OpenAI Baselines: DQN

We’re open-sourcing OpenAI Baselines, our internal effort to reproduce reinforcement learning algorithms with performance on par with published results. We’ll release the algorithms over upcoming months; today’s release includes DQN and three of its variants. Reinforcement learning results are tricky to reproduce: performance is very noisy, algorithms have many moving

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May 19, 2017: OCSP and Issuance Outage Postmortem

We’ve completed our full postmortem for last Friday’s outage and want to provide some details to our community. From 2017-05-18 17:25 UTC to 2017-05-19 06:05 UTC Let’s Encrypt had a minor OCSP outage, serving HTTP 400’s to a subset of OCSP clients that were making well-formed requests. From 2017-05-19 06:05 UTC to 2017-05-19 22:58 UTC, this became a major outage of both OCSP and the ACME API used for certificate issuance. Approximately 80% of requests failed during this phase. Most users exper…

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