datafusion_execution/
runtime_env.rs

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4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
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8//
9//   http://www.apache.org/licenses/LICENSE-2.0
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15// specific language governing permissions and limitations
16// under the License.
17
18//! Execution [`RuntimeEnv`] environment that manages access to object
19//! store, memory manager, disk manager.
20
21#[expect(deprecated)]
22use crate::disk_manager::DiskManagerConfig;
23use crate::{
24    disk_manager::{DiskManager, DiskManagerBuilder, DiskManagerMode},
25    memory_pool::{
26        GreedyMemoryPool, MemoryPool, TrackConsumersPool, UnboundedMemoryPool,
27    },
28    object_store::{DefaultObjectStoreRegistry, ObjectStoreRegistry},
29};
30
31use crate::cache::cache_manager::{CacheManager, CacheManagerConfig};
32#[cfg(feature = "parquet_encryption")]
33use crate::parquet_encryption::{EncryptionFactory, EncryptionFactoryRegistry};
34use datafusion_common::{Result, config::ConfigEntry};
35use object_store::ObjectStore;
36use std::sync::Arc;
37use std::{
38    fmt::{Debug, Formatter},
39    num::NonZeroUsize,
40};
41use std::{path::PathBuf, time::Duration};
42use url::Url;
43
44#[derive(Clone)]
45/// Execution runtime environment that manages system resources such
46/// as memory, disk, cache and storage.
47///
48/// A [`RuntimeEnv`] can be created using [`RuntimeEnvBuilder`] and has the
49/// following resource management functionality:
50///
51/// * [`MemoryPool`]: Manage memory
52/// * [`DiskManager`]: Manage temporary files on local disk
53/// * [`CacheManager`]: Manage temporary cache data during the session lifetime
54/// * [`ObjectStoreRegistry`]: Manage mapping URLs to object store instances
55///
56/// # Example: Create default `RuntimeEnv`
57/// ```
58/// # use datafusion_execution::runtime_env::RuntimeEnv;
59/// let runtime_env = RuntimeEnv::default();
60/// ```
61///
62/// # Example: Create a `RuntimeEnv` from [`RuntimeEnvBuilder`] with a new memory pool
63/// ```
64/// # use std::sync::Arc;
65/// # use datafusion_execution::memory_pool::GreedyMemoryPool;
66/// # use datafusion_execution::runtime_env::{RuntimeEnv, RuntimeEnvBuilder};
67/// // restrict to using at most 100MB of memory
68/// let pool_size = 100 * 1024 * 1024;
69/// let runtime_env = RuntimeEnvBuilder::new()
70///     .with_memory_pool(Arc::new(GreedyMemoryPool::new(pool_size)))
71///     .build()
72///     .unwrap();
73/// ```
74pub struct RuntimeEnv {
75    /// Runtime memory management
76    pub memory_pool: Arc<dyn MemoryPool>,
77    /// Manage temporary files during query execution
78    pub disk_manager: Arc<DiskManager>,
79    /// Manage temporary cache during query execution
80    pub cache_manager: Arc<CacheManager>,
81    /// Object Store Registry
82    pub object_store_registry: Arc<dyn ObjectStoreRegistry>,
83    /// Parquet encryption factory registry
84    #[cfg(feature = "parquet_encryption")]
85    pub parquet_encryption_factory_registry: Arc<EncryptionFactoryRegistry>,
86}
87
88impl Debug for RuntimeEnv {
89    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
90        write!(f, "RuntimeEnv")
91    }
92}
93
94/// Creates runtime configuration entries with the provided values
95///
96/// This helper function defines the structure and metadata for all runtime configuration
97/// entries to avoid duplication between `RuntimeEnv::config_entries()` and
98/// `RuntimeEnvBuilder::entries()`.
