Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Save more on your purchases now! discount-offer-chevron-icon
Savings automatically calculated. No voucher code required.
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Hbase Essentials

You're reading from   Hbase Essentials A practical guide to realizing the seamless potential of storing and managing high-volume, high-velocity data quickly and painlessly with HBase

Arrow left icon
Product type Paperback
Published in Nov 2014
Publisher
ISBN-13 9781783987245
Length 164 pages
Edition 1st Edition
Languages
Tools
Concepts
Arrow right icon
Author (1):
Arrow left icon
Nishant Garg Nishant Garg
Author Profile Icon Nishant Garg
Nishant Garg
Arrow right icon
View More author details
Toc

Counters


In the Web 2.0 world, most of the e-commerce applications collect statistics such as user clicks, likes, views, and so on. Earlier this data used to be collected from the application logfiles, which were subsequently analyzed to get the results.

Counters are another advanced and useful feature provided by HBase. Counters allow us to increment a column value with the least overhead by providing a mechanism to treat columns as counters. Using counters enables the potential of real-time accounting and completely takes away the offline batch-oriented logfile analysis.

Normally, incrementing column values requires steps such as locking the row, reading, incrementing, writing the value, and finally releasing the row for other writers. These steps cause a lot of I/O overheads and wait for other writers. Counters avoid all these I/O-centric steps by synchronizing the write operation over a row and incrementing values under a single row lock. Therefore, counters work only with a single row...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime