Tag
write-ordering
- Aug 27, 2026 Storage Handoff: Moving a Guest's Disk With It Block devices cannot be frozen and copied like RAM. Either the disk stays put and is re-attached, or its contents move while the guest writes, and each option has a different consistency failure. virtualization
- May 25, 2026 Checksum Blind Spots: Misdirected Writes and Lost Updates The fault classes that survive a correct checksum, from acknowledged writes that never landed to corruption introduced above the filesystem, and the ordering machinery each one needs. filesystems
- Jan 14, 2026 A Completed Write Is Not Yet Durable: Persistence Domains and Ordering Why write and close return long before bytes reach media, how a persistence domain decides what a crash can lose, and why durability, ordering, and atomicity need separate mechanisms. memory systems
- Sep 13, 2024 Cache Flushes and FUA: The Two Ordering Primitives Below the Filesystem How a flush drains a volatile device cache, how forced unit access bypasses it for a single write, and why both are required to build a write barrier out of a queue that reorders. memory systems
- Jul 12, 2024 Cache Flush, FUA, and What a Write Completion Means How a device with a volatile write cache reorders writes, what a flush and a force-unit-access write each promise, and why the barrier is only as good as the drive. filesystems
- Oct 2, 2023 Write Ordering and the Crash Window Between Metadata Updates Why a filesystem that issues correct writes in the right order can still be corrupt after a power loss, and how ordering constraints, atomicity, and recovery strategies separate. filesystems