2024/08/20-14:47:49.978554 140500565382720 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00: fork to child time = 0.044992 sec 2024/08/20-14:47:49.979522 140500565382720 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00 2024/08/20-14:47:49.984227 140500565382720 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00 2024/08/20-14:47:49.990592 140500565382720 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-14:47:49.990900 140500565382720 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-14:47:50.030786 140500565382720 [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-35281/att-00/MANIFEST-14629260 2024/08/20-14:47:50.044586 140500565382720 [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-35281/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14669944, last_sequence is 190679943466, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14669816 2024/08/20-14:47:50.044593 140500565382720 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-14:47:50.044658 140500565382720 [version_set.cc:5652] Creating manifest 14669944 2024/08/20-14:47:50.068894 140500565382720 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-14:47:50.082058 140500565382720 [compaction_job.cc:2433] [default] [JOB 35281] Compacting 1@2 + 2@3 files to L3, score 0.99, subcompactions 1 : 1 2024/08/20-14:47:50.082071 140500565382720 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 18035 Base level 2, inputs: [14669921(20MB)], [14669876(97MB) 14669877(49MB)] 2024/08/20-14:47:50.409437 140500565382720 [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 2024/08/20-14:47:50.409458 140500565382720 [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 2024/08/20-14:47:50.409475 140500565382720 [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 2024/08/20-14:47:50.409486 140500565382720 [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 2024/08/20-14:47:50.409505 140500565382720 [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 2024/08/20-14:47:51.320534 140500565382720 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669945.sst) /dev/shm/ToplingTemp/Topling-392286-fnRLxZ 2024/08/20-14:47:51.820437 140500565382720 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669945.sst): first pass time = 0.50's, 268.728'MB/sec 2024/08/20-14:47:57.285572 140500565382720 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669945.sst): old prealloc_size = 147639500, real_size = 100281840 2024/08/20-14:47:57.285799 140500565382720 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669945.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 197698 prefix = 4 raw-key = 0.0024 GB zip-key = 0.0004 GB avg-key = 12.00 avg-zkey = 1.89 raw-val = 0.1295 GB zip-val = 0.0999 GB avg-val = 654.90 avg-zval = 505.11 2024/08/20-14:47:57.286095 140500565382720 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669945.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0004 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-14:47:57.823012 140500565382720 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669945.sst): second pass time = 5.46's, 23.696'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.54's, 190.385'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2084.667'MB/sec (index lex order gen) rebuild zvType time = 0.44's, 0.114'MB/sec write SST data time = 0.10's, 1003.687'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 = 29803.975'MB/sec zip my value time = 5.46's, unzip length = 0.129'GB zip my value throughput = 23.696'MB/sec zip pipeline throughput = 138.919'MB/sec entries = 197698 avg-key = 24.00 avg-zkey = 1.89 avg-val = 654.90 avg-zval = 505.11 usrkeys = 197698 avg-key = 16.00 avg-zkey = 1.89 avg-val = 661.90 avg-zval = 505.11 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 197698 bytes = 741376 } seq expand size = 1383886 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 = 8.4776 value = 1.2966 dict = 1.00 all = 1.3117 } Zip/UnZip{ index = 0.1180 value = 0.7713 dict = 1.00 all = 0.7624 } ---------------------------- total value len = 62.427607 GB avg = 0.180 KB (by entry num) total key len = 6.793502 GB avg = 0.020 KB total ukey len = 3.192671 GB avg = 0.008 KB total ukey num = 0.389531259 Billion total entry num = 0.346409267 Billion write speed all = 0.905601384 MB/sec (with seq num) write speed all = 0.869345541 MB/sec (without seq num) 2024/08/20-14:47:57.958594 140500565382720 [compaction_job.cc:1944] [default] [JOB 35281] Generated table #14669945: 197698 keys, 102324737 bytes, temperature: kWarm 2024/08/20-14:47:57.958713 140500565382720 EVENT_LOG_v1 {"time_micros": 1724136477958645, "cf_name": "default", "job": 35281, "event": "table_file_creation", "file_number": 14669945, "file_size": 102324737, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189648517461, "largest_seqno": 190679928420, "table_properties": {"data_size": 99859104, "index_size": 373120, "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": 4744752, "raw_average_key_size": 24, "raw_value_size": 129473275, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 197698, "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": 1724136471, "oldest_key_time": 0, "file_creation_time": 1724136471, "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": 14669945, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-14:47:58.076181 140500565382720 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669946.sst) /dev/shm/ToplingTemp/Topling-392286-0RqSW0 2024/08/20-14:47:58.707656 140500565382720 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669946.sst): first pass time = 0.63's, 111.596'MB/sec 2024/08/20-14:48:00.906026 140500565382720 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669946.sst): old prealloc_size = 147639500, real_size = 52852832 2024/08/20-14:48:00.906177 140500565382720 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669946.