Did you ever ran into a lop sided job that resulted in out of memory error

1218

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What is the communication channel between client and namenode/datanode?

1734

---

What is the difference between Gen1 and Gen2 Hadoop with regards to the Namenode?

1172

---

What is the problem with HDFS and streaming data like logs

1022

---

What is the Use of SSH in Hadoop ?

959

---

What infrastructure do we need to process 100 TB data using Hadoop?

1004

---

What is the difference between a Hadoop and Relational Database and Nosql?

1076

---

What is Schema on Read and Schema on Write?

916

---

What is the difference between traditional RDBMS and Hadoop?

1170

---

What is the main purpose of HDFS fsck command?

1792

---

What is safe mode in Hadoop?

960

---

What is MapFile?

964

---

What do you understand from Node redundancy and is it exist in hadoop cluster?

1231

---

What happens to a NameNode that has no data?

1585

---

What is a heartbeat in HDFS?

917

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