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Fast Database Restarts at Facebook

Fast Database Restarts at Facebook

陈傲天
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we show that using shared memory provides a simple, effective, fast, solution to upgrading servers. Our key observation is that we can decouple the memory lifetime from the process lifetime. When we shutdown a server for a planned upgrade, we know that the memory state is valid (unlike when a server shuts down unexpectedly). We can therefore use shared memory to preserve memory state from the old server process to the new process. Our solution does not increase the server memory footprint and allows recovery at memory speeds, about 2-3 minutes per server.
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