2024/08/21-03:57:43.550828 140539450512960 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00: fork to child time = 0.008267 sec 2024/08/21-03:57:43.551616 140539450512960 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00 2024/08/21-03:57:43.556042 140539450512960 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00 2024/08/21-03:57:43.556956 140539450512960 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/21-03:57:43.557224 140539450512960 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/21-03:57:43.591014 140539450512960 [version_set.cc:6139] Recovering from manifest file: /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-21T03.54.18/.rocksdb/job-00124/att-00/MANIFEST-14703553 2024/08/21-03:57:43.646152 140539450512960 [version_set.cc:6182] Recovered from manifest file:/worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-21T03.54.18/.rocksdb/job-00124/att-00/MANIFEST-14703553 succeeded,manifest_file_number is 14703553, next_file_number is 14703710, last_sequence is 191420991846, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14703491 2024/08/21-03:57:43.646164 140539450512960 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/21-03:57:43.646237 140539450512960 [version_set.cc:5652] Creating manifest 14703710 2024/08/21-03:57:43.669318 140539450512960 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/21-03:57:43.683528 140539450512960 [compaction_job.cc:2433] [default] [JOB 124] Compacting 1@2 + 2@3 files to L3, score 1.01, subcompactions 1 : 1 2024/08/21-03:57:43.683539 140539450512960 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 76 Base level 2, inputs: [14703706(20MB)], [14703690(10196KB) 14702697(38MB)] 2024/08/21-03:57:43.688692 140539450512960 [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 2024/08/21-03:57:43.688720 140539450512960 [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 2024/08/21-03:57:43.688741 140539450512960 [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 2024/08/21-03:57:43.688749 140539450512960 [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 2024/08/21-03:57:43.688757 140539450512960 [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 2024/08/21-03:57:43.912721 140539450512960 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703711.sst) /dev/shm/ToplingTemp/Topling-49472-hDUP23 2024/08/21-03:57:44.754209 140539450512960 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703711.sst): first pass time = 0.84's, 159.511'MB/sec 2024/08/21-03:57:46.109039 140539450512960 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703711.sst): old prealloc_size = 79366925, real_size = 37211104 2024/08/21-03:57:46.109593 140539450512960 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703711.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 934246 prefix = 4 raw-key = 0.0149 GB zip-key = 0.0018 GB avg-key = 16.00 avg-zkey = 1.90 raw-val = 0.1081 GB zip-val = 0.0352 GB avg-val = 115.66 avg-zval = 37.68 2024/08/21-03:57:46.110439 140539450512960 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703711.sst: sumWaitingMem = 0.002 GB, sumWorkingMem = 0.000 GB, reorder workingMem = 0.0023 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/08/21-03:57:46.912291 140539450512960 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703711.sst): second pass time = 1.35's, 79.816'MB/sec, value only(80.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.80's, 51.607'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 3335.992'MB/sec (index lex order gen) rebuild zvType time = 0.68's, 0.346'MB/sec write SST data time = 0.13's, 325.975'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.079'MB, throughput = 34493.413'MB/sec zip my value time = 1.35's, unzip length = 0.108'GB zip my value throughput = 79.816'MB/sec zip pipeline throughput = 79.816'MB/sec entries = 934246 avg-key = 28.00 avg-zkey = 1.90 avg-val = 115.66 avg-zval = 37.68 usrkeys = 934246 avg-key = 20.00 avg-zkey = 1.90 avg-val = 122.66 avg-zval = 37.68 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 934246 bytes = 3386656 } seq expand size = 6539722 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0187 GB value = 0.1081 GB dict = 1.08 MB all = 0.1342 GB } __ZipSize{ index = 0.0018 GB value = 0.0352 GB dict = 1.08 MB all = 0.0415 GB } UnZip/Zip{ index = 10.5113 value = 3.0699 dict = 1.00 all = 3.2379 } Zip/UnZip{ index = 0.0951 value = 0.3257 dict = 1.00 all = 0.3088 } ---------------------------- total value len = 0.114599 GB avg = 0.123 KB (by entry num) total key len = 0.026159 GB avg = 0.028 KB total ukey len = 0.018685 GB avg = 0.020 KB total ukey num = 0.000934246 Billion total entry num = 0.000934246 Billion write speed all = 0.015036898 MB/sec (with seq num) write speed all = 0.014238466 MB/sec (without seq num) 2024/08/21-03:57:46.965369 140539450512960 [compaction_job.cc:1944] [default] [JOB 124] Generated table #14703711: 934246 keys, 41452455 bytes, temperature: kWarm 2024/08/21-03:57:46.965456 140539450512960 EVENT_LOG_v1 {"time_micros": 1724183866965407, "cf_name": "default", "job": 124, "event": "table_file_creation", "file_number": 14703711, "file_size": 41452455, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 191091309054, "largest_seqno": 191418594653, "table_properties": {"data_size": 35199760, "index_size": 1777600, "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": 26158888, "raw_average_key_size": 28, "raw_value_size": 108058948, "raw_average_value_size": 115, "num_data_blocks": 1, "num_entries": 934246, "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": 1724183863, "oldest_key_time": 0, "file_creation_time": 1724183863, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "XFTNAHLNNCOKU0GJCCPH", "orig_file_number": 14703711, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/21-03:57:46.995683 140539450512960 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703712.sst) /dev/shm/ToplingTemp/Topling-49472-9n7IH4 2024/08/21-03:57:47.403016 140539450512960 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703712.sst): first pass time = 0.41's, 243.340'MB/sec 2024/08/21-03:57:48.413057 140539450512960 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703712.sst): old prealloc_size = 79366925, real_size = 27110976 2024/08/21-03:57:48.413536 140539450512960 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703712.