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by outsb 1545 days ago
Given Victoria Metrics is the only solution I've seen to make data comparing it to other systems easily accessible as part of official documentation, it's the only one I pay attention to.

I knew from reading the docs what VM excelled at and areas it was weak in, long before I ever ran it (and expectations from running it matched the documentation). I hate aspirational marketing-saturated campaigns for deep tech projects where standards should obviously be higher, it speaks more about intended audience than it does the solution, and that's why in this respect VM is automatically a cut above the rest.
1 comments
cip01 1545 days ago
Cortex, Thanos and Mimir all support "remote-read" protocol (documented in Prometheus: https://prometheus.io/docs/prometheus/latest/storage/#remote...), so external systems (eg Prometheus) can read data from them easily.
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valyala 1545 days ago
It would be great if you could provide a few practical examples for "Prometheus remote-read" protocol given its' restrictions [1].

[1] https://github.com/prometheus/prometheus/issues/4456

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cip01 1545 days ago
Which restrictions do you have in mind?

Quick look at the issue looks like it wanted to avoid using local storage by Prometheus, but that’s Prometheus specific problem, not remote-read problem.

Remote-read is a generic protocol (https://github.com/prometheus/prometheus/blob/a1121efc18ba15...), you pass query (start/end time and matchers), and get back data.

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valyala 1543 days ago
> Which restrictions do you have in mind?

You wrote in the previous comment:

> ... so external systems (eg Prometheus) can read data from them easily.

I pointed to an issue, which prevents from practical usage of remote read protocol from Prometheus itself.

As for the interoperability with external systems, Prometheus querying API [1] is better suited for this task than Prometheus remote read protocol because of the following reasons:

- Prometheus querying API is easy to use, since it is just JSON over HTTP (unlike compressed protobuf used for Prometheus remote read). E.g. humans can test and debug it either directly in web-browser or in a command-line shell with curl.

- Prometheus querying API is already supported by popular external systems such as Grafana.

- Many Prometheus-compatible systems such as Thanos, Cortex, M3, VictoriaMetrics, etc. support Prometheus querying API out of the box.

[1] https://prometheus.io/docs/prometheus/latest/querying/api/

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