Configuration

Configuration objects can be used when creating a TileDB context, or when using consolidation and virtual filesystem (VFS) functionality. See Configuration Parameters for a summary of all TileDB configuration options.
Basic Usage
You can create and set configuration objects as follows: 
C
C++
Python
R
Java
Go
C
// Create a configuration object
tiledb_config_t *config;
tiledb_config_alloc(&config, NULL);
​
// Set a configuration parameter
tiledb_config_set(config, "sm.tile_cache_size", "5000", &error);
​
// Get a configuration parameter
const char* value;
tiledb_config_get(config, "sm.tile_cache_size", &value, &error);
​
// Unset a configuration parameter
tiledb_config_unset(config, "sm.tile_cache_size", &error);
​
// Clean up
tiledb_config_free(&config);
C++
// Create a configuration object
Config config;
​
// Set a configuration parameter
config["sm.tile_cache_size"] = "5000";
​
// Get a configuration parameter
std::string = config["sm.tile_cache_size"];
​
// Unset a configuration parameter
config.unset("sm.tile_cache_size");
Python
# Create a configuration object
config = tiledb.Config()
​
# Set a configuration parameter
config["sm.tile_cache_size"] = 5000
​
# Config objects may also be initialized with a dictionary
config = tiledb.Config({"sm.tile_cache_size": 5000})
​
# Remove a configuration parameter
# (resets to the default value)
del config["sm.tile_cache_size"]
R
# Create a configuration object
config <- tiledb_config()
​
# Set a configuration parameter
config["sm.tile_cache_size"] <- "5000"
​
# Get a configuration parameter
tile_cache_size <- config["sm.tile_cache_size"]
​
# Unset a configuration parameter
tiledb_config_unset(config, "sm.tile_cache_size")
Java
try(Config config = new Config()) {
    // Set a configuration parameter
    config.set("sm.tile_cache_size", "5000");
    
    // Get a configuration parameter
    String tile_cache_size = config.get("sm.tile_cache_size");
    