99fn create_runtime_config_entries(
100    memory_limit: Option<String>,
101    max_temp_directory_size: Option<String>,
102    temp_directory: Option<String>,
103    metadata_cache_limit: Option<String>,
104    list_files_cache_limit: Option<String>,
105    list_files_cache_ttl: Option<String>,
106) -> Vec<ConfigEntry> {
107    vec![
108        ConfigEntry {
109            key: "datafusion.runtime.memory_limit".to_string(),
110            value: memory_limit,
111            description: "Maximum memory limit for query execution. Supports suffixes K (kilobytes), M (megabytes), and G (gigabytes). Example: '2G' for 2 gigabytes.",
112        },
113        ConfigEntry {
114            key: "datafusion.runtime.max_temp_directory_size".to_string(),
115            value: max_temp_directory_size,
116            description: "Maximum temporary file directory size. Supports suffixes K (kilobytes), M (megabytes), and G (gigabytes). Example: '2G' for 2 gigabytes.",
117        },
118        ConfigEntry {
119            key: "datafusion.runtime.temp_directory".to_string(),
120            value: temp_directory,
121            description: "The path to the temporary file directory.",
122        },
123        ConfigEntry {
124            key: "datafusion.runtime.metadata_cache_limit".to_string(),
125            value: metadata_cache_limit,
126            description: "Maximum memory to use for file metadata cache such as Parquet metadata. Supports suffixes K (kilobytes), M (megabytes), and G (gigabytes). Example: '2G' for 2 gigabytes.",
127        },
128        ConfigEntry {
129            key: "datafusion.runtime.list_files_cache_limit".to_string(),
130            value: list_files_cache_limit,
131            description: "Maximum memory to use for list files cache. Supports suffixes K (kilobytes), M (megabytes), and G (gigabytes). Example: '2G' for 2 gigabytes.",
132        },
133        ConfigEntry {
134            key: "datafusion.runtime.list_files_cache_ttl".to_string(),
135            value: list_files_cache_ttl,
136            description: "TTL (time-to-live) of the entries in the list file cache. Supports units m (minutes), and s (seconds). Example: '2m' for 2 minutes.",
137        },
138    ]
139}
140
141impl RuntimeEnv {
142    /// Registers a custom `ObjectStore` to be used with a specific url.
143    /// This allows DataFusion to create external tables from urls that do not have
144    /// built in support such as `hdfs://namenode:port/...`.
145    ///
146    /// Returns the [`ObjectStore`] previously registered for this
147    /// scheme, if any.
148    ///
149    /// See [`ObjectStoreRegistry`] for more details
150    ///
151    /// # Example: Register local file system object store
152    /// ```
153    /// # use std::sync::Arc;
154    /// # use url::Url;
155    /// # use datafusion_execution::runtime_env::RuntimeEnv;
156    /// # let runtime_env = RuntimeEnv::default();
157    /// let url = Url::try_from("file://").unwrap();
158    /// let object_store = object_store::local::LocalFileSystem::new();
159    /// // register the object store with the runtime environment
160    /// runtime_env.register_object_store(&url, Arc::new(object_store));
161    /// ```
162    ///
163    /// # Example: Register remote URL object store like [Github](https://github.com)
164    /// ```
165    /// # use std::sync::Arc;
166    /// # use url::Url;
167    /// # use datafusion_execution::runtime_env::RuntimeEnv;
168    /// # let runtime_env = RuntimeEnv::default();
169    /// # // use local store for example as http feature is not enabled
170    /// # let http_store = object_store::local::LocalFileSystem::new();
171    /// // create a new object store via object_store::http::HttpBuilder;
172    /// let base_url = Url::parse("https://github.com").unwrap();
173    /// // (note this example can't depend on the http feature)
174    /// // let http_store = HttpBuilder::new()
175    /// //    .with_url(base_url.clone())
176    /// //    .build()
177    /// //    .unwrap();
178    /// // register the object store with the runtime environment
179    /// runtime_env.register_object_store(&base_url, Arc::new(http_store));
180    /// ```
181    pub fn register_object_store(
182        &self,
183        url: &Url,
184        object_store: Arc<dyn ObjectStore>,
185    ) -> Option<Arc<dyn ObjectStore>> {
186        self.object_store_registry.register_store(url, object_store)
187    }
188
189    /// Deregisters a custom `ObjectStore` previously registered for a specific url.
190    /// See [`ObjectStoreRegistry::deregister_store`] for more details.
191    pub fn deregister_object_store(&self, url: &Url) -> Result<Arc<dyn ObjectStore>> {
192        self.object_store_registry.deregister_store(url)
193    }
194
195    /// Retrieves a `ObjectStore` instance for a url by consulting the
196    /// registry. See [`ObjectStoreRegistry::get_store`] for more
197    /// details.
