(下文链接需要map到conflunece对应的路径)
系统文件目录 data/system
data/system/schema/mlog.bin (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}/{vsg_id}/{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
- UpgradeCheckStatus: 表示文件的升级状态
- BEGIN_UPGRADE_FILE(1): 待升级的文件
- AFTER_UPGRADE_FILE(2): 升级后的文件已经封口
- UPGRADE_SUCCESS(3): 完成了旧文件删除,移动新文件
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 ...
- data/system/users/{user_name}.profile (用户信息)
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)
- data/system/roles/ (权限信息)
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)
数据文件目录 data/data
- data/data/sequence/{storage_group}/{virtual_storage_group_id}/{partition}/{timestamp}-{version}-{inner_compaction_times}-{outter_compaction_times}.tsfile (数据文件)
http://iotdb.apache.org/SystemDesign/TsFile/Format.html#_1-2-tsfile-overview
- data/data/sequence/{storage_group}/{virtual_storage_group_id}/{partition}/{tsfile}.resource (对应TsFile的设备时间索引)
deviceId(String),start_time(long) deviceId(String),start_time(long) deviceId(String),end_time(long) deviceId(String),end_time(long)
- data/data/sequence/{storage_group}/{virtual_storage_group_id}/{partition}/{tsfile}.mods (数据修改操作标记)
http://iotdb.apache.org/SystemDesign/DataQuery/QueryFundamentals.html#query-with-modifications
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)
写前日志目录 data/wal
- data/wal/{storage_group}-{tsfile_name}/wal{x} (对应某个 TsFile 的写前日志文件)
文件格式为写入执行计划的序列化内容: InsertRowPlan、InsertTabletPlan、DeletePlan
性能追踪目录 data/tracing
- data/tracing/tracing.txt
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