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

1166

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

1688

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

1123

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What is the problem with HDFS and streaming data like logs

968

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What is the Use of SSH in Hadoop ?

920

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

955

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

1026

---

What is Schema on Read and Schema on Write?

863

---

What is the difference between traditional RDBMS and Hadoop?

1127

---

What is the main purpose of HDFS fsck command?

1717

---

What is safe mode in Hadoop?

900

---

What is MapFile?

926

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

1184

---

What happens to a NameNode that has no data?

1537

---

What is a heartbeat in HDFS?

882

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