Ben

Total activity 25
Last activity November 18, 2025 22:39
Member since June 08, 2020 16:02

Following 0 users
Followed by 0 users
Votes 0
Subscriptions 21

Articles

Recent activity by Ben

Historical process fails to come up and reports "Packet len is out of range!"
1. Hybrid / Enterprise
2. Data Ingestion
ISSUE Historical server fails to come up and the following error is observed in the log file: 2019-12-16T10:11:06,965 WARN [main-SendThread(10.13.44.53:2181)] org.apache.zookeeper.ClientCnxn - Sess...
- Created April 09, 2025 21:38
- 0 followers
- 0 comments
- 0 votes
Migrating metadata from Postgres to MySQL
1. Hybrid / Enterprise
2. Installation and Operations
OBJECTIVE: To migrate the metadata database from Postgres to MySQL. ADDITIONAL INFORMATION: This article is specifically about migrating metadata from Postgres to MySQL. Overall steps for mi...
- Edited August 19, 2024 16:29
- 1 follower
- 0 comments
- 1 vote
Getting exact count(distinct) results, using druid SQL
1. Hybrid / Enterprise
2. Querying and Data Analysis
OBJECTIVE: To get exact count(distinct) results using druid SQL. ADDITIONAL INFORMATION: It's very difficult to get exact count(distinct) results in distributed databases, including druid (and us...
- Edited February 01, 2021 20:02
- 2 followers
- 0 comments
- 0 votes
Using single-dimension partitioning to improve read performance
1. Hybrid / Enterprise
2. Data Ingestion
OBJECTIVE: Use single-dimension partition to improve query performance for certain queries. (Queries which filter on that dimension.) ADDITIONAL INFORMATION: In some cases, it can be helpful to ha...
- Edited October 26, 2020 22:34
- 1 follower
- 0 comments
- 0 votes