The Road to Loki 4.0 (Loki Community Call June 2025)

In this Loki Community Call, we welcome back Ed Welch, Principal Engineer on the Loki team. We will be discussing with Ed what is next for Loki as we push forward to Loki 4.0. If you are interested, learn more about potential architecture changes, storage formats, and an open discussion on where Ed and the Loki team would like to see the future of Loki, then make sure you join us live and have your questions answered!

TIMESTAMPS
00:00:00 Introductions to Ed and Charlie
00:06:58 Changes in the way Loki is being used today
00:13:12 Change 1: Columnar storage
00:21:47 Structured metadata in the new columnar storage format
00:24:54 Change 2: Kafka/WarpStream architecture
00:36:43 Q: What happens to unstructured logs in the new storage format?
00:38:22 Change 3: Loki Query Enginey Engine
00:49:20 Q: How do we preserve logs in original format for new storage format?
00:56:34 Q: Backwards compatibility
00:59:49 Q: What about bloom filters?
01:03:09 Q: How can we measure costs of storage/iops for every stream/service name?
01:05:40 30 second summary of this call