Which type of bucket is currently open for writes and readable?

The hot bucket is the type that is open for write operations and is also readable. In Splunk's bucket lifecycle, hot buckets are ones that actively receive incoming data. This is where the most recent data resides and is optimized for fast ingestion and immediate searchability. As data is written into Splunk, it is initially stored in a hot bucket, which allows for immediate access and querying.

As time progresses and as data ages, the hot bucket eventually transitions into a warm bucket, which still allows for reads but is no longer open for writes. After warm, the buckets may progress to cold and then to frozen, with each stage being less available for immediate writes and searches, ultimately leading to the potential deletion of data in frozen buckets. Understanding this lifecycle is crucial for effectively managing data in Splunk.