Dileep Mohan Email and Phone Number

• Looking after Grid computing HTC clusters hardware on a daily basis.• Monitoring systems through Nagios, mimic and other tools.• Providing first line support for HPC and storage systems.• Setting priorities and meeting critical time deadlines.• Liaising with vendors for under warranty parts replacement.• Replacing faulty components in the storage servers and batch systems (Cluster).• Configuring and testing different types of RAID arrays on storage servers and test them with latest firmware and kernels.• Dealing with Linux SysAdmin tasks such as deploying systems on the network, updating packages and firmware.• Maintaining hardware faults record and creating monthly, quarterly and yearly reports to present in the meetings.• Configuring and connecting systems through IPMI• Analyzing hardware failure stats on a weekly basis to detect any problem with specific hardware.• Providing cover for out of hours ON_Call service

Cisco UCS management tasks such as server migrations, creating new service profiles, and OS patchingWorking with Cisco for Cisco hardware issues and USC firmware upgradesServer migration involving HP hardwareDecommissioning unused serversUpgrading VMware Tools and managing VMware environments including snapshots, disk management, and CPU/Memory adjustments for Linux virtual machinesManaging VROPs (VMware vRealize Operations) environmentsUtilizing Ansible Tower for creating projects, templates, and tags, as well as performing upgrades using Ansible templatesTesting new callback releases for Ansible projectsHandling DNS records including creating, modifying DNS CNAMEs, and managing domain DNS resource recordsManaging NFS auto mountsRHEL package management through yum/rpm for installing, upgrading, and removing packagesManaging users and groupsLVM (Logical Volume Manager) management including disk, LV (Logical Volume), and VG (Volume Group) creation, extension, and data migration activities, as well as file system managementIdentifying faulty disks and coordinating with the Hardware Support Team for replacementsAdministering cron/scheduled jobs based on customer requirementsTroubleshooting server-down incidents to bring them up within the SLAIdentifying and fixing booting-related issuesHandling system auto-generated incidents and customer service ticket handlingLinux OS patch management using Red Hat Satellite server across production, UAT, and development environmentsCollaboration with vendors (Cisco/HP) after system hardware failuresServer builds for both virtual and physical servers using UCSPlanning, scheduling, and implementing changesUtilizing incident monitoring tools like ServiceNow (Snow)Handling escalated and critical priority incidents and customer requests from the L2 team.

Provided 24/7 on-call support for 10,000 Red Hat servers.Worked on platforms utilizing Cisco UCS, NetApp, VMware ESXi, and RHEL.Performed systems monitoring, performance tuning, and backup and recovery.Responded to emergency calls relating to server performance, diagnosis of problems, repairing problems, or calling upon appropriate vendors to resolve the issue.Troubleshooted resource performance issues and applied possible fixes.Represented SA's on P1/P2 bridges opened by OCC and successfully provided resolution to outages/performance-related issues.Troubleshooted NFS Servers for both media and data sharing between servers and resolved any shared storage server issues.Identified resource crunches at VM/ESX level by effectively utilizing the resource monitoring tools available at the vCenter.Migrated virtual machines and configuration files and virtual disks from one ESX host/Datastore to another ESX/Datastore utilizing vMotion and SvMotion with minimal downtime.Drove cases related to hardware failures by engaging HP/TAC engineers and escalating to get DC access for HP/UCS hardware fixes within the SLA through emergency CRs/high priority incident cases.Demonstrated expertise in supporting DBAs on high-priority cases for kernel parameter changes as per the Oracle recommendations.Demonstrated expertise in supporting application teams on any form of disruptions caused due to storage or heavy CPU/memory utilization by identifying and resolving the incidents.Monitored servers via eman (Cisco in-house tool for monitoring availability of servers/applications) and ser_mon (an in-house tool that sends alerts via email/page) to stay proactive and stop any future incidents.Performed systems monitoring, upgrades, performance tuning, and backup and recovery.Responded to emergency calls relating to server performance, diagnosis of problems, repairing problems, or calling upon appropriate vendors to resolve the issue.Responsible for quality reviews and standards.

Working as linux/unix,vmware,UCS administrator

Installation, configuration, and support for Red Hat Linux Administration, including:Monitoring servers regularlyChecking the performance of the entire systemBackup managementDisk managementHardware/software related troubleshootingManaging updatesPatch management for LinuxDaily maintenance of all servers, including:Monitoring storage spaceMonitoring processesHealth monitoringBackup managementConnectivity with sitesInstallation and configuration of HCL global line servers with Linux and Windows.Managing and maintaining remote servers in HPUX and Linux platforms, including:Installing and configuring HPUX/Linux ServersPatch management/Software ManagementRemote server management using iLO and Console.