2024/08/20-02:07:19.375356 140500095391296 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00: fork to child time = 0.012948 sec 2024/08/20-02:07:19.376400 140500095391296 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00 2024/08/20-02:07:19.381103 140500095391296 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00 2024/08/20-02:07:19.386863 140500095391296 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-02:07:19.387195 140500095391296 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-02:07:19.445159 140500095391296 [version_set.cc:6139] Recovering from manifest file: /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-19T23.41.30/.rocksdb/job-06634/att-00/MANIFEST-14619535 2024/08/20-02:07:19.470377 140500095391296 [version_set.cc:6182] Recovered from manifest file:/worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-19T23.41.30/.rocksdb/job-06634/att-00/MANIFEST-14619535 succeeded,manifest_file_number is 14619535, next_file_number is 14627570, last_sequence is 189753443274, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14627493 2024/08/20-02:07:19.470389 140500095391296 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-02:07:19.470492 140500095391296 [version_set.cc:5652] Creating manifest 14627570 2024/08/20-02:07:19.501643 140500095391296 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-02:07:19.519804 140500095391296 [compaction_job.cc:2433] [default] [JOB 6634] Compacting 1@2 + 2@3 files to L3, score 1.02, subcompactions 1 : 1 2024/08/20-02:07:19.519824 140500095391296 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 3304 Base level 2, inputs: [14627483(20MB)], [14626416(38MB) 14626417(17MB)] 2024/08/20-02:07:19.527046 140500095391296 [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 2024/08/20-02:07:19.527112 140500095391296 [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 2024/08/20-02:07:19.527154 140500095391296 [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 2024/08/20-02:07:19.527169 140500095391296 [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 2024/08/20-02:07:19.527182 140500095391296 [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 2024/08/20-02:07:20.001374 140500095391296 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627571.sst) /dev/shm/ToplingTemp/Topling-108091-E37Lnw 2024/08/20-02:07:20.639003 140500095391296 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627571.sst): first pass time = 0.64's, 210.518'MB/sec 2024/08/20-02:07:26.729972 140500095391296 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627571.sst): old prealloc_size = 88037123, real_size = 35824064 2024/08/20-02:07:26.730701 140500095391296 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627571.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 923740 prefix = 4 raw-key = 0.0148 GB zip-key = 0.0018 GB avg-key = 16.00 avg-zkey = 1.90 raw-val = 0.1084 GB zip-val = 0.0338 GB avg-val = 117.30 avg-zval = 36.63 2024/08/20-02:07:26.731854 140500095391296 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627571.sst: sumWaitingMem = 0.002 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0023 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/20-02:07:28.228554 140500095391296 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627571.sst): second pass time = 6.09's, 17.792'MB/sec, value only(80.7% of KV) wait indexing time = 0.00's, remap KeyValue time = 1.50's, 26.558'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2581.813'MB/sec (index lex order gen) rebuild zvType time = 1.13's, 0.204'MB/sec write SST data time = 0.37's, 108.108'MB/sec dict compress time = 0.00's, 1082770.000'MB/sec z-dict build time = 0.00's, sample length = 1.083'MB, throughput = 24324.258'MB/sec zip my value time = 6.09's, unzip length = 0.108'GB zip my value throughput = 17.792'MB/sec zip pipeline throughput = 123.396'MB/sec entries = 923740 avg-key = 28.00 avg-zkey = 1.90 avg-val = 117.30 avg-zval = 36.63 usrkeys = 923740 avg-key = 20.00 avg-zkey = 1.90 avg-val = 124.30 avg-zval = 36.63 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 923740 bytes = 3117632 } seq expand size = 6466180 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0185 GB value = 0.1084 GB dict = 1.08 MB all = 0.1342 GB } __ZipSize{ index = 0.0018 GB value = 0.0338 GB dict = 1.08 MB all = 0.0398 GB } UnZip/Zip{ index = 10.5123 value = 3.2023 dict = 1.00 all = 3.3724 } Zip/UnZip{ index = 0.0951 value = 0.3123 dict = 1.00 all = 0.2965 } ---------------------------- total value len = 62.411569 GB avg = 0.180 KB (by entry num) total key len = 6.814622 GB avg = 0.020 KB total ukey len = 3.207982 GB avg = 0.008 KB total ukey num = 0.390257301 Billion total entry num = 0.347135309 Billion write speed all = 2.247091014 MB/sec (with seq num) write speed all = 2.156946562 MB/sec (without seq num) 2024/08/20-02:07:28.281711 140500095391296 [compaction_job.cc:1944] [default] [JOB 6634] Generated table #14627571: 923740 keys, 39799395 bytes, temperature: kWarm 2024/08/20-02:07:28.281830 140500095391296 EVENT_LOG_v1 {"time_micros": 1724090848281757, "cf_name": "default", "job": 6634, "event": "table_file_creation", "file_number": 14627571, "file_size": 39799395, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189640134737, "largest_seqno": 189749648597, "table_properties": {"data_size": 33835504, "index_size": 1757440, "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": 25864720, "raw_average_key_size": 28, "raw_value_size": 108353112, "raw_average_value_size": 117, "num_data_blocks": 1, "num_entries": 923740, "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": 1724090839, "oldest_key_time": 0, "file_creation_time": 1724090839, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "9474K4QZ2QA6TIYF9LEW", "orig_file_number": 14627571, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-02:07:28.329756 140500095391296 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627572.sst) /dev/shm/ToplingTemp/Topling-108091-j02G2u 2024/08/20-02:07:29.521037 140500095391296 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627572.sst): first pass time = 1.19's, 80.325'MB/sec 2024/08/20-02:07:32.164174 140500095391296 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627572.sst): old prealloc_size = 88037123, real_size = 26370048 2024/08/20-02:07:32.164665 140500095391296 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627572.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 658306 prefix = 4 raw-key = 0.0105 GB zip-key = 0.0013 GB avg-key = 16.00 avg-zkey = 1.92 raw-val = 0.0773 GB zip-val = 0.0249 GB avg-val = 117.35 avg-zval = 37.89 2024/08/20-02:07:32.165265 140500095391296 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627572.sst: sumWaitingMem = 0.002 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0016 GB, waited 0.000 sec, Key+Value = 0.096 GB 2024/08/20-02:07:33.072750 140500095391296 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00/14627572.sst): second pass time = 2.64's, 29.235'MB/sec, value only(80.7% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.91's, 32.150'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2683.075'MB/sec (index lex order gen) rebuild zvType time = 0.67's, 0.245'MB/sec write SST data time = 0.24's, 123.078'MB/sec dict compress time = 0.00's, 777842.000'MB/sec z-dict build time = 0.00's, sample length = 0.778'MB, throughput = 23467.145'MB/sec zip my value time = 2.64's, unzip length = 0.077'GB zip my value throughput = 29.235'MB/sec zip pipeline throughput = 116.178'MB/sec entries = 658306 avg-key = 28.00 avg-zkey = 1.92 avg-val = 117.35 avg-zval = 37.89 usrkeys = 658306 avg-key = 20.00 avg-zkey = 1.92 avg-val = 124.35 avg-zval = 37.89 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 658306 bytes = 2221792 } seq expand size = 4608142 multi value expand size = 0 cnt WriteAppend = 14 UnZipSize{ index = 0.0132 GB value = 0.0773 GB dict = 0.78 MB all = 0.0957 GB } __ZipSize{ index = 