# Time partition
# Features
Time partition divides data according to time, and a time partition is used to save all data within a certain time range. The time partition number is represented by a natural number. Number 0 means January 1, 1970, it will increase by one every partition_interval milliseconds. Time partition number's calculation formula is timestamp / partition_interval. The main configuration items are as follows:
- time_partition_interval
Name | time_partition_interval |
---|---|
Description | Time range for dividing database, time series data will be divided into groups by this time range |
Type | Int64 |
Default | 604800000 |
Effective | Only allowed to be modified in first start up |
# Configuration example
Enable time partition and set partition_interval to 86400000 (one day), then the data distribution is shown as the following figure:

Insert one datapoint with timestamp 0, calculate 0/86400000 = 0, then this datapoint will be stored in TsFile under folder 0
Insert one datapoint with timestamp 1609459200010, calculate 1609459200010/86400000 = 18628, then this datapoint will be stored in TsFile under folder 18628
# Suggestions
When enabling time partition, it is better to enable timed flush memtable, configuration params are detailed in Config manual for timed flush.
enable_timed_flush_unseq_memtable: Whether to enable timed flush unsequence memtable, enabled by default.
enable_timed_flush_seq_memtable: Whether to enable timed flush sequence memtable, disabled by default. It should be enabled when time partition is enabled, so inactive time partition's memtable can be flushed regularly.
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