Apache Hadoop is a framework that allows for the distributed processing of large data sets across clusters of computers. It is designed to scale up from single servers to thousands of machines. The library itself is designed to detect and handle failures at the application layer, so delivering a ...

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74 views

Is it possible to have a SQL Server cluster with Hadoop?

I know how Hadoop works. Is there any possible way to have SQL Server run under Hadoop to build a cluster based on SQL Server and not Drill or Hive. Just a wild question. Any good tutorial/...
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1answer
783 views

How often does the Impala StateStore refresh?

I am using Hive and Impala on the same cluster. I find that when I create new tables, the Impala StateStore does not refresh automatically even after a few hours. I know that I can accomplish this by ...
2
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0answers
74 views

incremental update in HBase using sqoop

i am working on a POC where i need to implement same like SSIS for sql to hadoop. out DW are in SQL Server and we want to create a HBase at central location where all the data from diff DW will be ...
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80 views

Options for copying data out of continuously updating tables

I work with a pretty large (O(10^1) TB) DB2 (LUW, v. 9.7) database. It's got data coming in on a continuous basis via Golden Gate replication from another DB2 database. It's used for business ...
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121 views

Exporting an HBase table which is larger than the available HDFS space?

I have a 1TB hbase table which I need to export. Unfortunately I only have 600GB free in HDFS, so I was hoping to export it to a mounted file share. I've learned that the hbase export can only export ...
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195 views

Alternatives for storing 365TB of info

I need to upload daily CSV dumps to a blackbox of my choice, and it should be possible to run queries or create filters over the uploaded data. Daily dumps weight around 1TB and are basically id, ...
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1answer
300 views

MapReduce performance on a single PC [closed]

I have heard that Hadoop has better performance than MySQL. Until now, I have used relational databases so this is really new technology for me. I have a 6 core PC. Suppose I have a table with 20 ...
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1answer
63 views

Can SQL Server 2016 R Services be used to connect to Hadoop data?

I've only been experimenting with SQL Server 2016 recently. So, please correct me if my assumptions are incorrect: From some research on SQL Server R Services, I see that RxHDFSConnect and ...
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1answer
104 views

What is the difference between hadoop, mongoDB, Big data? [closed]

What is the difference between Hadoop, MongoDB, Big data ?
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27 views

PostgreSQL to HDFS to Spark, or PostgreSQL directly to Spark SQL?

If the end goal is to perform computations with Spark, what are the reasons one would first transfer Postgres data to an HDFS (with Sqoop) vs. just using Spark SQL with Postgres directly (with the ...
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1answer
53 views

Postgres or MapReduce to Match Reciprocal Needle Pairs from a Stack of Needles?

I have a Postgres (latest version) table with about a million lines (a_lat, a_lon, b_lat, b_lon) that each have about a dozen criteria. These lines go together in reciprocal pairs (A - B, B - A), ...
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1answer
3k views

Small startup: Cassandra + Hadoop or ElasticSearch

To give some context, I am from a small start up (4 team members) and we work in the education space. We've developed an e-learning platform that several schools are already using. We currently have ...
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1answer
26 views

select two tables and print the columns side by side with matching key in hive

I have the below tables: table_1 name_1 id_1 value_1 avi 1 21 adi 2 X table_2 name_2 id_2 value_2 avi 1 21 adi 2 22 metadata_info: can be read ...
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173 views

Can we query Accumulo data from Apache Drill

Accumulo uses HDFS where as HBase also works on top of HDFS. We can query HBase data through Drill. So can we query Accumulo data also from Apache Drill ?
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463 views

Enabling JMX For Hadoop HDFS & Also MapReduce

I'm having a hard time figuring out how to enable JMX to submit metrics for HDFS and MapReduce jobs in Hadoop (CDH4). I've seen several links and read through 'The Definitive Guide' and 'Hadoop ...
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1answer
24 views

Tools for working with xtrabackup files?

I have database backups in xtrabackup format. I would like to load them into hive without restoring to a mysql instance and use sqoop to then do the transfer. If there are libraries to work with the ...
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1answer
2k views

Problem while connecting to teradata with sqoop

I am trying to connect to Teradat using Sqoop with following command: sqoop import -libjars /usr/lib/sqoop/lib/tdgssconfig.jar,/usr/lib/sqoop/lib/terajdbc4.jar -driver com.teradata.jdbc.TeraDriver -...
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1answer
629 views

MySQL Rows to Columns to HBase (using Sqoop)

I have a table that looks like this in MySQL: id | date | num | avg I have found that I can use this for rows to columns and it works so far: SELECT CONCAT(id, '-', date), MAX(IF(`num` = ...
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1answer
155 views

Cassandra with Hadoop

Cassandra uses Cassandra File System (CFS) and Hadoop uses Hadoop Distributed File System (HDFS) I'm already using Pig over HDFS and i would like to install Cassandra. Having additional servers for ...
0
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1answer
304 views

Storing 5TB web server access log vs OLAP DB

We have over 5TB compressed web server log in a HDFS and we often analyse using Hadoop. It is painful to run map reduce on 5TB of data and most importantly, not many developer are familiar with it. ...
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0answers
17 views

Export data from Hive to Postgres

I would like to save data that I fetch via Hive on a remote Hadoop cluster to my local machine in a Postgres database. I am currently downloading the data as files but I have no idea on how to ...
0
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1answer
65 views

Slow select from one billion rows GreenPlum DB

I've created the following table on GreenPlum: CREATE TABLE data."CDR" ( mcc text, mnc text, lac text, cell text, from_number text, to_number text, cdr_time timestamp ...
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34 views

How to add complex calculations to Elastic Search

I'm using elastic search to index large amounts of sensor data for analytics purposes. The table has 4 million + rows and growing fast - expecting 40 million within the next year. This makes Elastic ...
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0answers
66 views

Backup MYSQL data to HIVE

I have some very large tables in Mysql which I want to backup to Hive. I am using Sqoop for it and it works pretty well. But now, if I have to make any changes in mysql table's schema, I have to ...
0
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1answer
82 views

Fastest way to sync (or keep import) 3.5TB data from hadoop to sharded mongodb cluster

There are 3.5TB data in our hadoop cluster(yes on hdfs). And we have newly built a sharded mongodb cluster(the latest 3.x) with 3 mongos, 3 configdb and 3 shards(each shard has 1 primary and 2 ...
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0answers
14 views

sqoop dir not found in hortronworks virtualbox

when trying to copy sqljdbc driver to /usr/lib/sqoop/lib it gives error cannot create regular file 'usr/lib/sqoop/lib/' No such File or Directory exist any idea what is missing? downloaded ...
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79 views

Can we swap out SQL Server with HBase on our .Net application?

In a current application we use SQL Server. The data flow consists of using TVPs for better-than-bulk-insert performance by passing in DataTables. As part of the data addition process, old records ...