Tag: Availability
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Designing Database Systems for Failure
Inspired by Amazon’s recent downtime: As relates to disaster recovery of databases, public cloud customers need three things: Safe Data Guarantees: To have live, fully up to date and fully consistent copies of all your databases in a location of your own choice. That might be your corporate datacenter, a portable USB drive or an…
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How to Improve the Resilience of your MPP Sharding
By now you’ve probably heard of Foursquare’s MongoDB outage, leading to several hours of downtime a couple weeks ago (if not, check the post mortems of Foursquare and MongoDB). The High Scalability blog now takes a look at Sharding in general, explains what it is, defines sharding trouble categories, and finally suggests how to deal…
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SQL Server Redundancy
Andrew Fryer wrote a reference post about SQL Server Redundancy earlier this month about the pros and cons of clustering and mirroring, so it’s about time I mention it here! His motivation was an internal request at Microsoft: If there are internal Microsoft staff who don’t know when to use what, then I imagine there…
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