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System Administration Resume

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Atlanta, GeorgiA

SUMMARY:

  • Around 8.5 years of focused IT experience with a proven track record of System Administration, Production Support and Configuration of distributed environments Oracle Coherence, IBM WebSphere, Oracle GoldenGate, Apache Cassandra, Solace Routers & Application Administration being the key strength..
  • Extensive experience in Cassandra Administration, Monitoring, Troubleshooting and Maintenance on UNIX Servers.
  • Worked on Clustering of Cassandra nodes in same/different datacenter.
  • Performance tuning for Cassandra cluster .
  • Installation, configuration and system administration for Casandra 1.0.x/1.2.x/2.0.x.
  • Worked on DevCentre, Opscentre for Cassandra Cluster Monitoring and Administartion.
  • Worked with Solace messaging system to handle solace routers using SolAdmin, configuring and administering of queues, mesh’s, message VPN backbone, ACLs and bridges
  • Extensive experience in Cassandra/ Coherence / WebSphere / Golden Gate Monitoring, Troubleshooting and Maintenance on UNIX Servers
  • Experience in installing / configuring / administering Coherence clusters
  • Experience with Oracle Enterprise manager for cache monitoring.
  • Experience in Installation, Configuration and maintenance of Multiple Domains, Clusters, Admin and Managed Servers and Node Managers on different environments Unix, Solaris.
  • Configured clustering through deployment manager for load balancing and failover functions.
  • Configured and administered Connection pools for JDBC connection
  • Strong experience in Installation, Configuration and maintenance of Multiple Domains, Clusters, on different environments like Unix, Linux.
  • Experience in analyzing the various server logs to perform Root Cause Analysis.
  • Experience in installing Oracle Golden Gate and configuration of various Golden Gate extracts to replicate data from back - end databases onto L2/L3 systems using Solace VPN backbone.
  • Experience in configuring/integrating/troubleshooting loaders, listeners to push data from databases to GRID(cache) servers.
  • Experience with Zookeeper tool, to move configuration files from centralized system to various servers to which it is integrated.
  • Experience in installing Websphere Application Server 6.1 /7.x in Test and Production environments, ensuring the integrity of the certified release of software
  • Strong experience in Administration and Maintenance of WAS clusters (vertical, horizontal) and deployment of applications in highly available, load balanced production environments
  • Experience with SVN tool kits for deploying J2EE applications onto GRID systems.
  • Expertise in Handling Code Releases and Deploying applications in Production.
  • Provided support in major Production outages.
  • Worked closely with development and testing teams to implement fixes in Testing and Production environments.
  • Worked on Change Management to complete changes in production environments.
  • Performing troubleshooting production issues, root cause analysis and preventive actions. Excellent problem resolution and communication skills with ability to work under pressure in a highly visible role.
  • Reporting defects and updating status of defects in defect tracking system
  • Testing and verifying the defect fixes. Review & Work on New Functionalities
  • Effective leader, motivator and team player with excellent planning, coordination, time management, supervision and organizational skills.
  • Commitment, result oriented and interested to learn new technologies.

TECHNICAL SKILLS:

Operating Systems: UNIX, Linux 6.2/7.2/7.2/8, HP-UX 10.20, IBM AIX5.1/5.2/5.3, Solaris7/8/9/10 and Windows NT/2000/2003/XP/Vista.

Web/Application Servers: IBM WebSphere Application Server 6.1/6.0 Oracle Coherence 3.6/3.7/12c, Oracle Golden Gate v11.1, Apache Cassandra 1.0.7/1.2.5/2.1.0

Tools: BMC Remedy, Quality Centre, Visual VM, GITS

Version Control: SVN.

Hardware: Solace

PROFESSIONAL EXPERIENCE:

Confidential, Atlanta, Georgia

Responsibilities:

