--- title: MyDumper Locking Mechanisms Revisited: Introducing... description: MyDumper has consolidated its locking flags into a single unified option, --sync-thread-lock-mode, and introduced a new SAFE_NO_LOCK mode. Unlike the existing... canonical: https://daily.dev/posts/mydumper-locking-mechanisms-revisited-introducing-safe-no-lock-osacko75l twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: MyDumper Locking Mechanisms Revisited: Introducing SAFE_NO_LOCK | daily.dev og:description: MyDumper has consolidated its locking flags into a single unified option, --sync-thread-lock-mode, and introduced a new SAFE_NO_LOCK mode. Unlike the existing... og:url: https://daily.dev/posts/mydumper-locking-mechanisms-revisited-introducing-safe-no-lock-osacko75l og:image: https://api.daily.dev/og/posts/OsacKO75L.png og:image:alt: MyDumper Locking Mechanisms Revisited: Introducing SAFE_NO_LOCK og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # MyDumper Locking Mechanisms Revisited: Introducing SAFE_NO_LOCK **[Planet MySQL](https://daily.dev/sources/planet-mysql)** · 4 min read · 1 upvotes · 0 comments ## Summary MyDumper has consolidated its locking flags into a single unified option, --sync-thread-lock-mode, and introduced a new SAFE_NO_LOCK mode. Unlike the existing NO_LOCK mode which logs a warning and continues even when thread synchronization fails, SAFE_NO_LOCK implements a strict fail-fast policy: if binlog positions diverge among worker threads during initialization, the backup is immediately aborted rather than producing a silently inconsistent dump. The post breaks down all five available modes (AUTO, FTWRL, LOCK_ALL, GTID, NO_LOCK, and SAFE_NO_LOCK), explaining the trade-offs between locking impact and consistency guarantees, and provides guidance on when each mode is appropriate for production, staging, or restricted cloud environments. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [MySQL 8.0.17 GTID Crash Safety Improvement](https://daily.dev/posts/mysql-8-0-17-gtid-crash-safety-improvement-0ktrivpzl) · Planet MySQL · 0 upvotes · 0 comments - [The Postgres migration that locks your table at 3am, and how to catch it in review](https://daily.dev/posts/the-postgres-migration-that-locks-your-table-at-3am-and-how-to-catch-it-in-review-19nuvuqqn) · Medium · 0 upvotes · 0 comments --- Tags: [#mysql](https://daily.dev/tags/mysql) [View this post on daily.dev](https://daily.dev/posts/mydumper-locking-mechanisms-revisited-introducing-safe-no-lock-osacko75l) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"MyDumper Locking Mechanisms Revisited: Introducing SAFE_NO_LOCK","url":"https://daily.dev/posts/mydumper-locking-mechanisms-revisited-introducing-safe-no-lock-osacko75l","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/mydumper-locking-mechanisms-revisited-introducing-safe-no-lock-osacko75l"},"datePublished":"2026-07-13T12:51:05.011Z","dateModified":"2026-07-13T12:51:38.179Z","description":"MyDumper has consolidated its locking flags into a single unified option, --sync-thread-lock-mode, and introduced a new SAFE_NO_LOCK mode. 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