For folks who have deployed HBase on their own clusters, do you feel that it's sufficiently stable for production use? What types of troubles or issues have you run into?
I ... |
Is there any column store database that supports secondary index ?
I know HBase does, but it's not there yet.
Haggai.
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I'm looking for a good and tested HBase tutorial, where I can find one?
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import java.io.IOException;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.util.Bytes;
public class HBaseExample {
public static void main(String[] args) throws IOException {
HBaseConfiguration config = new HBaseConfiguration();
...
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How can I use a Hbase database with C#/VB.NET ?
(use=connect, query, get the result, insert, update, delete)
I don't find useful answers with google.
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Hi there I'm use to SQL, but I need to read data from a HBase table. Any help on this would be great. A book or maybe just some sample code ... |
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 ... |
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I want a web interface for viewing data in HBase (like phpMyAdmin is for mySQL but for HBase). Are there any existing solutions/tools out there?
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One of the first sample schemas you read about in the HBase FAQ is the Student-Course example for a many-many relationship. The schema has a Courses column in the Student table ... |
I have used zohmg and successfully created mapper, table in HBase and test-imported my data (using --local switch).
But I have problem inserting my data after mapping into HBase, this is error ...
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Is there a way to send a batch of hbase puts, compressed.
I'm setting auto flush to false and I'm using a bufferSize of 2MG. Is there a way to compress the ... |
I would like to know how to retrieve data from aggregated logs? This is what I have:
- about 30GB daily of uncompressed log data loaded into HDFS (and this will grow ... |
I'm having problem with using external jars in my file. I always get
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/HBaseConfiguration
at this line: Configuration config = HBaseConfiguration.create();
And this file is on the classpath, I'm ...
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Does the HBase Java client support multi-get (aka bulk fetch), kind of like memcached multi-get? I've scoured the docs and the Internet for at least an hour and couldn't find ... |
I have one question which can be best described by the following scenario.
Suppose I have three tables BaseCategory,Category and products. If i am thinking in terms of RDBMS then the relationship ... |
I am trying to filter rows from a HBase table using two SingleColumnValueFilter objects to bring back all records that fall within a range of long values for the ... |
Is there a way to rollback values to a previous stage at cell level (row level might work also)
I imported a file with wrong data and I just need to go ... |
I'm getting this error message in my log file WARN hbase.HBaseConfiguration: instantiating HBaseConfiguration() is deprecated. Please use HBaseConfiguration#create() to construct a plain Configuration how can I get rid of this? ... |
I have complex objects with collection fields which needed to be stored to Hadoop. I don't want to go through whole object tree and explicitly store each field. So I just ... |
We are trying to use HBase to store time-series data. The model we have currently stores the time-series as versions within a cell. This implies that the cell could end up ... |
Recently, I started working on HBase (one of the column-oriented databases). While going through the source code, one question keeps popping in my head. Thought of asking this.
My question is, how ... |
Greetings,
I have been looking through the questions on this site and I haven't found any related questions.
I have currently built a Flex/PHP/MySQL app where I take an extract from my Hadoop ... |
is there a way to request a binary key type (int, byte array) instead of string using HBase's Stargate?
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HI, I install Hbase 0.89 (oct release) using local filesystem, for dev and test purpose. I created few tables and rows using hbase shell. somehow whenever i restart hbase, no data/table ... |
Dose anyone know what's wrong with hbase? I am using vm image of cloudera distribution for hadoop, previously it was working fine but now giving me this error after every second ... |
I'm starting a personal project that involves storing a large database of objects and the relationships between objects. I chose Hadoop and HBase because it will need to be multi node ... |
The HBase shell is now based on jirb, the JRuby implementation of the interactive ruby shell irb. Are there any nice tricks for interacting with HBase in JRuby ... |
As far as I'm aware the current stable release of HBase, 0.2, does not support replication, although it is being built into the next version.
How would you recommend replicating ... |
I am getting this exception when for a while i didn't communicated with HBase:
org.apache.hadoop.hbase.client.NoServerForRegionException: Timed out trying to locate root region because: Connection refused
is this something related with session expiry, if ... |
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I try to run HBase in a Pseudo-Distributed mode. But it doesn't work after I set hbase-site.xml.
