Management Oracle
Resume:
Krishna Tammina
*******.***@*****.***
Professional Summary:
. Over Six years of IT industry experience as a Senior Middleware
Administrator.
. Highly Experienced in Administration, Maintenance, Troubleshooting,
Optimization and support of critical e-Commerce Applications using
WebLogic Application Server v9.0/v10.0/v10.3 and IBM WebSphere
Application server v6.0/v6.1.
. Involved in maintaining application servers on various platforms like
AIX, Linux, Solaris and Windows platforms.
. Installed and configured various web servers like Apache Server 2.2,
IIS and SunOne Webserver v6.0.
. Developed solutions for automating Environment build, maintenance,
standard checks for troubleshooting and communication of updates to
Shareholders.
. Expert in configuring Web Sphere resources like JDBC providers, JDBC
data sources for Oracle 10g/9i and IBM DB2 v9 libraries, plug-in,
virtual host, variables and JVM parameters and Oracle databases.
. Proficient in Shell scripting (bash, ksh) including Jython, ANT,
Python, Weblogic Scripting Tool (WLST) to automate administration
activities.
. Extensively worked on CVS & SVN version control tools.
. Assisted clients on certificate related tasks and configured
applications with high security.
. Worked on monitoring tools like Introscope, Nagios, BMC patrol in
troubleshooting and proactively working on issues thus avoiding
outages.
. Configured IBM WebSphere Application Server to use LDAP server for
authentication.
. Experienced in validation of LDAP connections and enabling LDAP
Security using cmd line and config wizard with no-SSL and over SSL for
Single and Multiple realms.
. Experienced in configuring SSL for web servers, requesting and
installing secure certificates, enabling global security using LDAP
registry and single sign on.
. Performance Tuning of Oracle Weblogic environments.
. Strong experience in migrating Weblogic applications from 9.0 to
higher and installing refresh packs, fix packs to upgrade the Weblogic
application server versions on Solaris operating systems.
. Involved in creating and configuring the horizontal-vertical
clustering, Workload Management (WLM) and Session persistence.
. Worked and Configured F5 BIG IP Load Balancer v9/v10.
. Involved in Recovering and Backup procedures.
. Experienced in 24X7 on-call production support and troubleshooting
critical applications.
. Highly motivated and conceptually strong individual with exceptional
analytical and administration skills.
. Strong Knowledge on Internet Protocols.
. Ability to communicate effectively with all levels of management and
the client community.
Education:
. Bachelors in Electronics & Communication Engineering, INDIA.
Work Experience:
Client : COMCAST Corporation, Herndon, VA
Job Title : System Analyst
Duration : June-2012 to Present.
. Installed, configured, implemented and supported multiple domains of
Weblogic Application Server 10.3.6.
. Configured Clusters, data sources, LDAP, JMS to support application
architecture.
. Installed and configured apache 2.2 to load balance and secure
requests to weblogic domains.
. Coordinated production outages and facilitated resolution by working
with several teams like UNIX, Network, Database, Infrastructure and
Development teams.
. Scripted manual deployments to various domains, sync script to
replicate any changes on active nodes to passive nodes and script to
update security to restrict the access of individual APIs to
specified clients.
. Involved actively in troubleshooting the JVM crashes by analyzing the
core dumps, other diagnostic artifacts and also worked closely with
Sun Engineers to trouble shoot JVM issues
. Extensively used Wily Introscope, Nagios, Splunk, BAC for monitoring
critical applications and fine tuning environments.
. Worked on Splunk Dashboard setup for various environments and resolved
all the issues encountered.
. Used tools like JRockit Mission Control [JRMC] to analyze JVM behavior
by enabling JMX.
. Created and Supported cron jobs for timely running of jobs and
automated scripts.
. Involved in configuring the security plug-in for weblogic in Apache.
. Maintain and support critical SQL jobs which hold critical data
client commissions.
. Used UC4 automation tool extensively in running scheduled jobs.
. Setup alerts to gather statistics from UC4 and analyze them to
understand application behavior.
. Hands-on experience with Concept Wave[CW] in using designer and
config components.
. Worked with different teams (development, production, clients, project
management) in order to facilitate and improve application uptime and
delivery.
. Planned, organized and implemented Morning Reports where production
environments are audited daily to proactively work on issues before
clients faces them.
. Regularly interacted with testing team to collect their requirements
and inputs to provide better support.
. Worked in Automation in building environments which reduces build time
to less than an hour.
Environment: Weblogic Server v10.3.6, Linux 2.6.16, Oracle 10G, F5 Big IP
Load Balancer, Wily, Splunk, Nagios, Apache 2.2.
Client : Lab Corp, NC.
Job Title : Senior Middleware Administrator
Duration : June-2009 to June 2012.
. Extensively worked on administration of Oracle WebLogic 10.0
MP1/10.3.x Application Server.
