VMware Migration Readiness (Google Sheets Tool) vs. Agentless Dependency Mapping Tools

Stage-0 baseline (vCenter + backup CSVs, local) and Stage-1 mapping: how they fit together.

TL;DR

  • Purpose: Stage-0 = fast, local readiness baseline; agentless dependency mapping = deep application flow maps for grouping and wave planning.

  • Inputs: Stage-0 uses vCenter + backup CSVs; mapping tools inspect live network/process flows (typically without agents).

  • Outputs: Stage-0 delivers per-VM readiness with reasons + exec rollups; mapping tools deliver dependency maps, move-set grouping, and inputs to timelines/cutovers.

Looking for the main VMware Migration Readiness (Google Sheets Tool) page where you can download the tool? Click here.

What each does

Stage-0 Readiness Baseline (this tool)

  • Inputs: vCenter inventory CSV + backup job inventory CSV.

  • Runs locally: Google Sheets (and an Excel version) — no agents, no SaaS ingest.

  • Normalization: deduped VM names, OS family, any-tag production/critical/compliance, uptime class.

  • Backup posture: missing/stale backups, short retention, irregular frequency, no offsite.

  • Output: Per-VM readiness with reasons (only causes that apply) and exec-ready rollups by Cluster / OS family / Uptime / Backup posture.

  • Why first: minutes-to-signal once set up; vendor-neutral triage (move-sooner vs stabilize/leave-for-now) before heavier tools.

Agentless dependency mapping tools (class)

  • Goal: discover live application dependencies across VMs/hosts (who talks to whom, ports/protocols, volumes).

  • How: observe network/process flows (typically via collectors/appliances or integrations) without installing agents on each VM.

  • Output: Dependency maps, tier grouping, suggested move sets, evidence for change control and wave sequencing.

  • Why later: requires access, scoping, and time; best applied to cohorts you’ve already shortlisted.

When to use each

  • Use Stage-0 when you need a triage baseline in hours to brief stakeholders and scope vendor conversations — with no infrastructure changes.

  • Use agentless mapping when you’re ready to validate dependencies, group move sets, and build wave plans/timelines with confidence.

How they work together (handoff 1-2-3)

  1. Stage-0 shortlist: Identify move-sooner cohorts and stabilize/leave-for-now systems using readiness + reasons.

  2. Targeted mapping: Apply agentless dependency mapping to the shortlisted cohorts to confirm flows, uncover hidden ties, and form move sets.

  3. Planning: Use mapping outputs to finalize waves, timelines, and change windows; carry Stage-0 artifacts forward to avoid re-work.

What carries forward from Stage-0 (not throwaway)

  1. Deduped VM inventory with normalized names and OS family.

  2. Any-tag normalization for production / critical (DB/AD/DNS) / compliance.

  3. Backup posture flags (missing/stale/retention/offsite).

  4. Uptime class for change-averse candidates.

  5. Cohort shortlist by cluster/OS/role for targeted mapping.

  6. Assumptions register (thresholds) and a readiness rules table (audit trail).

  7. Optional CSV bundle (inventory + flags + cohorts) ready to hand to Stage-1 tools.

Can we continue guiding beyond Stage-0?

Yes. If deeper assessment is warranted, we’ll help scope the right next step, ensure Stage-0 artifacts are reused by mapping/capacity/cost workflows, and keep assumptions consistent across phases. Vendor-neutral.

What this page is not

A vendor review or endorsement. “Agentless dependency mapping tools” refers to a class of solutions that inspect live flows to derive application dependency graphs.

FAQ

Stage-0 vs. agentless dependency mapping tools

  • No. Stage-0 prepares it by cleaning data, flagging risks, and shortlisting cohorts so mapping time is focused.

  • No. The deduped inventory, flags, and cohorts from Stage-0 become inputs to mapping and wave planning.

  • Lower friction and faster signal for executives; you avoid scoping/mapping the entire estate and focus on the right systems first.

Legal note

All product names are trademarks of their respective owners. This page describes how a Stage-0 baseline complements a class of tools; it is not an evaluation of any specific vendor.