A database is core to your infrastructure...finding out your database is going away is a horrifying situation. Finding out that the time you have to migrate is a few months. Agh.
As others will say, there are options. Rockset helpfully posts links to a bunch of comparisons on their website, and these alternatives include ClickHouse, Elasticsearch, Druid, etc.. https://rockset.com/real-time-analytics-comparison/
I'm inherently biased (as a member of the ClickHouse team). But do check ClickHouse out.
You can always come hang out in our Slack (clickhouse.com/slack) and, of course, the combination of hosted ClickHouse (clickhouse.com/cloud) and the open-source (github.com/clickhouse) may add a bit of comfort when your vendor up and disappears via acquisition.
To anyone else who may be confused like I was: Rockset will, in fact, "gradually transition current customers off Rockset". The OpenAI announcement linked above doesn't say so, but the Rockset announcement does:
Month-to-month users been given until September 30, which is a very short amount of time for a major infrastructure transition. Enterprise users are given a vague "talk to your account manager" answer:
But yes, ZooKeeper is pretty amazing. We are building on the backs of giants.
I'd also argue the RAFT v. ZAB is an important production scale conversation. But, as the blog says, Zookeper is a better option when you require scalability with a read-heavy workload.
(disclaimer: I work at ClickHouse and am super excited the PeerDB team is joining us)