2024/07/24-16:05:59.604102 140295214339648 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00: fork to child time = 0.047943 sec 2024/07/24-16:05:59.604872 140295214339648 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00 2024/07/24-16:05:59.608796 140295214339648 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00 2024/07/24-16:05:59.609814 140295214339648 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/07/24-16:05:59.610028 140295214339648 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/07/24-16:05:59.666088 140295214339648 [version_set.cc:6139] Recovering from manifest file: /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-07-23T15.41.52/.rocksdb/job-36716/att-00/MANIFEST-13366722 2024/07/24-16:05:59.692879 140295214339648 [version_set.cc:6182] Recovered from manifest file:/worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-07-23T15.41.52/.rocksdb/job-36716/att-00/MANIFEST-13366722 succeeded,manifest_file_number is 13366722, next_file_number is 13411203, last_sequence is 164133670906, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 13411148 2024/07/24-16:05:59.692888 140295214339648 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/07/24-16:05:59.692958 140295214339648 [version_set.cc:5652] Creating manifest 13411203 2024/07/24-16:05:59.723874 140295214339648 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00: bottommost_level: fake = 1, rpc = 0 2024/07/24-16:05:59.738474 140295214339648 [compaction_job.cc:2433] [default] [JOB 36716] Compacting 1@2 + 2@3 files to L3, score 0.99, subcompactions 1 : 1 2024/07/24-16:05:59.738493 140295214339648 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 19475 Base level 2, inputs: [13411179(15MB)], [13411116(97MB) 13411117(27MB)] 2024/07/24-16:06:00.159040 140295214339648 [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 2024/07/24-16:06:00.159058 140295214339648 [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 2024/07/24-16:06:00.159076 140295214339648 [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 2024/07/24-16:06:00.159086 140295214339648 [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 2024/07/24-16:06:00.159094 140295214339648 [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 2024/07/24-16:06:02.092161 140295214339648 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411204.sst) /dev/shm/ToplingTemp/Topling-92817-rf1yiC 2024/07/24-16:06:02.643821 140295214339648 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411204.sst): first pass time = 0.55's, 243.331'MB/sec 2024/07/24-16:06:08.747034 140295214339648 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411204.sst): old prealloc_size = 147639500, real_size = 100346512 2024/07/24-16:06:08.747256 140295214339648 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411204.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 197735 prefix = 4 raw-key = 0.0024 GB zip-key = 0.0004 GB avg-key = 12.00 avg-zkey = 1.96 raw-val = 0.1295 GB zip-val = 0.0999 GB avg-val = 654.78 avg-zval = 505.27 2024/07/24-16:06:08.747518 140295214339648 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411204.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.000 GB, reorder workingMem = 0.0004 GB, waited 0.000 sec, Key+Value = 0.134 GB 2024/07/24-16:06:09.344128 140295214339648 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411204.sst): second pass time = 6.10's, 21.218'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.60's, 171.406'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2170.836'MB/sec (index lex order gen) rebuild zvType time = 0.45's, 0.110'MB/sec write SST data time = 0.15's, 690.527'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 1.351'MB, throughput = 40410.999'MB/sec zip my value time = 6.10's, unzip length = 0.129'GB zip my value throughput = 21.218'MB/sec zip pipeline throughput = 149.377'MB/sec entries = 197735 avg-key = 24.00 avg-zkey = 1.96 avg-val = 654.78 