Each time I try to run a command inside hbase shell I get this ... |
I'm having the following issue with Hbase.
I have a script which starts the HBase shell and inserts many rows into a table with a single column. I have tried inserting 10,000 ... |
I created by own HBase java client code, but I am having a really difficult time compiling it and getting it to run. I am compiling from the command line, and ... |
I am trying to connect to an HBase node from a Java application. HBaseConfiguration is key, but the available Javadoc and documentation is really poor and insufficient.
Does anyone have proper examples ... |
I am writting a small Java application to connect to a HBase node. The ZooKeeper connection is successful, but later, I systematically get the following error (I have changed my IP ... |
I'm using hbase-0.90.0. I'm running it in standalone mode. While trying to execute any commands from "hbase shell" it is giving me the following error.
hbase(main):003:0> status 'detailed'
ERROR: org.apache.hadoop.hbase.ZooKeeperConnectionException: org.apache.hadoop.hbase.ZooKeeperConnectionException: org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode ... |
HBase bulk load (using configureIncrementalLoad helper method) configures the job to create as many reducer task as the regions in the hbase table. So if there are few hundred regions then ... |
Is it possible to use HBase as persistence database for ActiveMQ? Anyone had done something similar?
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Is anyone have some experience of writing a Hadoop InputFormat/OutputFormat that get their date from Hbase ?
I'd like something more specific than the HbaseTableInputFormat because my idea is to return my ... |
what is gora? what does it do for us? how it work with hbase? which features dose it have?
do you know a good essay or web page which can help me? ... |
I have recently configured hadoop cluster with two machines(on ubuntu). It works fine so far. But when i try to configure hbase on the above hadoop cluster, it shows error.
Here is ...
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Is it possible to set where condition to hbase row-keys? Suppose I have row-keys 1,2,3,4,5...
I need to query like "where row-key<4"??
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I have a problem while trying to extend HBase Put class.
I have a code like this
public class HBasePut extends Put {
//here i define ...
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Hi guys i am analyzing few things for doing a Proof of concept. I want to convert a Employee payroll database to Nosql. Which is better to use HBASE or Neo4j?
Or ... |
I'm currently evaluating HBase as a Datastore, but one question was left unanswered: HBase stores many copies of the same object on many nodes (aka replication). As HBase features so-called strong ... |
HI can anybody tell me which are the ETL Tools which can be used with Hbase which is the database of hadoop?
I mean to say like how the data in ... |
Possible Duplicate:
HBase schema design
Hi,
i want to have multiple metrics per dimension on my HBase table.
For example 3 metrics for a bunch of 20 dimensions.
What ... |
I have several Hbase tables. I wish to run a map task on each table (each map being a different Mapper class since each table contains heterogeneous data) followed by ... |
I want to store data (as an archive) in two seperate lists one is to be a sort of LIFO stack where new data just gets pushed on top and the ... |
The little bit of description of hbase in the O'Reilly Elephant book shows the use of the 'hbase' command line wrapper to run a map-reduce job using hbase.
However, our code has ... |
I'm pondering the best way to implement a one to many relationship in HBase.
Say an ACCOUNT has many TRANSACTION(s). Is it better to
a) Add columns to a transactions: column family on ... |
I'm searching for tool/database/solution that can help me with aggregating real-time logs and can query them also in real-time.
Basic requirement is ability to deliver results as soon as possible, keeping in ...
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I have started Hadoop and Hbase successfully. But when I try this operation like,
./hbase shell
HBase Shell; enter 'help' for list of supported commands.
Version: 0.20.3, r902334, Mon Jan 25 13:13:08 PST 2010
hbase(main):001:0> ... |
I'm a beginner in HBase.
I need to design my table.
I want to play with the following information:
At the date XX-XX-XXXX, the word 'HELLO' is in document 2,3,4 and the weight of ... |
Any idea about the storage engine used in hbase?
