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Senior Specialist - Database Administration Resume

Annapolis, MD

SUMMARY:

  • As a Senior Specialist - Database Administration, configured, optimized and managed several databases with size upto 75 TB on 7/24 schedule under HP/UX, SUN,Linux and Windows platforms in Private, Public and Hybrid Cloud Environment.
  • Over 15 years of professional experience in Full DBA Life Cycle in a variety of UNIX and Windows based environments - HP, Solaris, Unix, Linux, Windows NT/2000 with Strong knowledge and experience on Oracle 8/8i/9i/10g/11g/12c/18c Database Server Architecture.
  • Installation, configuration of several databases in non-RAC and RAC nodes - Oracle 10g/11g/12c/18c RAC environment on Sun/Intel Platforms.
  • Installation, configuration and administration of databases - DB2, MySQL and MS-SQLSERVER, MongoDB, AWS-RDS
  • Configured, optimized and managed Two and Tri-Directional Goldengate replication with Conflict Detection and Resolution (CDR) using exceptions table in Oracle RAC environment.
  • Configured and managed SQLSERVER - Logshipping, Mirroring, AlwaysON
  • Configured and managed SQL AlwaysON with Failover Groups and DR spread across two Datacenters.
  • Configured and managed Physical Standby Databases and DataGuard and performed periodic DR tests with flashback feature.
  • Configured and managed DB2 HADR with and without TSAMP.
  • Configured, optimized and managed MySQL - Master-Master (Active - Passive) and (Active - Active) replication.
  • Configured, optimized and managed MySQL NDB Cluster with Data Nodes and Replicas.
  • Configured, optimized and managed MongoDB Replicasets distributed across two Datacenters.
  • Configured, optimized and managed MongoDB Sharded Cluster.
  • Configured and automated backups for production databases on MongoDB, Oracle, MySQL, DB2, SQLSERVER.
  • Performed successful database restore and recoveries (full and point-in-time) for databases on Oracle, DB2, MySQL, SQLSERVER, MongoDB, AWS-RDS.
  • Configured and managed SHAREPLEX.
  • Moved Database monitoring from iLA to Nagios for about 3000 Databases.
  • f DBMS technologies and establishing standards for offering and delivery teams.
  • Expert knowledge of SQL & Datgabase Performance tuning; PL/SQL, database security.
  • Production support of large databases of sizes more than 25 TB.
  • Configured backup and recovery operations with RMAN/Commvalut backup systems
  • Migration of several databases from Oracle 9i into Oracle 10g and 11g environment.
  • Installation and configuration of ASM storage Manager.
  • Migration of terabytes of data into ASM Disk groups.
  • Coordinated RAC configuration with UNIX System Administrators, Storage Administrators, and Network Administrators.
  • Production support of more than 3000 Databases on 7/24 routine.
  • Backup and recovery of databases with RMAN and EMC Symmetry, with ASM storage.
  • Implemented backup and recovery procedures for all DBMS technologies .
  • Experience of scripting with UNIX, PERL and PYTHON to generate capacity planning reports, database server performance reports and backup and recovery procedures and automation of configuration of DBMS technologies.
  • Responsible for complex software installations, upgrades and license verifications, fault detection, escalation and repair, assisting developers with code roll-out and operational troubleshooting, performance metrics collection
  • Design of logical, physical data models with Erwin data modeling tool.
  • Solid skills in database performance factors, monitoring tools and tuning procedures.
  • 6 years of professional experience in Software Development using D2K and VB5 and in Electronic Data Processing.

TECHNICAL SKILLS:

OS: HPUNIX 10/11, Solaris 9,10, RedHat 3.x/4x./5x./6x./7x. Windows

Databases: Oracle 8/8i/9i/10g,10g/11g/12c/18c RAC, 10g/11g/12c/18c DataGuard, DB2, SQL server, MySQL, Timesten, MongoDB, AWS-RDS.

Replication/HA: Goldengate, Streams, Dataguard, SQLAlwaysON, DB2 HADR with TSAMP, MySQL Replication, AWS-RDS, MongoDB Replication.

