2024/08/20-03:26:40.902467 140500473062976 DEBG dcompact_worker.cpp:2211: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00: fork to child time = 0.010152 sec 2024/08/20-03:26:40.903552 140500473062976 DEBG dcompact_worker.cpp:1011: Beg SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00 2024/08/20-03:26:40.908509 140500473062976 DEBG dcompact_worker.cpp:1031: End SerDeRead: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00 2024/08/20-03:26:40.915048 140500473062976 TRAC dcompact_worker.cpp:1081: INFO_LOG_LEVEL: rpc = INFO_LEVEL, env_var = undefined 2024/08/20-03:26:40.915352 140500473062976 [WARN] [column_family.cc:386] multiple cf_paths/db_paths and level_compaction_dynamic_level_bytes can't be used together 2024/08/20-03:26:41.002428 140500473062976 [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-02884/att-00/MANIFEST-14629260 2024/08/20-03:26:41.042998 140500473062976 [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-02884/att-00/MANIFEST-14629260 succeeded,manifest_file_number is 14629260, next_file_number is 14632456, last_sequence is 189859410687, log_number is 0,prev_log_number is 0,max_column_family is 0,min_log_number_to_keep is 14632318 2024/08/20-03:26:41.043006 140500473062976 [version_set.cc:6197] Column family [default] (ID 0), log number is 0 2024/08/20-03:26:41.043080 140500473062976 [version_set.cc:5652] Creating manifest 14632456 2024/08/20-03:26:41.076690 140500473062976 DEBG dcompact_worker.cpp:1215: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00: bottommost_level: fake = 1, rpc = 0 2024/08/20-03:26:41.091760 140500473062976 [compaction_job.cc:2433] [default] [JOB 2884] Compacting 1@1 + 2@2 files to L2, score 0.99, subcompactions 1 : 1 2024/08/20-03:26:41.091773 140500473062976 [compaction_job.cc:2441] [default]: Compaction start summary: Base version 1512 Base level 1, inputs: [14632408(26MB)], [14632454(13MB) 14632355(10MB)] 2024/08/20-03:26:41.283633 140500473062976 [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 2024/08/20-03:26:41.283655 140500473062976 [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 2024/08/20-03:26:41.283673 140500473062976 [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 2024/08/20-03:26:41.283685 140500473062976 [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 2024/08/20-03:26:41.283696 140500473062976 [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 2024/08/20-03:26:41.386858 140500473062976 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632457.sst) /dev/shm/ToplingTemp/Topling-139919-98GsZd 2024/08/20-03:26:41.717909 140500473062976 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632457.sst): first pass time = 0.33's, 202.749'MB/sec 2024/08/20-03:26:43.205942 140500473062976 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632457.sst): old prealloc_size = 57269092, real_size = 19838432 2024/08/20-03:26:43.206302 140500473062976 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632457.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 464353 prefix = 4 raw-key = 0.0074 GB zip-key = 0.0009 GB avg-key = 16.00 avg-zkey = 1.90 raw-val = 0.0541 GB zip-val = 0.0188 GB avg-val = 116.52 avg-zval = 40.57 2024/08/20-03:26:43.206711 140500473062976 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632457.sst: sumWaitingMem = 0.001 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0011 GB, waited 0.000 sec, Key+Value = 0.067 GB 2024/08/20-03:26:43.802722 140500473062976 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632457.sst): second pass time = 1.49's, 36.392'MB/sec, value only(80.6% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.60's, 36.401'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2662.322'MB/sec (index lex order gen) rebuild zvType time = 0.46's, 0.251'MB/sec write SST data time = 0.13's, 161.346'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.544'MB, throughput = 18131.246'MB/sec zip my value time = 1.49's, unzip length = 0.054'GB zip my value throughput = 36.392'MB/sec zip pipeline throughput = 132.172'MB/sec entries = 464353 avg-key = 28.00 avg-zkey = 1.90 avg-val = 116.52 avg-zval = 40.57 usrkeys = 464353 avg-key = 20.00 avg-zkey = 1.90 avg-val = 123.52 avg-zval = 40.57 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 464353 bytes = 1451120 } seq expand size = 3250471 multi value expand size = 0 cnt WriteAppend = 12 UnZipSize{ index = 0.0093 GB value = 0.0541 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 = 10.5053 value = 2.8722 dict = 1.00 all = 3.0893 } Zip/UnZip{ index = 0.0952 value = 0.3482 dict = 1.00 all = 0.3237 } ---------------------------- total value len = 62.354107 GB avg = 0.180 KB (by entry num) total key len = 6.801760 GB avg = 0.020 KB total ukey len = 3.198795 GB avg = 0.008 KB total ukey num = 0.389797914 Billion total entry num = 0.346675922 Billion write speed all = 1.944623464 MB/sec (with seq num) write speed all = 1.866636833 MB/sec (without seq num) 2024/08/20-03:26:43.833014 140500473062976 [compaction_job.cc:1944] [default] [JOB 2884] Generated table #14632457: 464353 keys, 21723068 bytes, temperature: kWarm 2024/08/20-03:26:43.833120 140500473062976 EVENT_LOG_v1 {"time_micros": 1724095603833061, "cf_name": "default", "job": 2884, "event": "table_file_creation", "file_number": 14632457, "file_size": 21723068, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189835262585, "largest_seqno": 189859049392, "table_properties": {"data_size": 18838096, "index_size": 884032, "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": 13001884, "raw_average_key_size": 28, "raw_value_size": 54107058, "raw_average_value_size": 116, "num_data_blocks": 1, "num_entries": 464353, "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": 1724095601, "oldest_key_time": 0, "file_creation_time": 1724095601, "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": 14632457, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-03:26:43.865029 140500473062976 [top_zip_table_builder.cc:934] ToplingZipTableBuilder(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632458.sst) /dev/shm/ToplingTemp/Topling-139919-E7tDwb 2024/08/20-03:26:43.970578 140500473062976 [top_zip_table_builder.cc:1344] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632458.sst): first pass time = 0.11's, 305.279'MB/sec 2024/08/20-03:26:44.361257 140500473062976 [top_zip_table_builder.cc:2764] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632458.sst): old prealloc_size = 57269092, real_size = 9986864 2024/08/20-03:26:44.361461 140500473062976 [top_zip_table_builder.cc:1765] BuildReorderMap(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632458.sst): index type = NestLoudsTrieDAWG_Mixed_XL_256_32_FL, store type = DictZipBlobStore usrkeys = 223792 prefix = 4 raw-key = 0.0036 GB zip-key = 0.0004 GB avg-key = 16.00 avg-zkey = 1.92 raw-val = 0.0259 GB zip-val = 0.0095 GB avg-val = 115.92 avg-zval = 42.45 2024/08/20-03:26:44.361672 140500473062976 [top_zip_table_builder.cc:1295] /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632458.sst: sumWaitingMem = 0.001 GB, sumWorkingMem = 0.020 GB, reorder workingMem = 0.0005 GB, waited 0.000 sec, Key+Value = 0.032 GB 2024/08/20-03:26:44.549836 140500473062976 [top_zip_table_builder.cc:3092] ToplingZipTableBuilder::Finish(/storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00/14632458.sst): second pass time = 0.39's, 66.528'MB/sec, value only(80.5% of KV) wait indexing time = 0.00's, remap KeyValue time = 0.19's, 57.363'MB/sec (all stages of remap) Get OrderMap time = 0.00's, 2399.129'MB/sec (index lex order gen) rebuild zvType time = 0.15's, 0.372'MB/sec write SST data time = 0.04's, 285.584'MB/sec dict compress time = 4356233619.02's, 0.000'MB/sec z-dict build time = 0.00's, sample length = 0.267'MB, throughput = 7761.411'MB/sec zip my value time = 0.39's, unzip length = 0.026'GB zip my value throughput = 66.528'MB/sec zip pipeline throughput = 91.124'MB/sec entries = 223792 avg-key = 28.00 avg-zkey = 1.92 avg-val = 115.92 avg-zval = 42.45 usrkeys = 223792 avg-key = 20.00 avg-zkey = 1.92 avg-val = 122.92 avg-zval = 42.45 TagRS{ kinds = RS_Key0_Tag1 bytes = 0 } TagArray{ size = 223792 bytes = 615440 } seq expand size = 1566544 multi value expand size = 0 cnt WriteAppend = 16 UnZipSize{ index = 0.0045 GB value = 0.0259 GB dict = 0.27 MB all = 0.0322 GB } __ZipSize{ index = 