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I'm new to Hbase.I have created a table using hbase shell.By default it's storing on /tmp folder. I want to change the storage location. where I should change the configuration.
Thanks in ... |
I m new to hbase..
There are some errors while creatin table in hbase
hbase(main):010:0> create 'test'
11/05/01 12:40:47 DEBUG zookeeper.ZooKeeperWrapper: Read ZNode /hbase/root-region-server got 192.168.1.72:60020
11/05/01 12:40:47 DEBUG client.HConnectionManager$TableServers: Found ROOT at 192.168.1.72:60020
11/05/01 ...
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I have a hbase table with
Rows: word, Families: date
I want to get a scanner for all the words at the date 'd', how I can do this? So ... |
I need help regarding database. I am trying to create a Java project which uses the data from 25 different XML files to display a graph. My question is can the ... |
I need HBase to store large amount of indexing keywords and values (currently using Redis), but I can't find any C library to connect, write or read HBase.
I Googled, but found ... |
Running Gradle 1.0-milestone-3. I have a sub-project that depends on the following:
libraries.hbase = [
'org.apache.hbase:hbase:0.90.3'
]
libraries.hbase_test = [
'org.apache.hbase:hbase:0.90.3:tests'
]
The dependencies are defined as:
dependencies ...
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Due to legal issues I need to delete old data from HBase.
I found a way to split the region using my criteria and by that moving the old data to the ... |
Trying to install hbase, but the word on the street is that if I don't use a hadoop from the 20-append branch, I'll lose data. This tutorial says ... |
using PrefixFilter("word") it is possible to filter all keys which start with "word".
I am trying to get the opposite, all key which not start with "word".
Is it a filter which ,match ... |
Have been reading up on Hadoop and HBase lately, and came across this term-
HBase is an open-source, distributed, sparse, column-oriented store...
What do they mean by sparse? Does it have ... |
I have a standlone HBase server.
This is my hbase-site.xml:
<configuration>
<property>
<name>hbase.rootdir</name>
<value>file:///hbase_data</value>
</property>
</configuration>
I am trying to write a Java program to manipulate ... |
I sincerely thank you for reading my post.
I'm trying to install LZO 2.03 compression codec on HBase on my server (running Xeon CPUs).
I'm currently running Hadoop 0.20.1 with HBase 0.90.2.
I've followed ... |
is there a method in hbase thrift api that like HBaseAdmin.modifyColumn ? i can't find any method contain "modify" in thrift schema
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I'm working on a large text classification project and we have our text data (simple messages) stored in HBase.
We have two problems, first we would like to use HBase as ... |
I need a filter which is a bit like TimestampsFilter except that it takes a time frame and applies every row with timestamp within this frame.
This is my implementation:
public class TimeFilter ...
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I have been getting INFO level log messages as below:
2011-07-31 15:11:02,910 INFO org.apache.zookeeper.server.PrepRequestProcessor: Got user-level KeeperException when processing sessionid:0x1317f82af4e0004 type:create cxid:0x1 zxid:0xfffffffffffffffe txntype:unknown reqpath:n/a Error Path:/hbase Error:KeeperErrorCode = NodeExists for /hbase
2011-07-31 ... |
I have a set of 200M documents I need to index. Every document has a free text and additional set of sparse metadata information (100+ columns).
It seems that the right tool ... |
I decided to use HBase in a project to store the users activities in a social network. Despite the fact that HBase has a simple way to express data (column oriented) ... |
Can anyone explain how to prevent hbase from updating the cell in the concrete column and key if the value already exists?
For example when the two processes in parallel will write ... |
So, might sound like an odd question, but is it faster to compare 2 String's, or byte[]'s (using Arrays.equals())? I'm working with Hadoop/Hbase, and I get byte[] as the ... |
I try to write some data to hbase with a client program
HBase @ Hadoop runs in a preconfigured VM from Cloudera @ ubuntu.
The Client runs on the system hosting the VM ... |
I am writing a program in Java connecting HBase.
I currently have multiple zookeepers in my enviroment.
