[Solved] MongoDB crashed due to disk full – WiredTigerLAS.wt

Problem Statement One of the secondary MongoDB servers stopped working. When checked, the disk usage of the server was 100% and it was due to the sudden growth of WiredTigerLAS.wt. Sample error Reason of the Mongo process crash Mongod will crash if the size exceeds ‘wiredTigerMaxCacheOverflowFileSizeGB‘. https://docs.mongodb.com/manual/reference/program/mongod/#cmdoption-mongod-wiredtigermaxcacheoverflowfilesizegb What is WiredTigerLAS.wt WiredTigerLAS table is a temporary…

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Notes for setting up MongoDB 4.x Cluster – High-Availability with example configuration

TLDR; Instruction to setup MongoDB 4.x cluster in Ubuntu 16.04 which is highly available. Architecture Step 1: Prerequisites 3 servers – say config-01, config-02 & config-03 2 servers – say mongos-01 & mongos-02 3 servers – say shard1-01, shard1-02 & shard1-03 OS: Ubuntu 16.04 CPU: minimum of 1 CPU server Memory: No restriction Network: All…