cassandra - KairosDB: is it a good idea to create many metrics?

Question

I plan to use KairosDB to store monitoring data for my VMs' disk IO. Now I am thinking that I should create a metric for every VM, which will lead to many metrics in the DB, or just create a metric for all VMs and use tags to identify data for each VM.

I am not sure if a large number of metrics will kill the performance or hurt query.

Any suggestions?

Answer 1

与谢尔盖相同的评论。要回答您的其他问题，有许多指标不会影响性能。

但是必须避免使用具有非常高标签基数的指标，但在您的情况下，您不应该这样做（高基数是指非离散值或数千个值）。