198    pub fn object_store(&self, url: impl AsRef<Url>) -> Result<Arc<dyn ObjectStore>> {
199        self.object_store_registry.get_store(url.as_ref())
200    }
201
202    /// Register an [`EncryptionFactory`] with an associated identifier that can be later
203    /// used to configure encryption when reading or writing Parquet.
204    /// If an encryption factory with the same identifier was already registered, it is replaced and returned.
205    #[cfg(feature = "parquet_encryption")]
206    pub fn register_parquet_encryption_factory(
207        &self,
208        id: &str,
209        encryption_factory: Arc<dyn EncryptionFactory>,
210    ) -> Option<Arc<dyn EncryptionFactory>> {
211        self.parquet_encryption_factory_registry
212            .register_factory(id, encryption_factory)
213    }
214
215    /// Retrieve an [`EncryptionFactory`] by its identifier
216    #[cfg(feature = "parquet_encryption")]
217    pub fn parquet_encryption_factory(
218        &self,
219        id: &str,
220    ) -> Result<Arc<dyn EncryptionFactory>> {
221        self.parquet_encryption_factory_registry.get_factory(id)
222    }
223
224    /// Returns the current runtime configuration entries
225    pub fn config_entries(&self) -> Vec<ConfigEntry> {
226        use crate::memory_pool::MemoryLimit;
227
228        /// Convert bytes to a human-readable format
229        fn format_byte_size(size: u64) -> String {
230            const GB: u64 = 1024 * 1024 * 1024;
231            const MB: u64 = 1024 * 1024;
232            const KB: u64 = 1024;
233
234            match size {
235                s if s >= GB => format!("{}G", s / GB),
236                s if s >= MB => format!("{}M", s / MB),
237                s if s >= KB => format!("{}K", s / KB),
238                s => format!("{s}"),
239            }
240        }
241
242        fn format_duration(duration: Duration) -> String {
243            let total = duration.as_secs();
244            let mins = total / 60;
245            let secs = total % 60;
246
247            format!("{mins}m{secs}s")
248        }
249
250        let memory_limit_value = match self.memory_pool.memory_limit() {
251            MemoryLimit::Finite(size) => Some(format_byte_size(
252                size.try_into()
253                    .expect("Memory limit size conversion failed"),
254            )),
255            MemoryLimit::Infinite => Some("unlimited".to_string()),
256            MemoryLimit::Unknown => None,
257        };
258
259        let max_temp_dir_size = self.disk_manager.max_temp_directory_size();
260        let max_temp_dir_value = format_byte_size(max_temp_dir_size);
261
262        let temp_paths = self.disk_manager.temp_dir_paths();
263        let temp_dir_value = if temp_paths.is_empty() {
264            None
265        } else {
266            Some(
267                temp_paths
268                    .iter()
269                    .map(|p| p.display().to_string())
270                    .collect::<Vec<_>>()
271                    .join(","),
272            )
273        };
274
275        let metadata_cache_limit = self.cache_manager.get_metadata_cache_limit();
276        let metadata_cache_value = format_byte_size(
277            metadata_cache_limit
278                .try_into()
279                .expect("Metadata cache size conversion failed"),
280        );
281
282        let list_files_cache_limit = self.cache_manager.get_list_files_cache_limit();
283        let list_files_cache_value = format_byte_size(
284            list_files_cache_limit
285                .try_into()
286                .expect("List files cache size conversion failed"),
287        );
288
289        let list_files_cache_ttl = self
290            .cache_manager
291            .get_list_files_cache_ttl()
292            .map(format_duration);
293
294        create_runtime_config_entries(
295            memory_limit_value,
296            Some(max_temp_dir_value),
297            temp_dir_value,
298            Some(metadata_cache_value),
299            Some(list_files_cache_value),
300            list_files_cache_ttl,
301        )
302    }
303}
304
305impl Default for RuntimeEnv {
306    fn default() -> Self {
307        RuntimeEnvBuilder::new().build().unwrap()
308    }
309}
310
311/// Execution runtime configuration builder.
