(下文链接需要map到conflunece对应的路径)
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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
SchemaFile设计- 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
Schema Manager#TLogdata/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)
格式为:
oldTsFilePath,UpgradeCheckStatus
其中 UpgradeCheckStatus 表示文件的升级状态
...
username (UTF-8) password (UTF-8) privilegeNumber n (int) n privileges (Privelege) rolNumber k (int) k role names (UTF-8) UseWaterMarkFlag (Boolean)
- data/system/roles/<UserID{UserID}.profile> profile (角色信息)
roleName (UTF-8) privilegeNumber n (int) n privileges (Privilege)
...
- data/system/udf/ulog.txt (udf注册信息(UDF 注册信息)
0,DISTINCT,org.apache.iotdb.quality.dprofile.UDTFDistinct (UTF8, 注册 UDF DISTINCT,全类名 org.apache.iotdb.quality.dprofile.UDTFDistinct)
0,HISTOGRAM,org.apache.iotdb.quality.dprofile.UDTFHistogram
0,INTEGRAL,org.apache.iotdb.quality.dprofile.UDAFIntegral
1,DISTINCT (UTF8, 反注册 UDF DISTINCT)
- data/system/udf/tmp (udf框架临时文件(嵌套表达式框架的临时文件夹,用于存储框架在计算时进行内存控制产生的二进制文件,仅在查询执行时有意义)
序列化、反序列化方法可能随版本变动,见 org.apache.iotdb.db.query.udf.datastructure.SerializableList
- data/system/trigger/tlog.bin (触发器注册信息,二进制,格式类 mlog)
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)
...
TsFile 文件格式#2TsFile%E7%9A%84%E6%80%BB%E8%A7%88%E5%9B%BE
...
- data/data/sequence/{storage_group}/{virtual_storage_group_id}/{partition}/{tsfile}.mods (数据修改操作标记)
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Query Fundamentals#QuerywithModifications
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