1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885
// Copyright 2014 Tyler Neely // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // use {BlockBasedOptions, DBCompactionStyle, DBCompressionType, Options, WriteOptions}; use compaction_filter::{self, CompactionFilterCallback, CompactionFilterFn, filter_callback}; use comparator::{self, ComparatorCallback, CompareFn}; use ffi; use libc::{c_int, c_uchar, c_uint, c_void, size_t, uint64_t}; use merge_operator::{self, MergeFn, MergeOperatorCallback, full_merge_callback, partial_merge_callback}; use std::ffi::{CStr, CString}; use std::mem; pub fn new_cache(capacity: size_t) -> *mut ffi::rocksdb_cache_t { unsafe { ffi::rocksdb_cache_create_lru(capacity) } } impl Drop for Options { fn drop(&mut self) { unsafe { ffi::rocksdb_options_destroy(self.inner); } } } impl Drop for BlockBasedOptions { fn drop(&mut self) { unsafe { ffi::rocksdb_block_based_options_destroy(self.inner); } } } impl Drop for WriteOptions { fn drop(&mut self) { unsafe { ffi::rocksdb_writeoptions_destroy(self.inner); } } } impl BlockBasedOptions { pub fn set_block_size(&mut self, size: usize) { unsafe { ffi::rocksdb_block_based_options_set_block_size(self.inner, size); } } pub fn set_lru_cache(&mut self, size: size_t) { let cache = new_cache(size); unsafe { // Since cache is wrapped in shared_ptr, we don't need to // call rocksdb_cache_destroy explicitly. ffi::rocksdb_block_based_options_set_block_cache(self.inner, cache); } } pub fn set_bloom_filter(&mut self, bits_per_key: c_int, _block_based: bool) { unsafe { // let bloom = if block_based { // ffi::rocksdb_filterpolicy_create_bloom(bits_per_key) // } else { // ffi::rocksdb_filterpolicy_create_bloom_full(bits_per_key) // }; let bloom = ffi::rocksdb_filterpolicy_create_bloom(bits_per_key); ffi::rocksdb_block_based_options_set_filter_policy(self.inner, bloom); } } pub fn set_cache_index_and_filter_blocks(&mut self, v: bool) { unsafe { ffi::rocksdb_block_based_options_set_cache_index_and_filter_blocks(self.inner, v as u8); } } } impl Default for BlockBasedOptions { fn default() -> BlockBasedOptions { let block_opts = unsafe { ffi::rocksdb_block_based_options_create() }; if block_opts.is_null() { panic!("Could not create RocksDB block based options"); } BlockBasedOptions { inner: block_opts } } } impl Options { /// By default, RocksDB uses only one background thread for flush and /// compaction. Calling this function will set it up such that total of /// `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 exonum_rocksdb::Options; /// /// let mut opts = Options::default(); /// opts.increase_parallelism(3); /// ``` pub fn increase_parallelism(&mut self, parallelism: i32) { unsafe { ffi::rocksdb_options_increase_parallelism(self.inner, parallelism); } } pub fn optimize_level_style_compaction(&mut self, memtable_memory_budget: usize) { unsafe { ffi::rocksdb_options_optimize_level_style_compaction( self.inner, memtable_memory_budget as uint64_t ); } } /// If true, the database will be created if it is missing. /// /// Default: `false` /// /// # Example /// /// ``` /// use exonum_rocksdb::Options; /// /// let mut opts = Options::default(); /// opts.create_if_missing(true); /// ``` pub fn create_if_missing(&mut self, create_if_missing: bool) { unsafe { ffi::rocksdb_options_set_create_if_missing(self.inner, create_if_missing as c_uchar); } } /// Sets the compression algorithm that will be used for the bottommost level that /// contain files. If level-compaction is used, this option will only affect /// levels after base level. /// /// Default: DBCompressionType::None /// /// # Example /// /// ``` /// use exonum_rocksdb::{Options, DBCompressionType}; /// /// let mut opts = Options::default(); /// opts.set_compression_type(DBCompressionType::Snappy); /// ``` pub fn set_compression_type(&mut self, t: DBCompressionType) { unsafe { ffi::rocksdb_options_set_compression(self.inner, t as c_int); } } /// Different levels can have different compression policies. There /// are cases where most lower levels would like to use quick compression /// algorithms while the higher levels (which have more data) use /// compression algorithms that have better compression but could /// 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 exonum_rocksdb::{Options, DBCompressionType}; /// /// let mut opts = Options::default(); /// opts.set_compression_per_level(&[ /// DBCompressionType::None, /// DBCompressionType::None, /// DBCompressionType::Snappy, /// DBCompressionType::Snappy, /// DBCompressionType::Snappy /// ]); /// ``` pub fn set_compression_per_level(&mut self, level_types: &[DBCompressionType]) { unsafe { let level_types: Vec<_> = level_types.iter().map(|&t| t as c_int).collect(); ffi::rocksdb_options_set_compression_per_level( self.inner, level_types.as_ptr(), level_types.len() as size_t ) } } pub fn set_merge_operator(&mut self, name: &str, merge_fn: MergeFn) { let cb = Box::new(MergeOperatorCallback { name: CString::new(name.as_bytes()).unwrap(), merge_fn: merge_fn }); unsafe { let mo = ffi::rocksdb_mergeoperator_create( mem::transmute(cb), Some(merge_operator::destructor_callback), Some(full_merge_callback), Some(partial_merge_callback), None, Some(merge_operator::name_callback) ); ffi::rocksdb_options_set_merge_operator(self.inner, mo); } } #[deprecated(since = "0.5.0", note = "add_merge_operator has been renamed to set_merge_operator")] pub fn add_merge_operator(&mut self, name: &str, merge_fn: MergeFn) { self.set_merge_operator(name, merge_fn); } /// Sets a compaction filter used to determine if entries should be kept, changed, /// or removed during compaction. /// /// An example use case is to remove entries with an expired TTL. /// /// If you take a snapshot of the database, only values written since the last /// snapshot will be passed through the compaction filter. /// /// If multi-threaded compaction is used, `filter_fn` may be called multiple times /// simultaneously. pub fn set_compaction_filter<F>(&mut self, name: &str, filter_fn: F) where F: CompactionFilterFn + Send + 'static, { let cb = Box::new(CompactionFilterCallback { name: CString::new(name.as_bytes()).unwrap(), filter_fn: filter_fn }); unsafe { let cf = ffi::rocksdb_compactionfilter_create( mem::transmute(cb), Some(compaction_filter::destructor_callback::<F>), Some(filter_callback::<F>), Some(compaction_filter::name_callback::<F>) ); ffi::rocksdb_options_set_compaction_filter(self.inner, cf); } } /// Sets the comparator used to define the order of keys in the table. /// Default: a comparator that uses lexicographic byte-wise ordering /// /// The client must ensure that the comparator supplied here has the same /// name and orders keys *exactly* the same as the comparator provided to /// previous open calls on the same DB. pub fn set_comparator(&mut self, name: &str, compare_fn: CompareFn) { let cb = Box::new(ComparatorCallback { name: CString::new(name.as_bytes()).unwrap(), f: compare_fn }); unsafe { let cmp = ffi::rocksdb_comparator_create( mem::transmute(cb), Some(comparator::destructor_callback), Some(comparator::compare_callback), Some(comparator::name_callback) ); ffi::rocksdb_options_set_comparator(self.inner, cmp); } } #[deprecated(since = "0.5.0", note = "add_comparator has been renamed to set_comparator")] pub fn add_comparator(&mut self, name: &str, compare_fn: CompareFn) { self.set_comparator(name, compare_fn); } pub fn optimize_for_point_lookup(&mut self, cache_size: u64) { unsafe { ffi::rocksdb_options_optimize_for_point_lookup(self.inner, cache_size); } } /// Sets the number of open files that can be used by the DB. You may need to /// increase this if your database has a large working set. Value `-1` means /// files opened are always kept open. You can estimate number of files based /// on target_file_size_base and target_file_size_multiplier for level-based /// compaction. For universal-style compaction, you can usually set it to `-1`. /// /// Default: `-1` /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_max_open_files(self.inner, nfiles); } } /// If true, then every store to stable storage will issue a fsync. /// 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 exonum_rocksdb::Options; /// /// let mut opts = Options::default(); /// opts.set_use_fsync(true); /// ``` pub fn set_use_fsync(&mut self, useit: bool) { unsafe { ffi::rocksdb_options_set_use_fsync(self.inner, useit as c_int) } } /// Allows OS to incrementally sync files to disk while they are being /// written, asynchronously, in the background. This operation can be used /// to smooth out write I/Os over time. Users shouldn't rely on it for /// persistency guarantee. /// Issue one request for every bytes_per_sync written. `0` turns it off. /// /// Default: `0` /// /// You may consider using rate_limiter to regulate write rate to device. /// When rate limiter is enabled, it automatically enables bytes_per_sync /// to 1MB. /// /// This option applies to table files /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_bytes_per_sync(self.inner, nbytes); } } /// Sets the number of shards used for table cache. /// /// Default: `6` /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_table_cache_numshardbits(self.inner, nbits); } } /// Sets the minimum number of write buffers that will be merged together /// before writing to storage. If set to `1`, then /// all write buffers are flushed to L0 as individual files and this increases /// read amplification because a get request has to check in all of these /// files. Also, an in-memory merge may result in writing lesser /// data to storage if there are duplicate records in each of these /// individual write buffers. /// /// Default: `1` /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_min_write_buffer_number_to_merge(self.inner, nbuf); } } /// Sets the total maximum number of write buffers to maintain in memory including /// copies of buffers that have already been flushed. Unlike /// max_write_buffer_number, this parameter does not affect flushing. /// This controls the minimum amount of write history that will be available /// in memory for conflict checking when Transactions are used. /// /// When using an OptimisticTransactionDB: /// If this value is too low, some transactions may fail at commit time due /// to not being able to determine whether there were any write conflicts. /// /// When using a TransactionDB: /// If Transaction::SetSnapshot is used, TransactionDB will read either /// in-memory write buffers or SST files to do write-conflict checking. /// Increasing this value can reduce the number of reads to SST files /// done for conflict detection. /// /// Setting this value to `0` will cause write buffers to be freed immediately /// after they are flushed. /// If this value is set to `-1`, 'max_write_buffer_number' will be used. /// /// Default: /// 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 exonum_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 { ffi::rocksdb_options_set_max_write_buffer_number(self.inner, nbuf); } } /// Sets the amount of data to build up in memory (backed by an unsorted log /// on disk) before converting to a sorted on-disk file. /// /// Larger values increase performance, especially during bulk loads. /// Up to max_write_buffer_number write buffers may be held in memory /// at the same time, /// so you may wish to adjust this parameter to control memory usage. /// Also, a larger write buffer will result in a longer recovery time /// the next time the database is opened. /// /// Note that write_buffer_size is enforced per column family. /// See db_write_buffer_size for sharing memory across column families. /// /// Default: `0x4000000` (64MiB) /// /// Dynamically changeable through SetOptions() API /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_write_buffer_size(self.inner, size); } } /// Control maximum total data size for a level. /// max_bytes_for_level_base is the max total for level-1. /// Maximum number of bytes for level L can be calculated as /// (max_bytes_for_level_base) * (max_bytes_for_level_multiplier ^ (L-1)) /// For example, if max_bytes_for_level_base is 200MB, and if /// max_bytes_for_level_multiplier is 10, total data size for level-1 /// will be 200MB, total file size for level-2 will be 2GB, /// and total file size for level-3 will be 20GB. /// /// Default: `0x10000000` (256MiB). /// /// Dynamically changeable through SetOptions() API /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_max_bytes_for_level_base(self.inner, size); } } /// Default: `10` /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_max_bytes_for_level_multiplier(self.inner, mul); } } /// The manifest file is rolled over on reaching this limit. /// The older manifest file be deleted. /// The default value is MAX_INT so that roll-over does not take place. /// /// # Example /// /// ``` /// use exonum_rocksdb::Options; /// /// let mut opts = Options::default(); /// opts.set_max_manifest_file_size(20 * 1024 * 1024); /// ``` pub fn set_max_manifest_file_size(&mut self, size: usize) { unsafe { ffi::rocksdb_options_set_max_manifest_file_size(self.inner, size); } } /// Sets the target file size for compaction. /// target_file_size_base is per-file size for level-1. /// Target file size for level L can be calculated by /// target_file_size_base * (target_file_size_multiplier ^ (L-1)) /// For example, if target_file_size_base is 2MB and /// target_file_size_multiplier is 10, then each file on level-1 will /// be 2MB, and each file on level 2 will be 20MB, /// and each file on level-3 will be 200MB. /// /// Default: `0x4000000` (64MiB) /// /// Dynamically changeable through SetOptions() API /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_target_file_size_base(self.inner, size); } } /// Sets the minimum number of write buffers that will be merged together /// before writing to storage. If set to `1`, then /// all write buffers are flushed to L0 as individual files and this increases /// read amplification because a get request has to check in all of these /// files. Also, an in-memory merge may result in writing lesser /// data to storage if there are duplicate records in each of these /// individual write buffers. /// /// Default: `1` /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_min_write_buffer_number_to_merge(self.inner, to_merge); } } /// Sets the number of files to trigger level-0 compaction. A value < `0` means that /// level-0 compaction will not be triggered by number of files at all. /// /// Default: `4` /// /// Dynamically changeable through SetOptions() API /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_level0_file_num_compaction_trigger(self.inner, n); } } /// Sets the soft limit on number of level-0 files. We start slowing down writes at this /// 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 exonum_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 { ffi::rocksdb_options_set_level0_slowdown_writes_trigger(self.inner, n); } } /// Sets the maximum number of level-0 files. We stop writes at this point. /// /// Default: `24` /// /// Dynamically changeable through SetOptions() API /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_level0_stop_writes_trigger(self.inner, n); } } /// Sets the compaction style. /// /// Default: DBCompactionStyle::Level /// /// # Example /// /// ``` /// use exonum_rocksdb::{Options, DBCompactionStyle}; /// /// let mut opts = Options::default(); /// opts.set_compaction_style(DBCompactionStyle::Universal); /// ``` pub fn set_compaction_style(&mut self, style: DBCompactionStyle) { unsafe { ffi::rocksdb_options_set_compaction_style(self.inner, style as c_int); } } /// Sets the maximum number of concurrent background compaction jobs, submitted to /// the default LOW priority thread pool. /// We first try to schedule compactions based on /// `base_background_compactions`. If the compaction cannot catch up , we /// will increase number of compaction threads up to /// `max_background_compactions`. /// /// If you're increasing this, also consider increasing number of threads in /// LOW priority thread pool. For more information, see /// Env::SetBackgroundThreads /// /// Default: `1` /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_max_background_compactions(self.inner, n); } } /// Sets the maximum number of concurrent background memtable flush jobs, submitted to /// the HIGH priority thread pool. /// /// By default, all background jobs (major