. Installed and configured multiple domains and completely created a new
Development environment.
. Installed, configured and administered and integrated Apache Web
Server with the WebLogic Application Server.
. Worked in the migration of applications from Oracle 9.2.2 to Weblogic
10.3.5.
. Automated most of tasks to build new environments, make an
configuration changes and proactively send emails to corresponding
team before issue is reported.
. Significantly minimized escalations to upper management about critical
issues after joining as Senior Middleware Engineer
. Documented all critical concepts and updated sharepoint for team to
have access while working on them.
. Administered application servers of Weblogic and LAB Corp home grown
middleware platforms.
. Working with infrastructure team to deliver environments for each
project release on time.
. Performed multiple deployments during upgrade of WebLogic Server from
8.1 to 10.3 in Web Center Environment.
. Deployed J2EE archives WAR's, EAR's, TAR's on weblogic server.
. Troubleshooting and fixing the issues occurred during the deployment
of Java applications and EJB components.
. Performed multiple and consistent deployments during upgrade of
WebLogic Server from 8.1 to 10.3 in Web Center Environment
. Configured Web Server plug-ins for Application Servers WebLogic and
WebSphere.
. Work on Web Security tools- LDAP Server, SSL Certificates and client
authentication.
. JMS Configurations- JMS Server, Connection Factory, Foreign JMS
server, Message Bridge, Topic/Queue, Distributed destinations
. Installed, Configured and resolved issues on apache, iplanet
webservers.
. Addressed business critical issues by using Introscope, BMC patrol,
Nagios tools effectively.
. Setup script for servers monitoring to check for pending queues and
increased message count. This helped to receive alerts when thresholds
are crossed.
. Conducted knowledge transfer and training sessions to new team members
and closely assisted them in getting up to pace with regular team
activities.
. Worked extensively on Introscope setup across all environments.
Primary focus has been on knowledge sharing which was needed for all
releases.
. Monitored regularly on Introscope to make sure Performance setup is
matching production.
. Setup sudo scripts on all performance environments which helped in
tracking unauthorized users accessing our environments.
. Worked extensively on CVS, SVN for better management of configuration
files for Change Management.
. Automated development and testing teams requirements so they can check
needed information without any manual work involved.
Client : Security Finances, Spartanburg, SC
Job Title : Weblogic Administrator.
Duration : Jan-2008 to June-2009.
. Installation, Configuring, Tuning and Administration of Weblogic v10.3
on Solaris 10.0.
. Building new Weblogic Environments on Solaris Machines to ensure
successful delivery of all Java based applications by providing
expertise around all Java and J2EE infrastructure and applications.
. Expertise in installing Weblogic Patches on Weblogic Environment using
Oracle Smart Updates.
. Expertise in Administering Weblogic Environment using Scripts.
. Used Weblogic Scripting Tool, ANT and Jython Scripting to create
scripts for Administration.
. Successfully created scripts which would Create Entire Domain with
required number of Managed Servers, Clusters, Machines, JMS Servers,
JMS Modules.
. Created Scripts to Administer Weblogic Application Servers.
(Start/Stop Clusters, Deploy/Undeploy Java Applications, Start/Stop
Servers on Particular Machine, and Changing JVM Arguments of Managed
Servers, etc).
. Generated Reports on Deployed Java Applications Status like the
Version, Health and Targets.
. Expertise in running scripts using Cronjobs which would give the
Status of all the Weblogic Application Servers in a Domain and sent an
e-mail's Report using UNIX commands.
. Configured Sun One Directory Server v6.3.
. Configured Data sources for Oracle 10G Database and Security Realms
for LDAP using the configuration details of Sun One Directory Server.
. Managing and Monitoring the JVM performance by Weblogic Heap Size,
garbage collection, JDBC Pools.
. Expertise in configuring F5 Big IP Load balancer to provide load
balancing to the environment.
. Configured BIG IP pools, Network VIP's, nodes.
. Expertise in Born Shell Scripting Language.
. Generated Shell Scripts for administering Solaris Machines like
Deleting Old files to save Disk Space, Automated scripts while
startup.
. Installed and Configured Adobe LiveCycle Enterprise Suite v8.2.
. Created Oracle Service Requests to report issues with Weblogic
Application Server.
. Involved in Root Cause Analysis to troubleshoot various issues in
Production Environment.
. Work with developers and help troubleshoot and fine tune applications
in development, QA, and Production environments
. Involved in assisting QA team in Load and Integration testing of J2EE
applications on Weblogic Application Server.
Environment: Weblogic Server v10.3, Sun Solaris 10.0, SunOne Ldap Server
v6.3, Oracle 10G, F5 Big IP Load Balancer v10, Adobe LiveCycle v8.2,
TCP/IP, DNS, JDBC, XML, Apache.
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