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Examples/doctests for Options methods

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Karl Hobley 8 years ago committed by Karl Hobley
parent 4596aeda5f
commit 3975276ee0
1 changed files with 253 additions and 5 deletions
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  1. 258
      src/rocksdb_options.rs

258
src/rocksdb_options.rs
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@ -114,6 +114,15 @@ impl Options {
/// `total_threads` is used. Good value for `total_threads` is the number of
/// cores. You almost definitely want to call this function if your system is
/// bottlenecked by RocksDB.
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.increase_parallelism(3);
/// ```
pub fn increase_parallelism(&mut self, parallelism: i32) {
unsafe {
rocksdb_ffi::rocksdb_options_increase_parallelism(self.inner,
@ -132,6 +141,15 @@ impl Options {
/// If true, the database will be created if it is missing.
///
/// Default: false
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.create_if_missing(true);
/// ```
pub fn create_if_missing(&mut self, create_if_missing: bool) {
unsafe {
rocksdb_ffi::rocksdb_options_set_create_if_missing(
@ -144,6 +162,15 @@ impl Options {
/// levels after base level.
///
/// Default: DBCompressionType::None
///
/// # Example
///
/// ```
/// use rocksdb::{Options, DBCompressionType};
///
/// let mut opts = Options::default();
/// opts.set_compression_type(DBCompressionType::Snappy);
/// ```
pub fn set_compression_type(&mut self, t: DBCompressionType) {
unsafe {
rocksdb_ffi::rocksdb_options_set_compression(self.inner, t);
@ -157,6 +184,21 @@ impl Options {
/// be slower. This array, if non-empty, should have an entry for
/// each level of the database; these override the value specified in
/// the previous field 'compression'.
///
/// # Example
///
/// ```
/// use rocksdb::{Options, DBCompressionType};
///
/// let mut opts = Options::default();
/// opts.compression_per_level(&[
/// DBCompressionType::None,
/// DBCompressionType::None,
/// DBCompressionType::Snappy,
/// DBCompressionType::Snappy,
/// DBCompressionType::Snappy
/// ]);
/// ```
pub fn compression_per_level(&mut self, level_types: &[DBCompressionType]) {
unsafe {
rocksdb_ffi::rocksdb_options_set_compression_per_level(self.inner,
@ -237,6 +279,15 @@ impl Options {
/// compaction. For universal-style compaction, you can usually set it to -1.
///
/// Default: -1
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_max_open_files(10);
/// ```
pub fn set_max_open_files(&mut self, nfiles: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_max_open_files(self.inner, nfiles);
@ -247,7 +298,17 @@ impl Options {
/// If false, then every store to stable storage will issue a fdatasync.
/// This parameter should be set to true while storing data to
/// filesystem like ext3 that can lose files after a reboot.
///
/// Default: false
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_use_fsync(true);
/// ```
pub fn set_use_fsync(&mut self, useit: bool) {
unsafe {
if useit {
@ -271,6 +332,15 @@ impl Options {
/// to 1MB.
///
/// This option applies to table files
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_bytes_per_sync(1024 * 1024);
/// ```
pub fn set_bytes_per_sync(&mut self, nbytes: u64) {
unsafe {
rocksdb_ffi::rocksdb_options_set_bytes_per_sync(self.inner, nbytes);
@ -305,6 +375,15 @@ impl Options {
/// be used. Memory mapped files are not impacted by this parameter.
///
/// Default: true
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.allow_os_buffer(false);
/// ```
pub fn allow_os_buffer(&mut self, is_allow: bool) {
unsafe {
rocksdb_ffi::rocksdb_options_set_allow_os_buffer(self.inner,
@ -313,6 +392,17 @@ impl Options {
}
/// Sets the number of shards used for table cache.
///
/// Default: 6
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_table_cache_num_shard_bits(4);
/// ```
pub fn set_table_cache_num_shard_bits(&mut self, nbits: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_table_cache_numshardbits(self.inner,
@ -329,6 +419,15 @@ impl Options {
/// individual write buffers.
///
/// Default: 1
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_min_write_buffer_number(2);
/// ```
pub fn set_min_write_buffer_number(&mut self, nbuf: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_min_write_buffer_number_to_merge(
@ -360,6 +459,15 @@ impl Options {
/// If using a TransactionDB/OptimisticTransactionDB, the default value will
/// be set to the value of 'max_write_buffer_number' if it is not explicitly
/// set by the user. Otherwise, the default is 0.
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_min_write_buffer_number(4);
/// ```
pub fn set_max_write_buffer_number(&mut self, nbuf: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_max_write_buffer_number(self.inner,
@ -380,9 +488,18 @@ impl Options {
/// Note that write_buffer_size is enforced per column family.
/// See db_write_buffer_size for sharing memory across column families.
///
/// Default: 64MB
/// Default: 67108864 (64MiB)
///
/// Dynamically changeable through SetOptions() API
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_write_buffer_size(128 * 1024 * 1024);
/// ```
pub fn set_write_buffer_size(&mut self, size: usize) {
unsafe {
rocksdb_ffi::rocksdb_options_set_write_buffer_size(self.inner,
@ -399,9 +516,18 @@ impl Options {
/// will be 200MB, total file size for level-2 will be 2GB,
/// and total file size for level-3 will be 20GB.
///
/// Default: 256MB.
/// Default: 268435456 (256MiB).
///
