data/system/schema/mlog.txt (元数据日志)
http://iotdb.apache.org/SystemDesign/SchemaManager/SchemaManager.html#log-management-of-metadata
data/system/schema/system.properties (系统不可变参数)
partition_interval=9223372036854775807 timestamp_precision=ms tsfile_storage_fs=LOCAL enable_partition=false max_degree_of_index_node=256 tag_attribute_total_size=700 iotdb_version=UNKNOWN
data/system/schema/tlog.txt (标签、属性文件)
http://iotdb.apache.org/SystemDesign/SchemaManager/SchemaManager.html#tlog
data/system/storage_groups/{sg_name}/{partition}/Version-xxx (每个分区的版本控制文件,无内容)
data/system/storage_groups/upgrade/Version-xxx (升级过程的版本控制文件)
data/system/upgrade/upgrade.txt (升级日志文件)
格式:
oldTsFilePath,UpgradeCheckStatus
示例:
xxx/root.group_11/upgrade/1587634378188-101-0.tsfile,1 xxx/root.group_11/upgrade/1587634378188-101-0.tsfile,2 xxx/root.group_11/upgrade/1587634378188-101-0.tsfile,3 ...
1. username (UTF-8) 2. password (UTF-8) 3. privilegeNumber n (int) 4. n privileges (Privelege) 5. rolNumber k (int) 6. k role names (UTF-8) 7. UseWaterMarkFlag (Boolean)
1. roleName (UTF-8) 2. privilegeNumber n (int) 3. n privileges (Privilege)
Privilege 格式
1. bindingPath (UTF-8) 2. privilegeNumber n (int) 3. n privilegeOrdinals (int)
http://iotdb.apache.org/SystemDesign/TsFile/Format.html#_1-2-tsfile-overview
deviceId(String),start_time(long) deviceId(String),start_time(long) deviceId(String),end_time(long) deviceId(String),end_time(long)
http://iotdb.apache.org/SystemDesign/DataQuery/QueryFundamentals.html#query-with-modifications
data/data/sequence/{storage_group}/{partition}/{tsfile}-{level}-{timestamp}.vm (未封口的 TsFile 文件)
data/data/sequence/{storage_group}/{partition}/{tsfile}.flush (TsFile持久化memtable时的日志文件,无内容)
data/data/sequence/{storage_group}/{partition}/{tsfile}.vm.log (合并 vm 的日志文件)
源文件 文件path 目标文件 文件path device,offset (已经合并的设备和目标文件完整的ChunkGroup的offset)
文件格式为写入执行计划的序列化内容: InsertRowPlan、InsertTabletPlan、DeletePlan
性能追踪选项默认关闭,用户可以使用 TRACING ON/OFF 命令开启/关闭该功能。开启后,追踪日志记录在上述目录下,其格式为:
QueryId - Start time QueryId - Query statement QueryId - Number of series paths QueryId - Number of tsfiles QueryId - Number of sequence files QueryId - Number of unsequence files QueryId - Number of chunks QueryId - Average size of chunks QueryId - End time