2024/08/20-07:11:56.659843 140500313601600 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00: fork to child time = 0.024565 sec 2024/08/20-07:11:56.661272 140500313601600 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00 2024/08/20-07:11:56.667981 140500313601600 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00 2024/08/20-07:11:56.669912 140500313601600 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-07:11:56.670516 140500313601600 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-07:11:56.718969 140500313601600 [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-14827/att-00/MANIFEST-14629260 2024/08/20-07:11:56.748910 140500313601600 [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-14827/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14646078, last_sequence is 190164254096, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14646026 2024/08/20-07:11:56.748933 140500313601600 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-07:11:56.749027 140500313601600 [version_set.cc:5652] Creating manifest 14646078 2024/08/20-07:11:56.781199 140500313601600 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-07:11:56.808691 140500313601600 [compaction_job.cc:2433] [default] [JOB 14827] Compacting 1@2 + 2@3 files to L3, score 0.85, subcompactions 1 : 1 2024/08/20-07:11:56.808711 140500313601600 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 7617 Base level 2, inputs: [14646037(31MB)], [14645993(97MB) 14646068(38MB)] 2024/08/20-07:11:57.069440 140500313601600 [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 2024/08/20-07:11:57.069481 140500313601600 [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 2024/08/20-07:11:57.069506 140500313601600 [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 2024/08/20-07:11:57.069522 140500313601600 [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 2024/08/20-07:11:57.069551 140500313601600 [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 2024/08/20-07:11:57.810030 140500313601600 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646079.sst) /dev/shm/ToplingTemp/Topling-233233-LvFd0c 2024/08/20-07:11:58.435911 140500313601600 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646079.sst): first pass time = 0.63's, 214.466'MB/sec 2024/08/20-07:12:02.999324 140500313601600 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646079.sst): old prealloc_size = 147639500, real_size = 100281952 2024/08/20-07:12:02.999523 140500313601600 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646079.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 197711 prefix = 4 raw-key = 0.0024 GB zip-key = 0.0004 GB avg-key = 12.00 avg-zkey = 1.94 raw-val = 0.1295 GB zip-val = 0.0998 GB avg-val = 654.86 avg-zval = 505.03 2024/08/20-07:12:02.999773 140500313601600 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646079.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0004 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-07:12:03.302825 140500313601600 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646079.sst): second pass time = 4.56's, 28.377'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.30's, 337.095'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2226.032'MB/sec (index lex order gen) rebuild zvType time = 0.23's, 0.217'MB/sec write SST data time = 0.08's, 1359.544'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.356'MB, throughput = 29986.707'MB/sec zip my value time = 4.56's, unzip length = 0.129'GB zip my value throughput = 28.377'MB/sec zip pipeline throughput = 141.011'MB/sec entries = 197711 avg-key = 24.00 avg-zkey = 1.94 avg-val = 654.86 avg-zval = 505.03 usrkeys = 197711 avg-key = 16.00 avg-zkey = 1.94 avg-val = 661.86 avg-zval = 505.03 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 197711 bytes = 716720 } seq expand size = 1383977 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0032 GB value = 0.1295 GB dict = 1.36 MB all = 0.1342 GB } __ZipSize{ index = 0.0004 GB value = 0.0998 GB dict = 1.36 MB all = 0.1023 GB } UnZip/Zip{ index = 8.2586 value = 1.2967 dict = 1.00 all = 1.3119 } Zip/UnZip{ index = 0.1211 value = 0.7712 dict = 1.00 all = 0.7623 } ---------------------------- total value len = 62.427607 GB avg = 0.180 KB (by entry num) total key len = 6.793503 GB avg = 0.020 KB total ukey len = 3.192671 GB avg = 0.008 KB total ukey num = 0.389531272 Billion total entry num = 0.346409280 Billion write speed all = 1.410312697 MB/sec (with seq num) write speed all = 1.353850683 MB/sec (without seq num) 2024/08/20-07:12:03.511068 140500313601600 [compaction_job.cc:1944] [default] [JOB 14827] Generated table #14646079: 197711 keys, 102307733 bytes, temperature: kWarm 2024/08/20-07:12:03.511141 140500313601600 EVENT_LOG_v1 {"time_micros": 1724109123511097, "cf_name": "default", "job": 14827, "event": "table_file_creation", "file_number": 14646079, "file_size": 102307733, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189647300645, "largest_seqno": 190164042546, "table_properties": {"data_size": 99849296, "index_size": 383040, "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": 4745064, "raw_average_key_size": 24, "raw_value_size": 129472845, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 197711, "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": 1724109117, "oldest_key_time": 0, "file_creation_time": 1724109117, "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": 14646079, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-07:12:03.562081 140500313601600 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646080.sst) /dev/shm/ToplingTemp/Topling-233233-Cke2vb 2024/08/20-07:12:03.977728 140500313601600 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646080.sst): first pass time = 0.42's, 139.727'MB/sec 2024/08/20-07:12:05.259343 140500313601600 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646080.sst): old prealloc_size = 147639500, real_size = 43728192 2024/08/20-07:12:05.259476 140500313601600 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646080.