SUMMARY

• Overall 6+yrs in IT Which related to Cassandra, Python and Java on Experience in building Cassandra cluster
• Monitoring Cassandra cluster for resource utilization.
• Managing Cassandra clusters using Datastax opscenter
• Knowledge of Cassandra systems backup and recovery
• Knowledge of Cassandra security
• Knowledge of Cassandra maintenance and tuning - both database and server
• Openstack VM management using provisioned cluster and PHP portal creation for VM management.
• Automatic Spinning Database as a service over cloud using chef/Puppet
• Perform routine management operations, including configuration and performance analysis for mongodb
• Collect data that introspects the performance of query and update operations on a mongodb instance.
• Diagnosing Performance Issues for mongodb
• Set the procedure of restoring a replica set from an archived backup such as a mongodump or MMS Backup file.
• Creating MongoDB data set backups using system-level file snapshot tool, such as LVM or native storage appliance tools.
• Experience in Database Administration, development, design, maintenance and production support of relational databases, business applications, new server setup, MySQL Server installation, upgrade, migration.
• Have successfully managed high availability of production systems for Corporate Sectors and Individual Organizations as MySQL DBA.
• Strong MySQL skills and brief general system administration skills on UNIX/HP Open VMS, Linux and Windows environment.
• Expertise in Shell Script, PHP backend.
• Experience in the administration of Web based Internet/Intranet Client/Server multi-tire distributed application, major in database technologies in Consulting, Sales & Finance, Telecom, Quality & Standards domains.
• Tested SOAP and REST web service calls

TECHNICAL SKILLS

Programming Languages: Java/J2EE, Python Scripting

Web Services: SOAP & Rest Services

Framework: Apache Spring, Apache CXF, Camel, Hibernate, Apache Spark, Kafka, Hadoop

Databases: Apache Cassandra, IBM DB2 and Oracle

Management Tools: Datastax Opscenter

Job Scheduling: Autosys, Cron

Version Controls: IBM ClearCase, SVN, CVS, Visual Source Safe

Operating Systems: Windows, Unix, Linux, OS X

PROFESSIONAL EXPERIENCE

Confidential, Naperville, IL

Cassandra Consultant

Responsibilities:

• To meet scale and availability requirements, we selected Apache Cassandra for Cassandra's master less architecture, ability to easily and quickly scale horizontally to meet their growing data store needs.
• Involved in designing, capacity planning and implementing multi-rack Cassandra cluster.
• Implemented and administered Data center Cassandra Clusters based on the knowledge of architecture and data modeling for Cassandra applications.
• Worked on adding and deleting of nodes along with configuration of Node-to-node and client-to-node encryptions by generating and distributing key store and trust store files to all nodes.
• Migrated 10 TB of data from Oracle to Cassandra datacenter 12 nodes that have 4TB drives each using SSTable Loader.
• Worked on performance tuning of cluster using Cassandra Configuration file and JVM Parameters.
• Configured internode communication between Cassandra nodes and client using SSL encryption.
• Evaluated, benchmarked and tuned data model by running endurance tests using JMeter, CassandraStress Tool and OpsCenter.
• Worked on tuning Bloom filters and configured compaction strategy based on the use case.
• Performed importing data from various sources to the Cassandra cluster using Java/Python APIs.
• Configured security features (Authentication and Authorization) for restricting user's access to database. Worked with CQL3 to execute queries on the data persisting in the Cassandra cluster.
• Administered Cassandra cluster using DataStax OpsCenter and Nodetool utility to monitor CPU usage, memory usage and health of nodes in the cluster.
• Configured authorization to Cassandra cluster using Password Authenticator and Kerberos for Hadoop cluster.
• Designed, automated the process of installation and configuration of secure DataStax Enterprise Cassandra using puppet.

Confidential, Austin, TX

Cassandra Administrator

Responsibilities:

