What happens when a datanode fails ?

841

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In Hadoop, which file controls reporting in Hadoop?

830

---

how can you debug Hadoop code?

898

---

For a job in Hadoop, is it possible to change the number of mappers to be created?

836

---

What are the primary phases of a Reducer?

884

---

how indexing in HDFS is done?

901

---

What is the role of a MapReduce partitioner?

866

---

Is it important for Hadoop MapReduce jobs to be written in Java?

900

---

what job does the conf class do?

847

---

What is the key- value pair in Hadoop MapReduce?

739

---

What is InputFormat in Hadoop MapReduce?

729

---

What are the various InputFormats in Hadoop?

699

---

Explain InputSplit in Hadoop MapReduce?

730

---

How much space will the split occupy in Mapreduce?

729

---

What is a RecordReader in Hadoop MapReduce?

726

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