compaction and memtable flush) go /// to the LOW priority pool. If this option is set to a positive number, /// memtable flush jobs will be submitted to the HIGH priority pool. /// It is important when the same Env is shared by multiple db instances. /// Without a separate pool, long running major compaction jobs could /// potentially block memtable flush jobs of other db instances, leading to /// unnecessary Put stalls. /// /// If you're increasing this, also consider increasing number of threads in /// HIGH priority thread pool. For more information, see /// Env::SetBackgroundThreads /// /// Default: `1` /// /// # Example /// /// ``` /// use exonum_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 { ffi::rocksdb_options_set_max_background_flushes(self.inner, n); } } /// Disables automatic compactions. Manual compactions can still /// be issued on this column family /// /// Default: `false` /// /// Dynamically changeable through SetOptions() API /// /// # Example /// /// ``` /// use exonum_rocksdb::Options; /// /// let mut opts = Options::default(); /// opts.set_disable_auto_compactions(true); /// ``` pub fn set_disable_auto_compactions(&mut self, disable: bool) { unsafe { ffi::rocksdb_options_set_disable_auto_compactions(self.inner, disable as c_int) } } pub fn set_block_based_table_factory(&mut self, factory: &BlockBasedOptions) { unsafe { ffi::rocksdb_options_set_block_based_table_factory(self.inner, factory.inner); } } // /// Measure IO stats in compactions and flushes, if `true`. // /// // /// Default: `false` // /// // /// # Example // /// // /// ``` // /// use exonum_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 { // ffi::rocksdb_options_set_report_bg_io_stats(self.inner, enable as c_int); // } // } // /// Recovery mode to control the consistency while replaying WAL. // /// // /// Default: DBRecoveryMode::PointInTime // /// // /// # Example // /// // /// ``` // /// use exonum_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 { // ffi::rocksdb_options_set_wal_recovery_mode(self.inner, mode as c_int); // } // } pub fn enable_statistics(&mut self) { unsafe { ffi::rocksdb_options_enable_statistics(self.inner); } } pub fn get_statistics(&self) -> Option<String> { unsafe { let value = ffi::rocksdb_options_statistics_get_string(self.inner); if value.is_null() { return None; } // Must have valid UTF-8 format. let s = CStr::from_ptr(value).to_str().unwrap().to_owned(); ffi::rocksdb_free(value as *mut c_void); Some(s) } } /// If not zero, dump `rocksdb.stats` to LOG every `stats_dump_period_sec`. /// /// Default: `600` (10 mins) /// /// # Example /// /// ``` /// use exonum_rocksdb::Options; /// /// let mut opts = Options::default(); /// opts.set_stats_dump_period_sec(300); /// ``` pub fn set_stats_dump_period_sec(&mut self, period: c_uint) { unsafe { ffi::rocksdb_options_set_stats_dump_period_sec(self.inner, period); } } /// Sets the number of levels for this database. pub fn set_num_levels(&mut self, n: c_int) { unsafe { ffi::rocksdb_options_set_num_levels(self.inner, n); } } } impl Default for Options { fn default() -> Options { unsafe { let opts = ffi::rocksdb_options_create(); if opts.is_null() { panic!("Could not create RocksDB options"); } Options { inner: opts } } } } impl WriteOptions { pub fn new() -> WriteOptions { WriteOptions::default() } pub fn set_sync(&mut self, sync: bool) { unsafe { ffi::rocksdb_writeoptions_set_sync(self.inner, sync as c_uchar); } } pub fn disable_wal(&mut self, disable: bool) { unsafe { ffi::rocksdb_writeoptions_disable_WAL(self.inner, disable as c_int); } } } impl Default for WriteOptions { fn default() -> WriteOptions { let write_opts = unsafe { ffi::rocksdb_writeoptions_create() }; if write_opts.is_null() { panic!("Could not create RocksDB write options"); } WriteOptions { inner: write_opts } } } #[cfg(test)] mod tests { use Options; #[test] fn test_enable_statistics() { let mut opts = Options::default(); opts.enable_statistics(); opts.set_stats_dump_period_sec(60); assert!(opts.get_statistics().is_some()); let opts = Options::default(); assert!(opts.get_statistics().is_none()); } }