Is there any row key partition limit in KairosDB

Question

KairosDB建在cassandra之上，但cassandra有行密钥分区限制，那分区限制是否也适用于此？

Answer 1

Yes, it has the same limitation -- in the Getting Started section you can read what follows:

Using with Cassandra [...]

The default configuration for Cassandra is to use wide rows. Each row is set to contain 3 weeks of data. The reason behind setting it to 3 weeks is if you wrote a metric every millisecond for 3 weeks it would be just over 1 billion columns. Cassandra has a 2 billion column limit.

HTH, Carlo

Answer 2

we already discussedvia the kairosDB discussion group, but you raise an interesting question here.

I am sure that if you come over 2^64 you will have much more problems than the index capability of Cassandra. Imagine you're only using 1 byte per series, that means 1.84e19 bytes... Only Google or facebook know yet how to store 18 exabytes, which is a cosmic size.