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0 pointsjustinsb14y ago0 comments

Deal. My initial sweeping claims were incorrect.

So: How does Google store its sessions?

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2 comments · 1 top-level

haberman14y ago· 1 in thread

So I'm not an expert in Google's front-ends and I'm not sure that Google stores "sessions" in the way you'd generally think of them in web apps. But usually when we have requirements like what you'd need for sessions (highly available, low-latency, highly scalable) we use Megastore:

http://www.cidrdb.org/cidr2011/Papers/CIDR11_Paper32.pdf

http://www.readwriteweb.com/cloud/2011/02/megastore-googles-...

Megastore is a layer on top of Bigtable that adds indexing, synchronous replication across data centers, and ACID semantics within small partitions called "entity groups."

justinsbOP14y ago

Good deal! Agree that traditional sessions are best avoided, but good to know that megastore is suitable for session data.

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