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Cassandra Dba/devops Admin Resume

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BostoN

SUMMARY

  • Implemented Cloud based Apache Cassandra infrastructure and solr based search infrastructure for web applications
  • Implemented End - To-End Cloud Automation Using Chef
  • Installed Datastax Cassandra 5.0,4.8.5,,4.7,4.6 Production, Pre-prod environments as per best practices
  • Upgraded Cassandra databases 2.0 to 2.1.x versions
  • Configured 4 node Cassandra clusters with 4 datacenters across different countries
  • Experience with Datastax 4.5, 4.6, 4.7.3 and Opcenter 5.0
  • Experience in implementing Cassandra Clusters in AWS cloud environment
  • Experience in Tuning Cassandra for Read/Write Workloads
  • Implemented Time Series Data structure for Networking Application
  • Experience in building scalable and fault tolerant Cassandra production database system
  • Worked in teams with architects to build up Cassandra data models for the application
  • Experience analyzing Big data internal structure in to provide custom results in big data space
  • Experience in storage model in Cassandra and implemented various optimal configuration to meet storage requirements
  • Experience in administrating Cassandra cluster using Opcenter 5.0
  • Experience in integrating Cassandra with Elastic search and Hadoop
  • Experience in installation, configuration and management ofHadoopClusters
  • Worked in various Cassandra Backup-Restore models
  • Worked on Weblogic Release 11g, Release 12.1.1, 12.1.2 & Release 12.1.3
  • Strong experience in installation, configuration, Trouble-Shooting and Maintenance of Oracle WebLogic server 11g and 12c,Oracle Http Server on different environments.
  • Expert in installation of Fusion Middleware Products like Oracle Weblogic(11gR1), OBIEE Suite(11.1.1.6,11.1.1.7), Oracle Universal Content Manager(11.1.1.6,11.1.1.8), Oracle Http Server(11.1.1.7,11.1.1.8), Oracle Identity Management Components(11.1.2.0, 11.1.2.2) like Oracle Internet Directory, Oracle Identity Manager and Oracle Access Manager, Oracle Autovue(20.2.1,20.2.2) and integrating Primavera Unifier applications with these products.
  • Involved in finding Memory Leaks and adjustingJVM HeapSize andGarbage Collectionparameters duringperformance tuningof Weblogic server.

TECHNICAL SKILLS:

Relational Databases: Oracle 11g, 10g, 9i,My SQL 5.0,5.1

NoSql Databases: Cassandra db 1.2,2.0,2.1.x,DSE 5.0

Server Scripting: PERL, PHYTON

High Availability: Failover Clustering, Network Load Balancing, Log Shipping, sharding, apache clusters

Virtualization: VMware 3.1,4,VMware Fusion, MS Virtual Server 2005 R2 MS Terminal Server 2003

Technologies: JMS, JDBC

Network Protocols: TCP/IP Named Pipes, SMTP, HTTP

Web Server: Apache, Oracle HTTP Server 11G

Fusion Middleware: Weblogic Server 12C/11G,Oracle Identity Manager, Oracle Access Manager, Oracle Internet Directory, Single Sign On, OBIEE, Webcenter, Enterprise Manager 12C

Platform / OS: Unix, RedHat Linux 5/6/7, OEL, Windows XP/2008

PROFESSIONAL EXPERIENCE:

Confidential, Boston

Cassandra DBA/DEVOPS Admin

Responsibilities:

