THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
字节数字节数(bytes) | 原字节 (V2) | 含义 (Meaning) | 改动 (V3 difference) | ||||
---|---|---|---|---|---|---|---|
MAGIC_STRING | 6 | 5473 4669 6c65 | TsFile | ||||
VERSION_NUMBER | 6 | 3030 3030 3032 | 版本号000002(考虑1字节) | version: 000002 | version: 000003版本号改成03 | ||
Chunk Header | 1 | 01 | chunk header marker | 放入Chunk Header中,改名为chunk type,若为05则表示chunk内只有一个page,不包含statisticsMove to Chunk Header,rename to chunk type,05 means there is only one Page in a chunk without statistics | |||
4 | 00 0000 03 | string长度为3 | int 改成 -> varInt | ||||
3 | 73 2e33 | s.3 | |||||
4 | 0000 0053 | chunk的大小是83字节Size of Chunk is 83 bytes | int 改成 -> varInt | ||||
2 | 0003 | 数据类型是floatDatatype is float | short 改成 -> byte | ||||
4 | 0000 0001 | chunk内page的个数 | Number of pages in chunk | remove this field删除 | |||
2 | 0001 | Snappy压缩方法Compression is Snappy | short 改成 byte | ||||
2 | 0006 | GORILLA编码Encoding is GORILLA | short 改成 byte | ||||
Page Header | 4 | 0000 0020 | 解压后page data大小 | 删除?待讨论,如果删除,可能会导致解压时,多一次内存拷贝,建议保留,int 改成 varInt,一个page大小不能超过2G(做检查) | Uncompressed size of page data | ||
4 | 0000 001b | 解压前page data大小Compressed size of page data | int 改成 -> varInt | ||||
Page Statistics | 8 | 0000 0000 0000 0001 | count | long 改成 varInt,记得检查-> varInt | |||
8 | 0000 0000 0000 0001 | start_time | |||||
8 | 0000 0000 0000 0001 | end_time | |||||
4 | 4000 0000 | min_value(bool, text没有text do not has this field) | |||||
4 | 4000 0000 | max_value(bool, text没有text do not has this field) | |||||
4 | 4000 0000 | first_value | |||||
4 | 4000 0000 | last_value | |||||
8 | 4000 0000 0000 0000 | sum(bool, text没有text do not has this field) | bool值需要支持sum,int、bool改成long类型 | ||||
Page Data | 27 | 2004 1800 0d01 047f ff09 0138 0000 0000 0000 0001 0000 0040 c447 f8 | 27字节的数据27 bytes of data | 数据里的int类型,以及string前面的 | |||
Chunk Group Footer | 1 | 00 | marker | 考虑放到前面,改成chunk move to chunk group header | |||
4 | 0000 0010 | 设备名长度size of deviceId | int 改成 → varInt | ||||
16 | 726f 6f74 2e74 7572 6269 6e65 312e 6431 | 设备名字deviceId | |||||
8 | 0000 0000 0000 0069 | chunk group data size | 删除remove | ||||
4 | 0000 0001 | chunk number | 删除remove | ||||
MemTable Version | 1 | 03 | MemTable version marker | remove | |||
8 | 00 0000 0000 0000 65 | 版本是101 | memtable version is 101 | remove | |||
Metadata Metadatat Marker | 1 | 02 | 开始进入元数据区the following is metadata | ||||
ChunkMetadata(N个) | 4 | 0000 0003 | sensor名长度 | 删除remove | |||
4 | 732e 33 | s.1 | 删除remove | ||||
8 | 00 0000 0000 0000 0c | 该chunk的offset在12 | |||||
2 | 0003 | 数据类型为float | data type is float | remove删除 | |||
Chunk Statistics | 8 | 0000 0000 0000 0001 | chunk中有1个点 | long 改成 -> varInt | |||
8 | 0000 0000 0000 0001 | start_time | |||||
8 | 0000 0000 0000 0001 | end_time | |||||
4 | 4000 0000 | min_value | |||||
4 | 4000 0000 | max_value | |||||
4 | 4000 0000 | first_value | |||||
4 | 4000 0000 | last_value | |||||
8 | 4000 0000 0000 0000 | sum | |||||
TimeSeries Metadata(N个) | 1 | 新增 timeseries metadata type,若为00则表示不包含statistics | |||||
4 | 00 0000 03 | sensor名长度 | int 改成 varInt | ||||
3 | 73 2e33 | s.1 | |||||
2 | 0003 | 数据类型为float | short -> byte | ||||
8 | 0000 0000 0000 00a0 | ChunkMetadataList的offset | |||||
4 | 0000 0041 | ChunkMetadataList的size | int 改成 varInt | ||||
TimeSeries Statistics | 8 | 0000 0000 0000 0001 | 该序列在file中有1个点 | long 改成 varInt | |||
8 | 0000 0000 0000 0001 | start_time | |||||
8 | 0000 0000 0000 0001 | end_time | |||||
4 | 4000 0000 | min_value | |||||
4 | 4000 0000 | max_value | |||||
4 | 4000 0000 | first_value | |||||
4 | 4000 0000 | last_value | |||||
8 | 4000 0000 0000 0000 | sum | |||||
MetaDataIndex Node | 4 | 0000 0001 | 树的第二层,他有多少个孩子 | int 改成 -> varInt | |||
MetaDataIndex Entry(N个) | 4 | 0000 0003 | sensor名长度为3 | int 改成 -> varInt | |||
3 | 732e 33 | s.3 | |||||
8 | 00 0000 0000 0000 e1 | offset of the child | |||||
8 | 00 0000 0000 0001 26 | endOffset of the last child | |||||
1 | 03 | Node type是Leaf_Measurement | |||||
MetaDataIndex Node | 4 | 0000 0001 | 树的第一层,他有多少个孩子 | int 改成 -> varInt | |||
MetaDataIndex Entry(N个) | 4 | 0000 0010设备名长度为16 | size of deviceid is 16bytes | int 改成 -> varInt | |||
16 | 726f 6f74 2e74 7572 6269 6e65 312e 6431 | 设备名name of deviceId | |||||
8 | 0000 0000 0000 0126 | offset of the child | |||||
8 | 0000 0000 0000 0142 | endOffset of the last child | |||||
1 | 02 | Node type是Internal_Measurement | Node type改成LEAF_DEVICE | ||||
total chunk number | 4 | 0000 0001 | total chunk number | 删除remove | |||
invalid chunk number | 4 | 0000 0000 | 无效的chunk number | 删除remove | |||
Version Info | 4 | 00 0000 01 | version pair的个数 | int 改成 varIntremove | |||
Version Pair(N个) | 8 | 00 0000 0000 0000 9f | offset of current version | remove | |||
8 | 00 0000 0000 0000 65 | 版本是101 | remove | ||||
Bloom Filter | 4 | 0000 001f | bloom filter size | int 改成 varInt | |||
31 | 00 0000 0040 0000 0000 0000 0000 0100 0000 2000 0000 0020 0000 0000 0000 0004 | bloom filter data | |||||
4 | 0000 0100 | filter size | int 改成 varInt | ||||
4 | 0000 0005 | hash function size | int 改成 varInt | ||||
Footer | 4 | 0000 0078 | tsfile metadata size | 不能使用varInt,因为这个需要倒着读 | |||
MAGIC_STRING | 6 | 5473 4669 6c65 | TsFile |
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