vmctl: fix vmctl blocking on process interrupt
This change prevents vmctl from indefinite blocking on
receiving the interrupt signal. The update touches all
import modes and suppose to improve tool reliability.
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2491
* Simplify queries to OpenTSDB (and make them properly appear in OpenTSDB query stats) and also tweak defaults a bit
* Convert seconds to milliseconds before writing to VictoriaMetrics and increase subquery size
Signed-off-by: John Seekins <jseekins@datto.com>
On import process interruption `vmctl` now prints the max and min timestamps of:
* last failed batch if import ended with error;
* last sent batch if import was cancelled by user.
To get more details for each timeseries in batch user needs to specify `--verbose` flag.
The change does not relate to `vm-native` mode, since `vmctl` has no control over
transferred data in this mode.
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1236
Signed-off-by: hagen1778 <roman@victoriametrics.com>
* add more documentation on OpenTSDB migration explaining what chunking means
* more clarification of OpenTSDB aggregations
* break out what a retention string becomes
* add more docs around retention strings
* add example of running program and fix mistake in how hard offsets are handled
* fix formatting
