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Published on 2010-05-04T07:45:39Z
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Ho do I configure HBase so that the scanner only retrieves a number of records at a time? Or how do I improve the scanner when the database contains a lot of records/
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Introduction
An attempt to combine HBase and HDFS results in the following:
2014-06-09 00:15:14,777 WARN org.apache.hadoop.hbase.HBaseFileSystem: Create Dir
ectory, retries exhausted
2014-06-09 00:15:14,780 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled
exception. Starting shutdown.
java…
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Problem
The first aim was to run HBase standalone. Navigating to ip:60010/master-status is succesfull once HBase has been started.
The second aim is to run a distinct ZooKeeper quorum. ZooKeeper has been downloaded and has been started:
netstat -nato | grep 2181
tcp 0 0 :::2181 …
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Say I have "user". It's the key. And I need to keep "user count".
I am planning to have record with key "user" and value "0" to "9999+ ;-)" (as many as I'll have).
What problems I will drive in if I use Cassandra, HBase or MySQL for that?
Say, I have thousand of new updates to this "user" key, where…
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I'm working on a project with a friend that will utilize Hbase to store it's data. Are there any good query examples? I seem to be writing a ton of Java code to iterate through lists of RowResult's when, in SQL land, I could write a simple query. Am I missing something? Or is Hbase missing something…
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Coming from a SQL Server background, I'm a newbie with regard to HBase, but the technology looks to be a good fit for what we're doing and the cost is definitely right!
I need to maintain a list of log entries which normally I would create in an RDBS as:
create table Log
(
UserID int, SiteID…
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I am getting the following message when I am trying to do a CanonScan 5600F installation and setup from CD-ROM
Archive: /media/CANOSCAN/MSETUP4.EXE
[/media/CANOSCAN/MSETUP4.EXE]
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a…
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My computer previously ran Ubuntu 10.4. After upgrading to 13.4, my Epson scanner no longer can be found by the system. Following documentation, I find the following:
$ sane-find-scanner
# sane-find-scanner will now attempt to detect your scanner. If the
# result is different from what you…
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i have an old scanner mirascan 640p that uses SCSI connectivity ,
it works only with windows 9x but doesn't work with xp and above ,
i found that xp not supporting SCSI by default
so a tried "Advanced SCSI Programming Interface" (ASPI)
http://www.adaptec.com/en-US/downloads/
but it doesn't…
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I'm trying to read a one line file character by character using java.util.Scanner. However I'm getting this exception":
Exception in thread "main" java.util.InputMismatchException: For input string: "contents of my file"
at java.util.Scanner.nextByte(Scanner.java:1861)
at java.util.Scanner…
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Hi,
I have a text file include Student Grades like
Kim $ 40 $ 45
Jack $ 35 $ 40
I'm trying to read this data from the text file and store the information into an array list using Scanner Class
could any one guied me to write the code correctly ?
Here is what I have so far
public class ReadStudentsGrade…
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