deckhouse/prompp v0.8.1

on GitHub

Features

1. Block-manager historical storage (feature-flagged). Introduced a standalone block.Manager/block.Compactor that owns reading persisted blocks, applying retention, and compaction, replacing the embedded TSDB on the read path in server mode. The pre-existing historical TSDB path stays the default; enable the new engine via PROMPP_FEATURES=enable_block_manager. Adds compaction plan/result logging, restored block-manager gauges, and block-duration diagnostics metrics (prometheus_tsdb_blocks_loaded_by_duration).
2. Disable core dumps feature flag. Added PROMPP_FEATURES=disable_coredumps, which sets RLIMIT_CORE to 0 at startup so the kernel does not write core dumps into the working directory on crash. Lowering the limit needs no extra privileges, so it works in unprivileged Kubernetes pods.

Enhancements

1. DataStorage metrics. Exposed a new family of prompp_data_storage_* metrics — per-encoder-type counts, finalized chunk counts, and timestamp state counts — giving operators visibility into the C++ data storage internals.

Performance

1. Faster NewLabelsWithLSS. Added a dedicated serialize_from_snapshot_to_buffer binding so building Go label sets from an LSS snapshot serializes directly into a buffer, cutting allocations and copies on the hot path.
2. Index writer optimization. Reworked snapshot symbol collection to emit each label name once instead of once per value (a single hot name previously reached ~4.7k copies on a real LSS), cutting write_symbols time after shrink by a further ~16% on top of the btree change.

Fixes

1. Dependency security updates. Bumped the Go go.mongodb.org/mongo-driver to v1.17.7 and the web UI ws (v8.21.0) and form-data (v3.0.5) packages, picking up upstream security fixes.

Other

1. GCC 16 C++ toolchain. Upgraded the CI/devcontainer C++ toolchain to GCC 16.