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7fdd5f5b33
rocksdb/db
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Abhishek Kona 7fdd5f5b33 Use non-mmapd files for Write-Ahead Files 
Summary:
Use non mmapd files for Write-Ahead log.
Earlier use of MMaped files. made the log iterator read ahead and miss records.
Now the reader and writer will point to the same physical location.

There is no perf regression :
./db_bench --benchmarks=fillseq --db=/dev/shm/mmap_test --num=$(million 20) --use_existing_db=0 --threads=2
with This diff :
fillseq      :      10.756 micros/op 185281 ops/sec;   20.5 MB/s
without this dif :
fillseq      :      11.085 micros/op 179676 ops/sec;   19.9 MB/s

Test Plan: unit test included

Reviewers: dhruba, heyongqiang

Reviewed By: heyongqiang

CC: leveldb

Differential Revision: https://reviews.facebook.net/D9741
2013-03-28 13:13:35 -07:00
..
.nfs00000000066c9ebb00000002 Enhance db_bench 2013-03-14 16:00:23 -07:00
builder.cc Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
builder.h Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
c_test.c Fix poor error on num_levels mismatch and few other minor improvements 2013-01-25 15:37:26 -08:00
c.cc Fix poor error on num_levels mismatch and few other minor improvements 2013-01-25 15:37:26 -08:00
corruption_test.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
db_bench.cc memory manage statistics 2013-03-27 11:27:39 -07:00
db_filesnapshot.cc Fix all the lint errors. 2012-11-28 17:18:41 -08:00
db_impl_readonly.cc Fix for the weird behaviour encountered by ldb Get where it could read only the second-latest value 2013-02-20 10:45:52 -08:00
db_impl_readonly.h Add a readonly db 2012-11-07 14:19:48 -08:00
db_impl.cc Use non-mmapd files for Write-Ahead Files 2013-03-28 13:13:35 -07:00
db_impl.h Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
db_iter.cc A number of fixes: 2011-10-31 17:22:06 +00:00
db_iter.h A number of fixes: 2011-10-31 17:22:06 +00:00
db_statistics.h Refactor statistics. Remove individual functions like incNumFileOpens 2013-02-25 13:58:34 -08:00
db_stats_logger.cc remove boost 2012-09-16 19:33:43 -07:00
db_test.cc Use non-mmapd files for Write-Ahead Files 2013-03-28 13:13:35 -07:00
dbformat_test.cc Fix all warnings generated by -Wall option to the compiler. 2012-11-06 14:07:31 -08:00
dbformat.cc manifest_dump: Add --hex=1 option 2012-12-16 08:58:28 -08:00
dbformat.h Fox db_stress crash by copying keys before changing sequencenum to zero. 2013-03-06 10:52:08 -08:00
filename_test.cc Added meta-database support. 2012-12-17 11:26:59 -08:00
filename.cc Allow the logs to be purged by TTL. 2013-02-04 19:42:40 -08:00
filename.h Added meta-database support. 2012-12-17 11:26:59 -08:00
log_file.h GetUpdatesSince API to enable replication. 2012-12-07 11:42:13 -08:00
log_format.h Fixed sign-comparison in rocksdb code-base and fixed Makefile 2013-03-19 14:35:23 -07:00
log_reader.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
log_reader.h TransactionLogIter should stall at the last record. Currently it errors out 2013-03-21 15:12:35 -07:00
log_test.cc Fix more signed-unsigned comparisons 2013-03-19 17:21:36 -07:00
log_writer.cc Fix a number of object lifetime/ownership issues 2013-01-23 16:54:11 -08:00
log_writer.h Fix a number of object lifetime/ownership issues 2013-01-23 16:54:11 -08:00
memtable.cc Ability for rocksdb to compact when flushing the in-memory memtable to a file in L0. 2013-03-04 00:01:47 -08:00
memtable.h Ability for rocksdb to compact when flushing the in-memory memtable to a file in L0. 2013-03-04 00:01:47 -08:00
memtablelist.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
memtablelist.h Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
repair.cc Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
skiplist_test.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
skiplist.h Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
snapshot.h Ability for rocksdb to compact when flushing the in-memory memtable to a file in L0. 2013-03-04 00:01:47 -08:00
table_cache.cc memory manage statistics 2013-03-27 11:27:39 -07:00
table_cache.h Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
transaction_log_iterator_impl.cc Disable Unit Test for TransactionLogIteratorStall 2013-03-21 15:51:18 -07:00
transaction_log_iterator_impl.h Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
version_edit_test.cc Make some variables configurable for each db instance 2012-06-27 14:36:31 -07:00
version_edit.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
version_edit.h Fix poor error on num_levels mismatch and few other minor improvements 2013-01-25 15:37:26 -08:00
version_set_reduce_num_levels.cc Fix valgrind errors in rocksdb tests: auto_roll_logger_test, reduce_levels_test 2013-03-12 16:03:16 -07:00
version_set_test.cc Codemod NULL to nullptr 2013-02-28 18:04:58 -08:00
version_set.cc Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
version_set.h Ability to configure bufferedio-reads, filesystem-readaheads and mmap-read-write per database. 2013-03-20 23:14:03 -07:00
write_batch_internal.h GetUpdatesSince API to enable replication. 2012-12-07 11:42:13 -08:00
write_batch_test.cc Fix all warnings generated by -Wall option to the compiler. 2012-11-06 14:07:31 -08:00
write_batch.cc added group commit; drastically speeds up mult-threaded synchronous write workloads 2012-03-08 16:23:21 -08:00