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Sr. Oracle Dba Resume

Austin, TX

SUMMARY

  • Over 9 years of experience as an Oracle Database Administrator having hands on experience in database administration, production support, installation, configuration, upgrades, patches, performance tuning, backup and recovery, space management, database security, cloning, migration, shell scripting and documentation.
  • Extensive knowledge on database administration for Oracle 8i, 9i, 10g & 11g with experience within very large scale database environment and mission critical large OLTP and OLAP systems.
  • Excellent experience in installation, setup and configuration of Oracle 8i, 9i, 10g and 11g in HP - UX, Sun Solaris, IBM AIX, Windows and UNIX/Linux Environment.
  • Expertise in upgrading the databases from Oracle 9i to Oracle 10g and Oracle 10g to Oracle 11g.
  • 24*7 production database support with Support to developers & end-users.
  • Installed Oracle 11g ASM & 10g RAC software with ASM & OCFS2 File systems.
  • Experienced in Installation of high availability RAC environment (2, 3 and 4 node clusters) and upgraded standalone databases to 10g RAC environment.
  • Experience in implementation of Golden Gate features to extract and replicate the data between various topologies
  • Proficient in setting up Standby Database using shell scripts and RMAN utility tool, activating and Re-building Standby Databases both Physical and Logical supported by DATAGUARD.
  • Worked in Siebel environment. Have migrated Siebel database into RAC architecture.
  • Managed very large database (VLDB) of maximum size 11TB with 18 servers including 6 Productions, 6 testing, 6 Development and 3 Standby databases.
  • Created development, testing, staging, production, RAC and standby databases for OLTP, DSS and Data Warehousing using customized shell scripts and stepwise.
  • Having hands on experience in Hot/Cold Backup, Recovery and Cloning of databases using RMANwith VERITAS Net Backup.
  • Logical and physical modeling using Erwin. And Expertise using tools like Erwin, ER/Studio and Toad.
  • Implemented RMANbackup (Full, incremental and cumulative) and recovery, incomplete recovery and disaster recovery using Standby database or Data Guard.
  • Implemented automated backup strategy using the UNIX shell script CRON UTILITY.
  • Performance tuning of the database - SQL Tuning, Used Tuning utilities like STATSPACK, TKPROF, EXPLAIN PLAN, AWR, ADDMand Tuning of SGA, Distribution of disk I/O, Sizing of tables and indexes.
  • Data loading using SQL*LOADER, Logical backups using full export and DATAPUMP.
  • Expertise in maintaining Database Security using security compliance auditing, and expertise in loading data from flat files using external tables, SQL*LOADER.
  • Having experience in ODM (oracle data mining).
  • Good experience of creating PL/SQL packages, Stored Procedures, Functions, Triggers and Views to retrieve, manipulate and migrate complex data sets in Oracle Databases.
  • Database replication using snapshots, materialized views and advanced replication methods.
  • Experience in applying security patches to the databases.
  • Effective troubleshooting of database and Performance problems.
  • Good experience in Data Migration using export/import.
  • Management of Objects, Schemas, Partitioning the tables and Indexes.
  • Extensive knowledge of Oracle Architecture, SGA, PGA, LISTENER, TNSNames, V$ and DBA views.
  • Experience in implementation of enterprise databases on enterprise storage solution using Storage Area Network (SAN).
  • Knowledge on Oracle Support Process for Technical requests using Metalink and other support procedures.
  • Excellent interpersonal and strong analytical skills, Documentation & Problem-solving skills with customer service oriented attitude. A very good team player, self-motivated, dedicated in any work environment.

TECHNICAL SKILLS

RDBMS: Oracle 12C/11g/10g/9i/8i/7X, Oracle 10g (RAC, Data Guard & Streams)

OPERATING SYSTEM: HP-UX 10.x, 11.x, Sun Solaris 2.5, 2.6, 8, 9, 10, AIX 5.1, 5.2, 5.3 Red Hat Linux RHEL 2.1, 3.x, 4.x, 5.x,6.x and Windows NT/2000/2003/XP

LANGUAGES: SQL, PL/SQL, T-SQL, MYSQL, C, UNIX Shell Scripting, Ksh, bash and Perl Scripting

