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Expose the table properties to application

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Summary: Provide a public API for users to access the table properties for each SSTable.

Test Plan: Added a unit tests to test the function correctness under differnet conditions.

Reviewers: haobo, dhruba, sdong

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D16083
This commit is contained in:
kailiu
2014-02-13 16:28:21 -08:00
parent b2e7ee8b41
commit 63690625cd
12 changed files with 272 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
include/rocksdb/db.h
View File

@@ -13,6 +13,7 @@
#include <stdio.h>
#include <memory>
#include <vector>
#include <unordered_map>
#include "rocksdb/iterator.h"
#include "rocksdb/options.h"
#include "rocksdb/types.h"
@@ -30,6 +31,7 @@ struct Options;
struct ReadOptions;
struct WriteOptions;
struct FlushOptions;
struct TableProperties;
class WriteBatch;
class Env;
@@ -61,6 +63,12 @@ struct Range {
Range(const Slice& s, const Slice& l) : start(s), limit(l) { }
};
// A collections of table properties objects, where
// key: is the table's file name.
// value: the table properties object of the given table.
typedef std::unordered_map<std::string, std::shared_ptr<const TableProperties>>
TablePropertiesCollection;
// A DB is a persistent ordered map from keys to values.
// A DB is safe for concurrent access from multiple threads without
// any external synchronization.
@@ -309,6 +317,8 @@ class DB {
// be set properly
virtual Status GetDbIdentity(std::string& identity) = 0;
virtual Status GetPropertiesOfAllTables(TablePropertiesCollection* props) = 0;
private:
// No copying allowed
DB(const DB&);

