2024/08/20-22:21:33.847337 139857160226368 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00: fork to child time = 0.048357 sec 2024/08/20-22:21:33.848166 139857160226368 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00 2024/08/20-22:21:33.853050 139857160226368 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00 2024/08/20-22:21:33.854416 139857160226368 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-22:21:33.854696 139857160226368 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-22:21:33.909790 139857160226368 [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-52628/att-00/MANIFEST-14629260 2024/08/20-22:21:33.931243 139857160226368 [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-52628/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14689857, last_sequence is 191119970854, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14689692 2024/08/20-22:21:33.931252 139857160226368 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-22:21:33.931331 139857160226368 [version_set.cc:5652] Creating manifest 14689857 2024/08/20-22:21:33.982429 139857160226368 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-22:21:34.010981 139857160226368 [compaction_job.cc:2433] [default] [JOB 52628] Compacting 1@2 + 2@3 files to L3, score 1.00, subcompactions 1 : 1 2024/08/20-22:21:34.011050 139857160226368 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 26645 Base level 2, inputs: [14689834(19MB)], [14689746(97MB) 14689747(2673KB)] 2024/08/20-22:21:34.404354 139857160226368 [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 2024/08/20-22:21:34.404378 139857160226368 [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 2024/08/20-22:21:34.404396 139857160226368 [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 2024/08/20-22:21:34.404407 139857160226368 [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 2024/08/20-22:21:34.404421 139857160226368 [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 2024/08/20-22:21:35.387287 139857160226368 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689858.sst) /dev/shm/ToplingTemp/Topling-39592-TaI6EV 2024/08/20-22:21:35.875113 139857160226368 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689858.sst): first pass time = 0.49's, 275.172'MB/sec 2024/08/20-22:21:39.468634 139857160226368 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689858.sst): old prealloc_size = 138127196, real_size = 100064384 2024/08/20-22:21:39.468848 139857160226368 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689858.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 197709 prefix = 4 raw-key = 0.0024 GB zip-key = 0.0004 GB avg-key = 12.00 avg-zkey = 1.93 raw-val = 0.1295 GB zip-val = 0.0996 GB avg-val = 654.87 avg-zval = 503.93 2024/08/20-22:21:39.469119 139857160226368 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689858.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.000 GB, reorder workingMem = 0.0004 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-22:21:39.900482 139857160226368 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689858.sst): second pass time = 3.59's, 36.040'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.43's, 236.502'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2059.246'MB/sec (index lex order gen) rebuild zvType time = 0.31's, 0.159'MB/sec write SST data time = 0.12's, 849.634'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.348'MB, throughput = 30090.136'MB/sec zip my value time = 3.59's, unzip length = 0.129'GB zip my value throughput = 36.040'MB/sec zip pipeline throughput = 114.606'MB/sec entries = 197709 avg-key = 24.00 avg-zkey = 1.93 avg-val = 654.87 avg-zval = 503.93 usrkeys = 197709 avg-key = 16.00 avg-zkey = 1.93 avg-val = 661.87 avg-zval = 503.93 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 197709 bytes = 766144 } seq expand size = 1383963 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0032 GB value = 0.1295 GB dict = 1.35 MB all = 0.1342 GB } __ZipSize{ index = 0.0004 GB value = 0.0996 GB dict = 1.35 MB all = 0.1021 GB } UnZip/Zip{ index = 8.2737 value = 1.2995 dict = 1.00 all = 1.3142 } Zip/UnZip{ index = 0.1209 value = 0.7695 dict = 1.00 all = 0.7609 } ---------------------------- total value len = 0.130857 GB avg = 0.662 KB (by entry num) total key len = 0.004745 GB avg = 0.024 KB total ukey len = 0.003163 GB avg = 0.016 KB total ukey num = 0.000197709 Billion total entry num = 0.000197709 Billion write speed all = 0.017296549 MB/sec (with seq num) write speed all = 0.017094800 MB/sec (without seq num) 2024/08/20-22:21:40.026870 139857160226368 [compaction_job.cc:1944] [default] [JOB 52628] Generated table #14689858: 197709 keys, 102131813 bytes, temperature: kWarm 2024/08/20-22:21:40.026943 139857160226368 EVENT_LOG_v1 {"time_micros": 1724163700026892, "cf_name": "default", "job": 52628, "event": "table_file_creation", "file_number": 14689858, "file_size": 102131813, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189648517461, "largest_seqno": 191119913813, "table_properties": {"data_size": 99632432, "index_size": 382336, "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": 4745016, "raw_average_key_size": 24, "raw_value_size": 129472777, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 197709, "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": 1724163695, "oldest_key_time": 0, "file_creation_time": 1724163695, "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": 14689858, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-22:21:40.355936 139857160226368 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689859.sst) /dev/shm/ToplingTemp/Topling-39592-XPt1AW 2024/08/20-22:21:40.413464 139857160226368 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689859.sst): first pass time = 0.06's, 113.365'MB/sec 2024/08/20-22:21:40.827437 139857160226368 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689859.sst): old prealloc_size = 138127196, real_size = 5008864 2024/08/20-22:21:40.827510 139857160226368 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689859.