2024/08/20-09:37:50.765710 140500582168128 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00: fork to child time = 0.025122 sec 2024/08/20-09:37:50.766748 140500582168128 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00 2024/08/20-09:37:50.772416 140500582168128 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00 2024/08/20-09:37:50.779076 140500582168128 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-09:37:50.779355 140500582168128 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-09:37:50.827042 140500582168128 [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-22089/att-00/MANIFEST-14629260 2024/08/20-09:37:50.859952 140500582168128 [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-22089/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14654477, last_sequence is 190339908018, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14654442 2024/08/20-09:37:50.859961 140500582168128 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-09:37:50.860028 140500582168128 [version_set.cc:5652] Creating manifest 14654477 2024/08/20-09:37:50.891362 140500582168128 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-09:37:50.907825 140500582168128 [compaction_job.cc:2433] [default] [JOB 22089] Compacting 1@2 + 2@3 files to L3, score 1.00, subcompactions 1 : 1 2024/08/20-09:37:50.907841 140500582168128 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 11322 Base level 2, inputs: [14654457(20MB)], [14654413(97MB) 14654414(67MB)] 2024/08/20-09:37:51.085601 140500582168128 [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 2024/08/20-09:37:51.085630 140500582168128 [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 2024/08/20-09:37:51.085648 140500582168128 [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 2024/08/20-09:37:51.085660 140500582168128 [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 2024/08/20-09:37:51.085671 140500582168128 [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 2024/08/20-09:37:51.951886 140500582168128 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654478.sst) /dev/shm/ToplingTemp/Topling-289228-IgUahi 2024/08/20-09:37:52.802774 140500582168128 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654478.sst): first pass time = 0.85's, 157.753'MB/sec 2024/08/20-09:37:59.137957 140500582168128 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654478.sst): old prealloc_size = 147639500, real_size = 100284976 2024/08/20-09:37:59.138195 140500582168128 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654478.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 197739 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 = 654.76 avg-zval = 505.00 2024/08/20-09:37:59.138550 140500582168128 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654478.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0004 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-09:37:59.826258 140500582168128 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654478.sst): second pass time = 6.33's, 20.444'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.69's, 148.668'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1988.629'MB/sec (index lex order gen) rebuild zvType time = 0.55's, 0.089'MB/sec write SST data time = 0.13's, 764.199'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.349'MB, throughput = 25507.071'MB/sec zip my value time = 6.33's, unzip length = 0.129'GB zip my value throughput = 20.444'MB/sec zip pipeline throughput = 147.715'MB/sec entries = 197739 avg-key = 24.00 avg-zkey = 1.91 avg-val = 654.76 avg-zval = 505.00 usrkeys = 197739 avg-key = 16.00 avg-zkey = 1.91 avg-val = 661.76 avg-zval = 505.00 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 197739 bytes = 741536 } seq expand size = 1384173 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 = 0.0999 GB dict = 1.35 MB all = 0.1023 GB } UnZip/Zip{ index = 8.3987 value = 1.2966 dict = 1.00 all = 1.3116 } Zip/UnZip{ index = 0.1191 value = 0.7713 dict = 1.00 all = 0.7624 } ---------------------------- total value len = 62.427606 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 = 0.389531300 Billion total entry num = 0.346409308 Billion write speed all = 1.196797311 MB/sec (with seq num) write speed all = 1.148883404 MB/sec (without seq num) 2024/08/20-09:37:59.991913 140500582168128 [compaction_job.cc:1944] [default] [JOB 22089] Generated table #14654478: 197739 keys, 102328968 bytes, temperature: kWarm 2024/08/20-09:37:59.992016 140500582168128 EVENT_LOG_v1 {"time_micros": 1724117879991961, "cf_name": "default", "job": 22089, "event": "table_file_creation", "file_number": 14654478, "file_size": 102328968, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189648517461, "largest_seqno": 190339884453, "table_properties": {"data_size": 99858656, "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": 4745736, "raw_average_key_size": 24, "raw_value_size": 129472065, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 197739, "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": 1724117871, "oldest_key_time": 0, "file_creation_time": 1724117871, "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": 14654478, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-09:38:00.095512 140500582168128 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654479.sst) /dev/shm/ToplingTemp/Topling-289228-PgD0df 2024/08/20-09:38:00.853535 140500582168128 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654479.sst): first pass time = 0.76's, 124.989'MB/sec 2024/08/20-09:38:02.712747 140500582168128 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654479.sst): old prealloc_size = 147639500, real_size = 70939712 2024/08/20-09:38:02.712916 140500582168128 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654479.