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The following commit(s) were added to refs/heads/main by this push:
new d0f4e69c update timeseries metadata (#325)
d0f4e69c is described below
commit d0f4e69c2595b16200a67b02252828c10aec5679
Author: RX Xiao <[email protected]>
AuthorDate: Sat Sep 27 11:42:00 2025 +0800
update timeseries metadata (#325)
---
community/data-structure-on-rocksdb.md | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/community/data-structure-on-rocksdb.md
b/community/data-structure-on-rocksdb.md
index 2f195a04..598c079f 100644
--- a/community/data-structure-on-rocksdb.md
+++ b/community/data-structure-on-rocksdb.md
@@ -48,6 +48,7 @@ The values encoded for other data types in flags can be found
in the table below
| JSON | 10 |
| Hyperloglog| 11 |
| TDigest | 12 |
+| TimeSeries | 13 |
In the encoding version `0`, `expire` is stored in seconds and as a 4byte
field (32bit integer), `size` is stored as also a 4byte field (32bit integer);
while in the encoding version `1`, `expire` is stored in milliseconds and as a
8byte field (64bit integer), `size` is stored as also a 8byte field (64bit
integer).
@@ -463,16 +464,17 @@ RedisTimeSeries is a Redis module that enables a
full-featured time-series datab
The metadata stores the overall configuration for a single time series, such
as retention, duplicate policy and chunk settings.
```text
-
+----------+----------+-----------+------------------+----------------+-----------+-----------+----------------+----------------+-----------+
-key => | flags | expire | version | size(chunkCount) | retentionTime
| chunkSize | chunkType | duplicatePolicy| sourceKey_size | sourceKey |
- | (1byte) | (Ebyte) | (8byte) | (Sbyte) | (8byte)
| (8byte) | (1byte) | (1byte) | (4byte) | (Xbyte) |
-
+----------+----------+-----------+------------------+----------------+-----------+-----------+----------------+----------------+-----------+
+
+----------+----------+-----------+------------------+----------------+-----------+-----------+----------------+----------------+-----------+----------------+
+key => | flags | expire | version | size(chunkCount) | retentionTime
| chunkSize | chunkType | duplicatePolicy| sourceKey_size | sourceKey |
lastTimestamp |
+ | (1byte) | (Ebyte) | (8byte) | (Sbyte) | (8byte)
| (8byte) | (1byte) | (1byte) | (4byte) | (Xbyte) |
(8byte) |
+
+----------+----------+-----------+------------------+----------------+-----------+-----------+----------------+----------------+-----------+----------------+
```
- `retentionTime`: Maximum age (in milliseconds) for samples compared to the
latest timestamp. A value of `0` disables retention.
- `chunkSize`: The preferred number of samples per data chunk.
- `chunkType`: The storage format of the chunk (compressed or uncompressed).
- `duplicatePolicy`: An enum represents the policy to handle samples with
duplicate timestamps (e.g., BLOCK, FIRST, LAST).
- `sourceKey`: If this series is a downstream target for compaction, this
field stores the key of the source series.
+- `lastTimestamp`: An approximate latest timestamp in the time series.
#### TimeSeries sub keys-values
