Each entry explains the waste, the billing model behind it, how to detect it and how to fix it.
92 inefficiencies
Azure Managed DisksCER-0338
Azure Managed Disk reservations allow organizations to pre-purchase Premium SSD capacity at a discounted rate by committing to a one-year term. However, these reservations operate on a strict use-it-or-lose-it basis - if reserved disk...
GCP GCSCER-0336
Google Cloud Storage exposes a flat namespace through an HTTP API, but many workloads consume it through filesystem-style abstractions - FUSE mounts, Hadoop/Spark connectors, or analytic engines that enumerate prefixes to discover state....
Azure Blob StorageCER-0335
Azure Blob Storage and ADLS Gen2 bill per transaction - every list, read, write, rename, and metadata operation is a separately metered API call. When organizations migrate workloads from on-premises Hadoop/HDFS environments or local...
AWS S3CER-0334
Amazon S3 bills for nearly every API request - LIST, HEAD, GET, PUT, COPY, and POST - independently of storage charges (DELETE and CANCEL requests are free). Workloads originally designed for locally-provisioned storage, where listing a...
Amazon FSxCER-0328
Amazon FSx file systems are designed for performance-sensitive workloads such as shared enterprise file systems, high-performance computing, analytics, and machine learning. Storage costs are driven by provisioned capacity (measured in...
Azure NetApp FilesCER-0311
Azure NetApp Files bills based on provisioned capacity pool size - not on the actual data stored within volumes. This means that when a capacity pool is provisioned at a size significantly larger than the sum of volume quotas allocated...
AWS ECRCER-0308
In November 2025, AWS introduced an Archive storage class for private ECR repositories, marketed as a way to reduce storage costs for large volumes of rarely used container images. However, Archive storage pricing is identical to Standard...
AWS S3CER-0307
Organizations often use the Standard - Infrequent Access (Standard-IA) storage class based on documentation and code that predate 2021 updates to the Intelligent Tiering storage class. Intelligent Tiering became suitable as an initial S3...
AWS S3CER-0303
When external Delta tables are dropped from Databricks Unity Catalog or the legacy Hive metastore, only the table metadata is removed - the underlying data files in cloud object storage (such as S3, ADLS, or GCS) remain untouched and...
Azure Recovery Services VaultCER-0281
Backup data remains in a Recovery Services Vault after the original protected resource has been deleted. These orphaned backups continue to consume storage and generate cost despite no longer supporting an active workload. In addition,...
Azure BackupCER-0278
Backup data persists longer than intended due to misaligned or outdated retention policies. It often arises when retention requirements change over time, but older recovery points are not evaluated or cleaned up accordingly. In some cases,...
Azure BackupCER-0286
A protected resource (such as a virtual machine, database, or file share) is decommissioned without explicitly stopping backup protection. In these cases, Azure Backup keeps applying the retention policy to older recovery points, but the...
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