SBD: We Have a Filesystem at Home

Sprites, a new infrastructure product, originally used a custom-modified JuiceFS filesystem to bridge the gap between object storage and Linux's file operations, but as usage grew, the dual-component system of bucket chunks and metadata databases became unreliable and prone to synchronization errors. The team has replaced this with the Sprites Block Device (SBD), a simpler approach that maintains the core principle of object storage as the durable state while improving reliability through a more straightforward architecture.