2024/08/20-07:31:26.964639 140500204496448 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00: fork to child time = 0.042616 sec 2024/08/20-07:31:26.965615 140500204496448 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00 2024/08/20-07:31:26.970579 140500204496448 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00 2024/08/20-07:31:26.972005 140500204496448 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-07:31:26.972399 140500204496448 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-07:31:27.022235 140500204496448 [version_set.cc:6139] Recovering from manifest file: /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-15756/att-00/MANIFEST-14629260 2024/08/20-07:31:27.036796 140500204496448 [version_set.cc:6182] Recovered from manifest file:/worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-15756/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14647147, last_sequence is 190188565172, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14647112 2024/08/20-07:31:27.036804 140500204496448 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-07:31:27.036867 140500204496448 [version_set.cc:5652] Creating manifest 14647147 2024/08/20-07:31:27.070086 140500204496448 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-07:31:27.088825 140500204496448 [compaction_job.cc:2433] [default] [JOB 15756] Compacting 1@2 + 2@3 files to L3, score 0.96, subcompactions 1 : 1 2024/08/20-07:31:27.088844 140500204496448 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 8080 Base level 2, inputs: [14647127(20MB)], [14647081(97MB) 14647082(67MB)] 2024/08/20-07:31:27.335306 140500204496448 [top_zip_table.cc:59] core git_version_hash_info_is:commit 7517bad5c1a147474c3830831b9a22c996321ae8 Author: leipeng Date: 2024-01-08 19:18:17 +0800 vfork_cmd: call close before wait_finish g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. INCS = -Isrc -I3rdparty/re2 -I3rdparty/zstd -Iboost-include CXXFLAGS = -D TOPLING_IO_WITH_URING=1 -fPIC -time -Wno-class-memaccess -fdiagnostics-color -Wformat=2 -Wcomment -Wall -Wextra -Wno-unused-parameter -Wno-alloc-size-larger-than -mcx16 -Wno-deprecated-declarations -Wstrict-aliasing=3 -DCLIENT_LICENSE_ID="public" -DNO_THREADS -ftls-model=initial-exec -DDIVSUFSORT_API= -fno-stack-protector RLS_FLAGS = -O3 -DNDEBUG -g3 WITH_BMI2 = 1 compile_cpu_flag: -march=haswell -mbmi -mbmi2 2024/08/20-07:31:27.335330 140500204496448 [top_zip_table.cc:60] fsa git_version_hash_info_is:commit 7517bad5c1a147474c3830831b9a22c996321ae8 Author: leipeng Date: 2024-01-08 19:18:17 +0800 vfork_cmd: call close before wait_finish g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. INCS = -Isrc -I3rdparty/re2 -I3rdparty/zstd -Iboost-include CXXFLAGS = -D TOPLING_IO_WITH_URING=1 -fPIC -time -Wno-class-memaccess -fdiagnostics-color -Wformat=2 -Wcomment -Wall -Wextra -Wno-unused-parameter -Wno-alloc-size-larger-than -mcx16 -Wno-deprecated-declarations -Wstrict-aliasing=3 -DCLIENT_LICENSE_ID="public" -DNO_THREADS -ftls-model=initial-exec -DDIVSUFSORT_API= -fno-stack-protector RLS_FLAGS = -O3 -DNDEBUG -g3 WITH_BMI2 = 1 compile_cpu_flag: -march=haswell -mbmi -mbmi2 2024/08/20-07:31:27.335353 140500204496448 [top_zip_table.cc:61] zbs git_version_hash_info_is:commit 7517bad5c1a147474c3830831b9a22c996321ae8 Author: leipeng Date: 2024-01-08 19:18:17 +0800 vfork_cmd: call close before wait_finish g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. INCS = -Isrc -I3rdparty/re2 -I3rdparty/zstd -Iboost-include CXXFLAGS = -D TOPLING_IO_WITH_URING=1 -fPIC -time -Wno-class-memaccess -fdiagnostics-color -Wformat=2 -Wcomment -Wall -Wextra -Wno-unused-parameter -Wno-alloc-size-larger-than -mcx16 -Wno-deprecated-declarations -Wstrict-aliasing=3 -DCLIENT_LICENSE_ID="public" -DNO_THREADS -ftls-model=initial-exec -DDIVSUFSORT_API= -fno-stack-protector RLS_FLAGS = -O3 -DNDEBUG -g3 WITH_BMI2 = 1 compile_cpu_flag: -march=haswell -mbmi -mbmi2 2024/08/20-07:31:27.335366 140500204496448 [top_zip_table.cc:62] topling-zip_table_reader: git_version_hash_info_is: commit 7f80399bfbd2071b6e0f5683e8ab7225b8e6e394 Author: leipeng Date: 2024-01-19 14:52:30 +0800 Change ToplingZipTableOptions::sampleRatio to vector g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. cpu_flag: -march=native -mbmi -mbmi2 2024/08/20-07:31:27.335377 140500204496448 [top_zip_table.cc:64] topling-rocks git_version_hash_info_is: commit 1240987ca13d0fe562c9b9c037155079f0877840 Author: leipeng Date: 2024-01-19 15:07:04 +0800 Change ToplingZipTableOptions::sampleRatio to vector g++ (GCC) 12.1.0 Copyright (C) 2022 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. cpu_flag: -march=native -mbmi -mbmi2 2024/08/20-07:31:28.079086 140500204496448 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647148.sst) /dev/shm/ToplingTemp/Topling-240162-JNogu6 2024/08/20-07:31:28.526163 140500204496448 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647148.sst): first pass time = 0.45's, 300.245'MB/sec 2024/08/20-07:31:34.217181 140500204496448 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647148.sst): old prealloc_size = 147639500, real_size = 100304096 2024/08/20-07:31:34.217417 140500204496448 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647148.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 197660 prefix = 4 raw-key = 0.0024 GB zip-key = 0.0004 GB avg-key = 12.00 avg-zkey = 1.91 raw-val = 0.1295 GB zip-val = 0.0999 GB avg-val = 655.03 avg-zval = 505.30 2024/08/20-07:31:34.217665 140500204496448 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647148.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0004 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-07:31:34.702389 140500204496448 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647148.sst): second pass time = 5.69's, 22.755'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.49's, 210.945'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1985.129'MB/sec (index lex order gen) rebuild zvType time = 0.38's, 0.130'MB/sec write SST data time = 0.11's, 966.146'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.350'MB, throughput = 26376.492'MB/sec zip my value time = 5.69's, unzip length = 0.129'GB zip my value throughput = 22.755'MB/sec zip pipeline throughput = 147.075'MB/sec entries = 197660 avg-key = 24.00 avg-zkey = 1.91 avg-val = 655.03 avg-zval = 505.30 usrkeys = 197660 avg-key = 16.00 avg-zkey = 1.91 avg-val = 662.03 avg-zval = 505.30 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 197660 bytes = 741232 } seq expand size = 1383620 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0032 GB value = 0.1295 GB dict = 1.35 MB all = 0.1342 GB } __ZipSize{ index = 0.0004 GB value = 0.0999 GB dict = 1.35 MB all = 0.1023 GB } UnZip/Zip{ index = 8.3953 value = 1.2963 dict = 1.00 all = 1.3114 } Zip/UnZip{ index = 0.1191 value = 0.7714 dict = 1.00 all = 0.7626 } ---------------------------- total value len = 62.427607 GB avg = 0.180 KB (by entry num) total key len = 6.793502 GB avg = 0.020 KB total ukey len = 3.192670 GB avg = 0.008 KB total ukey num = 0.389531221 Billion total entry num = 0.346409229 Billion write speed all = 1.377438568 MB/sec (with seq num) write speed all = 1.322292681 MB/sec (without seq num) 2024/08/20-07:31:34.910554 140500204496448 [compaction_job.cc:1944] [default] [JOB 15756] Generated table #14647148: 197660 keys, 102349050 bytes, temperature: kWarm 2024/08/20-07:31:34.910650 140500204496448 EVENT_LOG_v1 {"time_micros": 1724110294910590, "cf_name": "default", "job": 15756, "event": "table_file_creation", "file_number": 14647148, "file_size": 102349050, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189647300645, "largest_seqno": 190188541525, "table_properties": {"data_size": 99877776, "index_size": 376704, "index_partitions": 0, "top_level_index_size": 0, "index_key_is_user_key": 0, "index_value_is_delta_encoded": 0, "filter_size": 0, "raw_key_size": 4743840, "raw_average_key_size": 24, "raw_value_size": 