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- Working with Huge Databases 12923
- This page contains information for working with huge DuckDB database files. While most DuckDB databases are well below 1 TB, in our 2024 user survey , 1% of respondents used DuckDB files of 2 TB or more (corresponding to roughly 10 TB of CS
...atabase format supports huge database files without any practical restrictions, however, there are a few things to keep in mind when working with huge database files. Object storage systems have lower limits on file sizes than block-based storage sys... - https://man.mtool.work/duckdb/2.0/guides/performance/working_with_huge_databases...
- Instantiate 10031
- Overview DuckDB-Wasm can be instantiated in several ways, depending on how your application bundles and serves its assets. Each approach resolves the mainModule (the WebAssembly file) and the mainWorker (the worker script) for the browser's
...that is not cross-origin isolated it simply runs single-threaded, and bundle.pthreadWorker is null . Two things to keep in mind when deploying the threaded bundle: The page must be served with the Cross-Origin-Opener-Policy: same-origin and Cross-Ori...ch browsers expose only inside a Web Worker; DuckDB-Wasm's asynchronous API already runs in one. Keep these limitations in mind: Call CHECKPOINT to flush writes to disk. A file can be held by only one handle at a time. Drop registered files with db.d... - https://man.mtool.work/duckdb/2.0/clients/wasm/instantiation.html
- Vector Similarity Search Extension 10031
- The vss extension is an experimental extension for DuckDB that adds indexing support to accelerate vector similarity search queries using DuckDB's new fixed-size ARRAY type. See the announcement blog post and the “What's New in the Vector S
...oning for locking this feature behind an experimental flag is that “WAL” recovery is not yet properly implemented for custom indexes, meaning that if a crash occurs or the database is shut down unexpectedly while there are uncommitted changes to a HN...er a database restart, the index can be loaded back into memory from disk instead of having to be re-created. With that in mind, there are no incremental updates to persistent index storage, so every time DuckDB performs a checkpoint the entire index...upport inserting, updating and deleting rows from the table after index creation. However, there are two things to keep in mind: It's faster to create the index after the table has been populated with data as the initial bulk load can make better use... - https://man.mtool.work/duckdb/2.0/core_extensions/vss.html
- Environment 8567
- The environment where DuckDB is run has an obvious impact on performance. This page focuses on the effects of the hardware configuration and the operating system used. Hardware Configuration CPU DuckDB's officially supported architectures a
...y and/or fast data loading is important, you need fast disks, preferably SSD or NVMe with a fast connection. With these in mind, here are two common architectures and the related considerations when you are using DuckDB's native database format : Blo... - https://man.mtool.work/duckdb/2.0/guides/performance/environment.html
- Union Type 8567
- A UNION type (not to be confused with the SQL UNION operator ) is a nested type capable of holding one of multiple “alternative” values, much like the union in C. The main difference is that these UNION types are tagged unions and thus alwa
...atural usage when working with their members as “subtypes”. However, these casts have been designed with two principles in mind, to avoid ambiguity and to avoid casts that could lead to loss of information. This prevents UNION s from being completely... - https://man.mtool.work/duckdb/2.0/sql/data_types/union.html
- Deploy 7844
- Overview Deploying DuckDB-Wasm means serving its components so that the browser can fetch and instantiate them. This page describes each component a deployment needs to serve, how the worker and WebAssembly variants relate, how extensions a
...selectBundle feature-detect the best one, serve all three modules as well. When serving these files, keep the following in mind: Serve them as-is. Unlike the main library component, they require no transpilation or bundling. Serve them with the appli... - https://man.mtool.work/duckdb/2.0/clients/wasm/deploying_duckdb_wasm.html
- Securing DuckDB 7121
- DuckDB is a powerful analytical database engine. It can read and write files, access the network, load extensions, and use system resources. Like any powerful tool, these capabilities require appropriate configuration when working with sens
...ide defense-in-depth and can limit certain capabilities, but they are not a substitute for proper sandboxing. Also keep in mind that sandboxing should not just be considered for security purposes, but also for preventing denial of service (DoS) attac... - https://man.mtool.work/duckdb/2.0/operations_manual/securing_duckdb/overview.htm...
- Security 7121
- This page covers Quack's security posture end to end: what the server exposes, what stays local, the role of a TLS-terminating reverse proxy, and the authentication / authorization callbacks the server runs on every connection and every que
...n HTTP reverse proxy in front of it and let the proxy terminate TLS. The Quack client is shipped with these assumptions in mind: for non-local URIs it assumes HTTPS by default, so a properly fronted server "just works" from the client side too. See S... - https://man.mtool.work/duckdb/2.0/quack/security.html
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