2024/08/20-03:33:23.566532 140500170925632 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00: fork to child time = 0.010042 sec 2024/08/20-03:33:23.567589 140500170925632 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00 2024/08/20-03:33:23.572430 140500170925632 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00 2024/08/20-03:33:23.573833 140500170925632 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-03:33:23.574148 140500170925632 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-03:33:23.623026 140500170925632 [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-03308/att-00/MANIFEST-14629260 2024/08/20-03:33:23.671218 140500170925632 [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-03308/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14632957, last_sequence is 189869370472, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14632822 2024/08/20-03:33:23.671232 140500170925632 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-03:33:23.671311 140500170925632 [version_set.cc:5652] Creating manifest 14632957 2024/08/20-03:33:23.707977 140500170925632 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-03:33:23.725730 140500170925632 [compaction_job.cc:2433] [default] [JOB 3308] Compacting 1@1 + 2@2 files to L2, score 1.00, subcompactions 1 : 1 2024/08/20-03:33:23.725750 140500170925632 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 1740 Base level 1, inputs: [14632929(5713KB)], [14632918(20MB) 14632919(211KB)] 2024/08/20-03:33:23.773557 140500170925632 [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 2024/08/20-03:33:23.773584 140500170925632 [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 2024/08/20-03:33:23.773603 140500170925632 [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 2024/08/20-03:33:23.773615 140500170925632 [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 2024/08/20-03:33:23.773625 140500170925632 [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 2024/08/20-03:33:23.923234 140500170925632 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632958.sst) /dev/shm/ToplingTemp/Topling-143257-3VKv1B 2024/08/20-03:33:24.172443 140500170925632 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632958.sst): first pass time = 0.25's, 269.350'MB/sec 2024/08/20-03:33:24.869136 140500170925632 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632958.sst): old prealloc_size = 30531886, real_size = 19854208 2024/08/20-03:33:24.869465 140500170925632 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632958.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 466523 prefix = 4 raw-key = 0.0075 GB zip-key = 0.0009 GB avg-key = 16.00 avg-zkey = 1.92 raw-val = 0.0540 GB zip-val = 0.0188 GB avg-val = 115.85 avg-zval = 40.39 2024/08/20-03:33:24.869877 140500170925632 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632958.sst: sumWaitingMem = 0.001 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0011 GB, waited 0.000 sec, Key+Value = 0.067 GB 2024/08/20-03:33:25.225961 140500170925632 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632958.sst): second pass time = 0.70's, 77.713'MB/sec, value only(80.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.36's, 60.776'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2922.790'MB/sec (index lex order gen) rebuild zvType time = 0.29's, 0.401'MB/sec write SST data time = 0.07's, 330.150'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 = 14095.849'MB/sec zip my value time = 0.70's, unzip length = 0.054'GB zip my value throughput = 77.713'MB/sec zip pipeline throughput = 77.713'MB/sec entries = 466523 avg-key = 28.00 avg-zkey = 1.92 avg-val = 115.85 avg-zval = 40.39 usrkeys = 466523 avg-key = 20.00 avg-zkey = 1.92 avg-val = 122.85 avg-zval = 40.39 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 466523 bytes = 1399584 } seq expand size = 3265661 multi value expand size = 0 cnt WriteAppend = 18 UnZipSize{ index = 0.0093 GB value = 0.0540 GB dict = 0.54 MB all = 0.0671 GB } __ZipSize{ index = 0.0009 GB value = 0.0188 GB dict = 0.54 MB all = 0.0217 GB } UnZip/Zip{ index = 10.4321 value = 2.8682 dict = 1.00 all = 3.0946 } Zip/UnZip{ index = 0.0959 value = 0.3486 dict = 1.00 all = 0.3231 } ---------------------------- total value len = 62.354062 GB avg = 0.180 KB (by entry num) total key len = 6.801820 GB avg = 0.020 KB total ukey len = 3.198838 GB avg = 0.008 KB total ukey num = 0.389800084 Billion total entry num = 0.346678092 Billion write speed all = 1.922918389 MB/sec (with seq num) write speed all = 1.845801747 MB/sec (without seq num) 2024/08/20-03:33:25.254705 140500170925632 [compaction_job.cc:1944] [default] [JOB 3308] Generated table #14632958: 466523 keys, 21685654 bytes, temperature: kWarm 2024/08/20-03:33:25.254937 140500170925632 EVENT_LOG_v1 {"time_micros": 1724096005254877, "cf_name": "default", "job": 3308, "event": "table_file_creation", "file_number": 14632958, "file_size": 21685654, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189855629330, "largest_seqno": 189869348171, "table_properties": {"data_size": 18842992, "index_size": 894400, "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": 13062644, "raw_average_key_size": 28, "raw_value_size": 54046350, "raw_average_value_size": 115, "num_data_blocks": 1, "num_entries": 466523, "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": 1724096003, "oldest_key_time": 0, "file_creation_time": 1724096003, "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": 14632958, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-03:33:25.279431 140500170925632 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632959.sst) /dev/shm/ToplingTemp/Topling-143257-7boKpE 2024/08/20-03:33:25.312460 140500170925632 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632959.sst): first pass time = 0.03's, 194.088'MB/sec 2024/08/20-03:33:25.375684 140500170925632 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632959.sst): old prealloc_size = 30531886, real_size = 2021840 2024/08/20-03:33:25.375786 140500170925632 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632959.