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Extract alignments to options

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This commit is contained in:
Vitaliy Filippov
2020-01-16 00:54:25 +03:00
parent 57ecbb2cda
commit 43f6cfeb73
16 changed files with 274 additions and 263 deletions
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blockstore_impl.h
+36 -24
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@@ -26,16 +26,6 @@
// Memory alignment for direct I/O (usually 512 bytes)
// All other alignments must be a multiple of this one
#define MEM_ALIGNMENT 512
// FIXME: Make following constants configurable
// Required write alignment and journal/metadata/data areas' location alignment
#define DISK_ALIGNMENT 512
// Journal block size - minimum_io_size of the journal device is the best choice
#define JOURNAL_BLOCK_SIZE 512
// Metadata block size - minimum_io_size of the metadata device is the best choice
#define META_BLOCK_SIZE 512
// Sparse write tracking granularity. 4 KB is a good choice. Must be a multiple
// of the write alignment.
#define BITMAP_GRANULARITY 4096
// States are not stored on disk. Instead, they're deduced from the journal
@@ -181,8 +171,36 @@ struct blockstore_op_private_t
#include "blockstore_flush.h"
struct blockstore_params_t
{
uint32_t block_size;
};
class blockstore_impl_t
{
/******* OPTIONS *******/
std::string data_device, meta_device, journal_device;
uint32_t block_size;
uint64_t meta_offset;
uint64_t data_offset;
uint64_t cfg_journal_size;
// Required write alignment and journal/metadata/data areas' location alignment
uint64_t disk_alignment = 512;
// Journal block size - minimum_io_size of the journal device is the best choice
uint64_t journal_block_size = 512;
// Metadata block size - minimum_io_size of the metadata device is the best choice
uint64_t meta_block_size = 512;
// Sparse write tracking granularity. 4 KB is a good choice. Must be a multiple of disk_alignment
uint64_t bitmap_granularity = 4096;
bool readonly = false;
// FIXME: separate flags for data, metadata and journal
// It is safe to disable fsync() if drive write cache is writethrough
bool disable_fsync = false;
bool inmemory_meta = false;
int flusher_count;
/******* END OF OPTIONS *******/
struct ring_consumer_t ring_consumer;
// Another option is https://github.com/algorithm-ninja/cpp-btree
@@ -195,21 +213,15 @@ class blockstore_impl_t
allocator *data_alloc = NULL;
uint8_t *zero_object;
uint32_t block_order;
uint64_t block_count;
uint32_t block_order, block_size;
uint32_t clean_entry_bitmap_size = 0, clean_entry_size = 0;
int meta_fd;
int data_fd;
uint64_t meta_size, meta_area, meta_len;
uint64_t data_size, data_len;
uint64_t meta_offset, meta_size, meta_area, meta_len;
uint64_t data_offset, data_size, data_len;
bool readonly = false;
// FIXME: separate flags for data, metadata and journal
// It is safe to disable fsync() if drive write cache is writethrough
bool disable_fsync = false;
bool inmemory_meta = false;
void *metadata_buffer = NULL;
struct journal_t journal;
@@ -231,10 +243,11 @@ class blockstore_impl_t
friend class journal_flusher_t;
friend class journal_flusher_co;
void calc_lengths(blockstore_config_t & config);
void open_data(blockstore_config_t & config);
void open_meta(blockstore_config_t & config);
void open_journal(blockstore_config_t & config);
void parse_config(blockstore_config_t & config);
void calc_lengths();
void open_data();
void open_meta();
void open_journal();
// Asynchronous init
int initialized;
@@ -302,6 +315,5 @@ public:
std::map<object_id, uint64_t> unstable_writes;
inline uint32_t get_block_size() { return block_size; }
inline uint32_t get_block_order() { return block_order; }
inline uint64_t get_block_count() { return block_count; }
};