Programming Languages: C, SQL, PL/SQL, Shell Scripting,PERL,PHYTHON

Protocols: TCP/IP, HTTP, LDAP, NetBEUI Protocols

Database Servers: HP Integrity Superdome, HP 700 Series, Sun 3500,3800,6800, Sun Enterprise 450 & 880, Sun E2900, E4900, E6500

GUI tools: Visual Basic, Developer 6i

Tools: Netcool, Orbit/Oasis, DSView, F-Secure SSH, FTP, OEM,TOAD,SQL*Plus,D2K,Imp/Exp Utility, RMAN, Analyze Comand,MIG80,DBVERIFY,Trace/TKPROF,REPORT.Txt,Statspack,ADDM,ASH,SQL*Loader,SQL*Net, fastcopy, fastunload

PROFESSIONAL EXPERIENCE:

Confidential, Annapolis, MD

Senior Specialist - Database Administration

Environment: DBMS - Oracle RAC 9i, 10g, 11g, 12c, 18c DB2, MySQL, MS-SQLSERVER, AWS-RDS, MongoDB.

Responsibilities:

  • Setup, installation, configuration of Oracle 8i/9i/10g/11g/12c,18c RAC, DB2, MySQL, MSSQLSERVER, AWS-RDS, MongoDB databases on HP/Sun, Linux and WINDOWS environment.
  • Setup, installation, configuration and managing of AWS-RDS, MongoDB-Replicaset, Oracle Goldengate, SHAREPLEX, STREAMS, and AQ.
  • Setup, installation, configuration and managing of DB2 HADR with TSAMP.
  • Setup, installation, configuration and managing of Oracle Dataguard.
  • Setup, installation, configuration and managing of MSSQL AlwaysON.
  • Setup, installation, configuration and managing of MySQL Clustering.
  • Administering more than 3000 production databases - Oracle, MySQL, SQL SERVER and DB2, AWS-RDS, MongoDB with 7/24 support, as part of operations support.
  • As part of operational support, closely worked with System Administrators, Network Administrators and Storage Administrators.
  • Backup and recovery of databases with RMAN .
  • Implemented backup and recovery procedures and standards for the data in excess of 70 TB in capacity.
  • Conducting COA (Client Operational Acceptance) checks. Analyzing the physical designs using Erwin data modelling tool. Builds and implements test, quality assurance, and production databases and environments.
  • Configuring and managing backup and recovery for all DBMS technologies.
  • Plans and coordinates backup and recovery strategies to restore database operations after failures.
  • Partitioned large tables with RANGE, HASH, LIST and composite partition methods for several data mart schemas.
  • Resource of application team in PL/SQL coding and query optimization.
  • Extensive experience with performance tuning at systems and application level.
  • Executes strategies for database migration and changes; Coordinates strategies to move data between databases.
  • Plans, coordinates, and executes strategies to optimize database performance.
  • Monitors database space requirements and adjusts for future needs.
  • Assists in the planning and installation of database management system upgrades
  • Supporting the databases with Applications - Oracle e-Business Suite, PeopleSoft Enterprise, Siebel, Ariba,etc.

Environment: Oracle 8i/9i/10g/11g/12c/18c databases, 9i/10g/11g/12c/18c DataGuard, 10g/11g/12c/18c RAC, Datapump, Export/Import, Physical Backups, DB2, DB2 HADR with TSAMP, MySQL, MySQL-Cluster, SQL Server 2012/2014/2016 , SQLAlwaysON, AWS-RDS, MongoDB, HP 700 Series, Sun 3500,3800,6800, Sun Enterprise 450 & 880, Veritas Clusters, Solaris 2.6 to 10.0, Red Hat Enterprise Linux 6.x, 7.x Windows 2000,Windows XP,TCP/IP, HTTP, LDAP, NetBEUI Protocols, Netcool, Erwin, Shell and perl scripting, OEM, Orbit/Oasis, DSView, F-Secure SSH, F-Secure FTP,iLA, Nagios.

Confidential, Champaign, IL

Environment: Oracle 9i, 10 G 10.2.3.0, HPUNIX 10/11, OEM, PLSQL, EMC, RAID, SAN, UNIX, Linux, Shell scripting, Clustering, RMAN, Commvalut, HP Integrity Superdome, RS 6000, SUN 2900, SUN 6800, SQL/PLSQL, Timesten, fastcopy, fastunload, Shareplex, Golden Gate, Toad, etc.

