Bigdata, HDP Search, Solr, SolrCloud

SolrCloud vs HDPSearch…

Let us start to remove some confusion we have related to SolrCloud and HDPSearch. First what is the SolrCloud:- Apache Solr includes the ability to set up a cluster of Solr servers that combines fault tolerance and high availability, called SolrCloud, these capabilities provide distributed indexing and search capabilities, supporting the following features: Central configuration for the entire cluster. Automatic load balancing and fail-over for queries. ZooKeeper integration for cluster coordination and configuration. Lets clear some confusion on Solr and SolrCloud(ZooKeeper coordinating, Solr with HDFS, HA mode) too:- Solr and SolrCloud are not separate things; Solr is the application while […]

Apache Spark, Hbase

Multiple WAL in Apache HBase 1.3 and performance enhancements!!!

Apache HBase 1.3.0 was released mid-January 2017 and ships with support for date-based tiered compaction and improvements in multiple areas, like write-ahead log (WAL), and a new RPC scheduler, among others. The release includes almost 1,700 resolved issues in total. Below are some bold points on enhancement made in HBase 1.3.0:- The “date-based tiered compaction” support shipped in HBase 1.3.0 is beneficial for where data is infrequently deleted or updated and recent data is scanned more often than an older one. Records time-to-live (TTL) can be easily enforced with this new compaction strategy. Improved multiple WAL support in Apache HBase […]

Bigdata, Database, Hadoop

Cloud Databases & Cloud Blob…

Cloud computing is the next stage in evolution of the Internet. The cloud in cloud computing provides the means through which everything — from computing power to computing infrastructure, applications, business processes to personal collaboration — can be delivered to you as a service wherever and whenever you need. Cloud databases are web-based services, designed for running queries on structured data stored on cloud data services. Most of the time, these services work in conjunction with cloud compute resources to provide users the capability to store, process, and query data sets within the cloud environment. These services are designed to […]

Database, GPU, PostgreSQL

PG-Storm: Let PostgreSQL run faster on the GPU

  PostgreSQL extension PG-Storm, allows users to customize the data scan and run queries faster. CPU-intensive work load is identified and transferred to the GPU to take advantage of the powerful GPU parallel execution ability to complete the data task. The combination of few number of core processors, RAM bandwidth, and the GPU has a unique advantage. GPUs typically have hundreds of processor cores and RAM bandwidths that are several times larger than CPUs. They can handle large numbers of computations in parallel, so their operations are very efficient. PG-Storm based on two basic ideas: On-the-fly native GPU code generation. […]

Database, Hbase, Tephra

Tephra is open-sourced projects that adds complete transaction support to Apache HBase…

Transaction support in Hbase? Yes, a wide range of use case require transaction support. Firstly, we want the client to have great insight and fine-grained control of what the transaction system can do. Having full control on the client side not only allows you to make the best decisions for optimizing for specific use cases, but it also makes integration with third-party systems simpler. Secondly, when different types of components in your application share the data and update the data in multiple data stores in many different ways(Hadoop applications), it is important for the transaction system to support you. Thirdly, […]

Database, HPL

HPL/SQL Make SQL-on-Hadoop More Dynamic

Think about the old days when we solved many business problems using Dynamic SQL, exception handling, flow-of-control, iterations. Now when I worked with couple of migration projects found few business rules that need to transform to Hive compatible (some of them are very complex and nearly impossible). Solution is HPL/SQL (formerly PL/HQL), is a language translation and execution layer developed by Dmitry Tolpeko ( Why HPL/SQL The role of Hadoop in Data Warehousing is huge. But to implement comprehensive ETL, reporting, analytics and data mining processes you not only need distributed processing engines such as MapReduce, Spark or Tez, you […]

Bigdata, Hadoop, NoSql

The ACID properties and the CAP theorem are two concepts in data management to distributed system.

Started working on HBase again!! Thought why not refresh few concepts before proceeding to actual work. Important things comes into mind when we work with NoSQL is distributed environment are sharding and partitions.  Let’s dive into ACID properties of database and CAP theorem for distributed system. The ACID properties and the CAP theorem are two concepts in data management to distributed system. Funny thing they both comes with “C” with totally different meaning. What is ACID: – It is a rule and meant a lot for RDMBS because all RDBMS are ACID compliance. A=Atomicity, means all or nothing, if I […]