  • Responsible for Building, Maintain DSE cluster and upgrading cluster up to 5.0 datastax
  • Implemented Multimode Production DataStax enterprise cluster
  • Maintained complete ownership of Cassandra environment for Dev,QA and Production Environments
  • Helped various teams in creating DataModeling for their applications
  • Implemented backup process using Opscneter 5.2, scheduled backups and periodically restored the backups to lower environments to replicated data
  • Implemented Solr Multi Datacenter witn in Cassandra Clusters
  • Implemented Solr Only Datacenters for Heavy Search based Applications like Store inventory and Product Serarch Applications
  • Migrated Multiple Keyspaces from one Cassandra cluster to other cluster with no downtime for application
  • Upgraded successfully from DSE 4,.6 to DSE 4.7.3 with no downtime
  • Implemented Spark Datacenters for Organizational reporting,Reporting on daily/hourly and every minute bases
  • Completed POC in DSE 5.0 and Opscenter 6.0
  • On Daily bases provided 24/7 support to all development teams and troubleshooted multiple production issues
  • Created operational procedures for Cassandra servers
  • Evaluated and Implemented Time-series Data-Model
  • Raise the Infrastructure tickets to concerned PGBU team for any server issues or networking issues
  • Upgraded Cassandra(DSE) to 2.6.1
  • Implemented 4 DC Production Cassandra Cluster with DSE 4.5 vesion
  • Provided Balckfriday sales support for DSE Cassandra
  • Helped Architectural design decisions in modeling certain applications for Blackfriday sales
  • Provided 24/7 support for operations tasks
  • Migrates 3 node sharded cluster form one node to another node with minimal downtime
  • Upgraded existing Cassandra database from 1.2 to Cassandra 2.0
  • Worked in integrating Cassandra 2.0 with Elastic search
  • Identified GC sweet-spot for the application
  • Identified and helped troubleshooting multiple production performance related issues
  • Work with the tickets raised by customer for OBIEE, UCM, IDM-Suite, OHS and Primavera Issues
  • Testing across the installed products using Hardware Load Balancer and release it to customer
  • Involved into Data Center Maintenance Operations and verify the applications which are all effected and will work to resolve this.
  • Troubleshooting the issues includes Monitoring logs, analyzing the detailed product issues and identifying the fixes

Environment: RHL-5,6, centOs, DSE 4.6.DSE 4.7Mongodb 2.4.8, 2.6 Rabbit MQ, Elastic search, MMS, Dex, TokuDB, Bash scripts,Cassandra 1.2, 2.0,Opcenter 5.0,Mongodb 2.4.8,2.6,Hadoop,AWS, Rackspace, Oracle Linux, Chef Oracle Identity Manager, Oracle Access Manager, 11.1.2.2.0 (PS2), Oracle Internet Directory, Oracle Virtual Directory 11.1.1.7, SOA Suite 11.1.1.7, OBIEE 11.1.1.7, Webcenter Content 11.1.1.8, Oracle HTTP Server 11.1.1.7, Primavera Unifier 10.X, 15.1, 15.2 using CHEF

Confidential, Philadelphia

Oracle Fusion Middleware Consultant/WebLogic Admin

Responsibilities:

  • Capturing all the requirements and building an approach for standalone or clustered environments.
  • Create the require database schemas manually or using RCU.
  • Responsible for Installing, configuring, patching of Oracle Weblogic server, OBIEE, Webcenter Content, Identity and Access Management Suite, Primavera Unifier and Oracle HTTP Server as Stage, Development & Production Environments.
  • Install and configure OBIEE, Webcenter, Identity and Access Management Suite, OHS, Webgates using CHEF Scripts (15.1,15.2 & 16.1) as Stage, Devolopment and Production Environments.
  • Configured Unifier and P6 connector and created Application Instances in OIM for provisioning the users.
  • Resolved many user-provisioning issues for unifier
  • Created & Scheduled Unifier job in OIM for source reconciliation
  • Define entitlements and roles for self-request by the end-user
  • OIM Sandbox customization for UI development
  • User provisioning in OIM, Automatic provisioning of user resources using third party application
  • Fixed corrupted IT resource when unable to provision the user
  • Configuring Webgates for SSO authentication for IAM, Unifier, OBIEE, Webcenter
  • Upgrading OAM and OIM from 11.1.2.0 to 11.1.2.2 in Production environment
  • Memory & performance level issue troubleshooting in Oracle Internet Directory & Oracle Access Manager servers
  • Implemented Integration between OIM and OID and Configured Active Sync.
  • Upgrading Unifier 10.1 to Unifier 10.1.X and 15.1 to 15.1.X
  • Deploying SKU applications (Primavera Project Controls) to Unifier
  • Installed and configured BI Publisher environment and integrated to Unifier.
  • Integration of Webcenter with Unifier
  • Having Hands-On Implementation Experience on OIM Email Notifications
  • Ran OIM Reconciliation jobs to handle the users sync from OID and to refresh Application Instances.
  • Handling Migration through CLI scripts for DB, UCM & OIM for Unifier build Customers 10.1.X and 15.1.X
  • Raise the Infrastructure tickets to concerned PGBU team for any server issues or networking issues.
  • Work with the tickets raised by customer for OBIEE, UCM, IDM-Suite, OHS and Primavera Issues.
  • Testing across the installed products using Hardware Load Balancer and release it to customer.
  • Involved into Data Center Maintenance Operations and verify the applications which are all effected and will work to resolve this.
  • Troubleshooting the issues includes Monitoring logs, analyzing the detailed product issues and identifying the fixes.