/// Dynamically changeable through SetOptions() API
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_max_bytes_for_level_base(512 * 1024 * 1024);
/// ```
pub fn set_max_bytes_for_level_base(&mut self, size: u64) {
unsafe {
rocksdb_ffi::rocksdb_options_set_max_bytes_for_level_base(self.inner, size);
@ -409,6 +535,15 @@ impl Options {
}
/// Default: 10
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_max_bytes_for_level_multiplier(4);
/// ```
pub fn set_max_bytes_for_level_multiplier(&mut self, mul: i32) {
unsafe {
rocksdb_ffi::rocksdb_options_set_max_bytes_for_level_multiplier(self.inner, mul);
@ -425,8 +560,7 @@ impl Options {
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// let size = 20 * 1024 * 1024;
/// opts.set_max_manifest_file_size(size);
/// opts.set_max_manifest_file_size(20 * 1024 * 1024);
/// ```
pub fn set_max_manifest_file_size(&mut self, size: usize) {
unsafe {
@ -443,9 +577,18 @@ impl Options {
/// be 2MB, and each file on level 2 will be 20MB,
/// and each file on level-3 will be 200MB.
///
/// Default: 64MB.
/// Default: 67108864 (64MiB)
///
/// Dynamically changeable through SetOptions() API
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_target_file_size_base(128 * 1024 * 1024);
/// ```
pub fn set_target_file_size_base(&mut self, size: u64) {
unsafe {
rocksdb_ffi::rocksdb_options_set_target_file_size_base(self.inner,
@ -462,6 +605,15 @@ impl Options {
/// individual write buffers.
///
/// Default: 1
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_min_write_buffer_number_to_merge(2);
/// ```
pub fn set_min_write_buffer_number_to_merge(&mut self, to_merge: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_min_write_buffer_number_to_merge(
@ -475,6 +627,15 @@ impl Options {
/// Default: 4
///
/// Dynamically changeable through SetOptions() API
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_level_zero_file_num_compaction_trigger(8);
/// ```
pub fn set_level_zero_file_num_compaction_trigger(&mut self, n: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_level0_file_num_compaction_trigger(
@ -486,7 +647,18 @@ impl Options {
/// point. A value <0 means that no writing slow down will be triggered by
/// number of files in level-0.
///
/// Default: 20
///
/// Dynamically changeable through SetOptions() API
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_level_zero_slowdown_writes_trigger(10);
/// ```
pub fn set_level_zero_slowdown_writes_trigger(&mut self, n: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_level0_slowdown_writes_trigger(
@ -496,7 +668,18 @@ impl Options {
/// Sets the maximum number of level-0 files. We stop writes at this point.
///
/// Default: 24
///
/// Dynamically changeable through SetOptions() API
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_level_zero_stop_writes_trigger(48);
/// ```
pub fn set_level_zero_stop_writes_trigger(&mut self, n: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_level0_stop_writes_trigger(
@ -507,6 +690,15 @@ impl Options {
/// Sets the compaction style.
///
/// Default: DBCompactionStyle::Level
///
/// # Example
///
/// ```
/// use rocksdb::{Options, DBCompactionStyle};
///
/// let mut opts = Options::default();
/// opts.set_compaction_style(DBCompactionStyle::Universal);
/// ```
pub fn set_compaction_style(&mut self,
style: rocksdb_ffi::DBCompactionStyle) {
unsafe {
@ -528,6 +720,15 @@ impl Options {
/// Env::SetBackgroundThreads
///
/// Default: 1
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_max_background_compactions(2);
/// ```
pub fn set_max_background_compactions(&mut self, n: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_max_background_compactions(
@ -551,6 +752,15 @@ impl Options {
/// Env::SetBackgroundThreads
///
/// Default: 1
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_max_background_flushes(2);
/// ```
pub fn set_max_background_flushes(&mut self, n: c_int) {
unsafe {
rocksdb_ffi::rocksdb_options_set_max_background_flushes(self.inner,
@ -561,7 +771,18 @@ impl Options {
/// Disables automatic compactions. Manual compactions can still
/// be issued on this column family
///
/// Default: false
///
/// Dynamically changeable through SetOptions() API
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_disable_auto_compactions(true);
/// ```
pub fn set_disable_auto_compactions(&mut self, disable: bool) {
let c_bool = if disable {
1
@ -583,6 +804,15 @@ impl Options {
/// Measure IO stats in compactions and flushes, if true.
///
/// Default: false
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_report_bg_io_stats(true);
/// ```
pub fn set_report_bg_io_stats(&mut self, enable: bool) {
unsafe {
if enable {
@ -596,6 +826,15 @@ impl Options {
/// Recovery mode to control the consistency while replaying WAL
///
/// Default: DBRecoveryMode::PointInTime
///
/// # Example
///
/// ```
/// use rocksdb::{Options, DBRecoveryMode};
///
/// let mut opts = Options::default();
/// opts.set_wal_recovery_mode(DBRecoveryMode::AbsoluteConsistency);
/// ```
pub fn set_wal_recovery_mode(&mut self, mode: DBRecoveryMode) {
unsafe {
rocksdb_ffi::rocksdb_options_set_wal_recovery_mode(self.inner, mode);
@ -627,6 +866,15 @@ impl Options {
/// If not zero, dump rocksdb.stats to LOG every stats_dump_period_sec
///
/// Default: 600 (10 min)
///
/// # Example
///
/// ```
/// use rocksdb::Options;
///
/// let mut opts = Options::default();
/// opts.set_stats_dump_period_sec(300);
/// ```
pub fn set_stats_dump_period_sec(&mut self, period: usize) {
unsafe {
rocksdb_ffi::rocksdb_options_set_stats_dump_period_sec(self.inner,

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