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 139530 prefix = 4 raw-key = 0.0017 GB zip-key = 0.0003 GB avg-key = 12.00 avg-zkey = 1.89 raw-val = 0.0914 GB zip-val = 0.0706 GB avg-val = 654.96 avg-zval = 506.28 2024/08/20-09:38:02.713101 140500582168128 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654479.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0003 GB, waited 0.000 sec, Key+Value = 0.095 GB 2024/08/20-09:38:02.970670 140500582168128 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00/14654479.sst): second pass time = 1.86's, 49.178'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.26's, 280.393'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1691.771'MB/sec (index lex order gen) rebuild zvType time = 0.19's, 0.181'MB/sec write SST data time = 0.06's, 1113.825'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.959'MB, throughput = 25922.796'MB/sec zip my value time = 1.86's, unzip length = 0.091'GB zip my value throughput = 49.178'MB/sec zip pipeline throughput = 109.919'MB/sec entries = 139530 avg-key = 24.00 avg-zkey = 1.89 avg-val = 654.96 avg-zval = 506.28 usrkeys = 139530 avg-key = 16.00 avg-zkey = 1.89 avg-val = 661.96 avg-zval = 506.28 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 139530 bytes = 470928 } seq expand size = 976710 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0022 GB value = 0.0914 GB dict = 0.96 MB all = 0.0947 GB } __ZipSize{ index = 0.0003 GB value = 0.0706 GB dict = 0.96 MB all = 0.0723 GB } UnZip/Zip{ index = 8.4872 value = 1.2937 dict = 1.00 all = 1.3096 } Zip/UnZip{ index = 0.1178 value = 0.7730 dict = 1.00 all = 0.7636 } ---------------------------- total value len = 62.519969 GB avg = 0.180 KB (by entry num) total key len = 6.796852 GB avg = 0.020 KB total ukey len = 3.194904 GB avg = 0.008 KB total ukey num = 0.389670830 Billion total entry num = 0.346548838 Billion write speed all = 1.198386971 MB/sec (with seq num) write speed all = 1.150456371 MB/sec (without seq num) 2024/08/20-09:38:03.069700 140500582168128 [compaction_job.cc:1944] [default] [JOB 22089] Generated table #14654479: 139530 keys, 72337146 bytes, temperature: kWarm 2024/08/20-09:38:03.069765 140500582168128 EVENT_LOG_v1 {"time_micros": 1724117883069732, "cf_name": "default", "job": 22089, "event": "table_file_creation", "file_number": 14654479, "file_size": 72337146, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 190244255164, "largest_seqno": 190339884482, "table_properties": {"data_size": 70641584, "index_size": 263040, "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": 3348720, "raw_average_key_size": 24, "raw_value_size": 91386581, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 139530, "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": 1724117880, "oldest_key_time": 0, "file_creation_time": 1724117880, "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": 14654479, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-09:38:03.095341 140500582168128 [compaction_job.cc:699] job-22089: subcompact[0], size: 0.174666 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-22089/att-00 [14654478,14654479] 2024/08/20-09:38:03.129237 140500582168128 (Original Log Time 2024/08/20-09:37:50.907934) EVENT_LOG_v1 {"time_micros": 1724117870907867, "job": 22089, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L2": [14654457], "files_L3": [14654413, 14654414], "score": 0.999158, "input_data_size": 194195468, "oldest_snapshot_seqno": 190339907003} 2024/08/20-09:38:03.129241 140500582168128 (Original Log Time 2024/08/20-09:38:03.128815) [compaction_job.cc:2018] [default] [JOB 22089] Compacted 1@2 + 2@3 files to L3 => 174666114 bytes 2024/08/20-09:38:03.129242 140500582168128 (Original Log Time 2024/08/20-09:38:03.129168) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.01, MB/sec: 15.9 rd, 14.3 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(20.4, 164.8 +0.0 blob) out(166.6 +0.0 blob), read-write-amplify(17.2) write-amplify(8.2) OK, records in: 364831, records dropped: 27562 output_compression: Snappy 2024/08/20-09:38:03.129249 140500582168128 (Original Log Time 2024/08/20-09:38:03.129212) EVENT_LOG_v1 {"time_micros": 1724117883129193, "cf": "default", "job": 22089, "event": "compaction_finished", "compaction_time_micros": 12187415, "compaction_time_cpu_micros": 1338435, "output_level": 3, "num_output_files": 2, "total_output_size": 174666114, "num_input_records": 364831, "num_output_records": 337269, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 190401274, "file_range_sync_nanos": 0, "file_fsync_nanos": 1453, "file_prepare_write_nanos": 5365, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-09:38:03.264171 140500582168128 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":1724117870,"executesMs":12356,"compactionJobId":22089,"attempt":0,"compactionInputRawBytes":247672611,"compactionInputZipBytes":194195468,"compactionOutputRawBytes":0,"compactionOutputZipBytes":174666114,"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":"00-53c6b3c7a185ee35fbc98574e244f40f-7e95d3313ce96619-00"}}, response = 2024/08/20-09:38:03.264255 140500582168128 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-22089/att-00: olev 3, work 12.357 s, result 6.223 ms, install 0.456 ms, input{raw 236.199 MiB zip 185.199 MiB}