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M G Riaz Ahamed
Senior AIX/Unix Infrastructure Engineer specializing in IBM Power and enterprise migrations
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About
AIX/Solaris and IBM Power specialist who has led real-time performance recoveries for core banking/ERP workloads—diagnosing CPU/IO contention down to FC queue depth and LPAR sizing, restoring latency from 5s to 200ms. Experienced with POWER7/8/9 operations across HMC/VIOS/NPIV and live DLPAR resizing, plus legacy Solaris SPARC to RHEL x86 hybrid re-platform migrations with post-cutover Oracle performance considerations.
Experience
Education
Key Strengths
- Led high-severity AIX production incident triage and tuning; reduced I/O wait from 40% to 4% and restored app latency from 5s to 200ms
- Deep AIX performance diagnostics using topas/vmstat/iostat/nmon to isolate CPU vs I/O vs memory constraints
- Storage/FC tuning expertise (HBA queue depth/num_cmd_elems) and SAN latency interpretation (avgserv thresholds)
- IBM Power virtualization operations (HMC/VIOS/LPAR/DLPAR) including live CPU/RAM resizing without downtime
- Hybrid migration planning for legacy Solaris SPARC to RHEL x86, including dependency discovery and endian-architecture considerations
- HA/provisioning operational knowledge with NIM and PowerHA/CAA command-line tooling
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