returns;}StatusFlushJob::WriteLevel0Table(){// 略{// 略// memtables and range_del_iters store internal iterators over each data// memtable and its associated range deletion memtable, respectively, at// corresponding indexes.
TerarkDB 自身的前后台 IO 互相争抢，也是另一个关键问题，举个例子，如果在高负载业务中（或者 IO St...
size_t batch_cnt; // if non-zero, number of sub-batches in the write batch size_t protection_bytes_per_key; PreReleaseCallback* pre_release_callback; PostMemTableCallback* post_memtable_callback; uint64_t log_used; // log number that this batch was inserted into uint64_t log_ref;...
Add an option memtable_insert_hint_per_batch to WriteOptions. If it is true, each WriteBatch will maintain its own insert hints for each memtable in concurrent write. See include/rocksdb/options.h for more details. Public API Change Added max_write_buffer_size_to_maintain option to better...
Add an option memtable_insert_hint_per_batch to WriteOptions. If it is true, each WriteBatch will maintain its own insert hints for each memtable in concurrent write. See include/rocksdb/options.h for more details. Public API Change Added max_write_buffer_size_to_maintain option to better...
allow_concurrent_memtable_write 从名字就可以看出来这个配置项打开(5.0.1之前默认是关闭)之后可以并发写memtable,我们知道rocksdb是single writer的实现,之前也说过writebatch的作用,和leveldb一样,所有的writer进行排队,每次只有队头的writer可写,其他writer等待,队头writer将自己和后面的一些writer的writebatch合并成一...
rocksdb::BlockBasedTableOptions bbto; bbto.filter_policy.reset(rocksdb::NewBloomFilterPolicy(10/*bits_per_key*/,false/*use_block_based_builder*/)); options.table_factory.reset(rocksdb::NewBlockBasedTableFactory(bbto)); rocksdb::DB* db;rocksdb::DB::Open(options,"/tmp/testdb", &db)...
SkipListRep::InsertKey是,lsm的内存部分执行的内容,所以把这个作为一个入口设置一个端点,后续展开分析一下。 Thread36"db_bench"hit Breakpoint3,rocksdb::(anonymous namespace)::SkipListRep::InsertKey(this=0xce65a0,handle=0xce5278)at memtable/skiplistrep.cc:4646returnskip_list_.Insert(static_cast<ch...
Add an option memtable_insert_hint_per_batch to WriteOptions. If it is true, each WriteBatch will maintain its own insert hints for each memtable in concurrent write. See include/rocksdb/options.h for more details. Public API Change Added max_write_buffer_size_to_maintain option to better...
true/*concurrent_memtable_writes*/,seq_per_batch_,w.batch_cnt,batch_per_txn_,write_options.memtable_insert_hint_per_batch);PERF_TIMER_START(write_pre_and_post_process_time);}//判断自己是否是最后一个写入memtable的线程,如果是则需要做最后的处理//设置last seq、选出下一个正在等待的线程中的...