0.0004 GB value = 0.0095 GB dict = 0.27 MB all = 0.0108 GB } UnZip/Zip{ index = 10.4116 value = 2.7304 dict = 1.00 all = 2.9774 } Zip/UnZip{ index = 0.0960 value = 0.3662 dict = 1.00 all = 0.3359 } ---------------------------- total value len = 62.381615 GB avg = 0.180 KB (by entry num) total key len = 6.808026 GB avg = 0.020 KB total ukey len = 3.203270 GB avg = 0.008 KB total ukey num = 0.390021706 Billion total entry num = 0.346899714 Billion write speed all = 1.945532287 MB/sec (with seq num) write speed all = 1.867496952 MB/sec (without seq num) 2024/08/20-03:26:44.567390 140500473062976 [compaction_job.cc:1944] [default] [JOB 2884] Generated table #14632458: 223792 keys, 10817242 bytes, temperature: kWarm 2024/08/20-03:26:44.567452 140500473062976 EVENT_LOG_v1 {"time_micros": 1724095604567420, "cf_name": "default", "job": 2884, "event": "table_file_creation", "file_number": 14632458, "file_size": 10817242, "file_checksum": "", "file_checksum_func_name": "Unknown", "smallest_seqno": 189855629225, "largest_seqno": 189859049964, "table_properties": {"data_size": 9500832, "index_size": 429888, "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": 6266176, "raw_average_key_size": 28, "raw_value_size": 25940964, "raw_average_value_size": 115, "num_data_blocks": 1, "num_entries": 223792, "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": 1724095603, "oldest_key_time": 0, "file_creation_time": 1724095603, "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": 14632458, "seqno_to_time_mapping": "N/A", "__indexstats__": "[...1 records...]"}} 2024/08/20-03:26:44.577584 140500473062976 [compaction_job.cc:699] job-02884: subcompact[0], size: 0.032540 G, files: /storage/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/mytopling/.rocksdb/job-02884/att-00 [14632457,14632458] 2024/08/20-03:26:44.596091 140500473062976 (Original Log Time 2024/08/20-03:26:41.091837) EVENT_LOG_v1 {"time_micros": 1724095601091796, "job": 2884, "event": "compaction_started", "compaction_reason": "FilesMarkedForCompaction", "files_L1": [14632408], "files_L2": [14632454, 14632355], "score": 0.991921, "input_data_size": 52062811, "oldest_snapshot_seqno": 189859410336} 2024/08/20-03:26:44.596094 140500473062976 (Original Log Time 2024/08/20-03:26:44.592941) [compaction_job.cc:2018] [default] [JOB 2884] Compacted 1@1 + 2@2 files to L2 => 32540310 bytes 2024/08/20-03:26:44.596096 140500473062976 (Original Log Time 2024/08/20-03:26:44.596029) [compaction_job.cc:1220] [default] compacted to: files[0 0 2 0 0 0 0] max score 0.01, MB/sec: 14.9 rd, 9.3 wr, level 2, files in(1, 2) out(2 +0 blob) MB in(26.5, 23.1 +0.0 blob) out(31.0 +0.0 blob), read-write-amplify(3.0) write-amplify(1.2) OK, records in: 701125, records dropped: 12980 output_compression: Snappy 2024/08/20-03:26:44.596102 140500473062976 (Original Log Time 2024/08/20-03:26:44.596072) EVENT_LOG_v1 {"time_micros": 1724095604596053, "cf": "default", "job": 2884, "event": "compaction_finished", "compaction_time_micros": 3485727, "compaction_time_cpu_micros": 1145098, "output_level": 2, "num_output_files": 2, "total_output_size": 32540310, "num_input_records": 701125, "num_output_records": 688145, "num_subcompactions": 1, "output_compression": "Snappy", "num_single_delete_mismatches": 0, "num_single_delete_fallthrough": 0, "file_write_nanos": 37397879, "file_range_sync_nanos": 0, "file_fsync_nanos": 1577, "file_prepare_write_nanos": 5592, "lsm_state": [0, 0, 2, 0, 0, 0, 0]} 2024/08/20-03:26:44.720474 140500473062976 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":1724095600,"executesMs":3684,"compactionJobId":2884,"attempt":0,"compactionInputRawBytes":101159242,"compactionInputZipBytes":52062811,"compactionOutputRawBytes":0,"compactionOutputZipBytes":32540310,"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":"00-0896cf3a5b90c53db702461ea36a607f-e1bbe71c9b5ea110-00"}}, response = 2024/08/20-03:26:44.720591 140500473062976 INFO dcompact_worker.cpp:1456: finish /worker/dcompact-log/nfs/i-wz9deglxdazgiryp6ltb_10.57.5.137/2024-08-20T02.42.00/.rocksdb/job-02884/att-00: olev 2, work 3.684 s, result 6.147 ms, install 3.195 ms, input{raw 96.473 MiB zip 49.651 MiB}