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 85553 prefix = 4 raw-key = 0.0010 GB zip-key = 0.0002 GB avg-key = 12.00 avg-zkey = 1.91 raw-val = 0.0560 GB zip-val = 0.0435 GB avg-val = 654.76 avg-zval = 508.96 2024/08/20-07:12:05.259617 140500313601600 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646080.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0002 GB, waited 0.000 sec, Key+Value = 0.058 GB 2024/08/20-07:12:05.536427 140500313601600 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00/14646080.sst): second pass time = 1.28's, 43.737'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.28's, 160.866'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1601.126'MB/sec (index lex order gen) rebuild zvType time = 0.24's, 0.089'MB/sec write SST data time = 0.04's, 1261.419'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.576'MB, throughput = 15913.995'MB/sec zip my value time = 1.28's, unzip length = 0.056'GB zip my value throughput = 43.737'MB/sec zip pipeline throughput = 119.423'MB/sec entries = 85553 avg-key = 24.00 avg-zkey = 1.91 avg-val = 654.76 avg-zval = 508.96 usrkeys = 85553 avg-key = 16.00 avg-zkey = 1.91 avg-val = 661.76 avg-zval = 508.96 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 85553 bytes = 288752 } seq expand size = 598871 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0014 GB value = 0.0560 GB dict = 0.58 MB all = 0.0581 GB } __ZipSize{ index = 0.0002 GB value = 0.0435 GB dict = 0.58 MB all = 0.0446 GB } UnZip/Zip{ index = 8.3581 value = 1.2865 dict = 1.00 all = 1.3028 } Zip/UnZip{ index = 0.1196 value = 0.7773 dict = 1.00 all = 0.7676 } ---------------------------- total value len = 62.484223 GB avg = 0.180 KB (by entry num) total key len = 6.795556 GB avg = 0.020 KB total ukey len = 3.194040 GB avg = 0.008 KB total ukey num = 0.389616825 Billion total entry num = 0.346494833 Billion write speed all = 1.411443793 MB/sec (with seq num) write speed all = 1.354970405 MB/sec (without seq num) 2024/08/20-07:12:05.591772 140500313601600 [compaction_job.cc:1944] [default] [JOB 14827] Generated table #14646080: 85553 keys, 44573900 bytes, temperature: kWarm 2024/08/20-07:12:05.591841 140500313601600 EVENT_LOG_v1 {"time_micros": 1724109125591807, "cf_name": "default", "job": 14827, "event": "table_file_creation", "file_number": 14646080, "file_size": 44573900, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 190095658237, "largest_seqno": 190164042811, "table_properties": {"data_size": 43542832, "index_size": 163776, "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": 2053272, "raw_average_key_size": 24, "raw_value_size": 56017058, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 85553, "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": 1724109123, "oldest_key_time": 0, "file_creation_time": 1724109123, "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": 14646080, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-07:12:05.609316 140500313601600 [compaction_job.cc:699] job-14827: subcompact[0], size: 0.146882 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-14827/att-00 [14646079,14646080] 2024/08/20-07:12:05.643608 140500313601600 (Original Log Time 2024/08/20-07:11:56.808788) EVENT_LOG_v1 {"time_micros": 1724109116808727, "job": 14827, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L2": [14646037], "files_L3": [14645993, 14646068], "score": 0.84759, "input_data_size": 176378782, "oldest_snapshot_seqno": 190164253689} 2024/08/20-07:12:05.643612 140500313601600 (Original Log Time 2024/08/20-07:12:05.640310) [compaction_job.cc:2018] [default] [JOB 14827] Compacted 1@2 + 2@3 files to L3 => 146881633 bytes 2024/08/20-07:12:05.643613 140500313601600 (Original Log Time 2024/08/20-07:12:05.643524) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.01, MB/sec: 20.0 rd, 16.7 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(32.0, 136.3 +0.0 blob) out(140.1 +0.0 blob), read-write-amplify(9.6) write-amplify(4.4) OK, records in: 324415, records dropped: 41151 output_compression: Snappy 2024/08/20-07:12:05.643621 140500313601600 (Original Log Time 2024/08/20-07:12:05.643582) EVENT_LOG_v1 {"time_micros": 1724109125643560, "cf": "default", "job": 14827, "event": "compaction_finished", "compaction_time_micros": 8800540, "compaction_time_cpu_micros": 1113107, "output_level": 3, "num_output_files": 2, "total_output_size": 146881633, "num_input_records": 324415, "num_output_records": 283264, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 125482912, "file_range_sync_nanos": 0, "file_fsync_nanos": 1342, "file_prepare_write_nanos": 5946, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-07:12:05.766456 140500313601600 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":1724109116,"executesMs":8973,"compactionJobId":14827,"attempt":0,"compactionInputRawBytes":220241923,"compactionInputZipBytes":176378782,"compactionOutputRawBytes":0,"compactionOutputZipBytes":146881633,"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-d2ff00fe67716437c5f50615e077ee60-41d5323a207ff383-00"}}, response = 2024/08/20-07:12:05.766588 140500313601600 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-14827/att-00: olev 3, work 8.974 s, result 6.268 ms, install 3.337 ms, input{raw 210.039 MiB zip 168.208 MiB}