POSIX fcntl vs BSD flock: choosing Unix advisory file locks
Choose between POSIX fcntl record locks and BSD flock for Unix file coordination. Compare semantics, fork behavior, and NFS caveats before implementation.
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unixPhotoshop 2026.3: Batch Processing Concurrency – File Locking Without Control
Problem Context Adobe Photoshop 2026.3 supports automated batch processing via the File > Automate > Batch command. When multiple batch jobs are launched concurrently and each job references the same large PSD file, users observe significant latency spikes. The observed behavior appears to be a result of Photoshop serializing file access, but the order
Atomic rename temp file vs Deno.lockFile for retry-safe writes
A design needs to write a single output file with automatic retries and avoid duplicated or partial writes when multiple invocations overlap. The constraint is cross-platform consistency and no built-in atomic-write helper in the Deno standard library. One documented approach is write-to-temp then Deno.rename. On POSIX systems rename is commonly atomic, whic
denojsModx 2.6+ File‑Based Cache Locking: Unresolved Latency Under Concurrent Requests
Goal Investigate the latency introduced by Modx’s file‑based cache locking when multiple requests simultaneously write the same cache entry. Constraints & Uncertainty Modx 2.6+ employs PHP file locking to serialize cache writes. The documentation notes potential contention but lacks quantitative data on response times or lock‑release guarantees under hea