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 9594 prefix = 4 raw-key = 0.0001 GB zip-key = 0.0000 GB avg-key = 12.00 avg-zkey = 2.51 raw-val = 0.0063 GB zip-val = 0.0050 GB avg-val = 655.14 avg-zval = 519.30 2024/08/20-22:21:40.827570 139857160226368 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689859.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.000 GB, reorder workingMem = 0.0000 GB, waited 0.000 sec, Key+Value = 0.007 GB 2024/08/20-22:21:40.859514 139857160226368 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00/14689859.sst): second pass time = 0.41's, 15.216'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.03's, 159.328'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 516.781'MB/sec (index lex order gen) rebuild zvType time = 0.03's, 0.091'MB/sec write SST data time = 0.01's, 907.084'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.072'MB, throughput = 2424.786'MB/sec zip my value time = 0.41's, unzip length = 0.006'GB zip my value throughput = 15.216'MB/sec zip pipeline throughput = 114.005'MB/sec entries = 9594 avg-key = 24.00 avg-zkey = 2.51 avg-val = 655.14 avg-zval = 519.30 usrkeys = 9594 avg-key = 16.00 avg-zkey = 2.51 avg-val = 662.14 avg-zval = 519.30 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 9594 bytes = 30000 } seq expand size = 67158 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0002 GB value = 0.0063 GB dict = 0.07 MB all = 0.0065 GB } __ZipSize{ index = 0.0000 GB value = 0.0050 GB dict = 0.07 MB all = 0.0051 GB } UnZip/Zip{ index = 6.3621 value = 1.2616 dict = 1.00 all = 1.2753 } Zip/UnZip{ index = 0.1572 value = 0.7927 dict = 1.00 all = 0.7842 } ---------------------------- total value len = 0.137209 GB avg = 0.662 KB (by entry num) total key len = 0.004975 GB avg = 0.024 KB total ukey len = 0.003317 GB avg = 0.016 KB total ukey num = 0.000207303 Billion total entry num = 0.000207303 Billion write speed all = 0.018133991 MB/sec (with seq num) write speed all = 0.017922479 MB/sec (without seq num) 2024/08/20-22:21:40.875425 139857160226368 [compaction_job.cc:1944] [default] [JOB 52628] Generated table #14689859: 9594 keys, 5109255 bytes, temperature: kWarm 2024/08/20-22:21:40.875593 139857160226368 EVENT_LOG_v1 {"time_micros": 1724163700875462, "cf_name": "default", "job": 52628, "event": "table_file_creation", "file_number": 14689859, "file_size": 5109255, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 191087669329, "largest_seqno": 191119913798, "table_properties": {"data_size": 4982160, "index_size": 24128, "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": 230256, "raw_average_key_size": 24, "raw_value_size": 6285376, "raw_average_value_size": 655, "num_data_blocks": 1, "num_entries": 9594, "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": 1724163700, "oldest_key_time": 0, "file_creation_time": 1724163700, "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": 14689859, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-22:21:40.884338 139857160226368 [compaction_job.cc:699] job-52628: subcompact[0], size: 0.107241 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-52628/att-00 [14689858,14689859] 2024/08/20-22:21:40.924765 139857160226368 (Original Log Time 2024/08/20-22:21:34.011149) EVENT_LOG_v1 {"time_micros": 1724163694011072, "job": 52628, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L2": [14689834], "files_L3": [14689746, 14689747], "score": 0.999802, "input_data_size": 125570179, "oldest_snapshot_seqno": 191119970787} 2024/08/20-22:21:40.924771 139857160226368 (Original Log Time 2024/08/20-22:21:40.924223) [compaction_job.cc:2018] [default] [JOB 52628] Compacted 1@2 + 2@3 files to L3 => 107241068 bytes 2024/08/20-22:21:40.924773 139857160226368 (Original Log Time 2024/08/20-22:21:40.924679) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.00, MB/sec: 18.3 rd, 15.6 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(19.7, 100.0 +0.0 blob) out(102.3 +0.0 blob), read-write-amplify(11.2) write-amplify(5.2) OK, records in: 232033, records dropped: 24730 output_compression: Snappy 2024/08/20-22:21:40.924783 139857160226368 (Original Log Time 2024/08/20-22:21:40.924736) EVENT_LOG_v1 {"time_micros": 1724163700924713, "cf": "default", "job": 52628, "event": "compaction_finished", "compaction_time_micros": 6873204, "compaction_time_cpu_micros": 943642, "output_level": 3, "num_output_files": 2, "total_output_size": 107241068, "num_input_records": 232033, "num_output_records": 207303, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 97307252, "file_range_sync_nanos": 0, "file_fsync_nanos": 1878, "file_prepare_write_nanos": 5585, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-22:21:41.081117 139857160226368 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":1724163693,"executesMs":7071,"compactionJobId":52628,"attempt":0,"compactionInputRawBytes":157517683,"compactionInputZipBytes":125570179,"compactionOutputRawBytes":0,"compactionOutputZipBytes":107241068,"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":"00-935eddd38ab52c0216aaba7d675a0a4b-279fdd6ca63fba37-00"}}, response = 2024/08/20-22:21:41.081523 139857160226368 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-52628/att-00: olev 3, work 7.071 s, result 5.380 ms, install 0.593 ms, input{raw 150.221 MiB zip 119.753 MiB}