SUMMARY:

• Overall 11 years of experience in administering and troubleshooting Servers as well as Network related issues.
• More than 10 years of experience on Unix/Linux Servers Platform, LAN and WAN network environment.
• More than 4 years of experience in Web Hosting Industries which Includes Dedicated hosting, Cloud Computing Environment & 5 years of experience HPC Cluster Environment.

TECHNICAL SKILLS:

Technical Key Skills: Installing and Configuring Bind DNS, DjbDns, DHCP, NIS, NFS, Squid, Samba, MAIL with Postfix, Qmail, and Sendmail, Vsftpd, Proftpd, ProxyFTP, PopTop, OPENVPN, APACHE, LIGHTHTTPD, NGINX, PHP, MYSQL, TOMCAT, LOAD BALANCING, Heartbeat, Corosync, Pacemaker, GIT, Jenkins, VPOPMAIL, COURIER - IMAP, SQUIRRELMAIL, SQWEBMAIL, MAIL-SCANNER, SPAMASSASSIN, CLAM-ANTIVIRUS, NAGIOS, BIG BROTHER, GANGALIA, COLLECTL, MRTG, CACTI, MUNIN, TWIKI, AWSTATS, WEBALIZER, CPanel/WHM, on Linux and Unix. Bash, Python, Ruby, and Perl scripting. Puppet & Chef provisioning. Tcpdump and Wireshark analysis. Hardware RAID, Software RAID and LVM. Parallel file systems like GlusterFS, Lustre, IBM Spectrum Scale (formerly GPFS), GFS2, and OCFS2. High Performance Computing HPC & Cloud Computing. Benchmarking using IOR, Iozone and mpirun. AWS, Docker, Citrix Xen and KVM Hypervisor.

Operating System: FreeBSD 4.x, 5.x, 6.x, 7.x, 8.x Centos 7.x, 6.x, 5.x, RHEL 6, Debian, ubuntu, Gentoo, Sun Solaris 8, Red hat Linux 7.1,7.2,8, Fedora core, Windows 2008, Windows 2003, Windows 2000, Windows XP Home & Pro, Windows NT 4.0, Windows (95, 98, ME), and DOS

Server Platform: Dell PowerEdge R610, Dell PowerEdge R710, HP DL380 gen8 servers, Dell PowerEdge 2950, Dell PowerEdge 1950, Dell PowerEdge 1850, Dell PowerEdge 1435, Dell PowerEdge 1425, Dell Blade Servers M610e, M915 with M1000e, SuperMicro, Blade Server RLX 24 blades, SUN Ultra 5/10, Sparc Station (10, 5) and IBM x200 series server

Devices: Mellanox Switch and HCA, Cisco Router 2800, 6500 series, Cisco 2960, 2950, 3550 Switches, Brocade Switches, SCSI Devices, LSI Raid, 3ware, DDN SFA12K, SFA10K & S2A storage controller and BIG IP F5 Product.

WORK EXPERIENCE:

Confidential, Chatsworth, CA

Level 2 File System Support Engineer

Responsibilities:

• Architect and Design HPC Solutions based on the Customers Specs requirement.
• Performance Tweak & Benchmark of Lustre and GPFS File system to meet Acceptance tests.
• Troubleshooting Infiniband Network QDR, FDR, EDR, Fiber Channel and 10G, 40G Ethernet network and 40G, 56G and 100G IB Network. Intel Omni - Path network troubleshooting.
• Provide Support for High Performance Computing product based on Clustered File System.
• Support DDN Exascaler product based on Lustre file system for HPC FS with more than 5PB - 45PB of storage environment, with 1000 - 5000 compute nodes.
• Support DDN Gridscaler product based on GPFS file system for HPC with more than 45PB of storage environment and provide resolutions to the Customers for their issues.
• Responding to tickets created by customers for support and troubleshooting issues related to Lustre, GPFS, NFS, Samba, KVM Hypervisor, Ethernet Network & Infiniband network issues.
• Kernel Crash dump analysis and bug file on Lustre File System and OS related issues.
• Troubleshooting DDN SFA10K, SFA12K, SFA10KE, SFA12KE and S2A Storage Controller.
• Pushing patches to GIT Repositories and build new Lustre binary package using Jenkins.
• Modify bash and python scripts to meet with product features requirement.
• File system monitoring using Ganglia, Collectl and Nagios.
• Resource managing using Slurm and LSF with parallel IO benchmarking using IOR & mpirun.
• Test Lab setup for testing Customers test case scenarios on VM, deployment using puppet.
• Lustre High Availability using Corosync and Pacemaker.

