|author||Eric Wong <email@example.com>||2018-12-16 11:38:59 +0000|
|committer||Eric Wong <firstname.lastname@example.org>||2018-12-19 02:47:00 +0000|
Nowadays, I mainly rely on systemd (and not USR2) for zero-downtime upgrades. Also, CoW-friendliness is standard in mainline Ruby since 2.0. There also needs to be a disclaimer to point out the unfortunate side-effect of robustness for hosting buggy apps.
1 files changed, 9 insertions, 2 deletions
@@ -37,12 +37,15 @@ both the the request and response in between unicorn and slow clients.
You can upgrade unicorn, your entire application, libraries
and even your Ruby interpreter without dropping clients.
+* transparent upgrades using systemd socket activation is
+ supported since unicorn 5.0
* before_fork and after_fork hooks in case your application
has special needs when dealing with forked processes. These
should not be needed when the "preload_app" directive is
false (the default).
-* Can be used with copy-on-write-friendly memory management
+* Can be used with copy-on-write-friendly GC in Ruby 2.0+
to save memory (by setting "preload_app" to true).
* Able to listen on multiple interfaces including UNIX sockets,
@@ -55,7 +58,7 @@ both the the request and response in between unicorn and slow clients.
-unicorn is copyright 2009-2016 by all contributors (see logs in git).
+unicorn is copyright 2009-2018 by all contributors (see logs in git).
It is based on Mongrel 1.1.5.
Mongrel is copyright 2007 Zed A. Shaw and contributors.
@@ -122,6 +125,10 @@ unicorn is designed to only serve fast clients either on the local host
or a fast LAN. See the PHILOSOPHY and DESIGN documents for more details
+Due to its ability to tolerate crashes and isolate clients, unicorn
+is unfortunately known to prolong the existence of bugs in applications
+and libraries which run on top of it.
All feedback (bug reports, user/development dicussion, patches, pull