312///
313/// See example on [`RuntimeEnv`]
314#[derive(Clone)]
315pub struct RuntimeEnvBuilder {
316    #[expect(deprecated)]
317    /// DiskManager to manage temporary disk file usage
318    pub disk_manager: DiskManagerConfig,
319    /// DiskManager builder to manager temporary disk file usage
320    pub disk_manager_builder: Option<DiskManagerBuilder>,
321    /// [`MemoryPool`] from which to allocate memory
322    ///
323    /// Defaults to using an [`UnboundedMemoryPool`] if `None`
324    pub memory_pool: Option<Arc<dyn MemoryPool>>,
325    /// CacheManager to manage cache data
326    pub cache_manager: CacheManagerConfig,
327    /// ObjectStoreRegistry to get object store based on url
328    pub object_store_registry: Arc<dyn ObjectStoreRegistry>,
329    /// Parquet encryption factory registry
330    #[cfg(feature = "parquet_encryption")]
331    pub parquet_encryption_factory_registry: Arc<EncryptionFactoryRegistry>,
332}
333
334impl Default for RuntimeEnvBuilder {
335    fn default() -> Self {
336        Self::new()
337    }
338}
339
340impl RuntimeEnvBuilder {
341    /// New with default values
342    pub fn new() -> Self {
343        Self {
344            disk_manager: Default::default(),
345            disk_manager_builder: Default::default(),
346            memory_pool: Default::default(),
347            cache_manager: Default::default(),
348            object_store_registry: Arc::new(DefaultObjectStoreRegistry::default()),
349            #[cfg(feature = "parquet_encryption")]
350            parquet_encryption_factory_registry: Default::default(),
351        }
352    }
353
354    #[expect(deprecated)]
355    #[deprecated(since = "48.0.0", note = "Use with_disk_manager_builder instead")]
356    /// Customize disk manager
357    pub fn with_disk_manager(mut self, disk_manager: DiskManagerConfig) -> Self {
358        self.disk_manager = disk_manager;
359        self
360    }
361
362    /// Customize the disk manager builder
363    pub fn with_disk_manager_builder(mut self, disk_manager: DiskManagerBuilder) -> Self {
364        self.disk_manager_builder = Some(disk_manager);
365        self
366    }
367
368    /// Customize memory policy
369    pub fn with_memory_pool(mut self, memory_pool: Arc<dyn MemoryPool>) -> Self {
370        self.memory_pool = Some(memory_pool);
371        self
372    }
373
374    /// Customize cache policy
375    pub fn with_cache_manager(mut self, cache_manager: CacheManagerConfig) -> Self {
376        self.cache_manager = cache_manager;
377        self
378    }
379
380    /// Customize object store registry
381    pub fn with_object_store_registry(
382        mut self,
383        object_store_registry: Arc<dyn ObjectStoreRegistry>,
384    ) -> Self {
385        self.object_store_registry = object_store_registry;
386        self
387    }
388
389    /// Specify the total memory to use while running the DataFusion
390    /// plan to `max_memory * memory_fraction` in bytes.
391    ///
392    /// This defaults to using [`GreedyMemoryPool`] wrapped in the
393    /// [`TrackConsumersPool`] with a maximum of 5 consumers.
394    ///
395    /// Note DataFusion does not yet respect this limit in all cases.
396    pub fn with_memory_limit(self, max_memory: usize, memory_fraction: f64) -> Self {
397        let pool_size = (max_memory as f64 * memory_fraction) as usize;
398        self.with_memory_pool(Arc::new(TrackConsumersPool::new(
399            GreedyMemoryPool::new(pool_size),
400            NonZeroUsize::new(5).unwrap(),
401        )))
402    }
403
404    /// Use the specified path to create any needed temporary files
405    pub fn with_temp_file_path(mut self, path: impl Into<PathBuf>) -> Self {
406        let builder = self.disk_manager_builder.take().unwrap_or_default();
407        self.with_disk_manager_builder(
408            builder.with_mode(DiskManagerMode::Directories(vec![path.into()])),
409        )
410    }
411
412    /// Specify a limit on the size of the temporary file directory in bytes
413    pub fn with_max_temp_directory_size(mut self, size: u64) -> Self {
414        let builder = self.disk_manager_builder.take().unwrap_or_default();
415        self.with_disk_manager_builder(builder.with_max_temp_directory_size(size))
416    }
417
418    /// Specify the limit of the file-embedded metadata cache, in bytes.
419    pub fn with_metadata_cache_limit(mut self, limit: usize) -> Self {
420        self.cache_manager = self.cache_manager.with_metadata_cache_limit(limit);
421        self
422    }
423
424    /// Specifies the memory limit for the object list cache, in bytes.