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 44551 prefix = 4 raw-key = 0.0007 GB zip-key = 0.0001 GB avg-key = 16.00 avg-zkey = 1.94 raw-val = 0.0052 GB zip-val = 0.0019 GB avg-val = 115.73 avg-zval = 43.19 2024/08/20-03:33:25.375858 140500170925632 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632959.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0001 GB, waited 0.000 sec, Key+Value = 0.006 GB 2024/08/20-03:33:25.411331 140500170925632 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00/14632959.sst): second pass time = 0.06's, 82.514'MB/sec, value only(80.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.04's, 61.334'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1134.665'MB/sec (index lex order gen) rebuild zvType time = 0.03's, 0.385'MB/sec write SST data time = 0.01's, 327.978'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.051'MB, throughput = 1476.811'MB/sec zip my value time = 0.06's, unzip length = 0.005'GB zip my value throughput = 82.514'MB/sec zip pipeline throughput = 82.514'MB/sec entries = 44551 avg-key = 28.00 avg-zkey = 1.94 avg-val = 115.73 avg-zval = 43.19 usrkeys = 44551 avg-key = 20.00 avg-zkey = 1.94 avg-val = 122.73 avg-zval = 43.19 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 44551 bytes = 122528 } seq expand size = 311857 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0009 GB value = 0.0052 GB dict = 0.05 MB all = 0.0064 GB } __ZipSize{ index = 0.0001 GB value = 0.0019 GB dict = 0.05 MB all = 0.0022 GB } UnZip/Zip{ index = 10.3280 value = 2.6794 dict = 1.00 all = 2.9291 } Zip/UnZip{ index = 0.0968 value = 0.3732 dict = 1.00 all = 0.3414 } ---------------------------- total value len = 62.359529 GB avg = 0.180 KB (by entry num) total key len = 6.803068 GB avg = 0.020 KB total ukey len = 3.199729 GB avg = 0.008 KB total ukey num = 0.389844635 Billion total entry num = 0.346722643 Billion write speed all = 1.923095192 MB/sec (with seq num) write speed all = 1.845969038 MB/sec (without seq num) 2024/08/20-03:33:25.425687 140500170925632 [compaction_job.cc:1944] [default] [JOB 3308] Generated table #14632959: 44551 keys, 2186064 bytes, temperature: kWarm 2024/08/20-03:33:25.425744 140500170925632 EVENT_LOG_v1 {"time_micros": 1724096005425713, "cf_name": "default", "job": 3308, "event": "table_file_creation", "file_number": 14632959, "file_size": 2186064, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189865920013, "largest_seqno": 189869347877, "table_properties": {"data_size": 1924224, "index_size": 86272, "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": 1247428, "raw_average_key_size": 28, "raw_value_size": 5155794, "raw_average_value_size": 115, "num_data_blocks": 1, "num_entries": 44551, "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": 1724096005, "oldest_key_time": 0, "file_creation_time": 1724096005, "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": 14632959, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-03:33:25.432624 140500170925632 [compaction_job.cc:699] job-03308: subcompact[0], size: 0.023872 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-03308/att-00 [14632958,14632959] 2024/08/20-03:33:25.445904 140500170925632 (Original Log Time 2024/08/20-03:33:23.725853) EVENT_LOG_v1 {"time_micros": 1724096003725776, "job": 3308, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L1": [14632929], "files_L2": [14632918, 14632919], "score": 0.995419, "input_data_size": 27756260, "oldest_snapshot_seqno": 189869369923} 2024/08/20-03:33:25.445907 140500170925632 (Original Log Time 2024/08/20-03:33:25.445558) [compaction_job.cc:2018] [default] [JOB 3308] Compacted 1@1 + 2@2 files to L2 => 23871718 bytes 2024/08/20-03:33:25.445909 140500170925632 (Original Log Time 2024/08/20-03:33:25.445845) [compaction_job.cc:1220] [default] compacted to: files[0 0 2 0 0 0 0] max score 0.01, MB/sec: 16.3 rd, 14.0 wr, level 2, files in(1, 2) out(2 +0 blob) MB in(5.6, 20.9 +0.0 blob) out(22.8 +0.0 blob), read-write-amplify(8.8) write-amplify(4.1) OK, records in: 511074, records dropped: 0 output_compression: Snappy 2024/08/20-03:33:25.445915 140500170925632 (Original Log Time 2024/08/20-03:33:25.445887) EVENT_LOG_v1 {"time_micros": 1724096005445869, "cf": "default", "job": 3308, "event": "compaction_finished", "compaction_time_micros": 1706774, "compaction_time_cpu_micros": 675050, "output_level": 2, "num_output_files": 2, "total_output_size": 23871718, "num_input_records": 511074, "num_output_records": 511074, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 16830944, "file_range_sync_nanos": 0, "file_fsync_nanos": 1506, "file_prepare_write_nanos": 4672, "lsm_state": [0, 0, 2, 0, 0, 0, 0]} 2024/08/20-03:33:25.578394 140500170925632 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":1724096003,"executesMs":1872,"compactionJobId":3308,"attempt":0,"compactionInputRawBytes":73512216,"compactionInputZipBytes":27756260,"compactionOutputRawBytes":0,"compactionOutputZipBytes":23871718,"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-fe0004ec3d0f248f36c4a3de6e4a761b-b2ed724986cd390d-00"}}, response = 2024/08/20-03:33:25.578492 140500170925632 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-03308/att-00: olev 2, work 1.873 s, result 5.958 ms, install 0.376 ms, input{raw 70.107 MiB zip 26.470 MiB}