Yue Lu from Twitter, and collaborator Juncheng Yang and Rashmi from CMU. Pelikan (starting 2020), mostly written by Brian Martin(I really like his obsession to rust) is the current production in-memory cache for small data in twitter which is inspired by the traces captured with eBPF last year can do a smaller granularity analysis of memory cache.
Twitter seems not to accept my newly composed wordpress behind nginx with error code ERROR: Failed to fetch page due to: ChannelClosed
Using tcpdump -i eth1 -X -e -w test.cap on my psychz VPS. it gets
Sounds the handshakes return with different SSL version. ssl_ciphers 'ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:!3DES'; from https://wordpress.org/support/topic/twitter-card-images-not-showing/ did not work. So, eventually, I found I didn't switch on the Cloudflare full encryption. Everything is good.