taosdata/TDengine

Is it possible to set the rocksdb options `max_log_file_size/keep_log_file_num`

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#32,930 opened on Sep 9, 2025

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help wantedquestion

Description

I don't need the LOG files which are created here e.g. /var/lib/taos/vnode/vnode4/tq/stream/0x5940669214c1bdd8-0x1d3c08c2/state/LOG as they are getting really large > 1 GB.

I think with the two options max_log_file_size/keep_log_file_num of rocksdb i could limit the size. Is there a way to set both these options?

Contributor guide

Tech stack
c
Domain
databasebackend
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Basic knowledge of RocksDB
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
The issue requests the ability to configure RocksDB options max log file size and keep log file num. The current codebase likely initializes RocksDB with default options. To implement this, one needs to examine the RocksDB initialization code in the TDengine source, likely in files under `src/` or `plugins/` directories. Look for where `rocksdb::Options` or similar structures are set. There may be an existing configuration mechanism that can be extended. If not, a new configuration parameter or environment variable can be added. Additionally, review the RocksDB documentation for these options to understand how to pass them to `DB::Open`.