Fast TSDB backend for graphite
Project description
Time series database, backend for graphite, fast alternative to carbon + whisper
All metrics are dumped into blocks (lmdb databases). Each block contain all metrics and their data for particular amount of time.
data_dir ├── resolution1 │ ├── block1.hdb # block data │ ├── block2.hdb │ └── blocks.state # notifications ├── resolution2 │ ├── block1.hdb │ ├── block2.hdb │ └── blocks.state └── metric.index # metric name index
--------------------------------------------------------------> time
+------------------------------+------------+----+----+----+
| | | | | |
| block1 | block2 | b3 | b4 | b5 |
| | | | | |
+------------------------------+------------+----+----+----+
|| periodic
\/ merge
+------------------------------+----------------------+----+
| | | |
| block1 | block2' | b5 |
| | | |
+------------------------------+----------------------+----+
| /
| || periodic downsample ---------------
| \/ /
| /--------------------------
+---------+
| |
| block1' |
| |
+---------+
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