Appendix B. FAQ

B.1. General
Q: When should I use HBase?
Q: Are there other HBase FAQs?
Q: Does HBase support SQL?
Q: How can I find examples of NoSQL/HBase?
Q: What is the history of HBase?
B.2. Architecture
Q: How does HBase handle Region-RegionServer assignment and locality?
B.3. Configuration
Q: How can I get started with my first cluster?
Q: Where can I learn about the rest of the configuration options?
B.4. Schema Design / Data Access
Q: How should I design my schema in HBase?
Q: How can I store (fill in the blank) in HBase?
Q: How can I handle secondary indexes in HBase?
Q: Can I change a table's rowkeys?
Q: What APIs does HBase support?
B.5. MapReduce
Q: How can I use MapReduce with HBase?
B.6. Performance and Troubleshooting
Q: How can I improve HBase cluster performance?
Q: How can I troubleshoot my HBase cluster?
B.7. Amazon EC2
Q: I am running HBase on Amazon EC2 and...
B.8. Operations
Q: How do I manage my HBase cluster?
Q: How do I back up my HBase cluster?
B.9. HBase in Action
Q: Where can I find interesting videos and presentations on HBase?

B.1. General

Q: When should I use HBase?
Q: Are there other HBase FAQs?
Q: Does HBase support SQL?
Q: How can I find examples of NoSQL/HBase?
Q: What is the history of HBase?

Q:

When should I use HBase?

A:

See the Section 9.1, “Overview” in the Architecture chapter.

Q:

Are there other HBase FAQs?

A:

See the FAQ that is up on the wiki, HBase Wiki FAQ.

Q:

Does HBase support SQL?

A:

Not really. SQL-ish support for HBase via Hive is in development, however Hive is based on MapReduce which is not generally suitable for low-latency requests. See the Chapter 5, Data Model section for examples on the HBase client.

Q:

How can I find examples of NoSQL/HBase?

A:

See the link to the BigTable paper in Appendix G, Other Information About HBase in the appendix, as well as the other papers.

Q:

What is the history of HBase?

A:

See Appendix H, HBase History.

B.2. Architecture

Q: How does HBase handle Region-RegionServer assignment and locality?

Q:

How does HBase handle Region-RegionServer assignment and locality?

A:

See Section 9.7, “Regions”.

B.3. Configuration

Q: How can I get started with my first cluster?
Q: Where can I learn about the rest of the configuration options?

Q:

How can I get started with my first cluster?

A:

See Section 1.2, “Quick Start - Standalone HBase”.

Q:

Where can I learn about the rest of the configuration options?

A:

See Chapter 2, Apache HBase Configuration.

B.4. Schema Design / Data Access

Q: How should I design my schema in HBase?
Q: How can I store (fill in the blank) in HBase?
Q: How can I handle secondary indexes in HBase?
Q: Can I change a table's rowkeys?
Q: What APIs does HBase support?

Q:

How should I design my schema in HBase?

A:

See Chapter 5, Data Model and Chapter 6, HBase and Schema Design

Q:

How can I store (fill in the blank) in HBase?

A:

See Section 6.5, “ Supported Datatypes ”.

Q:

How can I handle secondary indexes in HBase?

A:

See Section 6.9, “ Secondary Indexes and Alternate Query Paths ”

Q:

Can I change a table's rowkeys?

A:

This is a very common question. You can't. See Section 6.3.5, “Immutability of Rowkeys”.

Q:

What APIs does HBase support?

A:

See Chapter 5, Data Model, Section 9.3, “Client” and Section 11.1, “Non-Java Languages Talking to the JVM”.

B.5. MapReduce

Q: How can I use MapReduce with HBase?

Q:

How can I use MapReduce with HBase?

A:

See Chapter 7, HBase and MapReduce

B.6. Performance and Troubleshooting

Q: How can I improve HBase cluster performance?
Q: How can I troubleshoot my HBase cluster?

Q:

How can I improve HBase cluster performance?

A:

See Chapter 14, Apache HBase Performance Tuning.

Q:

How can I troubleshoot my HBase cluster?

A:

See Chapter 15, Troubleshooting and Debugging Apache HBase.

B.7. Amazon EC2

Q: I am running HBase on Amazon EC2 and...

Q:

I am running HBase on Amazon EC2 and...

A:

EC2 issues are a special case. See Troubleshooting Section 15.12, “Amazon EC2” and Performance Section 14.12, “Amazon EC2” sections.

B.8. Operations

Q: How do I manage my HBase cluster?
Q: How do I back up my HBase cluster?

Q:

How do I manage my HBase cluster?

A:

See Chapter 17, Apache HBase Operational Management

Q:

How do I back up my HBase cluster?

A:

See Section 17.7, “HBase Backup”

B.9. HBase in Action

Q: Where can I find interesting videos and presentations on HBase?

Q:

Where can I find interesting videos and presentations on HBase?

A:

See Appendix G, Other Information About HBase

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