ceph
Ceph in Production: RBD, RGW and CephFS
A field guide to Ceph in production: which surface serves which workload, what failure domains cost in replicas, how the upgrade lifecycle really rolls back, and what key rotation does not do.
ceph
Ceph RGW Accounts in Tentacle: Plan the Identity Model
Ceph tenants and accounts solve different problems. Separate the Tentacle upgrade from account adoption, then test ownership, IAM and notifications.
object storage
Why File Count Matters as Much as File Size on Object Storage
Compression, object population and request count measure different things. Compare point-cloud packaging, range reads, update costs and cleanup with an explicit synthetic sizing example.
MinIO
MinIO Site Replication: Sync Mode Will Not Save Your RPO
A successful source PUT does not establish a recoverable peer copy. Separate MinIO site-replication acknowledgment, persisted retry state and catch-up capacity before committing to an RTO or RPO.
MinIO
MinIO on XFS: Inode Exhaustion and Prefix Design for Lots of Small Files
MinIO has no NameNode. It puts the namespace on XFS as real directories and xl.meta files. On Lots of Small Files that means you can exhaust inodes while df -h still looks fine, and a flat leaf can stall PUT, LIST, scanner, and ILM together. Here is the on-disk model, the inode math, and a prefix recipe that keeps XFS inside a regime you can operate.
MinIO
MinIO and Lots of Small Files: Why It’s Not a Database, and Why That Matters
MinIO was not built for Lots of Small Files (LOSF). No global index, no read repair, and a scanner that can take weeks to notice silent corruption. Here is what breaks, why tiering makes it worse, and when you should use a database instead.
data
Stop using MinIO as a NoSQL database: why S3 object stores collapse on small-file workloads
Two MinIO platforms, same root cause: used as a NoSQL store. Field notes on LIST IOPS, XFS directory limits, scanner & heal SLAs, the erasure-coding storage-efficiency inversion on small objects, and why Apache Cassandra (or Ceph) is the right answer on-prem in 2026.
data
MinIO Tiering Warning: Data Loss and Fault Tolerance Issues
Update, September 2026: the sibling failure hit site replication. ILM expiration on a replicated mesh created delete markers that MinIO re-probes forever: 706 million replication requests in 48 hours, 96.8 percent answered 405, no data moved. Full write-up: how 684 million HTTP 405s exposed the delete-marker replication loop. Introduction In Read more