Sr. Oracle DBA

Responsibilities:

  • Function as a Senior Oracle DBA, participating in the design and implementation of about 200 databases and systems that can support the ongoing company growth.
  • Administer, maintain, and implement policies and procedures for ensuring the availability, security and integrity of the Oracle databases.
  • Assist in developing and administering backup and recovery procedures.
  • Mentor other DBAs in connection with their skill development objectives.
  • Providing Production support of large, 7x24 Oracle database with a size 18TB supporting an active online applications, with rotating on-call duties after hours.
  • Troubleshooting Production problems and working effectively with other team members to identify and address problems.
  • Scripting for database monitoring and to automate routine tasks.
  • Performing data analysis to provide management with timely and accurate information.
  • Performing data management tasks as required loading, editing, restoring and removing data at the requests of our clients.
  • Performing Oracle patches/upgrades.
  • Upgraded and coordinated upgrading of 9i databases to 10g.
  • Tuning of SQL code and assisting developers in writing and tuning SQL queries.
  • Logical and physical database design.

Confidential, Stamford, CT

Environment: Oracle 9i/10G, Solaris 8/9x, OEM, PLSQL, EMC, SAN, UNIX, Linux, Shell scripting, Clustering, RMAN, SQL/PLSQL

Sr. Oracle DBA

Responsibilities:

  • Responsible for review of database architectural design, testing and implementation of any new requirements.
  • Administering all database objects, including tables, indexes, views, schemas, packages and procedures.
  • Monitors and analyzes database performance indicators, resolve problems and recommends improvement actions.
  • Analyzing assigned tasks and provide estimate time frames to complete.
  • Standardizing the implementation of ORACLE databases and improve the management and maintenance for the ORACLE production development, and test environments.
  • Providing technical support and troubleshooting assistance to developers. Identifying production anomalies to developers for their corrective actions for all production releases.
  • Provided optimal system and database configuration.
  • Providing technical services to monitor and maintain production, development, and test databases.
  • Working with internal development team in solving complicated issues for mission critical deliverables.
  • Identifying high load or top SQL statements that are responsible for a large share of the application workload and system resources, by reviewing past SQL execution history available in the system.
  • Verifying that the execution plans produced by the query optimizer for these statements perform reasonably.
  • Implementing corrective actions to generate better execution plans for poorly performing SQL statements.
  • Verifying Optimizer Statistics and ensuring representative statistics in the database.
  • Verified Index structures and created missing indexes.
  • Identifying and resolving database fragmentation by setting object storage parameters, following good code practices, moving segments out from the fragmented tablespace, defragment the tablespace and move the segments back into the tablespace.
  • Configured the Optimizer Mode for the database.
  • Tuned the Optimizer parameters for the database.
  • Balanced the load on the database by reorganizing the hot segments into separate tablespaces.
  • Space Management.
  • Capacity Management.
  • Periodical Data archiving and purging.
  • Implemented Login Trigger on production systems.
  • Tuned *Work Areas by moving manual to automatic PGA management by configuring PGA AGGREGATE TARGET and WORK AREA SIZE policy.
  • Identified the objects that are making small table FTS, pinned them in KEEP pool and configured KEEP cache.
  • Identified the object that are making large table FTS and pinned them in RECYCLE pool.
  • Identified the large tables, which were not partitioned and implemented PARTITIONING.

Database Engineer (Oracle DBA)

Confidential

Responsibilities:

  • Setup, installation, configuration of Oracle 8i/9i/10G databases on HP/Sun and Linux environment.
  • Administered more than 600 production databases - Oracle, MYSQL,SQL SERVER, with 7/24 support, as a part of operations support
  • As a part of operational support, closely worked with System Administrators, Network Administrators and Storage Administrators.
  • Backup and recovery of databases with RMAN .
  • Implemented backup and recovery procedures and standards for the data in excess of 70 TB in capacity.
  • Conducting COA (Client Operational Acceptance) checks. Analyzing the physical designs using Erwin data modelling tool. Builds and implements test, quality assurance, and production databases and environments.
  • Extensive utilization of RMAN for backup and recovery.
  • Plans and coordinates backup and recovery strategies to restore database operations after failures.
  • Partitioned large tables with RANGE, HASH, LIST and composite partition methods for several data mart schemas.
  • Resource of application team in PL/SQL coding and query optimization.
  • Extensive experience with performance tuning at systems and application level.
  • Creation, monitoring and administration of 8i/9i/10g DATAGUARD.
  • Monitoring of databases on SHAREPLEX, STREAMS, and AQ.
  • Executes strategies for database migration and changes; Coordinates strategies to move data between databases.
  • Plans, coordinates, and executes strategies to optimize database performance.
  • Monitors database space requirements and adjusts for future needs.
  • Assists in the planning and installation of database management system upgrades
  • Supporting the databases with Applications - Oracle e-Business Suite, PeopleSoft Enterprise, Siebel, Ariba,etc.

