OTP 21.2

Erlang/OTP 21.2 is the second service release for the 21st major release with, improvements as well as a few features!

Highlights

SSH:

• Public key methods: ssh-ed25519 and ssh-ed448 added. Requires OpenSSL 1.1.1 or later as cryptolib under the OTP application

SSL:

• ssl now uses active n internally to boost performance. Old active once behaviour can be restored by setting a application variable.

ERTS, Kernel:

• New counters and atomics modules supplies access to highly efficient operations on mutable fixed word sized variables.
• New module persistent_term!. Lookups are in constant time! No copying the terms!
• New pollset made to handle sockets that use {active, true} or {active, N}. Polled by a normal scheduler!
• No more ONESHOT mechanism overhead on fds! Only on Linux and BSD

For a full list of details see: http://erlang.org/download/otp_src_21.2.readme

Pre built versions for Windows can be fetched here: http://erlang.org/download/otp_win32_21.2.exe http://erlang.org/download/otp_win64_21.2.exe

Online documentation can be browsed here: http://erlang.org/documentation/doc-10.2/doc

The Erlang/OTP source can also be found at GitHub on the official Erlang repository, Here: OTP-21.2

Please report any new issues via Erlang/OTPs public issue tracker https://bugs.erlang.org We want to thank all of those who sent us patches, suggestions and bugreports! Thank you! The Erlang/OTP Team at Ericsson