SOFTWARES, APPLICATIONS & TOOLS: DBCA, DBUA, Oracle Data Guard, OEM (GC), RMAN, ASM, Clusterware, VCS, Shareplex, SQL*PLUS, SQL*LOADER, EXP, IMP, Data Pump (expdp, impdp), TOAD, Rational Rose, VERITAS Net Backup, DB Artisan, SAN, SQL TRACE, EXPLAIN PLAN, TKPROF, STATSPACK, AWR, and ADDM

WEB TOOLS: HTML

PROFESSIONAL EXPERIENCE

Confidential, Austin, TX

Sr. Oracle DBA

Responsibilities:

  • Installation, configuration, maintenance and tuning of Oracle 11g and 10g on Red hat 5.0, IBM-AIX
  • Successfully upgraded Oracle 10g (10.2.0.4) to Oracle 11g (11.1.0.7) on IBM-AIX nodes.
  • Worked as a part of team in Data Center Migration project for 6 months.
  • Involved in Installation and configuration of Oracle 10g &11gRAC using Cluster ware and ASM.
  • Successfully Migrated Non RAC single instance to Real Application Cluster (RAC) database instances.
  • 24x7 remote support and on call Database support for Database developers & end-users.
  • Experienced in the installation of Oracle Grid Control in Server (OMS Oracle management Server) and installing the Agents in all the production, test and development databases and configuring them.
  • Implemented Streams replication between RAC and non RAC database environments.
  • Successfully configured and installed Oracle Golden Gate for replication.
  • Experience in cloning RAC databases using RMAN tool.
  • Configured Golden gate extract and replicate during the database character set conversion.
  • Configured Golden gate datapump extract to move the trail files from source database server to target database server.
  • Installed Golden gate Director to have a web view of all the golden gate implemented servers.
  • Used Golden Gate Tokens to get the values of modified date, modified user and operation type from trails.
  • Converted Siebel CRM supporting Oracle database into three node RAC database.
  • Worked with Siebel Application support team in improving the Siebel App-DB performance.
  • Experienced in upgrading Siebel CRM 7x, 8 and other version upgrades & also helped CRM teams in day to day data refresh & object refresh for dev CRM analysis.
  • Used to merge statement in golden gate replicate parameter file to insert primary key column, modified date, modified user and operation type in the cdc table
  • Experienced in Design, implementation and generating documentation of Oracle 10g Data Guard on both physical/logical standby databases in high availability mode.
  • Implemented Data guard, creating both Logical and Physical Standby databases in 10g &11gRAC environment for the Production databases.
  • Writing and modifying UNIX shell scripts, Perl scripts to manage Oracle environments and for Backend Oracle Processes.
  • Installed Oracle Streams as an enhancement for the Client’s DW method and monitored Streams Issues using Grid Control.
  • SQL tuning and Database performance tuning has been done based on reports generated by SQL Trace, TKPROF, STATSPACK, Explain Plan, AWR, ADDM and monitor the database performance on daily basis.
  • Planning Backup/Restoration Strategy, Planning and scheduling Backups, taking Logical Backups (with Export/Import Data pump utilities).
  • Creating & Managing Database Structures, Storage Allocations, Table/Index segments, Rollback segments, Constraints, Database Access, Roles and Privileges.
  • Performance tuning of Queries by maintaining Aggregates, Compression, partition, indexing and use of Hints, Stored outlines, Statistics for the same.
  • Performance tuning and diagnosing DBMS and individual Production databases. Organized various migration review meetings with the application team to discuss the migration strategy based on their requirements.
  • Performed policies on data confidentiality, integrity, availability, and auditability, Based on Access Controls for Access to Data at the database level.
  • Performed SQL and PL/SQL tuning, oracle contention and monitored production database using automatic workload repository (AWR), automatic database diagnostic monitor (ADDM) and automatic session history.
  • Logical and Physical Database Modeling using CA Erwin 4.1.
  • Automated the nightly RMAN backups for the Production and Test Databases in Crontab.
  • Creating and Scheduling Oracle Backend Process Jobs in Crontab.
  • Cloning duplicating databases using scripts as well as RMAN.
  • Expertise in recovering the database. Performed complete recovery, data file recovery, incomplete recovery.
  • Experienced in Database Security User Management, Privileges, Roles, Auditing, Profiling, Authentication.
  • Implemented VERITAS Net Backup using RMAN (Recovery Manager) as a media management layer.
  • Applying security patches both Server side and Client side and Performed testing.
  • Worked closely with the Oracle developers for the better performance in Applications in writing the Packages, Triggers, Mat Views and Indexes on the tables.
  • Used Secure SCP & FTP extensively for the File transfers from machines to remote server.
  • Experienced in documentation, provided documentation for database design, analysis, modifications, creating schemas etc.
  • Implementation of Oracle & Application Software Patches and maintaining SW License and maintenance agreements.
  • Resolved TAR issues 24x7 while assisting the functional team and oracle support (Metalink) and managing database security.

