[RocksDB] cleanup EnvOptions

Summary:
This diff simplifies EnvOptions by treating it as POD, similar to Options.
- virtual functions are removed and member fields are accessed directly.
- StorageOptions is removed.
- Options.allow_readahead and Options.allow_readahead_compactions are deprecated.
- Unused global variables are removed: useOsBuffer, useFsReadAhead, useMmapRead, useMmapWrite

Test Plan: make check; db_stress

Reviewers: dhruba

CC: leveldb

Differential Revision: https://reviews.facebook.net/D11175
This commit is contained in:
Haobo Xu
2013-06-07 15:35:17 -07:00
parent 5679107b07
commit bdf1085944
24 changed files with 103 additions and 180 deletions

View File

@@ -26,7 +26,7 @@ static void UnrefEntry(void* arg1, void* arg2) {
TableCache::TableCache(const std::string& dbname,
const Options* options,
const StorageOptions& storage_options,
const EnvOptions& storage_options,
int entries)
: env_(options->env),
dbname_(dbname),