KairosDB has a limit on the number of lines per line
2 answers
Yes, it has the same limitation - in the Getting Started section , you can read the following:
Usage with Cassandra [...]
The default configuration for Cassandra is using large strings. Each row will contain 3 weeks of data. The reason is to set it to 3 weeks, if you wrote a metric every milliseconds for 3 weeks, it will be just over 1 billion columns. Cassandra has a 2 billion column limit.
NTN, Carlo
+2
source to share
we have already discussed the kairosDB discussion group, but you are asking an interesting question here.
I'm sure if you go 2 ^ 64 you will have a lot more problems than the Cassandra index. Imagine you only use 1 byte for each batch, which means 1.84e19 bytes ... Only Google or Facebook knows how to store 18 exabytes, which is a cosmic size.
+1
source to share