129474030, "raw_average_value_size": 655, "num_data_blocks": 1, "num_entries": 197660, "num_filter_entries": 0, "num_deletions": 0, "num_merge_operands": 0, "num_range_deletions": 0, "format_version": 0, "fixed_key_len": 24, "fixed_value_len": 18446744073709551615, "filter_policy": "", "column_family_name": "default", "column_family_id": 0, "comparator": "leveldb.BytewiseComparator", "merge_operator": "nullptr", "prefix_extractor_name": "nullptr", "property_collectors": "[Rdb_tbl_prop_coll_factory]", "compression": "FlatZip", "compression_options": "RS_Key0_Tag1-NestLoudsTrieDAWG_Mixed_XL_256_32_FL-DictZipBlobStore", "creation_time": 1724110288, "oldest_key_time": 0, "file_creation_time": 1724110288, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "90ZT1ZM5QNL093I8HHQG", "orig_file_number": 14647148, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-07:31:35.009224 140500204496448 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647149.sst) /dev/shm/ToplingTemp/Topling-240162-Zypk08 2024/08/20-07:31:36.013367 140500204496448 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647149.sst): first pass time = 1.00's, 95.242'MB/sec 2024/08/20-07:31:38.084292 140500204496448 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647149.sst): old prealloc_size = 147639500, real_size = 71611104 2024/08/20-07:31:38.084470 140500204496448 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647149.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 140869 prefix = 4 raw-key = 0.0017 GB zip-key = 0.0003 GB avg-key = 12.00 avg-zkey = 1.88 raw-val = 0.0923 GB zip-val = 0.0713 GB avg-val = 654.87 avg-zval = 506.22 2024/08/20-07:31:38.084636 140500204496448 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647149.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0003 GB, waited 0.000 sec, Key+Value = 0.096 GB 2024/08/20-07:31:38.377885 140500204496448 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00/14647149.sst): second pass time = 2.07's, 44.562'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.29's, 248.752'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1711.848'MB/sec (index lex order gen) rebuild zvType time = 0.22's, 0.157'MB/sec write SST data time = 0.07's, 1048.528'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.972'MB, throughput = 22012.570'MB/sec zip my value time = 2.07's, unzip length = 0.092'GB zip my value throughput = 44.562'MB/sec zip pipeline throughput = 68.849'MB/sec entries = 140869 avg-key = 24.00 avg-zkey = 1.88 avg-val = 654.87 avg-zval = 506.22 usrkeys = 140869 avg-key = 16.00 avg-zkey = 1.88 avg-val = 661.87 avg-zval = 506.22 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 140869 bytes = 475440 } seq expand size = 986083 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0023 GB value = 0.0923 GB dict = 0.97 MB all = 0.0956 GB } __ZipSize{ index = 0.0003 GB value = 0.0713 GB dict = 0.97 MB all = 0.0730 GB } UnZip/Zip{ index = 8.4963 value = 1.2936 dict = 1.00 all = 1.3096 } Zip/UnZip{ index = 0.1177 value = 0.7730 dict = 1.00 all = 0.7636 } ---------------------------- total value len = 62.520844 GB avg = 0.180 KB (by entry num) total key len = 6.796882 GB avg = 0.020 KB total ukey len = 3.194924 GB avg = 0.008 KB total ukey num = 0.389672090 Billion total entry num = 0.346550098 Billion write speed all = 1.379260288 MB/sec (with seq num) write speed all = 1.324096010 MB/sec (without seq num) 2024/08/20-07:31:38.470104 140500204496448 [compaction_job.cc:1944] [default] [JOB 15756] Generated table #14647149: 140869 keys, 73025625 bytes, temperature: kWarm 2024/08/20-07:31:38.470178 140500204496448 EVENT_LOG_v1 {"time_micros": 1724110298470135, "cf_name": "default", "job": 15756, "event": "table_file_creation", "file_number": 14647149, "file_size": 73025625, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 190095658237, "largest_seqno": 190188541478, "table_properties": {"data_size": 71310416, "index_size": 265280, "index_partitions": 