Currently I use:
HBaseConfiguration.create()
config.set("hbase.zookeeper.quorum", "146.169.35.29");
it is working fine.
for multiple zookeepers, how do I ... |
See the bottom for the solution.
I'm trying to write some generic handling code, but in 1 of the sub-classes, it requires a Class that is more specific.
So the base class ... |
I'm writing a Hadoop/HBase job. I needed to transform a Java String into a byte array. Is there any differences between Java's String.getBytes() and Hadoop's Bytes.toBytes()?
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I'm using Hbase over Stargate and want to use a scanner with certain filters. In java or thrift, this would be no problem, but I don't find any advice how to ... |
We have installed hadoop cluster. We want to use HBase over it. My hbase-site.xml is below
<property>
<name>hbase.rootdir</name>
<value>hdfs://ali:54310/hbase</value>
<description>The directory shared ...
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I'm sorry if this question is basic(I'm new to nosql). Basically I have a large mathimatical process that I'm splitting up and having different servers process and send the result ... |
i have the following scenario in my hbase instance
hbase(main):002:0> create 'test', 'cf'
0 row(s) in 1.4690 seconds
hbase(main):003:0> put 'test', 'row1', 'cf:a', 'value1'
0 row(s) in 0.1480 seconds
hbase(main):004:0> put 'test', 'row2', 'cf:b', 'value2'
0 row(s) ...
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I'm trying to improve Hbase throughput for increments. Is it possible to "buffer" several increments (for different rows) by setting autoflush to false and then call |
Row:
Key, Family:Qualifier, Value
Key, Family1:Qualifier, Value
Key, Family2:Qualifier, Value
Key, FamilyN:Qualifier, Value
In the Java HBase API we can scan a table row by row and then get a FamilyMap for each row.
Is there any ... |
how to delete all data from solr by command . We are using solr with lily, means hbase .
so can you tell how to delete data from hbase and solr .
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Im working on a project in which i got to use hbase.The project is in java based. I need to know what is the best hbase client api for java.
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As far as i know redis only write-behind in a binary file. but our software requirement is to write behind to hbase using any compatible distributed maps(redis).Is there any way while ... |
i have written a following hbase client class for remote server:
System.out.println("Hbase Demo Application ");
// CONFIGURATION
...
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I have an application which writes to a datastore, so I attempt to send an HTTP request out to the datastore (hbase + stargate). ETIMEDOUT exception, which kills the process.
I ... |
If I want to insert in a table:
row | fam:qualifier | timestamp | value
1 | foo:bar | 12345 | 2
1 | foo:bar | 12346 | 3
1 | foo:bar | 12347 | ...
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I'm trying to do HBase performance monitoring with Aspectj using Hbase metrics and push the results in Ganglia without success.
Logging works, so my aspect is executing, but it won't push ... |
I'm calling importtsv from within a Java class and for some reason it's not loading all of the records. Not sure if this is an actual importtsv problem or something ... |
It is a research project. We will record lot videos everyday, and metadata with log data would be saved in semantic model, RDF or OWL. The video would be used to ... |
The free version only support limited 50 nodes.
If I use 10 times 2T hard disk for one computer. That means 10*2*50 = 1000T
I could save 1000T data, right?
Thanks
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v = data.getValues(XP_PHONE);
for (int i = 0; i < v.length; i++) {
put.add(COLFAM, COL_PHONE, i, Bytes.toBytes(v[i].trim()));
...
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Explanation of the scenario :
Numerous buyers can register with the Hub(market place).There are numerous suppliers with a personalized application and an independent data storage system(it could be a text file,excel sheet,various ... |
the following hBase code returns some weird characters on the front of my rowKey:
"\u0000""\u0014""ei:shrimp:-749…."
The prepended weird characters are '\u0000' and '\u0014', and sometimes '\u0016'. I put quotes in the ... |
I'm attempting to run running HBase in pseudo-distributed mode. I've followed all of the steps in the tutorial.
My hbase-site.xml looks like this:
<configuration>
<property>
...
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I'm almost completely new to HBase. I would like to take my current site tracking based on MySQL and put it to HBase because MySQL simply doesn't scale anymore.
I'm totally lost ... |