IT · Telecom · Corporate Infrastructure

Pavel Tenitskiy

And this is my personal blog

19+ years in IT, telecom and corporate infrastructure — architecture, support and migrations at enterprise scale.

Open to projects
Pavel Tenitskiy
19+
years in IT
8
years in telecom
100+
projects delivered
45
server racks, solo
About

A bit about me

19+ years in IT, telecom and corporate infrastructure — 8 of them in pure telecom. Along the way: 50+ software implementation, support and migration projects, and 50+ projects architecting hardware around clients' solutions — owning enterprise architecture at, frankly, babysitter level, across dozens of vendors.

At peak: single-handed support for 45 server racks at once — 450 servers, 25 storage arrays, 20 switch pairs at a telecom operator. Support spanning both IBM Power and Oracle Exadata. Priority stack for the last five years: Lenovo + Nutanix, including solutions on Lenovo ThinkSystem and ThinkAgile. A certified Lenovo service engineer and a repeatedly-certified Nutanix specialist (NCP-MCI, NCP-US, NCP-DB, NCP-CN).

From the first Xeons and direct-attached LSI onward — hands-on support for gear from:

RadisysZiconUlticomEMCCiscoJuniperRadwareIntelOracleQLogicIBMSunAvayaDellHPE
Now

What I do now

Hyperconvergence & multi-cloud

Designing and operating Nutanix.

Virtualization

VMware, OpenShift Virtualization and SUSE Virtualization.

Data protection & DR

Backup architecture on Commvault.

Storage

Hyperconverged storage; Lenovo / NetApp / Pure storage systems; Brocade FC SAN fabrics.

Kubernetes & databases

Infrastructure design for Kubernetes; database management on Nutanix.

Networking

Fortinet / Check Point, Juniper, Cisco, Arista — plus NVIDIA and Edgecore architecture.

Design & optimization

End-to-end solution design, weak-point analysis of existing infrastructure, rebuilds, migrations and budget optimization.

Certifications

Verified credentials

All certifications Verify on Credly Nutanix · Commvault · Lenovo · Object First · Broadcom · Quantum · Arista
Publications

Data infrastructure

Write-ups from practice: what really drives the budget and timeline of an infrastructure project, where the arithmetic parts ways with reality, and what to ask before a specification is signed. Every issue ends with a checklist.

Issue 01

Hardware for big data

Where an array fits, where local disks do, and where not to virtualise at all — the three forks that set the budget of a data platform.

July 2026 · 10 min read Read the issue →
Issue 02

A tape library for people who never designed one

How the tape tier actually works, what breaks in it, and why LTO-10 changes the capacity arithmetic.

July 2026 · 11 min read Read the issue →
Issue 03

Backup: we are counting the wrong thing

Capacity, retention, backup window — and not a word about time to restore service. Where backup sizing parts ways with reality.

August 2026 · 14 min read Read the issue →
Issue 04

Two relocations, two strategies

A database complex between two halls and a two-rack office in a single week: why the plan never hinged on the rigging.

August 2026 · 9 min read Read the issue →
Issue 05

Three substitutions

How a licensing perimeter differs from storage capacity, and why the quoted reduction ratio dies on encrypted data.

August 2026 · 12 min read Read the issue →
Issue 06

The four ages

How much support to buy up front, why keep spares under an active contract, and when hardware stops deserving trust.

August 2026 · 15 min read Read the issue →
Issue 07

Four environments

Rent versus own across four environments at once: distance between sites, the price of memory, link arithmetic, and two boundaries for accelerators.

September 2026 · 18 min read Read the issue →
Issue 08

Line items and cores

The budget for an application system has four lines and the customer sees one. A sizing argument that nearly quadrupled the subscription, and the measurement that settled it.

September 2026 · 14 min read Read the issue →
Issue 09

The fork after vSphere

Five replacement options, and what happens to storage and networking once “ESXi plus an array over Fibre Channel” drops out of the design.

September 2026 · 17 min read Read the issue →
Issue 10

The rack runs out first

Infrastructure is bought in cores and installed in kilowatts. The arithmetic of phases and feeds, and an estate where 71% of the bill is paid just for being on.

October 2026 · 16 min read Read the issue →
Issue 11

In layers

What is actually in the racks: three node generations, a fifth of the power going to switches, and a temperature case where the obvious explanation proved wrong.

October 2026 · 17 min read Read the issue →
Issue 12

Debt and default

Requirements grow faster than hardware depreciates. Five states of infrastructure debt, and the moment when there is nothing left to choose between.

October 2026 · 18 min read Read the issue →
Issue 13

Autosave mode=ON

The data-protection ladder from a cloned VM to a copy in a local cloud: what each rung covers and which of it the platform licence includes.

October 2026 · 16 min read Read the issue →
Issue 14

The second floor

Where Kubernetes moves when you leave vSphere: five combinations of virtualisation and container platform, and the automation that survives the change.

October 2026 · 13 min read Read the issue →
Issue 15

Somebody else’s building

Cloud, colocation, rental and your own data centre: who covers which level of risk, what stays with you regardless, and why losing one building falls out of the registers.

October 2026 · 18 min read Read the issue →
Issue 16

A parallel world on vSphere

The world that is not going anywhere: VMware on subscription, a Fibre Channel fabric, tape, and a current-generation AI cluster in the same procurement queue.

October 2026 · 16 min read Read the issue →
Contact

Get in touch

Got an infrastructure project, a proof-of-concept, or a design review? Reach out on LinkedIn or by email.