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Tencent Cloud Developer
Tencent Cloud Developer
Jul 16, 2019 · Big Data

Design and Challenges of Tencent iData Analysis Center Backend: Bitmap Storage and MapReduce Architecture

Tencent’s iData Analysis Center rebuilt its backend as TGMars, replacing a rigid row‑oriented bitmap store and single‑node MapReduce pipeline with a more extensible architecture that shards user behavior bitmaps, eliminates shuffle overhead, and adds columnar storage, iterative processing and SQL‑like capabilities using Spark to overcome scalability and flexibility limitations.

Big DataMapReduceOLAP
0 likes · 10 min read
Design and Challenges of Tencent iData Analysis Center Backend: Bitmap Storage and MapReduce Architecture
58 Tech
58 Tech
Feb 15, 2019 · Artificial Intelligence

Precise Push Notification Architecture and Algorithm Optimization at 58.com

This article describes the evolution of 58.com's user‑set service architecture, the transition from MongoDB to RoaringBitmap storage, and the machine‑learning‑driven algorithm optimizations that enable real‑time, multi‑dimensional, and localized push notifications for millions of users.

algorithm optimizationbitmap storagemachine learning
0 likes · 13 min read
Precise Push Notification Architecture and Algorithm Optimization at 58.com