127
include/rocksdb/statistics.h
View File

@@ -57,9 +57,9 @@ enum Tickers {
* COMPACTION_KEY_DROP_* count the reasons for key drop during compaction
* There are 3 reasons currently.
*/
COMPACTION_KEY_DROP_NEWER_ENTRY, // key was written with a newer value.
COMPACTION_KEY_DROP_OBSOLETE, // The key is obsolete.
COMPACTION_KEY_DROP_USER, // user compaction function has dropped the key.
COMPACTION_KEY_DROP_NEWER_ENTRY, // key was written with a newer value.
COMPACTION_KEY_DROP_OBSOLETE, // The key is obsolete.
COMPACTION_KEY_DROP_USER, // user compaction function has dropped the key.
// Number of keys written to the database via the Put and Write call's
NUMBER_KEYS_WRITTEN,
@@ -80,8 +80,7 @@ enum Tickers {
// write throttle because of too many files in L0
STALL_L0_NUM_FILES_MICROS,
RATE_LIMIT_DELAY_MILLIS,
NO_ITERATORS, // number of iterators currently open
NO_ITERATORS, // number of iterators currently open
// Number of MultiGet calls, keys read, and bytes read
NUMBER_MULTIGET_CALLS,
@@ -107,77 +106,77 @@ enum Tickers {
// Record the number of calls to GetUpadtesSince. Useful to keep track of
// transaction log iterator refreshes
GET_UPDATES_SINCE_CALLS,
BLOCK_CACHE_COMPRESSED_MISS, // miss in the compressed block cache
BLOCK_CACHE_COMPRESSED_HIT, // hit in the compressed block cache
WAL_FILE_SYNCED, // Number of times WAL sync is done
WAL_FILE_BYTES, // Number of bytes written to WAL
BLOCK_CACHE_COMPRESSED_MISS, // miss in the compressed block cache
BLOCK_CACHE_COMPRESSED_HIT, // hit in the compressed block cache
WAL_FILE_SYNCED, // Number of times WAL sync is done
WAL_FILE_BYTES, // Number of bytes written to WAL
// Writes can be processed by requesting thread or by the thread at the
// head of the writers queue.
WRITE_DONE_BY_SELF,
WRITE_DONE_BY_OTHER,
WRITE_WITH_WAL, // Number of Write calls that request WAL
COMPACT_READ_BYTES, // Bytes read during compaction
COMPACT_WRITE_BYTES, // Bytes written during compaction
WRITE_WITH_WAL, // Number of Write calls that request WAL
COMPACT_READ_BYTES, // Bytes read during compaction
COMPACT_WRITE_BYTES, // Bytes written during compaction
// Number of table's properties loaded directly from file, without creating
// table reader object.
NUMBER_DIRECT_LOAD_TABLE_PROPERTIES,
TICKER_ENUM_MAX
};
// The order of items listed in Tickers should be the same as
// the order listed in TickersNameMap
const std::vector<std::pair<Tickers, std::string>> TickersNameMap = {
{ BLOCK_CACHE_MISS, "rocksdb.block.cache.miss" },
{ BLOCK_CACHE_HIT, "rocksdb.block.cache.hit" },
{ BLOCK_CACHE_ADD, "rocksdb.block.cache.add" },
{ BLOCK_CACHE_INDEX_MISS, "rocksdb.block.cache.index.miss" },
{ BLOCK_CACHE_INDEX_HIT, "rocksdb.block.cache.index.hit" },
{ BLOCK_CACHE_FILTER_MISS, "rocksdb.block.cache.filter.miss" },
{ BLOCK_CACHE_FILTER_HIT, "rocksdb.block.cache.filter.hit" },
{ BLOCK_CACHE_DATA_MISS, "rocksdb.block.cache.data.miss" },
{ BLOCK_CACHE_DATA_HIT, "rocksdb.block.cache.data.hit" },
{ BLOOM_FILTER_USEFUL, "rocksdb.bloom.filter.useful" },
{ MEMTABLE_HIT, "rocksdb.memtable.hit" },
{ MEMTABLE_MISS, "rocksdb.memtable.miss" },
{ COMPACTION_KEY_DROP_NEWER_ENTRY, "rocksdb.compaction.key.drop.new" },
{ COMPACTION_KEY_DROP_OBSOLETE, "rocksdb.compaction.key.drop.obsolete" },
{ COMPACTION_KEY_DROP_USER, "rocksdb.compaction.key.drop.user" },
{ NUMBER_KEYS_WRITTEN, "rocksdb.number.keys.written" },
{ NUMBER_KEYS_READ, "rocksdb.number.keys.read" },
{ NUMBER_KEYS_UPDATED, "rocksdb.number.keys.updated" },
{ BYTES_WRITTEN, "rocksdb.bytes.written" },
{ BYTES_READ, "rocksdb.bytes.read" },
{ NO_FILE_CLOSES, "rocksdb.no.file.closes" },
{ NO_FILE_OPENS, "rocksdb.no.file.opens" },
{ NO_FILE_ERRORS, "rocksdb.no.file.errors" },
{ STALL_L0_SLOWDOWN_MICROS, "rocksdb.l0.slowdown.micros" },
{ STALL_MEMTABLE_COMPACTION_MICROS, "rocksdb.memtable.compaction.micros" },
{ STALL_L0_NUM_FILES_MICROS, "rocksdb.l0.num.files.stall.micros" },
