2024/08/20-05:37:18.761699 140500296816192 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00: fork to child time = 0.010633 sec 2024/08/20-05:37:18.762719 140500296816192 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00 2024/08/20-05:37:18.768111 140500296816192 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00 2024/08/20-05:37:18.768400 140500296816192 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-05:37:18.768753 140500296816192 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-05:37:18.812586 140500296816192 [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-10084/att-00/MANIFEST-14629260 2024/08/20-05:37:18.826648 140500296816192 [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-10084/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14640731, last_sequence is 190042439738, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14640631 2024/08/20-05:37:18.826656 140500296816192 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-05:37:18.826835 140500296816192 [version_set.cc:5652] Creating manifest 14640731 2024/08/20-05:37:18.853126 140500296816192 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-05:37:18.869407 140500296816192 [compaction_job.cc:2433] [default] [JOB 10084] Compacting 1@2 + 2@3 files to L3, score 1.14, subcompactions 1 : 1 2024/08/20-05:37:18.869418 140500296816192 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 5231 Base level 2, inputs: [14640726(20MB)], [14640286(12MB) 14639347(10MB)] 2024/08/20-05:37:18.874643 140500296816192 [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 2024/08/20-05:37:18.874689 140500296816192 [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 2024/08/20-05:37:18.874716 140500296816192 [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 2024/08/20-05:37:18.874727 140500296816192 [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 2024/08/20-05:37:18.874738 140500296816192 [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 2024/08/20-05:37:19.137838 140500296816192 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640732.sst) /dev/shm/ToplingTemp/Topling-196892-HxYWKe 2024/08/20-05:37:20.331305 140500296816192 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640732.sst): first pass time = 1.19's, 112.467'MB/sec 2024/08/20-05:37:23.638232 140500296816192 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640732.sst): old prealloc_size = 50750975, real_size = 36888656 2024/08/20-05:37:23.638886 140500296816192 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640732.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 929492 prefix = 4 raw-key = 0.0149 GB zip-key = 0.0018 GB avg-key = 16.00 avg-zkey = 1.89 raw-val = 0.1082 GB zip-val = 0.0349 GB avg-val = 116.40 avg-zval = 37.55 2024/08/20-05:37:23.639724 140500296816192 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640732.sst: sumWaitingMem = 0.002 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0023 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-05:37:24.448759 140500296816192 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640732.sst): second pass time = 3.31's, 32.726'MB/sec, value only(80.6% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.81's, 50.726'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2801.128'MB/sec (index lex order gen) rebuild zvType time = 0.67's, 0.345'MB/sec write SST data time = 0.14's, 303.030'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.079'MB, throughput = 24573.263'MB/sec zip my value time = 3.31's, unzip length = 0.108'GB zip my value throughput = 32.726'MB/sec zip pipeline throughput = 160.213'MB/sec entries = 929492 avg-key = 28.00 avg-zkey = 1.89 avg-val = 116.40 avg-zval = 37.55 usrkeys = 929492 avg-key = 20.00 avg-zkey = 1.89 avg-val = 123.40 avg-zval = 37.55 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 929492 bytes = 3369424 } seq expand size = 6506444 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0186 GB value = 0.1082 GB dict = 1.08 MB all = 0.1342 GB } __ZipSize{ index = 0.0018 GB value = 0.0349 GB dict = 1.08 MB all = 0.0411 GB } UnZip/Zip{ index = 10.5820 value = 3.1001 dict = 1.00 all = 3.2645 } Zip/UnZip{ index = 0.0945 value = 0.3226 dict = 1.00 all = 0.3063 } ---------------------------- total value len = 62.411448 GB avg = 0.180 KB (by entry num) total key len = 6.814783 GB avg = 0.020 KB total ukey len = 3.208097 GB avg = 0.008 KB total ukey num = 0.390263053 Billion total entry num = 0.347141061 Billion write speed all = 1.594955161 MB/sec (with seq num) write speed all = 1.530970811 MB/sec (without seq num) 2024/08/20-05:37:24.497753 140500296816192 [compaction_job.cc:1944] [default] [JOB 10084] Generated table #14640732: 929492 keys, 41114637 bytes, temperature: kWarm 2024/08/20-05:37:24.497832 140500296816192 EVENT_LOG_v1 {"time_micros": 1724103444497786, "cf_name": "default", "job": 10084, "event": "table_file_creation", "file_number": 14640732, "file_size": 41114637, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189770318781, "largest_seqno": 190041840917, "table_properties": {"data_size": 34899392, "index_size": 1756736, "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": 26025776, "raw_average_key_size": 28, "raw_value_size": 108192008, "raw_average_value_size": 116, "num_data_blocks": 1, "num_entries": 929492, "num_filter_entries": 0, "num_deletions": 0, "num_merge_operands": 0, "num_range_deletions": 0, "format_version": 0, "fixed_key_len": 28, "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": 1724103439, "oldest_key_time": 0, "file_creation_time": 1724103439, "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": 14640732, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-05:37:24.536324 140500296816192 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640733.sst) /dev/shm/ToplingTemp/Topling-196892-TOww9e 2024/08/20-05:37:24.550451 140500296816192 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640733.sst): first pass time = 0.01's, 228.405'MB/sec 2024/08/20-05:37:24.592178 140500296816192 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640733.sst): old prealloc_size = 50750975, real_size = 1076336 2024/08/20-05:37:24.592241 140500296816192 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640733.