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Jun 25, 2024 · Databases

How Didi Scales Elasticsearch: Architecture, Performance Tuning, and Cost Optimization

This article details Didi’s use of Elasticsearch 7.6, covering its architecture on physical machines, gateway and control layers, user console features, deployment models, data synchronization strategies, engine iterations such as fine‑grained tiered protection, multi‑active replication, JDK 17/ZGC performance upgrades, cost reductions, multi‑tenant isolation, security enhancements, and future migration to ES 8.13.

DataSyncElasticsearchMultitenant
0 likes · 17 min read
How Didi Scales Elasticsearch: Architecture, Performance Tuning, and Cost Optimization
dbaplus Community
dbaplus Community
Sep 26, 2019 · Databases

Mastering Oracle 12c Multitenant Backup & Recovery: A Step‑by‑Step Guide

An in‑depth exploration of Oracle 12c’s multitenant architecture explains key concepts, analyzes a real‑world backup failure, and provides a comprehensive, step‑by‑step RMAN procedure—including control file handling, datafile restoration, and selective tablespace skipping—to reliably recover pluggable databases.

BackupMultitenantOracle
0 likes · 13 min read
Mastering Oracle 12c Multitenant Backup & Recovery: A Step‑by‑Step Guide
dbaplus Community
dbaplus Community
Apr 14, 2019 · Databases

Why Upgrading to Oracle 12cR2 Is Critical: Features, Bugs, and Best Practices

This article explains why enterprises should upgrade to Oracle 12cR2, outlines its key new features such as Multitenant, In‑Memory and Sharding, compares patch counts with earlier releases, details common bugs and work‑arounds, and provides recommended parameters and upgrade references for a smooth migration.

12cR2Bug FixesDatabase Upgrade
0 likes · 16 min read
Why Upgrading to Oracle 12cR2 Is Critical: Features, Bugs, and Best Practices
dbaplus Community
dbaplus Community
Mar 15, 2016 · Databases

Unlocking Oracle 12c: Multitenant, In-Memory, and Security Features Explained

This article examines Oracle Database 12c’s key innovations—including multitenant architecture, the Database In‑Memory option, enhanced security controls, and integrated big‑data analytics—while sharing real‑world production experiences, benefits, and practical limitations for enterprises adopting cloud‑ready databases.

Database 12cIn-MemoryMultitenant
0 likes · 12 min read
Unlocking Oracle 12c: Multitenant, In-Memory, and Security Features Explained