What are combiners? When should I use a combiner in my MapReduce Job?

655

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how is a file of the size 1 GB uncompressed

589

---

Is map like a pointer?

671

---

What is the default replication factor?

685

---

How can one increase replication factor to a desired value in Hadoop?

781

---

In Map Reduce why map write output to Local Disk instead of HDFS?

649

---

What is a Record Reader in hadoop?

682

---

What is version-id mismatch error in hadoop?

749

---

how to share the metastore within multiple users?

625

---

What is a partitioner and how the user can control which key will go to which reducer?

637

---

How do you define "block" in HDFS?

630

---

Where is the Mapper Output intermediate kay-value data stored ?

1055

---

How does Mappers run method works?

609

---

What are the components of Apache Pig platform?

513

---

What is Distributed Cache?

604

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