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 22047 prefix = 4 raw-key = 0.0004 GB zip-key = 0.0000 GB avg-key = 16.00 avg-zkey = 1.99 raw-val = 0.0026 GB zip-val = 0.0010 GB avg-val = 117.97 avg-zval = 46.57 2024/08/20-05:37:24.592295 140500296816192 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640733.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0000 GB, waited 0.000 sec, Key+Value = 0.003 GB 2024/08/20-05:37:24.616988 140500296816192 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00/14640733.sst): second pass time = 0.04's, 63.444'MB/sec, value only(80.8% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.02's, 47.252'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1072.696'MB/sec (index lex order gen) rebuild zvType time = 0.02's, 0.262'MB/sec write SST data time = 0.00's, 315.680'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.026'MB, throughput = 558.880'MB/sec zip my value time = 0.04's, unzip length = 0.003'GB zip my value throughput = 63.444'MB/sec zip pipeline throughput = 63.444'MB/sec entries = 22047 avg-key = 28.00 avg-zkey = 1.99 avg-val = 117.97 avg-zval = 46.57 usrkeys = 22047 avg-key = 20.00 avg-zkey = 1.99 avg-val = 124.97 avg-zval = 46.57 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 22047 bytes = 74416 } seq expand size = 154329 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0004 GB value = 0.0026 GB dict = 0.03 MB all = 0.0032 GB } __ZipSize{ index = 0.0000 GB value = 0.0010 GB dict = 0.03 MB all = 0.0012 GB } UnZip/Zip{ index = 10.0579 value = 2.5330 dict = 1.00 all = 2.7456 } Zip/UnZip{ index = 0.0994 value = 0.3948 dict = 1.00 all = 0.3642 } ---------------------------- total value len = 62.414203 GB avg = 0.180 KB (by entry num) total key len = 6.815401 GB avg = 0.020 KB total ukey len = 3.208538 GB avg = 0.008 KB total ukey num = 0.390285100 Billion total entry num = 0.347163108 Billion write speed all = 1.595026679 MB/sec (with seq num) write speed all = 1.531038514 MB/sec (without seq num) 2024/08/20-05:37:24.630714 140500296816192 [compaction_job.cc:1944] [default] [JOB 10084] Generated table #14640733: 22047 keys, 1172096 bytes, temperature: kWarm 2024/08/20-05:37:24.630772 140500296816192 EVENT_LOG_v1 {"time_micros": 1724103444630740, "cf_name": "default", "job": 10084, "event": "table_file_creation", "file_number": 14640733, "file_size": 1172096, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189724231068, "largest_seqno": 189793092115, "table_properties": {"data_size": 1026784, "index_size": 43840, "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": 617316, "raw_average_key_size": 28, "raw_value_size": 2600818, "raw_average_value_size": 117, "num_data_blocks": 1, "num_entries": 22047, "num_filter_entries": 0, "num_deletions": 0, "num_merge_operands": 0, "num_range_deletions": 0, "format_version": 0, "fixed_key_len": 28, "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": 1724103444, "oldest_key_time": 0, "file_creation_time": 1724103444, "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": 14640733, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-05:37:24.642520 140500296816192 [compaction_job.cc:699] job-10084: subcompact[0], size: 0.042287 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-10084/att-00 [14640732,14640733] 2024/08/20-05:37:24.658911 140500296816192 (Original Log Time 2024/08/20-05:37:18.869464) EVENT_LOG_v1 {"time_micros": 1724103438869431, "job": 10084, "event": "compaction_started", "compaction_reason": "LevelMaxLevelSize", "files_L2": [14640726], "files_L3": [14640286, 14639347], "score": 1.14327, "input_data_size": 46137250, "oldest_snapshot_seqno": 190042438244} 2024/08/20-05:37:24.658915 140500296816192 (Original Log Time 2024/08/20-05:37:24.658547) [compaction_job.cc:2018] [default] [JOB 10084] Compacted 1@2 + 2@3 files to L3 => 42286733 bytes 2024/08/20-05:37:24.658916 140500296816192 (Original Log Time 2024/08/20-05:37:24.658858) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.00, MB/sec: 8.0 rd, 7.3 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(20.2, 23.8 +0.0 blob) out(40.3 +0.0 blob), read-write-amplify(4.2) write-amplify(2.0) OK, records in: 1003597, records dropped: 52058 output_compression: Snappy 2024/08/20-05:37:24.658935 140500296816192 (Original Log Time 2024/08/20-05:37:24.658896) EVENT_LOG_v1 {"time_micros": 1724103444658878, "cf": "default", "job": 10084, "event": "compaction_finished", "compaction_time_micros": 5773065, "compaction_time_cpu_micros": 1659196, "output_level": 3, "num_output_files": 2, "total_output_size": 42286733, "num_input_records": 1003597, "num_output_records": 951539, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 36482005, "file_range_sync_nanos": 0, "file_fsync_nanos": 1718, "file_prepare_write_nanos": 4427, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-05:37:24.781433 140500296816192 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":1724103438,"executesMs":5890,"compactionJobId":10084,"attempt":0,"compactionInputRawBytes":144828154,"compactionInputZipBytes":46137250,"compactionOutputRawBytes":0,"compactionOutputZipBytes":42286733,"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":"00-0ed9d0b7f3afac998966a320ed060de3-9703d67969f93ff8-00"}}, response = 2024/08/20-05:37:24.781518 140500296816192 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-10084/att-00: olev 3, work 5.891 s, result 5.954 ms, install 0.410 ms, input{raw 138.119 MiB zip 44.000 MiB}