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

1233

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

1736

---

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

1174

---

What is the problem with HDFS and streaming data like logs

1024

---

What is the Use of SSH in Hadoop ?

961

---

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

1009

---

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

1076

---

What is Schema on Read and Schema on Write?

918

---

What is the difference between traditional RDBMS and Hadoop?

1175

---

What is the main purpose of HDFS fsck command?

1792

---

What is safe mode in Hadoop?

961

---

What is MapFile?

970

---

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

1235

---

What happens to a NameNode that has no data?

1587

---

What is a heartbeat in HDFS?

919

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