Environment: Oracle Identity Manager, Oracle Access Manager, 11.1.2.2.0 (PS2), Oracle Internet Directory, Oracle Virtual Directory 11.1.1.7, SOA Suite 11.1.1.7, OBIEE 11.1.1.7, Webcenter Content 11.1.1.8, Oracle HTTP Server 11.1.1.7, Primavera Unifier 10.X, 15.1, 15.2 using CHEF

Confidential, Newyork

WebLogic Admin

Responsibilities:

  • Provided production support (24/7) and coordinated with developers, Management and end users to resolve critical issues
  • Actively involved in adding new features and configuration changes for the existing environments
  • Configured Node manager to remotely administer managed servers
  • Extensive experience in problem tracing, WebLogic log files and troubleshooting problems related to the applications deployed on WebLogic Application Server
  • Configuration and administration of connection pools for JDBC connections
  • Configured and created WebLogic domains, clusters, servers, connection pools, JMS queues and topics
  • Worked with the BMC Remedy ticketing tool for creating work requests and problem solving issues
  • Extensively worked in Production deployments, monitored and troubleshot J2EE applications.
  • Assisted to improve the overall performance of J2EE applications services on BEA WebLogic Application Server Platforms.
  • Configure OHS with WebLogic and monitored the applications.
  • Setting up the cluster environment for WebLogic Server.
  • Worked on UNIX command line utilities and has hands on experience on UNIX commands to-support the environment.
  • Responsible for deploying various types of application packages including JAR, WAR and EAR files.
  • Tuned JVM parameters for the memory related issues.
  • Monitor Application Server services and resources
  • Modify or add services to an active domain

Environment: WebLogic Server 11g,Oracle HTTP Server (11.1.1.7,11.1.1.8),Red Hat Linux, Oracle 11g.

Confidential

WebLogic Admin

Responsibilities:

  • Involved in installing and configuring the WebLogic Application Server 10.3 on Red Hat Enterprise Linux 4.0
  • Installation, Configuring, troubleshooting and maintaining the OHS Web server
  • Created WebLogic domains, managed servers, clusters and machines.
  • Configuring WebLogic server as per the project requirements like Connection Pools, Data Sources
  • Configured JDBC resources, data sources and bounded to the J2EE applications, configured the connection pools for data sources.
  • Tuned JVM parameters for the memory related issues
  • Managing and Monitoring the JVM performance by Weblogic Heap Size, garbage collection, JDBC Pools and taking Thread dumps and analyzing to find the problems in application
  • Deployed Applications like (WAR, JAR, and EAR) on WebLogic Server
  • Worked extensively with applications that have OHS as front end and oracle as the backend
  • Involved Release management and deployment process
  • Extensively worked on Weblogic clustering, load balancing and performance tuning
  • Created and maintained UAT/Pre Production and Production environments
  • Trouble shooting, Performance tuning and Capacity Monitoring of Applications Servers using Wily 6.1
  • Understood the working of overall architecture along with application flow for faster and efficient troubleshooting

Environment: WebLogic Server 10.3,J2EE, JSP, Servlets, Wily 6.1,Oracle 9i/10g, RHEL 3/4/5.0 UNIX.

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