• Involved in the process of designing Cassandra Architecture.
• Deployed and maintained 450 Node PROD cluster, 200 node client test, 30 node QA and 10 node Dev.
• Migrated 100 TB of data from one datacenter to another datacenter.
• Integrated AD with Cassandra Authorization.
• Designed, Automated the process of installation and configuration of secure DataStax Enterprise Cassandra cluster using puppet.
• Monitored the cluster with Zabbix.
• Configured internode communication between Cassandra nodes and client using SSL encryption.
• Developed shell scripts along with setting up of CRON jobs for monitoring and automated data backup on Cassandra cluster.
• Created azure templates to automate server creation and DSE deployments.
• Installed and configured Cassandra cluster and CQL on the cluster.
• Experience in upgrading the existing Cassandra cluster to latest releases.
• Experience in using opscenter to monitor cluster Metrics and enable the services and alerts.
• Experience in Unix SHELL Scripting.
• Performed Stress and Performance testing, benchmark on the cluster.
• Tuned the cluster to achieve maximum throughput and execution time based on the benchmarking results
• Migrated the data from one datacenter to another datacenter.
• Configured, Documented and Demonstrated inter node communication between Cassandra nodes and client using SSL encryption.
• Encrypted the data at rest using Gazzang.
• Enabled Ldap Authentication on opscenter.
• Experience in upgrading DSE and applying patches for the existing clusters.
• Configured authorization to Cassandra cluster using Password Authenticator.
• Scheduled repair and cleanup process in production environment.
• Added and decommissioned the nodes based on requirement.
• Encrypted the passwords in configuration files.
• Added a new datacenter to existing cluster and migrated the data using rebuild process

Confidential, Charlotte, NC

Hadoop Administrator/Cassandra Developer

Responsibilities:

• Involved in start to end process of Hadoop cluster setup where in installation, configuration and monitoring the Hadoop Cluster.
• Responsible for Cluster maintenance, commissioning and decommissioning Data nodes, Cluster Monitoring, Troubleshooting, Manage and review data backups, Manage & review Hadoop log files.
• Installation of various Hadoop Ecosystems and Hadoop Daemons.
• Responsible for Installation and configuration of Hive, Pig, HBase, Sqoop, flume on the Hadoop cluster.
• Configured various property files like core-site.xml, hdfs-site.xml, mapred-site.xml based upon the job requirement.
• Involved in loading data from UNIX file system to HDFS.
• Provisioning, installing, configuring, monitoring, and maintaining HDFS, Yarn, HBase, Flume, Sqoop, Oozie, Pig, Hive.
• Monitored workload, job performance and capacity planning.
• Installing, Upgrading and Managing Hadoop Cluster on Cloudera distribution.
• Trouble shooting many cloud related issues such as Data Node down, Network failure and data block missing.
• Experience with UNIX or Linux, including shell scripting.
• Managing and reviewing Hadoop and HBase log files.
• Solution planning with Java EE, Cassandra & SOA platforms.
• Involved in supporting Design and analysis by providing POC’s by using Cassandra DB, Apache Kafka
• Provide road map for the Cassandra conversion and implementation support
• Develop Cassandra Data model considering current functionality and business need of application
• Provide Solution in re-write of DB operations through Datastax driver
• Building components by using Spark SQL and streaming
• Technical Analysis and implementation Approach planning & validation
• Design Document preparation, coding, unit, integration & performance testing support
• Closely associated with Cassandra DBA in implementing Cassandra data model in application environment to ensure solution is not affecting existing business as usual
• Worked on data conversion by extracting data from DB2, reform data, and load data into Cassandra nodes
• Provided support in application code implementation and post production support
• Suggested flight mode implementation to open live traffic on both data models

Confidential

Jr. Python Developer

Responsibilities:

• Create a Python application for ERM system.
• Used Django web based apps for Insurance premium calculations.
• Designed and developed components using Python.
• Designed unit test framework for new code.
• Used GIT Subversion version control tool to coordinate team-development.
• Implemented database access and data manipulation functions using MySQL.
• Update and Replace Java, C++ application in Python.
• Designed the architecture of the hardware environments and methodology of the code.
• Experienced in Agile Methodologies and SCRUM Process.
• Involved in entire lifecycle of the projects including Design, Development, and Deployment, Testing and Implementation and support.
• Used Pandas library for statistical Analysis.
• Used Numpy for Numerical analysis for Insurance premium.

Environment: Python, Django, MySQL, Linux, HTML, GIT, CSS, JavaScript and Apache Web Server.

Confidential

Java Developer

Responsibilities:

• Involved in Design, Development and Support phases of Software Development Life Cycle (SDLC)
• Reviewed the functional, design, source code and test specifications
• Involved in developing the complete front end development using Java Script and CSS
• Author for Functional, Design and Test Specifications
• Implemented Backend, Configuration DAO, XML generation modules of DIS
• Analyzed, designed and developed the component
• Used JDBC for database access
• Used Data Transfer Object (DTO) design patterns
• Unit testing and rigorous integration testing of the whole application
• Written and executed the Test Scripts using JUNIT
• Actively involved in system testing
• Developed XML parsing tool for regression testing
• Prepared the Installation, Customer guide and Configuration document which were delivered to the customer along with the product

Environment: Java, JavaScript, HTML, CSS, JDK 1.5.1, JDBC, Oracle10g, XML, XSL, Solaris and UML