{ RATE_LIMIT_DELAY_MILLIS, "rocksdb.rate.limit.delay.millis" },
{ NO_ITERATORS, "rocksdb.num.iterators" },
{ NUMBER_MULTIGET_CALLS, "rocksdb.number.multiget.get" },
{ NUMBER_MULTIGET_KEYS_READ, "rocksdb.number.multiget.keys.read" },
{ NUMBER_MULTIGET_BYTES_READ, "rocksdb.number.multiget.bytes.read" },
{ NUMBER_FILTERED_DELETES, "rocksdb.number.deletes.filtered" },
{ NUMBER_MERGE_FAILURES, "rocksdb.number.merge.failures" },
{ SEQUENCE_NUMBER, "rocksdb.sequence.number" },
{ BLOOM_FILTER_PREFIX_CHECKED, "rocksdb.bloom.filter.prefix.checked" },
{ BLOOM_FILTER_PREFIX_USEFUL, "rocksdb.bloom.filter.prefix.useful" },
{ NUMBER_OF_RESEEKS_IN_ITERATION, "rocksdb.number.reseeks.iteration" },
{ GET_UPDATES_SINCE_CALLS, "rocksdb.getupdatessince.calls" },
{ BLOCK_CACHE_COMPRESSED_MISS, "rocksdb.block.cachecompressed.miss" },
{ BLOCK_CACHE_COMPRESSED_HIT, "rocksdb.block.cachecompressed.hit" },
{ WAL_FILE_SYNCED, "rocksdb.wal.synced" },
{ WAL_FILE_BYTES, "rocksdb.wal.bytes" },
{ WRITE_DONE_BY_SELF, "rocksdb.write.self" },
{ WRITE_DONE_BY_OTHER, "rocksdb.write.other" },
{ WRITE_WITH_WAL, "rocksdb.write.wal" },
{ COMPACT_READ_BYTES, "rocksdb.compact.read.bytes" },
{ COMPACT_WRITE_BYTES, "rocksdb.compact.write.bytes" },
};
{BLOCK_CACHE_MISS, "rocksdb.block.cache.miss"},
{BLOCK_CACHE_HIT, "rocksdb.block.cache.hit"},
{BLOCK_CACHE_ADD, "rocksdb.block.cache.add"},
{BLOCK_CACHE_INDEX_MISS, "rocksdb.block.cache.index.miss"},
{BLOCK_CACHE_INDEX_HIT, "rocksdb.block.cache.index.hit"},
{BLOCK_CACHE_FILTER_MISS, "rocksdb.block.cache.filter.miss"},
{BLOCK_CACHE_FILTER_HIT, "rocksdb.block.cache.filter.hit"},
{BLOCK_CACHE_DATA_MISS, "rocksdb.block.cache.data.miss"},
{BLOCK_CACHE_DATA_HIT, "rocksdb.block.cache.data.hit"},
{BLOOM_FILTER_USEFUL, "rocksdb.bloom.filter.useful"},
{MEMTABLE_HIT, "rocksdb.memtable.hit"},
{MEMTABLE_MISS, "rocksdb.memtable.miss"},
{COMPACTION_KEY_DROP_NEWER_ENTRY, "rocksdb.compaction.key.drop.new"},
{COMPACTION_KEY_DROP_OBSOLETE, "rocksdb.compaction.key.drop.obsolete"},
{COMPACTION_KEY_DROP_USER, "rocksdb.compaction.key.drop.user"},
{NUMBER_KEYS_WRITTEN, "rocksdb.number.keys.written"},
{NUMBER_KEYS_READ, "rocksdb.number.keys.read"},
{NUMBER_KEYS_UPDATED, "rocksdb.number.keys.updated"},
{BYTES_WRITTEN, "rocksdb.bytes.written"},
{BYTES_READ, "rocksdb.bytes.read"},
{NO_FILE_CLOSES, "rocksdb.no.file.closes"},
{NO_FILE_OPENS, "rocksdb.no.file.opens"},
{NO_FILE_ERRORS, "rocksdb.no.file.errors"},
{STALL_L0_SLOWDOWN_MICROS, "rocksdb.l0.slowdown.micros"},
{STALL_MEMTABLE_COMPACTION_MICROS, "rocksdb.memtable.compaction.micros"},
{STALL_L0_NUM_FILES_MICROS, "rocksdb.l0.num.files.stall.micros"},
{RATE_LIMIT_DELAY_MILLIS, "rocksdb.rate.limit.delay.millis"},
{NO_ITERATORS, "rocksdb.num.iterators"},
{NUMBER_MULTIGET_CALLS, "rocksdb.number.multiget.get"},
{NUMBER_MULTIGET_KEYS_READ, "rocksdb.number.multiget.keys.read"},
{NUMBER_MULTIGET_BYTES_READ, "rocksdb.number.multiget.bytes.read"},
{NUMBER_FILTERED_DELETES, "rocksdb.number.deletes.filtered"},
{NUMBER_MERGE_FAILURES, "rocksdb.number.merge.failures"},
{SEQUENCE_NUMBER, "rocksdb.sequence.number"},
{BLOOM_FILTER_PREFIX_CHECKED, "rocksdb.bloom.filter.prefix.checked"},
{BLOOM_FILTER_PREFIX_USEFUL, "rocksdb.bloom.filter.prefix.useful"},
{NUMBER_OF_RESEEKS_IN_ITERATION, "rocksdb.number.reseeks.iteration"},
{GET_UPDATES_SINCE_CALLS, "rocksdb.getupdatessince.calls"},
{BLOCK_CACHE_COMPRESSED_MISS, "rocksdb.block.cachecompressed.miss"},
{BLOCK_CACHE_COMPRESSED_HIT, "rocksdb.block.cachecompressed.hit"},
{WAL_FILE_SYNCED, "rocksdb.wal.synced"},
{WAL_FILE_BYTES, "rocksdb.wal.bytes"},
{WRITE_DONE_BY_SELF, "rocksdb.write.self"},
{WRITE_DONE_BY_OTHER, "rocksdb.write.other"},
{WRITE_WITH_WAL, "rocksdb.write.wal"},
{COMPACT_READ_BYTES, "rocksdb.compact.read.bytes"},
{COMPACT_WRITE_BYTES, "rocksdb.compact.write.bytes"},
{NUMBER_DIRECT_LOAD_TABLE_PROPERTIES,
"rocksdb.number.direct.load.table.properties"}, };
/**
* Keep adding histogram's here.