$5/TB
Athena charges per byte scanned
Bad table layout multiplies the number of bytes every query reads — so the same answer costs many times more than it should.
AWS Data Lake Cost Recovery
Your data lake is overpaying AWS by 60–90%.
Odisena finds the waste with a read-only audit, then eliminates it with verified, reversible compaction — every run evidence-logged and approval-gated.
- Query-cost reduction
- 90–99%
- Audit turnaround
- 2 weeks
- Data touched in audit
- 0 bytes
The problem
Small-file sprawl quietly multiplies every AWS bill it touches.
Athena bills per byte scanned. A poorly laid-out lake reads far more than it needs to — and millions of tiny files pile request charges on top. The waste hides in line items nobody audits.
90–99%
Typical query-cost reduction
Partitioning plus compaction and columnar layout collapses scan volume — the single largest lever on a data-lake bill.
Millions
Of small files
They silently inflate S3 GET/LIST request charges and crater query performance long before anyone notices.
Why teams trust it
Nobody lets a stranger delete files in production.
So the whole system is built to earn that yes.
Every action is reversible, verified, and logged. The safety architecture — not the savings — is what gets an enterprise data lead to sign.
-
01
Read-only audit first
The engagement starts with a read-only IAM role. We quantify waste without ever touching your data.
-
02
CTAS verification, every run
Athena CREATE TABLE AS SELECT rebuilds with row-count checks on every run — output is proven equivalent before anything is retired.
-
03
Soft-delete rollback
Files move to a recoverable trash tier, purged only after safety gates pass. Any run can be reversed.
-
04
HMAC-signed approval gates
Policy changes require a cryptographically signed approval — no silent, unauthorized mutations to your lake.
-
05
Full audit ledger
Every operation writes to a durable ledger. Point-in-time, evidence-grade accounting of what changed and why.
-
06
Monthly ROI regression
Savings are re-measured monthly against a baseline, so the return keeps proving itself instead of drifting.
Pricing
Fixed fees. Credited fully. Guaranteed to pay for itself.
Start with a read-only audit. If the numbers work — and they usually do — the audit fee is credited straight into deployment.
Start here
Flight Check
$6,500 fixed
A two-week, read-only audit that quantifies exactly what you are wasting and hands you a verified remediation plan.
- Read-only IAM role — zero data touched
- Small-file, scan-cost & request-waste inventory
- Quantified savings report with ledger-grade evidence
Guarantee
Book the Flight Check
If identified annualized savings don’t exceed 4× the fee, the audit is free.
Recovery Deployment
$24,000 fixed
The compaction framework deployed into your account, running verified and reversible from day one.
- Audit fee credited in full
- Framework deployed in your AWS account
- 90 days of monitored operation
- Handover runbook
Ongoing Guard
$1,500 /month
Keep the savings locked in as your data and query patterns evolve.
- Monthly ROI regression runs
- Tier-policy reviews
- Drift alerts
How it works
Five steps from first call to verified savings.
- 1
Discovery call
Twenty minutes on your Cost Explorer to confirm real waste.
- 2
Read-only audit
We inventory hotspots through a read-only role — no data touched.
- 3
Savings report
A quantified, evidence-logged plan of exactly what to fix.
- 4
Approval-gated deployment
The framework goes live behind signed approval gates.
- 5
Verified savings
Row-count-checked, ledger-proven, re-measured monthly.
About
Built by the engineer who built the framework.
Odisena is the work of Ian Dansereau, a systems engineer specializing in serverless AWS cost-control architecture — Step Functions, Athena CTAS, Lambda, and DynamoDB ledgers. The compaction framework behind Cost Recovery is already built, regression-tested, and designed for production lakes where reversibility and evidence are non-negotiable.
Odisena · Cambridge, MA