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Performance and maintainablity of a large MySQL table with hundreds of columns

For a project of mine I need to have a table with around 400 hundred columns of type nullable indexed VARCHAR(128), this table is going to store at least 50 million rows and has one column of type ...
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Choosing In-memory data grid / KV store for C++ project, targeting high throughput and elastic failover [closed]

(question moved from SO) I'm looking for IMDG/KV solution matching following criteria: must be distributed/HA: masterless/multi-write-master wanted has C/C++ API max. 200 microseconds latency ...
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MySQL: Optimizing for large but discrete data sets

In brief: I'm developing a database that handles GTFS datasets from multiple transit agencies. Each dataset contains millions of rows in the stop_times.txt file (and thus its corresponding table). ...
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MySql Scalability, Master Slave replication a good idea? Read description please

I have a database on mysql which is scaling on daily basis and right now its on 5M records and in a month it may double itself. I have a table containing users data which is the largest one. I have ...
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Are database servers less scalable than web servers? [closed]

Isn't it possible to scale database servers through virtualization, like forever? I like to keep most of the workload on database server because it optimizes queries and the architecture decreases the ...