425    pub fn with_object_list_cache_limit(mut self, limit: usize) -> Self {
426        self.cache_manager = self.cache_manager.with_list_files_cache_limit(limit);
427        self
428    }
429
430    /// Specifies the duration entries in the object list cache will be considered valid.
431    pub fn with_object_list_cache_ttl(mut self, ttl: Option<Duration>) -> Self {
432        self.cache_manager = self.cache_manager.with_list_files_cache_ttl(ttl);
433        self
434    }
435
436    /// Build a RuntimeEnv
437    pub fn build(self) -> Result<RuntimeEnv> {
438        let Self {
439            disk_manager,
440            disk_manager_builder,
441            memory_pool,
442            cache_manager,
443            object_store_registry,
444            #[cfg(feature = "parquet_encryption")]
445            parquet_encryption_factory_registry,
446        } = self;
447        let memory_pool =
448            memory_pool.unwrap_or_else(|| Arc::new(UnboundedMemoryPool::default()));
449
450        Ok(RuntimeEnv {
451            memory_pool,
452            disk_manager: if let Some(builder) = disk_manager_builder {
453                Arc::new(builder.build()?)
454            } else {
455                #[expect(deprecated)]
456                DiskManager::try_new(disk_manager)?
457            },
458            cache_manager: CacheManager::try_new(&cache_manager)?,
459            object_store_registry,
460            #[cfg(feature = "parquet_encryption")]
461            parquet_encryption_factory_registry,
462        })
463    }
464
465    /// Convenience method to create a new `Arc<RuntimeEnv>`
466    pub fn build_arc(self) -> Result<Arc<RuntimeEnv>> {
467        self.build().map(Arc::new)
468    }
469
470    /// Create a new RuntimeEnvBuilder from an existing RuntimeEnv
471    pub fn from_runtime_env(runtime_env: &RuntimeEnv) -> Self {
472        let cache_config = CacheManagerConfig {
473            table_files_statistics_cache: runtime_env
474                .cache_manager
475                .get_file_statistic_cache(),
476            list_files_cache: runtime_env.cache_manager.get_list_files_cache(),
477            list_files_cache_limit: runtime_env
478                .cache_manager
479                .get_list_files_cache_limit(),
480            list_files_cache_ttl: runtime_env.cache_manager.get_list_files_cache_ttl(),
481            file_metadata_cache: Some(
482                runtime_env.cache_manager.get_file_metadata_cache(),
483            ),
484            metadata_cache_limit: runtime_env.cache_manager.get_metadata_cache_limit(),
485        };
486
487        Self {
488            #[expect(deprecated)]
489            disk_manager: DiskManagerConfig::Existing(Arc::clone(
490                &runtime_env.disk_manager,
491            )),
492            disk_manager_builder: None,
493            memory_pool: Some(Arc::clone(&runtime_env.memory_pool)),
494            cache_manager: cache_config,
495            object_store_registry: Arc::clone(&runtime_env.object_store_registry),
496            #[cfg(feature = "parquet_encryption")]
497            parquet_encryption_factory_registry: Arc::clone(
498                &runtime_env.parquet_encryption_factory_registry,
499            ),
500        }
501    }
502
503    /// Returns a list of all available runtime configurations with their current values and descriptions
504    pub fn entries(&self) -> Vec<ConfigEntry> {
505        create_runtime_config_entries(
506            None,
507            Some("100G".to_string()),
508            None,
509            Some("50M".to_owned()),
510            Some("1M".to_owned()),
511            None,
512        )
513    }
514
515    /// Generate documentation that can be included in the user guide
516    pub fn generate_config_markdown() -> String {
517        use std::fmt::Write as _;
518
519        let s = Self::default();
520
521        let mut docs = "| key | default | description |\n".to_string();
522        docs += "|-----|---------|-------------|\n";
523        let mut entries = s.entries();
524        entries.sort_unstable_by(|a, b| a.key.cmp(&b.key));
525
526        for entry in &entries {
527            let _ = writeln!(
528                &mut docs,
529                "| {} | {} | {} |",
530                entry.key,
531                entry.value.as_deref().unwrap_or("NULL"),
532                entry.description
533            );
534        }
535        docs
536    }
537}
datafusion_execution/runtime_env.rs

datafusion_execution/
runtime_env.rs