Environment: Oracle 8i/9i/10g databases, 9i/10g DataGuard, 9i/10g RAC, 10g Datapump, Export/Import, Physical Backups, MySQL, SQL Server 2005 Clusters, HP 700 Series, Sun 3500,3800,6800, Sun Enterprise 450 & 880, Veritas Clusters, Solaris 2.6 to 9.0, Red Hat Enterprise Linux 3.0, 4.0 Windows 2000,Windows XP,TCP/IP, HTTP, LDAP, NetBEUI Protocols, Netcool, Erwin, Shell and perl scripting, OEM, Orbit/Oasis, DSView, F-Secure SSH, F-Secure FTP.

Confidential

Environment: Oracle 9i/10g Databases, 9i/10g DataGuard, Sun Fire V1280,Sun Fire V480, HP Blade Servers (BL e-class),Veritas Clusters, Red Hat Enterprise Linux 3.0, 4.0, Windows NT, Windows 9x, Windows 2000,Windows XP,SQL Server 6.5,7.0,OEM,Erwin Tool. TCP/IP, NetBEUI Protocols,RMAN,OEM

Oracle DBA

Responsibilities:

  • Administered more than 80 databases on Oracle 8i, Oracle 9i and Oracle 10g by 7/24 schedule, for a large online transaction management Bank.
  • Installation and administration of Oracle Databases.
  • Database migration from low-end hardware to high-end hardware.
  • Migration of several databases from Oracle 8i to Oracle 9.2.0.5.0 and Oracle 10g environment.
  • Performed 7/24 online production support, for databases over 3 Terabytes in capacity,
  • Logical, physical design, Data modeling using ER diagrams and Erwin tool.
  • Implementation of partitioning, parallel query, bit-mapped index, Updatable materialized view options of Oracle 9i release
  • Performance tuning and Optimization.
  • Import and Export of Data (Logical).
  • Implemented backup and recovery procedures with RMAN.
  • Verifying backups periodically on test server and same is sending to offsite for validity.
  • Managing Rollback Segments and Temporary segments.
  • Oracle troubleshooting.
  • Setup, configuration and administration of 9i DataGuard for disaster recovery and offloading backup operation.
  • Experience in Managing Oracle with Fail over and Switch over options
  • Analysis of table’s w.r.t transactional nature and setting up storage parameters.
  • Oracle Database cloning.
  • Reorganizing the database periodically.
  • Documentation of the data flow and system design.
  • Data synchronization between pay roll and accounting departments with Oracle’s SNAPSHOPTS on daily basis.
  • Providing guidance to the developers in writing and tuning PL/SQL stored procedures.
  • Tuned, Configured Kernel and Database parameters for optimization of DBs and SGA
  • Built shell and SQL scripts to capture performance metrics and trouble shooting time by time via trace files (tkprof) and data files (dbverif)
  • Examining various dynamic tables like V$sysstat, V$sesstat, V$waitstat, V$rollstat,V$lock,V$locked object,V$sqlstats,v$sqlarea to reduce contention and monitoring locks, latches and waits
  • Using Analyze and dbms stats for gathering statistics for different objects of database
  • Work closely with the Systems Administrators as well as the applications development team to design, implement and test new features and functionality
  • Allocation / Deallocation of extents to tables, indexes and other objects
  • Recommnedations for managing data growth rates and Capacity Planning through allocation of default storage and extent management parameters for different objects according to storage and performance issues
  • Built security via user’s roles & privileges. Secured system and objects via object roles & privileges and manage users through user’s profiles for CPU and database resources
  • Did rollback segment monitoring and sizing for data loads, OLTP and backup issues
  • Distributed data files, partitioning to increase I/O performance, implementing OFA.
  • Design and review of logical, physical data models with Erwin data modeling tool.
  • Review, approve, apply and test patches, changes and/or modifications to Oracle relational database schemas.
  • Resource of application team in PL/SQL coding and query optimization.
  • Built customized backups and recovery scripts and scheduled for test as well as production DB as per the requirement basis.
  • Extensive experience with performance tuning at systems and application level.
  • Did disaster Recovery with RMAN. Built Target and Catalog databases
  • Data Loading from Flat Files, control Files using Oracle SQL * Loader in different scenarios

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