2024/08/20-14:25:31.874437 140500112176704 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00: fork to child time = 0.076796 sec 2024/08/20-14:25:31.875631 140500112176704 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00 2024/08/20-14:25:31.881319 140500112176704 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00 2024/08/20-14:25:31.886244 140500112176704 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-14:25:31.886646 140500112176704 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-14:25:31.925542 140500112176704 [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-34346/att-00/MANIFEST-14629260 2024/08/20-14:25:31.941537 140500112176704 [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-34346/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14668872, last_sequence is 190656765522, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14668746 2024/08/20-14:25:31.941545 140500112176704 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-14:25:31.941628 140500112176704 [version_set.cc:5652] Creating manifest 14668872 2024/08/20-14:25:31.965656 140500112176704 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-14:25:31.979078 140500112176704 [compaction_job.cc:2433] [default] [JOB 34346] Compacting 1@1 + 2@2 files to L2, score 1.00, subcompactions 1 : 1 2024/08/20-14:25:31.979095 140500112176704 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 17553 Base level 1, inputs: [14668847(8699KB)], [14668834(20MB) 14668835(7148KB)] 2024/08/20-14:25:32.094208 140500112176704 [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 2024/08/20-14:25:32.094232 140500112176704 [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 2024/08/20-14:25:32.094248 140500112176704 [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 2024/08/20-14:25:32.094259 140500112176704 [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 2024/08/20-14:25:32.094269 140500112176704 [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 2024/08/20-14:25:32.345697 140500112176704 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668873.sst) /dev/shm/ToplingTemp/Topling-385178-ZpXCWz 2024/08/20-14:25:32.668499 140500112176704 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668873.sst): first pass time = 0.32's, 207.923'MB/sec 2024/08/20-14:25:35.121970 140500112176704 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668873.sst): old prealloc_size = 41984342, real_size = 19914592 2024/08/20-14:25:35.122372 140500112176704 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668873.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 466251 prefix = 4 raw-key = 0.0075 GB zip-key = 0.0009 GB avg-key = 16.00 avg-zkey = 1.92 raw-val = 0.0541 GB zip-val = 0.0189 GB avg-val = 115.93 avg-zval = 40.54 2024/08/20-14:25:35.122834 140500112176704 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668873.sst: sumWaitingMem = 0.001 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0011 GB, waited 0.000 sec, Key+Value = 0.067 GB 2024/08/20-14:25:35.757393 140500112176704 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668873.sst): second pass time = 2.45's, 22.041'MB/sec, value only(80.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.64's, 34.313'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2370.452'MB/sec (index lex order gen) rebuild zvType time = 0.49's, 0.239'MB/sec write SST data time = 0.15's, 148.266'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.543'MB, throughput = 12507.340'MB/sec zip my value time = 2.45's, unzip length = 0.054'GB zip my value throughput = 22.041'MB/sec zip pipeline throughput = 132.601'MB/sec entries = 466251 avg-key = 28.00 avg-zkey = 1.92 avg-val = 115.93 avg-zval = 40.54 usrkeys = 466251 avg-key = 20.00 avg-zkey = 1.92 avg-val = 122.93 avg-zval = 40.54 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 466251 bytes = 1457056 } seq expand size = 3263757 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0093 GB value = 0.0541 GB dict = 0.54 MB all = 0.0671 GB } __ZipSize{ index = 0.0009 GB value = 0.0189 GB dict = 0.54 MB all = 0.0218 GB } UnZip/Zip{ index = 10.4342 value = 2.8594 dict = 1.00 all = 3.0779 } Zip/UnZip{ index = 0.0958 value = 0.3497 dict = 1.00 all = 0.3249 } ---------------------------- total value len = 62.354067 GB avg = 0.180 KB (by entry num) total key len = 6.801813 GB avg = 0.020 KB total ukey len = 3.198832 GB avg = 0.008 KB total ukey num = 0.389799812 Billion total entry num = 0.346677820 Billion write speed all = 0.920917372 MB/sec (with seq num) write speed all = 0.883984966 MB/sec (without seq num) 2024/08/20-14:25:35.789197 140500112176704 [compaction_job.cc:1944] [default] [JOB 34346] Generated table #14668873: 466251 keys, 21803650 bytes, temperature: kWarm 2024/08/20-14:25:35.789302 140500112176704 EVENT_LOG_v1 {"time_micros": 1724135135789239, "cf_name": "default", "job": 34346, "event": "table_file_creation", "file_number": 14668873, "file_size": 21803650, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 190628421764, "largest_seqno": 190656750653, "table_properties": {"data_size": 18904144, "index_size": 893696, "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": 13055028, "raw_average_key_size": 28, "raw_value_size": 54053926, "raw_average_value_size": 115, "num_data_blocks": 1, "num_entries": 466251, "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": 1724135132, "oldest_key_time": 0, "file_creation_time": 1724135132, "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": 14668873, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-14:25:35.819879 140500112176704 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668874.sst) /dev/shm/ToplingTemp/Topling-385178-R9Vi1w 2024/08/20-14:25:36.112757 140500112176704 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668874.sst): first pass time = 0.29's, 105.659'MB/sec 2024/08/20-14:25:38.574410 140500112176704 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668874.sst): old prealloc_size = 41984342, real_size = 9258368 2024/08/20-14:25:38.574628 140500112176704 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668874.