameNode splits the job into several tasks and submits to the > different DataNode(i.e nodes) , the split size varies from 64KB to 128MB. > The NameNode assigns the data split to a datanod. > > Namenode actually has a table to store the mappings of data node and block > stored in it. > > it is possible to query the namenode and get data from it. > > Regards, > Karthikeyan > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > -- **Regards * * <[email protected]> Bharat B | M.Tech II | C.S.E | IITM * * *Ph: +91 8056127652* -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
