Answer
Overlay2 causes write latency and fsync issues affecting DB durability.
Quick Answer
Databases do heavy sequential writes and need low-latency fsync. Some storage drivers (devicemapper, btrfs) add copy-on-write overhead to every write, increasing latency. For databases in Docker, use a named volume mapped to a fast storage path (not the overlay filesystem), and choose OverlayFS2 or direct-lvm devicemapper.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