0, "top_level_index_size": 0, "index_key_is_user_key": 0, "index_value_is_delta_encoded": 0, "filter_size": 0, "raw_key_size": 3380856, "raw_average_key_size": 24, "raw_value_size": 92250358, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 140869, "num_filter_entries": 0, "num_deletions": 0, "num_merge_operands": 0, "num_range_deletions": 0, "format_version": 0, "fixed_key_len": 24, "fixed_value_len": 18446744073709551615, "filter_policy": "", "column_family_name": "default", "column_family_id": 0, "comparator": "leveldb.BytewiseComparator", "merge_operator": "nullptr", "prefix_extractor_name": "nullptr", "property_collectors": "[Rdb_tbl_prop_coll_factory]", "compression": "FlatZip", "compression_options": "RS_Key0_Tag1-NestLoudsTrieDAWG_Mixed_XL_256_32_FL-DictZipBlobStore", "creation_time": 1724110294, "oldest_key_time": 0, "file_creation_time": 1724110294, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "90ZT1ZM5QNL093I8HHQG", "orig_file_number": 14647149, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-07:31:38.522081 140500204496448 [compaction_job.cc:699] job-15756: subcompact[0], size: 0.175375 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-15756/att-00 [14647148,14647149] 2024/08/20-07:31:38.599263 140500204496448 (Original Log Time 2024/08/20-07:31:27.088914) EVENT_LOG_v1 {"time_micros": 1724110287088862, "job": 15756, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L2": [14647127], "files_L3": [14647081, 14647082], "score": 0.960402, "input_data_size": 195293659, "oldest_snapshot_seqno": 190188564856} 2024/08/20-07:31:38.599268 140500204496448 (Original Log Time 2024/08/20-07:31:38.598723) [compaction_job.cc:2018] [default] [JOB 15756] Compacted 1@2 + 2@3 files to L3 => 175374675 bytes 2024/08/20-07:31:38.599271 140500204496448 (Original Log Time 2024/08/20-07:31:38.599177) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.01, MB/sec: 17.1 rd, 15.3 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(20.8, 165.4 +0.0 blob) out(167.3 +0.0 blob), read-write-amplify(17.0) write-amplify(8.0) OK, records in: 366607, records dropped: 28078 output_compression: Snappy 2024/08/20-07:31:38.599281 140500204496448 (Original Log Time 2024/08/20-07:31:38.599234) EVENT_LOG_v1 {"time_micros": 1724110298599209, "cf": "default", "job": 15756, "event": "compaction_finished", "compaction_time_micros": 11433182, "compaction_time_cpu_micros": 1428591, "output_level": 3, "num_output_files": 2, "total_output_size": 175374675, "num_input_records": 366607, "num_output_records": 338529, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 154770680, "file_range_sync_nanos": 0, "file_fsync_nanos": 2044, "file_prepare_write_nanos": 6543, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-07:31:38.746406 140500204496448 DEBG dcompact_worker.cpp:240: HttpPost: 200 OK: url = http://nlb-7zny4kaa1poal01o64.cn-shenzhen.nlb.aliyuncs.com:8443, body = {"instanceId":"nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137","labourId":"","dbId":"a007a635-5c0a-4b4a-be96-b9c695cb016b","dbStarts":1724092920,"starts":1724110286,"executesMs":11623,"compactionJobId":15756,"attempt":0,"compactionInputRawBytes":248896298,"compactionInputZipBytes":195293659,"compactionOutputRawBytes":0,"compactionOutputZipBytes":175374675,"headers":{"Accept":"*/*","Connection":"close","Host":"aliyun-topling-saas.topling.cn:18443","RemoteIp":"120.24.192.169","X-Forwarded-For":"120.24.192.169","region":"cn-shenzhen","token":"e6474c481bd4415abc537135cc03626b","instance-token":"e6474c481bd4415abc537135cc03626b","provider":"aliyun","CloudMarketInstanceId":"si-59c0ae5c955845588903","MeteringAssit":"","Transfer-Encoding":"chunked","traceparent":"00-61b84b4fcc447c88cb0f6915b1173f4c-95034f46f210dfff-00"}}, response = 2024/08/20-07:31:38.746548 140500204496448 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-15756/att-00: olev 3, work 11.623 s, result 10.393 ms, install 0.591 ms, input{raw 237.366 MiB zip 186.247 MiB}