0.0013 GB value = 0.0249 GB dict = 0.78 MB all = 0.0292 GB } UnZip/Zip{ index = 10.4406 value = 3.0970 dict = 1.00 all = 3.2758 } Zip/UnZip{ index = 0.0958 value = 0.3229 dict = 1.00 all = 0.3053 } ---------------------------- total value len = 62.493429 GB avg = 0.180 KB (by entry num) total key len = 6.833055 GB avg = 0.020 KB total ukey len = 3.221148 GB avg = 0.008 KB total ukey num = 0.390915607 Billion total entry num = 0.347793615 Billion write speed all = 2.249992727 MB/sec (with seq num) write speed all = 2.159691525 MB/sec (without seq num) 2024/08/20-02:07:33.112052 140500095391296 [compaction_job.cc:1944] [default] [JOB 6634] Generated table #14627572: 658306 keys, 29209603 bytes, temperature: kWarm 2024/08/20-02:07:33.112137 140500095391296 EVENT_LOG_v1 {"time_micros": 1724090853112092, "cf_name": "default", "job": 6634, "event": "table_file_creation", "file_number": 14627572, "file_size": 29209603, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189641855077, "largest_seqno": 189749646832, "table_properties": {"data_size": 24944240, "index_size": 1261056, "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": 18432568, "raw_average_key_size": 28, "raw_value_size": 77251856, "raw_average_value_size": 117, "num_data_blocks": 1, "num_entries": 658306, "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": 1724090848, "oldest_key_time": 0, "file_creation_time": 1724090848, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "9474K4QZ2QA6TIYF9LEW", "orig_file_number": 14627572, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-02:07:33.150331 140500095391296 [compaction_job.cc:699] job-06634: subcompact[0], size: 0.069009 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-06634/att-00 [14627571,14627572] 2024/08/20-02:07:33.198506 140500095391296 (Original Log Time 2024/08/20-02:07:19.519914) EVENT_LOG_v1 {"time_micros": 1724090839519842, "job": 6634, "event": "compaction_started", "compaction_reason": "LevelMaxLevelSize", "files_L2": [14627483], "files_L3": [14626416, 14626417], "score": 1.01591, "input_data_size": 80033749, "oldest_snapshot_seqno": 189753442873} 2024/08/20-02:07:33.198512 140500095391296 (Original Log Time 2024/08/20-02:07:33.195081) [compaction_job.cc:2018] [default] [JOB 6634] Compacted 1@2 + 2@3 files to L3 => 69008998 bytes 2024/08/20-02:07:33.198514 140500095391296 (Original Log Time 2024/08/20-02:07:33.198414) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.00, MB/sec: 5.9 rd, 5.1 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(20.1, 56.2 +0.0 blob) out(65.8 +0.0 blob), read-write-amplify(7.1) write-amplify(3.3) OK, records in: 1798861, records dropped: 216815 output_compression: Snappy 2024/08/20-02:07:33.198526 140500095391296 (Original Log Time 2024/08/20-02:07:33.198475) EVENT_LOG_v1 {"time_micros": 1724090853198447, "cf": "default", "job": 6634, "event": "compaction_finished", "compaction_time_micros": 13630427, "compaction_time_cpu_micros": 3487534, "output_level": 3, "num_output_files": 2, "total_output_size": 69008998, "num_input_records": 1798861, "num_output_records": 1582046, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 85046364, "file_range_sync_nanos": 0, "file_fsync_nanos": 2040, "file_prepare_write_nanos": 49603, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/20-02:07:33.352384 140500095391296 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":1724082090,"starts":1724090839,"executesMs":13813,"compactionJobId":6634,"attempt":0,"compactionInputRawBytes":260689986,"compactionInputZipBytes":80033749,"compactionOutputRawBytes":0,"compactionOutputZipBytes":69008998,"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":"00-5c6d92280fb05b226c380412d22be6ca-cab34a7899dd0330-00"}}, response = 2024/08/20-02:07:33.352500 140500095391296 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-19T23.41.30/.rocksdb/job-06634/att-00: olev 3, work 13.813 s, result 6.345 ms, install 3.480 ms, input{raw 248.613 MiB zip 76.326 MiB}