    // Unset a configuration parameter
    config.unset("sm.tile_cache_size");
}
Go
// Create a configuration object
config, _ := tiledb.NewConfig()
​
// Set a configuration parameter
config.Set("sm.tile_cache_size", "5000");
​
// Get a configuration parameter
smTileCacheSize, _ := config.Get("sm.tile_cache_size")
​
// Unset a configuration parameter
config.Unset("sm.tile_cache_size")
​
// Clean up
config.Free()
Saving To / Loading From File
You can save a configuration object into a text file, as well as load a configuration object from a text file, as follows:
C
C++
Python
R
Java
Go
C
// Create a TileDB config
tiledb_config_t* config;
tiledb_config_alloc(&config, NULL);
tiledb_config_set(config, "sm.tile_cache_size", "0", &error);
​
// Save to file
tiledb_config_save_to_file(config, "tiledb_config.txt", &error);
​
// Load from file
tiledb_config_t* config_load;
tiledb_config_alloc(&config_load, &error);
tiledb_config_load_from_file(config_load, "tiledb_config.txt", &error);
const char* value;
tiledb_config_get(config_load, "sm.tile_cache_size", &value, &error);
​
// Clean up
tiledb_config_free(&config);
tiledb_config_free(&config_load);
C++
// Save to file
Config config;
config["sm.tile_cache_size"] = 0;
config.save_to_file("tiledb_config.txt");
​
// Load from file
Config config_load("tiledb_config.txt");
std::string tile_cache_size = config_load["sm.tile_cache_size"];
Python
config = tiledb.Config()
config["sm.tile_cache_size"] = 0
config.save("tiledb_config.txt")
​
config_load = tiledb.Config.load("tiledb_config.txt")
R
# Save to file
config <- tiledb_config()
config["sm.tile_cache_size"] <- 0;
tiledb_config_save(config, "tiledb_config.txt")
​
# Load from file
config_loaded <- tiledb_config_load("tiledb_config.txt")
tile_cache_size = config_loaded["sm.tile_cache_size"]
Java
// Save to file
try(Config config = new Config()) {
    config.set("sm.tile_cache_size", "0");
    config.saveToFile("tiledb_config.txt");
​
    // Load from file
    Config config_load = new Config("tiledb_config.txt");
    String tile_cache_size = config_load.get("sm.tile_cache_size");
}
Go
// Create a TileDB config
config, _ := tiledb.NewConfig()
​
// Set a value
config.Set("sm.tile_cache_size", "8")
​
// Save to file
config.SaveToFile(configFileName)
​
// Load from file
newConfig, _ := tiledb.LoadConfig(configFileName)
​
// Retrieve value
smTileCacheSize, _ := newConfig.Get("sm.tile_cache_size")
​
// Clean up
config.Free()
Configuration Iterator
You can also use a configuration iterator as follows:
C
C++
Python
R
Java
Go
C
 // Create a TileDB config
tiledb_config_t* config;
tiledb_config_alloc(&config, NULL);
​
// Create a TileDB config iterator
// You can use any prefix instead of "vfs.s3."
tiledb_config_iter_t* config_iter;
tiledb_config_iter_alloc(config, "vfs.s3.", &config_iter, &error);
​
// Print all configuration parameters that start with "vfs.s3"
// Note that the prefix is exluded from the results
printf("\nVFS S3 settings:\n");
int done = 0;
const char *param, *value;
tiledb_config_iter_done(config_iter, &done, &error);
while (!done) {
  tiledb_config_iter_here(config_iter, &param, &value, &error);
  printf("\"%s\" : \"%s\"\n", param, value);
  tiledb_config_iter_next(config_iter, &error);
  tiledb_config_iter_done(config_iter, &done, &error);
}
​
// You can reset the iterator as follows
tiledb_config_iter_reset(config, config_iter, NULL, NULL);
​
// Clean up
tiledb_config_free(&config);
tiledb_config_iter_free(&config_iter);
C++
Config config;
​
// Print only the S3 settings
// You can use any prefix instead of "vfs.s3."
// Note that the prefix is exluded from the results
std::cout << "\nVFS S3 settings:\n";
for (auto i = config.begin("vfs.s3."); i != config.end(); ++i) {
  auto& p = *i;
  std::cout << "\"" << p.first << "\" : \"" << p.second << "\"\n";
}
Python
# ... create/open a Config object
​
for (key,value) in config.items():
    print(f"'{key}': '{value}'")
    
# keys may optionally be filtered by passing a prefix to `items()`
for (key,value) in config.items("vfs.s3."):
    print(f"'{key}': '{value}'")
R
# R has no native iterator but one loop over the config elements
# by retrieving the configuration as a vector
​
cfg <- as.vector(tiledb_config())
​
# print all non-empty config elements
for (n in names(cfg)) 
   if (cfg[n] != "") 
      cat(n, ":", cfg[n], "\n")
Java
try(Config config = new Config()) {
  // Print only the S3 settings
  // You can use any prefix instead of "vfs.s3."
  // Note that the prefix is exluded from the results
  System.out.printf("\nVFS S3 settings:\n");
  for (Map.Entry me : config.parameters("vfs.s3").entrySet()) {
    System.out.Printf("\"%s\" : \"%s\"\n", p.getKey(), p.getValue());
  }
}
Go
fmt.Println("VFS S3 settings:\n")
​
config, _ := NewConfig()
​
// Iterate the configuration
iter, _ := config.Iterate("vfs.s3.")
​
for ; !iter.IsDone(); _ = iter.Next() {
	// Get current param, value from iterator
	param, value, _ := iter.Here()
	fmt.Printf("%s: %s\n", *param, *value)
}
​
Asynchronous Queries
Array Metadata
Last updated 4 months ago