Confidential, Indianapolis, IN

Sr. Oracle DBA

Responsibilities:

  • Responsible for administration and supporting Oracle 9i and 10g databases.
  • 24x7 Production database administration, support and monitoring to ensure a proactive problem recognition and resolution of database issues.
  • Successfully migrated databases from windows2000/2003 running oracle 9i over to Linux boxes10g.
  • Installation, Upgrade and Configuration of Oracle 9i and 10g Databases.
  • Involved in designing of disaster recovery plan using Data Guard, and High Availability using RAC.
  • Schemas refresh using Export/Import Pump, Creating the database table spaces, tables, indexes, setting privileges and user logins.
  • Worked for Siebel CRM HR Model performance improvement.
  • Worked with Siebel Application team in enabling performance improving Oracle parameters.
  • Closely worked with Siebel Application team in data refreshment for dev & QA environments.
  • Configuration, Administration and tuning of Oracle 10g and 9i RAC.
  • Data Refreshing Test and Integration Databases using Transportable Table spaces.
  • Performed Setup Recovery Manager (RMAN) and Flash Recovery in RAC Environment.
  • Oracle Streams Bi-Directional replication implementation at Table, Schema and Database Level.
  • Implemented backup strategies using hot/cold, exp/imp used on the business req.
  • Cloning databases using scripts as well as RMAN and performed Table space point in time recovery (TSPITR) using RMAN.
  • Configured Golden Gate replication between Production and Prime Production, Performance and Prime Performance environments.
  • Installed Golden Gate Director to have a web view of all the Golden Gate implemented servers.
  • Installed Golden Gate Veridata to compare the difference between source and target databases.
  • Installed Oracle 10g Enterprise Manager (Grid Control) for diagnosing and monitoring performance related problems and configured with Application servers on test databases.
  • Assisted a team of DBA’s in migration of databases from Oracle 9i Release 2 to Oracle 10g Release 2.
  • Worked on Automatic Storage Management (ASM) with SAN Storage for managing data in EMC Symmetrix.
  • Monitoring and tuning using tools like Enterprise Manager GRID, Oracle cost Based optimizer (CBO), SQL analyzer, automatic checkpoint tuning, SQL Advisors, Performance Manager, and Stats pack.
  • Performed conversion single instance to Real Application Cluster (RAC) database instances.
  • Utilized Oracle Streams to capture, propagate, and apply the transfer of data, transactions, and events within managed databases.
  • Provided database/application tuning including as reducing lock contention, analyzing objects.
  • Down-sizing and defragmenting the Very Large Databases by export / import, cloning those using RMAN duplicate features and then upgrading them to Oracle 10g and Production to development refresh.
  • Storage Management Managing Space, Table spaces, Segments and Extents, Rollback Segments & Data Dictionary.
  • Experienced on Database Security by monitoring User Management, Privileges, and Roles, Auditing, Profiling, Authentication and Risk management.
  • Used Oracle Advanced Replication feature to set up multi-master replication, dealt with conflict resolution and performance issues.
  • Unix Shell scripting in csh, ksh for automating startup/shutdown, backup and recovery, Import and export procedure of databases, getting system alerts.
  • Experienced in documentation, provided documentation for database design, analysis, modifications, creating schemas etc.
  • Resolved TAR issues 24x7 while assisting the functional team and oracle support (Metalink)

Confidential, Boston, MA

Oracle DBA

Responsibilities:

