1. Winslow Chang
19 Bay 7th
Street, Brooklyn NY 11228 – 917.838.1417/917.922.5698 - winslow.chang@gmail.com
SUMMARY: Experienced in configuring, optimizing and administering all features of Oracle databases
including logical and physical database design and migration, performance tuning, capacity planning, back-
up/recovery and data redundancy. Proven to enhance systems, resulting in increased efficiency, reduced support
costs and enhancement of overall data quality. Team player in supporting the B&N Ecommerce Web sites and
Retail stores across the country.
SKILLS
 Database Design, Development and
Administration
 Database Install, Configuration, Upgrade and
maintenance on HPUX/AIX/Linux
 Installed and configured Databases using ASM
 Database Security implementation and
maintenance
 Space management policies, Data backup and
restore/compression
 Project management and reporting
TECHNOLOGIES
 Oracle RDBMS v 9i-12c
 Oracle RAC and Oracle Clusterware
 Oracle Streams
 Oracle RMAN
 Oracle Cloud Control 12c
 Oracle Transparent Gateway
 Knowledge of GoldenGate/DataGuard
 Tivoli Storage Manager/Avamar
 OS Linux Red Hat 6.4, HP-UX 11.31, AIX 5.7
EXPERIENCE
2001 – Present Barnes & Noble Retailer of content, digital media and educational products
Senior Database Administrator
 Support of OLTP/Data Warehouse multi-terabyte environments for all B&N Ecommerce and Retail
Oracle systems (Store, Merchandising, Peoplesoft, Oracle Financials).
Supports 5 node ATG Ecommerce RAC system, Oracle Streams replication for Title content, 9TB
Merchandising systems for inventory, replenishment and purchase orders.
 Proven track record leading configuration, troubleshooting and maintaining Enterprise wide RMAN
backup to different types of Storage management software (TSM, Avamar, disk);
 Able to lead whole team in performance tuning issues (partitioning, optimizing tables, indexes,
database performance analysis (SGA/PGA), SQL query optimization, storage performance, CPU and
memory Tuning).
 Expert in Oracle Enterprise Manager installations, upgrades and configuration. Supervised and
transferred knowledge of agent installations to Retail and Ecommerce DBA groups.
 Propelled Human Resource group to next level of support by upgrading PeopleSoft payroll systems to
HRMS 8.3 on Oracle 9iR2/HPUX11. Extensive performance tuning of upgrade scripts using hints,
views, database design reorganization and indexes. Oracle client installs across HR department.
 Slashing company maintenance costs by converting 3PAR SAN disks to Xtreme I/O for saving space.
Migrated Storage management Tivoli Storage Management to RMAN disk backups to Avamar
backups. Reorganization of data and index segments online and advanced compression.
 Diagnosed problems using tools such as OEM, SQLProfiler, AWR/ADDR, SQLtrace and explain
plan
 Upgraded Grid to Cloud Control 12.1.0.5 with agent installs. Supported multiple oracle RDBMS
upgrades from 8i to 11G for Store replenishment systems. Installed/upgraded 11G transparent
gateway on B&N Ecom RAC ATG and Merchandising servers
 Monitored trends in disk space utilization, memory usage, and availability on critical database
servers.
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2.  Managed database maintenance plans and design and implement backup and disaster recovery plans.
 Created quarterly automated processes to comply with SOX audit report requirements.
 Increased group efficiency using automation of tasks (interval partitioning, dynamic analyzing, alert
log rotations, fragmentation report, space monitoring, deadlock reporting).
 Cut costs by converting legacy informix store systems to Oracle 9i using Migration Workbench, SQL
loader, and ksh.
 Supported multiple development, QA environments. Worked closely with application, system
administration, storage and network teams to deliver outstanding systems.
 Tested/implemented various backup software(SQLBacktrack,BMC Patrol, ManageIT)
1997 – 2001 HSBC Bank US Banking and financial services organization
Database Administrator
 Installed Oracle 8i Enterprise & Net 8 on Sparc4500 running Solaris 2.7. Installed Oracle 8i clients
for Dotcom and E-commerce groups.
 Monitored replication between primary and standby. Created databases, accounts, roles. Enforced
security of user profiles, Monitored database growth using OEM. Responsible for backups of
production database to history database using imp/exp utility. Assisted in performance tuning by
analyzing extent sizes, database fragmentation, and physical/logical reads. Resolved space issues by
analyzing fragmentation and resizing key tables. Upgraded test server to 8.0.5 from 7.3.3.
 Informix 7.3.1 DBA for Derivatives group (MAS) on UltraSparc 250. Monitored HA replication processing
between primary and secondary servers. Responsible for creating accounts, tables, views, administering
privileges adding chunks and forecasting future space requirements for all databases (prod, beta).
 Monitored Sybase 11 databases performance/contentions running on Solaris 2.6 using DB Artisan.
1997 – 1997 Republic National Bank Banking and financial services organization
Sr Programmer/Analyst
.
 Created securities trade feed for EOD positions for analysis by RISK group. It contains cusip, coupon
rate, maturity date, closing settlement & net position of equities and bonds for a range of accounts.
 Modified all Pro-C/C EOD applications and Prime Broker System to be Y2K compliant (Margin
Interest, Short Rebate, manager/customer reports).
1996 – 1997 Telesphere Corp Market data provider (now Bridge Information Systems)
Programmer/Analyst
1992 – 1996 RAM Mobile Data Operator of Mobitex network (now BellSouth wireless)
Programmer/Analyst
EDUCATION:
City College of New York, School of Engineering New York, N.Y.
B.S. Computer Science, May 1992
Oracle Education
PeopleSoft Performance Tuning, PL/SQL, Database Administration, Backup and
Recovery, Network Administration Oracle Performance & Tuning
Oracle GoldenGate 12c Hands on Workshop
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