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Yueh-Hsuan Chiang e11f676e34 Add OptionsUtil::LoadOptionsFromFile() API 
Summary:
This patch adds OptionsUtil::LoadOptionsFromFile() and
OptionsUtil::LoadLatestOptionsFromDB(), which allow developers
to construct DBOptions and ColumnFamilyOptions from a RocksDB
options file.  Note that most pointer-typed options such as
merge_operator will not be constructed.

With this API, developers no longer need to remember all the
options in order to reopen an existing rocksdb instance like
the following:

  DBOptions db_options;
  std::vector<std::string> cf_names;
  std::vector<ColumnFamilyOptions> cf_opts;

  // Load primitive-typed options from an existing DB
  OptionsUtil::LoadLatestOptionsFromDB(
      dbname, &db_options, &cf_names, &cf_opts);

  // Initialize necessary pointer-typed options
  cf_opts[0].merge_operator.reset(new MyMergeOperator());
  ...

  // Construct the vector of ColumnFamilyDescriptor
  std::vector<ColumnFamilyDescriptor> cf_descs;
  for (size_t i = 0; i < cf_opts.size(); ++i) {
    cf_descs.emplace_back(cf_names[i], cf_opts[i]);
  }

  // Open the DB
  DB* db = nullptr;
  std::vector<ColumnFamilyHandle*> cf_handles;
  auto s = DB::Open(db_options, dbname, cf_descs,
                    &handles, &db);

Test Plan:
Augment existing tests in column_family_test
options_test
db_test

Reviewers: igor, IslamAbdelRahman, sdong, anthony

Reviewed By: anthony

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D49095
 		2015-11-12 06:52:43 -08:00
..
adaptive_table_factory.cc Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
adaptive_table_factory.h Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
block.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_based_filter_block.cc bloom hit/miss stats for SST and memtable 2015-10-07 11:23:20 -07:00
block_based_filter_block.h Remember whole key/prefix filtering on/off in SST file 2015-02-11 11:20:04 -08:00
block_based_filter_block_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
block_based_table_builder.cc Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
block_based_table_builder.h Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
block_based_table_factory.cc Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
block_based_table_factory.h Add OptionsUtil::LoadOptionsFromFile() API 2015-11-12 06:52:43 -08:00
block_based_table_reader.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_based_table_reader.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_builder.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
block_builder.h delete unused Comparator 2014-09-04 09:10:13 +08:00
block_hash_index.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_hash_index.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_hash_index_test.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
block_prefix_index.cc Turn on -Wshorten-64-to-32 and fix all the errors 2014-11-11 16:47:22 -05:00
block_prefix_index.h Windows Port from Microsoft 2015-07-01 16:13:56 -07:00
block_test.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
bloom_block.cc table/bloom_block.*: pass func parameter by reference 2014-09-30 23:30:31 +02:00
bloom_block.h Enforce write buffer memory limit across column families 2014-12-02 12:09:20 -08:00
cuckoo_table_builder.cc Move rate_limiter, write buffering, most perf context instrumentation and most random kill out of Env 2015-07-17 16:58:18 -07:00
cuckoo_table_builder.h Move rate_limiter, write buffering, most perf context instrumentation and most random kill out of Env 2015-07-17 16:58:18 -07:00
cuckoo_table_builder_test.cc Block cuckoo table tests in ROCKSDB_LITE 2015-07-20 10:50:46 -07:00
cuckoo_table_factory.cc Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
cuckoo_table_factory.h Add OptionsUtil::LoadOptionsFromFile() API 2015-11-12 06:52:43 -08:00
cuckoo_table_reader.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
cuckoo_table_reader.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
cuckoo_table_reader_test.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
filter_block.h Dump routine to BlockBasedTableReader 2014-12-23 13:24:07 -08:00
flush_block_policy.cc move block based table related options BlockBasedTableOptions 2014-08-25 14:22:05 -07:00
format.cc Add ZSTD (not final format) compression type 2015-08-28 11:01:13 -07:00
format.h Move rate_limiter, write buffering, most perf context instrumentation and most random kill out of Env 2015-07-17 16:58:18 -07:00
full_filter_block.cc bloom hit/miss stats for SST and memtable 2015-10-07 11:23:20 -07:00
full_filter_block.h Remember whole key/prefix filtering on/off in SST file 2015-02-11 11:20:04 -08:00
full_filter_block_test.cc rocksdb: switch to gtest 2015-03-17 14:08:00 -07:00
get_context.cc Compaction filter on merge operands 2015-10-07 09:30:03 -07:00
get_context.h Implement a table-level row cache 2015-06-23 10:25:45 -07:00
internal_iterator.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
iter_heap.h Replace std::priority_queue in MergingIterator with custom heap, take 2 2015-07-15 03:34:40 -07:00
iterator.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
iterator_wrapper.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
merger.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
merger.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
merger_test.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
meta_blocks.cc Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
meta_blocks.h Moving memtable related files from util to a new directory memtable 2015-10-16 14:10:33 -07:00
mock_table.cc Fix MockTable ID storage 2015-10-28 10:53:14 -07:00
mock_table.h Fix MockTable ID storage 2015-10-28 10:53:14 -07:00
plain_table_builder.cc Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
plain_table_builder.h Pass column family ID to table property collector 2015-10-09 14:36:51 -07:00
plain_table_factory.cc Support PlainTableOption in option_helper 2015-10-28 23:01:33 -07:00
plain_table_factory.h Add OptionsUtil::LoadOptionsFromFile() API 2015-11-12 06:52:43 -08:00
plain_table_index.cc "make format" against last 10 commits 2015-07-13 13:50:18 -07:00
plain_table_index.h Block plain_table_index.cc in ROCKSDB_LITE 2014-11-24 20:47:27 -08:00
plain_table_key_coding.cc Fix the bug of using freed memory introduced by recent plain table reader patch 2015-09-23 16:16:26 -07:00
plain_table_key_coding.h PlainTableReader to support non-mmap mode 2015-09-23 11:41:07 -07:00
plain_table_reader.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
plain_table_reader.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
scoped_arena_iterator.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
sst_file_writer.cc Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
table_builder.h Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
table_properties.cc Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
table_properties_internal.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
table_reader.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
table_reader_bench.cc Move skip_table_builder_flush to BlockBasedTableOption 2015-10-30 18:33:01 -07:00
table_test.cc Revert "Adding new table properties" 2015-11-06 16:49:38 -08:00
two_level_iterator.cc Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00
two_level_iterator.h Seperate InternalIterator from Iterator 2015-10-13 15:32:13 -07:00