  • Installed RAC on Oracle 10g release1 and worked on ASM feature of Oracle.
  • 24x7 Production database administration, support and monitoring to ensure a proactive problem
  • Recognition and resolution of database issues.
  • Provided instance level performance monitoring and tuning for Event Waits, Sessions, Physical and Logical I/O and Memory Usage.
  • Performance Tuning i.e. Tuning RAC, tuning applications, shared pool, I/O distribution, rollback segments, buffer cache, redo mechanisms
  • Oracle Grid Control Management Server Installation.
  • Used transportable table spaces (TTS) to move the data Oracle on a different platform and also much faster than performing either an export/import or unload/load of the same data.
  • Implementation of 10g Data Guard and Bi-directional streams implementation.
  • Handling large database environments using Oracle Enterprise Manager (OEM) on daily basis observing the performance of the production database and constantly active regarding performance and space management issues and accordingly providing on-fly solutions to make database healthy and running.
  • Made performance improvements to the database by building Partitioned tables, IndexOrganized Tables, Materialized Views and Bitmap Indexes.
  • Supported development effort by providing SQL statement tuning and optimizing ETL procedures and removing load and query performance bottlenecks by using tools Explain Plan, SQL Trace, TKPROF, TOAD and Oracle Enterprise Manager.
  • Performance tuning of Queries by maintaining Aggregates, Compression, partition, indexing and use of Hints, Stored outlines, Statistics for the same.
  • Created Users, Groups, Roles, Profiles and assigned users to groups and granted privileges and permissions to appropriate groups.
  • Implemented and followed data security standards and Security User Management, Privileges, Roles, Auditing, Profiling, Authentication and Risk management.
  • Performed application migrations to non-cluster databases to cluster databases.
  • Devised & Implemented backup strategies using hot, cold, and exports based on the business requirements.
  • Applying security patches both Server side and Client side and Performed testing.
  • Cloned schemas, objects and data on new server using exports from 9i database and imported in 10g using Oracle data pump.
  • Performed conversion Non RAC single instance to Real Application Cluster (RAC) database instances.
  • Trouble shooting of various database performances by proper diagnosis at all levels like SQL, PL/SQL, database design, database tables, indexes, Instance, memory, operating system and java calls.
  • Worked with production DBA team in perfect coordination with seniors and team members.

Confidential

Oracle Developer/ DBA

Responsibilities:

  • 24x7 Database administrations, support and monitoring to ensure a proactive problem recognition and resolution of database issues.
  • Migration of Oracle databases from windows to Linux.
  • Applied patches to Oracle Databases and Oracle Applications.
  • Upgrading development and production databases to Oracle 10g.
  • Proactive database monitoring using 10g grid monitoring tool.
  • Database tuning using SQL-Trace, STATSPACK, EXPLAIN PLAN and TKPROF.
  • Extensive Performance Tuning, Memory (SGA) Tuning, net backup, EMC (Time finder and SRDF), RAID, RAW Devices.
  • Performed database cloning to setup test and development databases.
  • Responsible for optimizing the queries and application tuning.
  • Performed SQL tuning and assist developers with coding PL/SQL.
  • Provided support to Application Database Administrators in designing the database.
  • Used RMAN for backup and recovery. Performed Hot, Cold and Logical backups. And performed backup validations using RMAN.
  • Management of schemas, objects partitioning the tables & indexes.
  • Automation of data load using Korn shell scripting and SQL*Loader.
  • Responsible for setting and managing user accounts, and granting required privileges to users.
  • Performed other DBA activities like including space management and performance monitoring.
  • Experienced in Oracle Database monitoring, troubleshooting and resolve the issues.

Confidential

MS.Net/SQL Developer - Internship

Responsibilities:

  • Developed and modified PL/SQL code to make new enhancements or resolve problems, as per customer requirements.
  • Created complex analytical reports using inline view, lexical parameters with Oracle Reports 9i.
  • Modified Korn shell scripts as per technical specifications.
  • Prepared Data Flow Diagrams for existing PL/SQL code.
  • Involved in coding MS coding.
  • Developer ASP.Net code for web consoles & created ADO.Net interfaces to database.
  • Designed database tables as per technical specifications.
  • Translated business requirements into creation and alteration of database objects: tables, indexes, constraints, triggers and stored procedures.
  • Implemented automated backup strategy using the UNIX shell script CRON UTILITY.

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