  • Administrated and maintained online applications with 99.999% availability.
  • Installed, Configured, Administered Apache Cassandra 1.0.7/1.2.5/2.0.9 for providing GRID solutions in terms of data-cache management at cache level, to improve overall experience of end-clients by cutting down end-to-end transaction times.
  • Clustering of Cassandra nodes in same/different datacenter.
  • Worked on different performance check activities of Cassandra Cluster, repairing of data .
  • Worked on issues related to certain nodes failure which have even resulted for decommissioning of nodes .
  • Worked on Prod environment loading data to Casandra, using different methods .
  • Worked on Datastax OpsCentre Installation, for monitoring the Cassandra Cluster across different environments .
  • Worked on creating keyspace for different projects in Cassandra cluster .
  • Performance tuning activities for the Cassandra Cluster across different data centre .
  • Worked on Cassandra Cli, DevCentre for querying the Cassandra cluster .
  • Worked on integrating systems with Zookeeper, a distributed configuration service to synchronize configuration files across large distributed systems to maintain consistency across the nodes.
  • Worked on L2 persistence to have a copy of data which is being sent to Coherence (L2) every time and replicate it to Cassandra (L3), therefore providing provision to re-hydrate the data-back to L2 from L3 in case of data-loss in coherence caches
  • Worked on different kind of coherence nodes like Storage nodes which is used store basic data in forms of cache in a distributed data environment, proxy nodes which acts as a proxy pass for the service clients to connect to storage nodes to access data, management nodes which is used to send JMX metrics of other active nodes on the coherence cluster and thereby used for performance monitoring using Visual VM, wb-storage nodes used to transfer data between coherence and Cassandra
  • Worked with Solace messaging system to handle solace routers using SolAdmin, configuring and administering of queues, mesh’s, message VPN backbone, ACLs and bridges.
  • Worked extensively on Solace routers, to transmit data in terms of messages to multiple datacenters simultaneously.
  • Worked with grid-data-loaders clusters for rehydration of data back to L2 from L3.
  • Worked on cache copy for Coherence data from one datacenter to other in cases of data corruption/loss on any of the datacenter.
  • Worked with CohTool, a utility which is used to backup and delete cache data for a specific cache in a distributed cache environment.
  • Installed, Configured, Administered Oracle Golden Gate at GDDN layer with major components being Golden Gate and Change Processors.
  • Configured Extracts for Golden Gate to replicate data from back-end Billing Databases through remote-pumps. Configured Change processors to sort the data categorized using mappers.
  • Provided technical direction by creating a set of Technical Architecture Standards and a Technology Roadmap for implementing upgraded technologies, Infrastructure Solutions and decommissioning outdated ones.
  • Configured Loaders/Listeners to move data eventually to L2 (Coherence) / L3 (Cassandra) systems where data would be stored as per there cache-names.
  • Experience using the Visual VM for data loading, Eclipse (IDE) to pull data for a specific record and publish values across all the fields, SWM installation package for software management, Toad for the running the DB queries, Dev Center and Cassandra CLI for L3 query.
  • Responsible in Maintaining Remedy system for ticket management.
  • Participate in preparation of Support documents.
  • Provided 24/7 on-call support for production infrastructure components.

Confidential

Responsibilities:

  • Troubleshooting through usage of monitoring tools, querying the database and checking from backend (Unix).
  • Installation, configuration and system administration for Web Sphere Application Server 6.0/6.1/7.0 (WAS) on UNIX.
  • Experience in Configuring, Migrating, Administering of Web Sphere Application
  • Expertise in Handling Code Releases and Deploying applications in Production.
  • Provided support in major Production outages
  • Participate in preparation of Support documents
  • Create Change Requests for application, implementing them and following it to closure.
  • Providing within the team on issue resolving.
  • Involved in providing solution to the trouble tickets, sent by the business team within the SLA .
  • Setting up of connections with the OCAs ( vendors ) connecting through Confidential firewall, communicating with the vendors for issues they are facing in receiving the data ( account details ) from Confidential .
  • Working closely with the development team and also with the business teams to resolve critical issues .
  • Managed application configurable items for release specific activities in 4 release environment.
  • Reporting defects and updating status of defects in defect tracking system
  • Testing and verifying the defect fixes. Review & Work on New Functionalities.
  • Monitored texudo applications using texudo administartion console

Confidential

Responsibilities:

  • Installing and configuring IBM WebSphere and deploying the code in a Clustered environment to create Production, Test and Development environments from scratch for Enterprise e-business applications to run.
  • Tasks like Application deployment, configuration, maintenance, Network Deployment, Refresh and Upgradation of Environment with new versions of the code .
  • Up-gradation of WebSphere servers from 5.x to 6.x in development, testing, QA, and production environment and applying patches
  • Maintenance of various production, development, testing environments and daily maintenance tasks like Bouncing, Hotfixes, Emergency Fixes(Patch Installation for Defect removal).
  • Troubleshooting the Environment for the configuration and connectivity issues against the issues logged by Testing Team and thus ensuring that the environment is available for the testing and development teams for their work.
  • Providing second line support, including faults raised by the testers and working with developers for the resolution of the defects and carrying out various pro-active maintenance activities to minimize defect levels.
  • Trouble shooting with related issues of all the application .
  • Developed and maintain administrative guides for various applications to help support, train and troubleshoot issue. Involved in gather and reviewing requirements for new project
  • Troubleshooting and resolving the problems faced in the testing phase in conjunction with the development team, testing team, networking team and vendors.
  • Experience in setting up multiple domains, machines and clusters
  • Planning and implementing the installation of Hot Fixes or Upgrade on the environment .
  • SSL communication between Administrator server and node manager.
  • Configured clusters, load-balancing and failover solutions
  • Knowledge on distributed systems and the support of highly distributed deployment
  • Installing, Configuring, and troubleshooting WAS, Application server 5.1 and installation of fix packs.
  • WebSphere Performance Monitoring, Tuning and Application-specific load balancing
  • Backup and restore of all Application environments through tools.
  • Supporting, monitoring all Applications at Development, QA and Production phases.
  • Deploying application in WAS on AIX and Solaris using Console and deploying EAR, WAR, JAR files .
  • L2 Production Support .

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