62 const size_t kDefaultPageSize = 4 * 1024;
122   size_t compaction_readahead_size = 0;
125   size_t random_access_max_buffer_size = 0;
128   size_t writable_file_max_buffer_size = 1024 * 1024;
304   virtual Status Truncate(const std::string& /*fname*/, size_t /*size*/) {  in Truncate()  argument
579   virtual Status Read(size_t n, Slice* result, char* scratch) = 0;
596   virtual size_t GetRequiredBufferAlignment() const { return kDefaultPageSize; }  in GetRequiredBufferAlignment()
601   virtual Status InvalidateCache(size_t /*offset*/, size_t /*length*/) {  in InvalidateCache()  argument
607   virtual Status PositionedRead(uint64_t /*offset*/, size_t /*n*/,  in PositionedRead()  argument
622   size_t len;
652   virtual Status Read(uint64_t offset, size_t n, Slice* result,
656   virtual Status Prefetch(uint64_t /*offset*/, size_t /*n*/) {  in Prefetch()  argument
667   virtual Status MultiRead(ReadRequest* reqs, size_t num_reqs) {  in MultiRead()
669     for (size_t i = 0; i < num_reqs; ++i) {  in MultiRead()
691   virtual size_t GetUniqueId(char* /*id*/, size_t /*max_size*/) const {  in GetUniqueId()  argument
706   virtual size_t GetRequiredBufferAlignment() const { return kDefaultPageSize; }  in GetRequiredBufferAlignment()
711   virtual Status InvalidateCache(size_t /*offset*/, size_t /*length*/) {  in InvalidateCache()  argument
800   virtual size_t GetRequiredBufferAlignment() const { return kDefaultPageSize; }  in GetRequiredBufferAlignment()
825   virtual void SetPreallocationBlockSize(size_t size) {  in SetPreallocationBlockSize()
829   virtual void GetPreallocationStatus(size_t* block_size,  in GetPreallocationStatus()
830                                       size_t* last_allocated_block) {  in GetPreallocationStatus()
836   virtual size_t GetUniqueId(char* /*id*/, size_t /*max_size*/) const {  in GetUniqueId()  argument
844   virtual Status InvalidateCache(size_t /*offset*/, size_t /*length*/) {  in InvalidateCache()  argument
866   virtual void PrepareWrite(size_t offset, size_t len) {  in PrepareWrite()
874     size_t new_last_preallocated_block =  in PrepareWrite()
877       size_t num_spanned_blocks =  in PrepareWrite()
894   size_t preallocation_block_size() { return preallocation_block_size_; }  in preallocation_block_size()
897   size_t last_preallocated_block_;
898   size_t preallocation_block_size_;
922   virtual size_t GetRequiredBufferAlignment() const { return kDefaultPageSize; }  in GetRequiredBufferAlignment()
931   virtual Status Read(uint64_t offset, size_t n, Slice* result,
950   MemoryMappedFileBuffer(void* _base, size_t _length)  in MemoryMappedFileBuffer()
961   size_t GetLen() const { return length_; }  in GetLen()
965   const size_t length_;
976   virtual size_t GetUniqueId(char* /*id*/, size_t /*max_size*/) const {  in GetUniqueId()  argument
997   size_t kDoNotSupportGetLogFileSize = (std::numeric_limits<size_t>::max)();
1031   virtual size_t GetLogFileSize() const { return kDoNotSupportGetLogFileSize; }  in GetLogFileSize()
1238   Status Truncate(const std::string& fname, size_t size) override {  in Truncate()
1409   Status Read(size_t n, Slice* result, char* scratch) override {  in Read()
1414   size_t GetRequiredBufferAlignment() const override {  in GetRequiredBufferAlignment()
1417   Status InvalidateCache(size_t offset, size_t length) override {  in InvalidateCache()
1420   Status PositionedRead(uint64_t offset, size_t n, Slice* result,  in PositionedRead()
1434   Status Read(uint64_t offset, size_t n, Slice* result,  in Read()
1438   Status MultiRead(ReadRequest* reqs, size_t num_reqs) override {  in MultiRead()
1441   Status Prefetch(uint64_t offset, size_t n) override {  in Prefetch()
1444   size_t GetUniqueId(char* id, size_t max_size) const override {  in GetUniqueId()
1449   size_t GetRequiredBufferAlignment() const override {  in GetRequiredBufferAlignment()
1452   Status InvalidateCache(size_t offset, size_t length) override {  in InvalidateCache()
1477   size_t GetRequiredBufferAlignment() const override {  in GetRequiredBufferAlignment()
1497   void SetPreallocationBlockSize(size_t size) override {  in SetPreallocationBlockSize()
1501   void GetPreallocationStatus(size_t* block_size,  in GetPreallocationStatus()
1502                               size_t* last_allocated_block) override {  in GetPreallocationStatus()
1506   size_t GetUniqueId(char* id, size_t max_size) const override {  in GetUniqueId()
1510   Status InvalidateCache(size_t offset, size_t length) override {  in InvalidateCache()
1518   void PrepareWrite(size_t offset, size_t len) override {  in PrepareWrite()
1535   size_t GetRequiredBufferAlignment() const override {  in GetRequiredBufferAlignment()
1541   Status Read(uint64_t offset, size_t n, Slice* result,  in Read()
1559   size_t GetUniqueId(char* id, size_t max_size) const override {  in GetUniqueId()
1582   size_t GetLogFileSize() const override { return target_->GetLogFileSize(); }  in GetLogFileSize()