Database Reference
In-Depth Information
architecture of Open TSDB is shown in
Figure 4-1
. This figure is taken with minor modifica-
tions from the Open TSDB documentation.
Figure 4-1. Open TSDB consists of a number of cooperating components to load and access data
from the storage tier of a time series database. These include data collectors, time-series daemons
(TSD), and various user interface functions. Open TSDB components are colored gray.
On servers where measurements are made, there is a collector process that sends data to the
time series daemon (TSD) using the TSD RPC protocol. The time series daemons are re-
sponsible for looking up the time series to which the data is being appended and inserting
each data point as it is received into the storage tier. A secondary thread in the TSD later re-
places old rows with blob-formatted versions in a process known as row compaction. Be-
cause the TSD stores data into the storage tier immediately and doesn't keep any important