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 103766 prefix = 4 raw-key = 0.0012 GB zip-key = 0.0002 GB avg-key = 12.00 avg-zkey = 1.94 raw-val = 0.0680 GB zip-val = 0.0526 GB avg-val = 655.07 avg-zval = 507.15 2024/08/20-14:48:00.906328 140500565382720 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669946.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0002 GB, waited 0.000 sec, Key+Value = 0.070 GB 2024/08/20-14:48:01.149872 140500565382720 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00/14669946.sst): second pass time = 2.20's, 30.934'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.24's, 221.071'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1648.082'MB/sec (index lex order gen) rebuild zvType time = 0.19's, 0.136'MB/sec write SST data time = 0.05's, 1026.788'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.711'MB, throughput = 18386.989'MB/sec zip my value time = 2.20's, unzip length = 0.068'GB zip my value throughput = 30.934'MB/sec zip pipeline throughput = 123.414'MB/sec entries = 103766 avg-key = 24.00 avg-zkey = 1.94 avg-val = 655.07 avg-zval = 507.15 usrkeys = 103766 avg-key = 16.00 avg-zkey = 1.94 avg-val = 662.07 avg-zval = 507.15 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 103766 bytes = 363200 } seq expand size = 726362 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0017 GB value = 0.0680 GB dict = 0.71 MB all = 0.0705 GB } __ZipSize{ index = 0.0002 GB value = 0.0526 GB dict = 0.71 MB all = 0.0539 GB } UnZip/Zip{ index = 8.2354 value = 1.2917 dict = 1.00 all = 1.3072 } Zip/UnZip{ index = 0.1214 value = 0.7742 dict = 1.00 all = 0.7650 } ---------------------------- total value len = 62.496307 GB avg = 0.180 KB (by entry num) total key len = 6.795993 GB avg = 0.020 KB total ukey len = 3.194331 GB avg = 0.008 KB total ukey num = 0.389635025 Billion total entry num = 0.346513033 Billion write speed all = 0.906493293 MB/sec (with seq num) write speed all = 0.870228168 MB/sec (without seq num) 2024/08/20-14:48:01.217416 140500565382720 [compaction_job.cc:1944] [default] [JOB 35281] Generated table #14669946: 103766 keys, 53903611 bytes, temperature: kWarm 2024/08/20-14:48:01.217506 140500565382720 EVENT_LOG_v1 {"time_micros": 1724136481217453, "cf_name": "default", "job": 35281, "event": "table_file_creation", "file_number": 14669946, "file_size": 53903611, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 190544032005, "largest_seqno": 190679928714, "table_properties": {"data_size": 52625104, "index_size": 201600, "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": 2490384, "raw_average_key_size": 24, "raw_value_size": 67973524, "raw_average_value_size": 655, "num_data_blocks": 1, "num_entries": 103766, "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": 1724136478, "oldest_key_time": 0, "file_creation_time": 1724136478, "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": 14669946, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-14:48:01.261465 140500565382720 [compaction_job.cc:699] job-35281: subcompact[0], size: 0.156228 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-35281/att-00 [14669945,14669946] 2024/08/20-14:48:01.319455 140500565382720 (Original Log Time 2024/08/20-14:47:50.082133) EVENT_LOG_v1 {"time_micros": 1724136470082084, "job": 35281, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L2": [14669921], "files_L3": [14669876, 14669877], "score": 0.992039, "input_data_size": 175042255, "oldest_snapshot_seqno": 190679943255} 2024/08/20-14:48:01.319460 140500565382720 (Original Log Time 2024/08/20-14:48:01.318959) [compaction_job.cc:2018] [default] [JOB 35281] Compacted 1@2 + 2@3 files to L3 => 156228348 bytes 2024/08/20-14:48:01.319462 140500565382720 (Original Log Time 2024/08/20-14:48:01.319369) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.01, MB/sec: 15.7 rd, 14.0 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(20.1, 146.8 +0.0 blob) out(149.0 +0.0 blob), read-write-amplify(15.7) write-amplify(7.4) OK, records in: 327797, records dropped: 26333 output_compression: Snappy 2024/08/20-14:48:01.319473 140500565382720 (Original Log Time 2024/08/20-14:48:01.319426) EVENT_LOG_v1 {"time_micros": 1724136481319401, "cf": "default", "job": 35281, "event": "compaction_finished", "compaction_time_micros": 11179347, "compaction_time_cpu_micros": 1297241, "output_level": 3, "num_output_files": 2, "total_output_size": 156228348, "num_input_records": 327797, "num_output_records": 301464, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 215600889, "file_range_sync_nanos": 0, "file_fsync_nanos": 1732, "file_prepare_write_nanos": 7066, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-14:48:01.455388 140500565382720 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":1724136469,"executesMs":11333,"compactionJobId":35281,"attempt":0,"compactionInputRawBytes":222562414,"compactionInputZipBytes":175042255,"compactionOutputRawBytes":0,"compactionOutputZipBytes":156228348,"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":"00-3a34eef27ea548404156f1ec92239abb-1c278de1732602eb-00"}}, response = 2024/08/20-14:48:01.455468 140500565382720 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-35281/att-00: olev 3, work 11.334 s, result 6.246 ms, install 0.561 ms, input{raw 212.252 MiB zip 166.933 MiB}