Confidential, New York, NY

Senior Systems Administrator

Responsibilities:

• Managed over 4000+ servers containing Centos 5.x, Centos 6.x, Debian, Ubuntu, Windows 2003 and Windows 2008 Operating System.
• Responding to tickets created by customers for support and troubleshooting Systems.
• Installing and configuring Varnish Caching with Apache and Nginx.
• Improving NFS performance and tweaking ext4 file system.
• Installation of Blade Server for cloud environment based on Xen hypervisor using Chef and Kickstart deployment tools.
• Deploying Nagios with pnp4nagios, Ganglia and Munin monitoring system.
• Hardware and Software based Load Balancing.
• Mysql server upgrade and migration.
• LDAP User Management.

Confidential, Sayreville, NJ

Unix-Linux Systems Administrator

Responsibilities:

• Managed over 5000+ servers containing Centos 5.x, Fedora, FreeBSD 6.x, 7.x, and 8.x, Debian, Ubuntu, Windows 2003 and Windows 2008 Operating System.
• Installing and configuring Apache, Lightttpd, Nginx, php, MySql, Vsftpd, Postfix, Sendmail, Dovecot, Squirrelmail, Roundcubde, PhpMyAdmin, Spamassassin, ClamAV Antivirus, Squid proxy on Unix and Linux servers.
• Responding to tickets created by customers for support and troubleshooting issues related to Open Source applications and Operating Systems.
• Implementing hybrid web server configuration to speed up static file loading.
• File system tuning with ext3, ext4, reiserfs and xfs file system.
• Tweak & Tuning of Apache, Lighttpd, Nginx, Mysql, php, NFS for an optimal performance.
• Varnish with memcached caching server with multiple php-fpm.
• Migration and cloning of Linux and UNIX servers.
• Configuring Postfix as SMTP mail gateway server for relay with domainkeys and dkim validation.
• Configuring software raid0, raid1, raid10 and raid5.
• Configured and managed of Lustre File system with storage capacity of 68TB.
• Configured and tested FHGFS/BeeGFS File system with storage capacity of 128TB.
• Implementing and configuring Gluster File system with storage capacity of 32TB.
• Implementing OCFS2 file system with Drbd using ISCSI and ATAOE
• Upgrading of Lustre File System from 1.8.2 to 1.8.5 version.
• Installing and configuring Robinhood to monitor storage space utilized by each user.
• Installing and configuring Bind DNS and DJBdns with Geo location feature.
• Installing and configuring LVS load balancer, with High Availability and failover.
• Installing and configuring NTP server, NIS Master and Slave server, NFS and Samba server.
• Installing and configuring Nagios, Cacti, Ganglia, Collectl and Munin monitoring tools.
• Chroot jail set up for ftp, sftp and SSH users. Proxyftp for securing the FTP connections.
• Implementing firewall using Iptables on linux OS and ipfw on FreeBSD.
• Install and configure Open Source CMS like Wordpress, Drupal and Joomla.
• Implementing a Cloud computing Infrastructure using Citrix Xen and KVM Hypervisor.
• Implemented CloudStack, OpenStack and Eucalyptus for cloud computing test infrastructure.

Confidential, New York, NY

Unix-Linux Systems Administrator

Responsibilities:

• Administering, managing and troubleshooting around 65 servers which include Linux, UNIX and Windows Operating System.
• Backing up and Migration of Database server from Gentoo OS to Centos 5 and MySQL database version upgraded from MySQL 4.1 to MySQL 5.1v
• Rebuild and compiled a custom kernel to get multi-CPU support using SMP option and used kernel debugger option to debug the FreeBSD operating system crash.
• Implemented a script to tweak and configure FreeBSD server after fresh install.
• Configuring and Managing BIG IP F5.
• Configuring and Maintaining Apache Web Server, djbdns, Postfix mail server, Exchange 2003 server, Windows Active Directory, Awstats, MRTG, Samba, NIS and NFS Server.
• Implemented Nagios monitoring system on FreeBSD 6.2.
• Operating system Environment is FreeBSD 4.X, 5.X, 6.2, Centos 5, Gentoo, windows 2003 and windows XP Pro.
• One year Datacenter Experience at TeleHouse Datacenter New York .

Confidential

System Administrator, Network Administrator and Technical Head

Responsibilities:

• Installing and Configuring of DNS, Bind Dns, DHCP, Apache, Qmail, PHP, MYSQL, VPOPMAIL, COURIER-IMAP, SQWEBMAIL, SQUIRRELMAIL on Linux and Solaris.
• Configured Cisco Catalyst 2950T-24-port Switch and modems.
• LVM, RAID, Solstice DiskSuite, Solstice Adminsuite
• Complete planning, building and administering LAN and troubleshooting the network.
• Administered leased lines VSAT bandwidth of Bharti Broadband Networks Limited.