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360 Tech Engineering

Official tech channel of 360, building the most professional technology aggregation platform for the brand.

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Latest from 360 Tech Engineering

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360 Tech Engineering
360 Tech Engineering
May 7, 2021 · Databases

MongoDB Sharding Key Query Failure and Unique Index Violation Explained

This article reproduces a MongoDB issue where queries using a hashed sharding key return no results and a unique compound index appears to fail, then explains the root cause—index entries exceeding the 1024‑byte limit and the failIndexKeyTooLong parameter—providing step‑by‑step commands, configuration changes, and practical recommendations.

Unique IndexfailIndexKeyTooLongindexing
0 likes · 35 min read
MongoDB Sharding Key Query Failure and Unique Index Violation Explained
360 Tech Engineering
360 Tech Engineering
Apr 16, 2021 · Artificial Intelligence

Applying YOLOv5 Object Detection for Black, Color, and Normal Screen Classification in Video Frames

This article presents a method that replaces traditional manual video frame quality checks with an automated YOLOv5‑based object detection pipeline, detailing data labeling, model training, loss computation, inference code, and experimental results that show higher accuracy than ResNet for classifying black, color‑screen, and normal frames.

Image ClassificationPythonYOLOv5
0 likes · 12 min read
Applying YOLOv5 Object Detection for Black, Color, and Normal Screen Classification in Video Frames
360 Tech Engineering
360 Tech Engineering
Apr 12, 2021 · Operations

Mellanox CX-5 NIC OVS Flow Table Acceleration and SR‑IOV VF Migration Guide

This guide details the investigation of Mellanox CX‑5 NIC support for OVS flow‑table acceleration, outlines required software versions, explains VT‑d and SR‑IOV technologies, provides step‑by‑step host configuration, OVS setup, test procedures, performance results in VXLAN and VLAN environments, and explores the feasibility and scripts for VF hot‑migration.

LinuxMellanoxOVS
0 likes · 10 min read
Mellanox CX-5 NIC OVS Flow Table Acceleration and SR‑IOV VF Migration Guide
360 Tech Engineering
360 Tech Engineering
Mar 22, 2021 · Databases

Analyzing and Optimizing High Memory and Disk I/O Consumption of InfluxDB 1.8 on a Production Server

This article investigates why an InfluxDB 1.8 instance on a 32‑core, 64 GB server consumes over 58 GB of resident memory and generates heavy disk I/O, examines Go runtime memory accounting, uses system tools such as top, pmap, pprof and iostat for diagnosis, and presents configuration and runtime tweaks that reduce memory pressure and I/O load.

InfluxDBLinuxMemory Leak
0 likes · 13 min read
Analyzing and Optimizing High Memory and Disk I/O Consumption of InfluxDB 1.8 on a Production Server
360 Tech Engineering
360 Tech Engineering
Mar 15, 2021 · Backend Development

Distributed Lock Implementations with Redis, Etcd, and Zookeeper

This article explains the concept, application scenarios, and detailed implementations of distributed locks using Redis, Etcd, and Zookeeper, providing Java code examples, lock mechanisms, lease handling, watch features, and a comparative summary of their advantages and drawbacks.

distributed-lock
0 likes · 14 min read
Distributed Lock Implementations with Redis, Etcd, and Zookeeper
360 Tech Engineering
360 Tech Engineering
Mar 12, 2021 · Databases

Comprehensive Overview of the InnoDB Lock System in MySQL

This article provides a detailed explanation of MySQL InnoDB's lock system, covering lock granularity, shared and exclusive locks, intention and auto‑increment locks, various row‑lock types, deadlock scenarios with examples, and the internal representation of locks in the engine.

DatabaseInnoDBLocks
0 likes · 22 min read
Comprehensive Overview of the InnoDB Lock System in MySQL