hptd-framework
HPTD(High Performance Timestamp-based Data) is a framework only process the time-based column datas.
The leveldb is a good framework to process the big data with great performance,so the HPTD's foundation is leveldb.
Here, we deal with the high level interface such as REST/socket APIs,meta data management,basic web-ui management.
Chunk Data format
| Name | Byte Length | Description |
|---|---|---|
| typeSize | 2 | the type list size |
| typeList | var length | the columns type list,a type is a 4 bits value |
| dataList | var length | the data list |
Data Type Table
| Name | Value | Abbr Char | Byte Length |
|---|---|---|---|
| null | 0 | n | 0 |
| byte | 1 | b | 1 |
| short | 2 | s | 2 |
| int | 3 | i | 4 |
| long | 4 | l | 8 |
| float | 5 | f | 4 |
| double | d | n | 8 |
| char | 7 | c | 2 |
| string | 8 | t | var |
| byte array | 9 | y | var |