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 213964 prefix = 4 raw-key = 0.0034 GB zip-key = 0.0004 GB avg-key = 16.00 avg-zkey = 1.91 raw-val = 0.0249 GB zip-val = 0.0088 GB avg-val = 116.59 avg-zval = 41.11 2024/08/20-14:25:38.574860 140500112176704 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668874.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0005 GB, waited 0.000 sec, Key+Value = 0.031 GB 2024/08/20-14:25:38.943253 140500112176704 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00/14668874.sst): second pass time = 2.46's, 10.138'MB/sec, value only(80.6% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.37's, 27.549'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2145.169'MB/sec (index lex order gen) rebuild zvType time = 0.25's, 0.213'MB/sec write SST data time = 0.12's, 86.490'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.258'MB, throughput = 5451.452'MB/sec zip my value time = 2.46's, unzip length = 0.025'GB zip my value throughput = 10.138'MB/sec zip pipeline throughput = 112.843'MB/sec entries = 213964 avg-key = 28.00 avg-zkey = 1.91 avg-val = 116.59 avg-zval = 41.11 usrkeys = 213964 avg-key = 20.00 avg-zkey = 1.91 avg-val = 123.59 avg-zval = 41.11 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 213964 bytes = 695392 } seq expand size = 1497748 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0043 GB value = 0.0249 GB dict = 0.26 MB all = 0.0309 GB } __ZipSize{ index = 0.0004 GB value = 0.0088 GB dict = 0.26 MB all = 0.0102 GB } UnZip/Zip{ index = 10.4802 value = 2.8360 dict = 1.00 all = 3.0448 } Zip/UnZip{ index = 0.0954 value = 0.3526 dict = 1.00 all = 0.3284 } ---------------------------- total value len = 62.380512 GB avg = 0.180 KB (by entry num) total key len = 6.807804 GB avg = 0.020 KB total ukey len = 3.203112 GB avg = 0.008 KB total ukey num = 0.390013776 Billion total entry num = 0.346891784 Billion write speed all = 0.921310214 MB/sec (with seq num) write speed all = 0.884356582 MB/sec (without seq num) 2024/08/20-14:25:38.969916 140500112176704 [compaction_job.cc:1944] [default] [JOB 34346] Generated table #14668874: 213964 keys, 10160812 bytes, temperature: kWarm 2024/08/20-14:25:38.970012 140500112176704 EVENT_LOG_v1 {"time_micros": 1724135138969965, "cf_name": "default", "job": 34346, "event": "table_file_creation", "file_number": 14668874, "file_size": 10160812, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 190601978919, "largest_seqno": 190656750378, "table_properties": {"data_size": 8796400, "index_size": 408320, "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": 5990992, "raw_average_key_size": 28, "raw_value_size": 24946724, "raw_average_value_size": 116, "num_data_blocks": 1, "num_entries": 213964, "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": 1724135135, "oldest_key_time": 0, "file_creation_time": 1724135135, "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": 14668874, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-14:25:38.984745 140500112176704 [compaction_job.cc:699] job-34346: subcompact[0], size: 0.031964 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-34346/att-00 [14668873,14668874] 2024/08/20-14:25:39.008836 140500112176704 (Original Log Time 2024/08/20-14:25:31.979165) EVENT_LOG_v1 {"time_micros": 1724135131979111, "job": 34346, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L1": [14668847], "files_L2": [14668834, 14668835], "score": 0.999797, "input_data_size": 38167584, "oldest_snapshot_seqno": 190656765456} 2024/08/20-14:25:39.008841 140500112176704 (Original Log Time 2024/08/20-14:25:39.008347) [compaction_job.cc:2018] [default] [JOB 34346] Compacted 1@1 + 2@2 files to L2 => 31964462 bytes 2024/08/20-14:25:39.008844 140500112176704 (Original Log Time 2024/08/20-14:25:39.008750) [compaction_job.cc:1220] [default] compacted to: files[0 0 2 0 0 0 0] max score 0.01, MB/sec: 5.4 rd, 4.6 wr, level 2, files in(1, 2) out(2 +0 blob) MB in(8.5, 27.9 +0.0 blob) out(30.5 +0.0 blob), read-write-amplify(7.9) write-amplify(3.6) OK, records in: 680215, records dropped: 0 output_compression: Snappy 2024/08/20-14:25:39.008855 140500112176704 (Original Log Time 2024/08/20-14:25:39.008808) EVENT_LOG_v1 {"time_micros": 1724135139008781, "cf": "default", "job": 34346, "event": "compaction_finished", "compaction_time_micros": 7005592, "compaction_time_cpu_micros": 1453035, "output_level": 2, "num_output_files": 2, "total_output_size": 31964462, "num_input_records": 680215, "num_output_records": 680215, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 32405165, "file_range_sync_nanos": 0, "file_fsync_nanos": 2012, "file_prepare_write_nanos": 17744, "lsm_state": [0, 0, 2, 0, 0, 0, 0]} 2024/08/20-14:25:39.147642 140500112176704 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":1724135131,"executesMs":7123,"compactionJobId":34346,"attempt":0,"compactionInputRawBytes":98046670,"compactionInputZipBytes":38167584,"compactionOutputRawBytes":0,"compactionOutputZipBytes":31964462,"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":"00-4c5507f36c68e7d03840948e7651c500-e575c06473282292-00"}}, response = 2024/08/20-14:25:39.147745 140500112176704 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-34346/att-00: olev 2, work 7.124 s, result 10.021 ms, install 0.537 ms, input{raw 93.505 MiB zip 36.399 MiB}