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 688799 prefix = 4 raw-key = 0.0110 GB zip-key = 0.0013 GB avg-key = 16.00 avg-zkey = 1.92 raw-val = 0.0798 GB zip-val = 0.0256 GB avg-val = 115.89 avg-zval = 37.19 2024/08/21-03:57:48.414147 140539450512960 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703712.sst: sumWaitingMem = 0.002 GB, sumWorkingMem = 0.000 GB, reorder workingMem = 0.0017 GB, waited 0.000 sec, Key+Value = 0.099 GB 2024/08/21-03:57:49.014414 140539450512960 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00/14703712.sst): second pass time = 1.01's, 79.101'MB/sec, value only(80.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.60's, 50.290'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2962.307'MB/sec (index lex order gen) rebuild zvType time = 0.51's, 0.340'MB/sec write SST data time = 0.09's, 322.636'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.802'MB, throughput = 17882.190'MB/sec zip my value time = 1.01's, unzip length = 0.080'GB zip my value throughput = 79.101'MB/sec zip pipeline throughput = 79.101'MB/sec entries = 688799 avg-key = 28.00 avg-zkey = 1.92 avg-val = 115.89 avg-zval = 37.19 usrkeys = 688799 avg-key = 20.00 avg-zkey = 1.92 avg-val = 122.89 avg-zval = 37.19 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 688799 bytes = 2496912 } seq expand size = 4821593 multi value expand size = 0 cnt WriteAppend = 13 UnZipSize{ index = 0.0138 GB value = 0.0798 GB dict = 0.80 MB all = 0.0991 GB } __ZipSize{ index = 0.0013 GB value = 0.0256 GB dict = 0.80 MB all = 0.0302 GB } UnZip/Zip{ index = 10.4419 value = 3.1159 dict = 1.00 all = 3.2773 } Zip/UnZip{ index = 0.0958 value = 0.3209 dict = 1.00 all = 0.3051 } ---------------------------- total value len = 0.199247 GB avg = 0.123 KB (by entry num) total key len = 0.045445 GB avg = 0.028 KB total ukey len = 0.032461 GB avg = 0.020 KB total ukey num = 0.001623045 Billion total entry num = 0.001623045 Billion write speed all = 0.026134208 MB/sec (with seq num) write speed all = 0.024747422 MB/sec (without seq num) 2024/08/21-03:57:49.058518 140539450512960 [compaction_job.cc:1944] [default] [JOB 124] Generated table #14703712: 688799 keys, 30242389 bytes, temperature: kWarm 2024/08/21-03:57:49.058590 140539450512960 EVENT_LOG_v1 {"time_micros": 1724183869058555, "cf_name": "default", "job": 124, "event": "table_file_creation", "file_number": 14703712, "file_size": 30242389, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 191091308293, "largest_seqno": 191393041224, "table_properties": {"data_size": 25619312, "index_size": 1319296, "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": 19286372, "raw_average_key_size": 28, "raw_value_size": 79826794, "raw_average_value_size": 115, "num_data_blocks": 1, "num_entries": 688799, "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": 1724183866, "oldest_key_time": 0, "file_creation_time": 1724183866, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "XFTNAHLNNCOKU0GJCCPH", "orig_file_number": 14703712, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/21-03:57:49.082316 140539450512960 [compaction_job.cc:699] job-00124: subcompact[0], size: 0.071695 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-00124/att-00 [14703711,14703712] 2024/08/21-03:57:49.098721 140539450512960 (Original Log Time 2024/08/21-03:57:43.683587) EVENT_LOG_v1 {"time_micros": 1724183863683547, "job": 124, "event": "compaction_started", "compaction_reason": "LevelMaxLevelSize", "files_L2": [14703706], "files_L3": [14703690, 14702697], "score": 1.01306, "input_data_size": 72151750, "oldest_snapshot_seqno": 191420990351} 2024/08/21-03:57:49.098725 140539450512960 (Original Log Time 2024/08/21-03:57:49.098290) [compaction_job.cc:2018] [default] [JOB 124] Compacted 1@2 + 2@3 files to L3 => 71694844 bytes 2024/08/21-03:57:49.098726 140539450512960 (Original Log Time 2024/08/21-03:57:49.098662) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.00, MB/sec: 13.4 rd, 13.3 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(20.4, 48.4 +0.0 blob) out(68.4 +0.0 blob), read-write-amplify(6.7) write-amplify(3.3) OK, records in: 1623045, records dropped: 0 output_compression: Snappy 2024/08/21-03:57:49.098733 140539450512960 (Original Log Time 2024/08/21-03:57:49.098704) EVENT_LOG_v1 {"time_micros": 1724183869098686, "cf": "default", "job": 124, "event": "compaction_finished", "compaction_time_micros": 5398740, "compaction_time_cpu_micros": 2405106, "output_level": 3, "num_output_files": 2, "total_output_size": 71694844, "num_input_records": 1623045, "num_output_records": 1623045, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 49632370, "file_range_sync_nanos": 0, "file_fsync_nanos": 1565, "file_prepare_write_nanos": 4835, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/08/21-03:57:49.212763 140539450512960 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":1724183658,"starts":1724183863,"executesMs":5542,"compactionJobId":124,"attempt":0,"compactionInputRawBytes":233331002,"compactionInputZipBytes":72151750,"compactionOutputRawBytes":0,"compactionOutputZipBytes":71694844,"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":"00-957db0351d0ec9467da3fb3d34fe8fe7-4a91b3a0cd35591c-00"}}, response = 2024/08/21-03:57:49.212836 140539450512960 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-21T03.54.18/.rocksdb/job-00124/att-00: olev 3, work 5.542 s, result 4.959 ms, install 0.461 ms, input{raw 222.522 MiB zip 68.809 MiB}