avg-zval = 505.27 usrkeys = 197735 avg-key = 16.00 avg-zkey = 1.96 avg-val = 661.78 avg-zval = 505.27 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 197735 bytes = 692080 } seq expand size = 1384145 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 = 8.1722 value = 1.2959 dict = 1.00 all = 1.3115 } Zip/UnZip{ index = 0.1224 value = 0.7717 dict = 1.00 all = 0.7625 } ---------------------------- total value len = 0.130857 GB avg = 0.662 KB (by entry num) total key len = 0.004746 GB avg = 0.024 KB total ukey len = 0.003164 GB avg = 0.016 KB total ukey num = 0.000197735 Billion total entry num = 0.000197735 Billion write speed all = 0.004969987 MB/sec (with seq num) write speed all = 0.004912010 MB/sec (without seq num) 2024/07/24-16:06:09.482683 140295214339648 [compaction_job.cc:1944] [default] [JOB 36716] Generated table #13411204: 197735 keys, 102343143 bytes, temperature: kWarm 2024/07/24-16:06:09.482893 140295214339648 EVENT_LOG_v1 {"time_micros": 1721808369482827, "cf_name": "default", "job": 36716, "event": "table_file_creation", "file_number": 13411204, "file_size": 102343143, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 163911425729, "largest_seqno": 164133656992, "table_properties": {"data_size": 99909760, "index_size": 387136, "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": 4745640, "raw_average_key_size": 24, "raw_value_size": 129472551, "raw_average_value_size": 654, "num_data_blocks": 1, "num_entries": 197735, "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": 1721808362, "oldest_key_time": 0, "file_creation_time": 1721808362, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "FDMKK73D6HWPO0XETTGC", "orig_file_number": 13411204, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/07/24-16:06:09.565991 140295214339648 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411205.sst) /dev/shm/ToplingTemp/Topling-92817-SO0pYA 2024/07/24-16:06:10.066551 140295214339648 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411205.sst): first pass time = 0.50's, 78.187'MB/sec 2024/07/24-16:06:11.144452 140295214339648 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411205.sst): old prealloc_size = 147639500, real_size = 29500256 2024/07/24-16:06:11.144564 140295214339648 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411205.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 57607 prefix = 4 raw-key = 0.0007 GB zip-key = 0.0001 GB avg-key = 12.00 avg-zkey = 1.92 raw-val = 0.0377 GB zip-val = 0.0294 GB avg-val = 655.30 avg-zval = 509.92 2024/07/24-16:06:11.144697 140295214339648 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411205.sst: sumWaitingMem = 0.000 GB, sumWorkingMem = 0.000 GB, reorder workingMem = 0.0001 GB, waited 0.000 sec, Key+Value = 0.039 GB 2024/07/24-16:06:11.240214 140295214339648 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00/13411205.sst): second pass time = 1.08's, 35.050'MB/sec, value only(96.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.10's, 313.983'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 1359.663'MB/sec (index lex order gen) rebuild zvType time = 0.07's, 0.192'MB/sec write SST data time = 0.02's, 1444.457'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.380'MB, throughput = 10890.885'MB/sec zip my value time = 1.08's, unzip length = 0.038'GB zip my value throughput = 35.050'MB/sec zip pipeline throughput = 51.620'MB/sec entries = 57607 avg-key = 24.00 avg-zkey = 1.92 avg-val = 655.30 avg-zval = 509.92 usrkeys = 57607 avg-key = 16.00 avg-zkey = 1.92 avg-val = 662.30 avg-zval = 509.92 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 57607 bytes = 194432 } seq expand size = 403249 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0009 GB value = 0.0377 GB dict = 0.38 MB all = 0.0391 GB } __ZipSize{ index = 0.0001 GB value = 0.0294 GB dict = 0.38 MB all = 0.0301 GB } UnZip/Zip{ index = 8.3199 value = 1.2851 dict = 1.00 all = 1.3017 } Zip/UnZip{ index = 0.1202 value = 0.7781 dict = 1.00 all = 0.7682 } ---------------------------- total value len = 0.169010 GB avg = 0.662 KB (by entry num) total key len = 0.006128 GB avg = 0.024 KB total ukey len = 0.004085 GB avg = 0.016 KB total ukey num = 0.000255342 Billion total entry num = 0.000255342 Billion write speed all = 0.006418562 MB/sec (with seq num) write speed all = 0.006343699 MB/sec (without seq num) 2024/07/24-16:06:11.360389 140295214339648 [compaction_job.cc:1944] [default] [JOB 36716] Generated table #13411205: 57607 keys, 30061571 bytes, temperature: kWarm 2024/07/24-16:06:11.360448 140295214339648 EVENT_LOG_v1 {"time_micros": 1721808371360415, "cf_name": "default", "job": 36716, "event": "table_file_creation", "file_number": 13411205, "file_size": 30061571, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 164038710788, "largest_seqno": 164133656632, "table_properties": {"data_size": 29374864, "index_size": 110784, "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": 1382568, "raw_average_key_size": 24, "raw_value_size": 37749622, "raw_average_value_size": 655, "num_data_blocks": 1, "num_entries": 57607, "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": 1721808369, "oldest_key_time": 0, "file_creation_time": 1721808369, "slow_compression_estimated_data_size": 0, "fast_compression_estimated_data_size": 0, "db_id": "a007a635-5c0a-4b4a-be96-b9c695cb016b", "db_session_id": "FDMKK73D6HWPO0XETTGC", "orig_file_number": 13411205, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/07/24-16:06:11.376622 140295214339648 [compaction_job.cc:699] job-36716: subcompact[0], size: 0.132405 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-36716/att-00 [13411204,13411205] 2024/07/24-16:06:11.431164 140295214339648 (Original Log Time 2024/07/24-16:05:59.738567) EVENT_LOG_v1 {"time_micros": 1721808359738510, "job": 36716, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L2": [13411179], "files_L3": [13411116, 13411117], "score": 0.994555, "input_data_size": 146699144, "oldest_snapshot_seqno": 164133670570} 2024/07/24-16:06:11.431170 140295214339648 (Original Log Time 2024/07/24-16:06:11.430578) [compaction_job.cc:2018] [default] [JOB 36716] Compacted 1@2 + 2@3 files to L3 => 132404714 bytes 2024/07/24-16:06:11.431172 140295214339648 (Original Log Time 2024/07/24-16:06:11.431075) [compaction_job.cc:1220] [default] compacted to: files[0 0 0 2 0 0 0] max score 0.00, MB/sec: 12.6 rd, 11.4 wr, level 3, files in(1, 2) out(2 +0 blob) MB in(15.1, 124.8 +0.0 blob) out(126.3 +0.0 blob), read-write-amplify(17.6) write-amplify(8.4) OK, records in: 275427, records dropped: 20085 output_compression: Snappy 2024/07/24-16:06:11.431185 140295214339648 (Original Log Time 2024/07/24-16:06:11.431137) EVENT_LOG_v1 {"time_micros": 1721808371431111, "cf": "default", "job": 36716, "event": "compaction_finished", "compaction_time_micros": 11638068, "compaction_time_cpu_micros": 1131297, "output_level": 3, "num_output_files": 2, "total_output_size": 132404714, "num_input_records": 275427, "num_output_records": 255342, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 167714419, "file_range_sync_nanos": 0, "file_fsync_nanos": 2049, "file_prepare_write_nanos": 5447, "lsm_state": [0, 0, 0, 2, 0, 0, 0]} 2024/07/24-16:06:11.624716 140295214339648 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":1721720512,"starts":1721808359,"executesMs":11806,"compactionJobId":36716,"attempt":0,"compactionInputRawBytes":186985558,"compactionInputZipBytes":146699144,"compactionOutputRawBytes":0,"compactionOutputZipBytes":132404714,"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":"00-4f2d2932d15b70e93af9aea5dfc1b07e-3635b7377a86a25e-00"}}, response = 2024/07/24-16:06:11.624819 140295214339648 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-07-23T15.41.52/.rocksdb/job-36716/att-00: olev 3, work 11.807 s, result 19.656 ms, install 0.641 ms, input{raw 178.323 MiB zip 139.903 MiB}