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Chris Lu
1996c6aec6
* volume server: open volume files with O_NOATIME Nothing reads the atime of .dat, .idx, .sdx, or EC files, but every needle read still dirtied the inode: even relatime writes atime on the first read after each write, so an actively written volume paid a metadata write per read/write cycle, and strictatime mounts paid one per read. Open the serving handles with O_NOATIME, falling back to a plain open when the file belongs to another owner (EPERM). Claude-Session: https://claude.ai/code/session_015uVY4diBgEn3VYQoc2eMuD * seaweed-volume: mirror the O_NOATIME volume file opens Same change as the Go volume server: serving handles for .dat, .idx, .sdx, .ecx, .ecj, and shard files open with O_NOATIME on Linux, with a plain-open fallback on EPERM. Claude-Session: https://claude.ai/code/session_015uVY4diBgEn3VYQoc2eMuD * route the tier-down and recreate .dat opens through the no-atime helper Review caught the Rust tier-down swap opening the local .dat directly. The Go swapToLocalDatBackend and the zero-length read-only .dat recreate in maybeWriteSuperBlock had the same gap: all three install long-lived serving handles. Claude-Session: https://claude.ai/code/session_015uVY4diBgEn3VYQoc2eMuD