* [ANN] unicorn 5.5.2 - Rack HTTP server for fast clients and *nix
@ 2019-12-20 2:15 5% Eric Wong
0 siblings, 0 replies; 3+ results
From: Eric Wong @ 2019-12-20 2:15 UTC (permalink / raw)
To: ruby-talk, unicorn-public; +Cc: Terry Scheingeld
unicorn is an HTTP server for Rack applications designed to only serve
fast clients on low-latency, high-bandwidth connections and take
advantage of features in Unix/Unix-like kernels. Slow clients should
only be served by placing a reverse proxy capable of fully buffering
both the the request and response in between unicorn and slow clients.
Disclaimer:
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.
Consider this just an announcement to inform existing users of a
new version, not something to convince you to switch to something
that set the entire Ruby back decades in terms of concurrency.
* https://bogomips.org/unicorn/
* public list: unicorn-public@bogomips.org
* mail archives: https://bogomips.org/unicorn-public/
* git clone https://bogomips.org/unicorn.git
* https://bogomips.org/unicorn/NEWS.atom.xml
* nntp://news.public-inbox.org/inbox.comp.lang.ruby.unicorn
Changes:
Thanks to Terry Scheingeld, we now workaround a Ruby bug
and can now run with taint checks enabled:
<https://bugs.ruby-lang.org/issues/14485>
<https://bogomips.org/unicorn-public/CABg1sXrvGv9G6CDQxePDUqTe6N-5UpLXm7eG3YQO=dda-Cgg7A@mail.gmail.com/>
There's also a few documentation updates and building packages
from source is easier since pandoc is no longer a dependency
(and I can no longer afford the bandwidth or space to install
it).
Eric Wong (7):
test/benchmark/ddstream: demo for slowly reading clients
test/benchmark/readinput: demo for slowly uploading clients
test/benchmark/uconnect: test for accept loop speed
examples/unicorn@.service: note the NonBlocking flag
Merge remote-tracking branch 'origin/ts/tmpio'
test_util: get rid of some unused variables in tests
doc: replace pandoc-"Markdown" with real manpages
Terry Scheingeld (1):
tmpio: workaround File#path being tainted on unlink
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^ permalink raw reply [relevance 5%]
* [PATCH 0/3] slow clients and test/benchmark tools
@ 2019-05-12 22:25 7% Eric Wong
2019-05-12 22:25 5% ` [PATCH 1/3] test/benchmark/ddstream: demo for slowly reading clients Eric Wong
0 siblings, 1 reply; 3+ results
From: Eric Wong @ 2019-05-12 22:25 UTC (permalink / raw)
To: unicorn-public
Slowloris made waves nearly a decade ago, and there are still
people being misled into using the wrong reverse proxy for
unicorn. Maybe these new standalone Rack apps can convince
folks to deploy unicorn correctly behind nginx, or better,
evaluate alternatives to nginx :>
Thus ddstream and readinput can help users evaluate
fully-buffering reverse proxies such as nginx, or similar :>
Finally, uconnect is intended to evaluate removal of the kgio
dependency (and maybe future speedups)
test/benchmark/ddstream: demo for slowly reading clients
test/benchmark/readinput: demo for slowly uploading clients
test/benchmark/uconnect: test for accept loop speed
test/benchmark/README | 18 +++++++---
test/benchmark/ddstream.ru | 50 +++++++++++++++++++++++++++
test/benchmark/readinput.ru | 40 ++++++++++++++++++++++
test/benchmark/uconnect.perl | 66 ++++++++++++++++++++++++++++++++++++
4 files changed, 170 insertions(+), 4 deletions(-)
create mode 100644 test/benchmark/ddstream.ru
create mode 100644 test/benchmark/readinput.ru
create mode 100755 test/benchmark/uconnect.perl
Creuncf lrg-nabgure-ubeevoyl-anzrq-freire pna shapgvba nf na
atvak ercynprzrag...
^ permalink raw reply [relevance 7%]
* [PATCH 1/3] test/benchmark/ddstream: demo for slowly reading clients
2019-05-12 22:25 7% [PATCH 0/3] slow clients and test/benchmark tools Eric Wong
@ 2019-05-12 22:25 5% ` Eric Wong
0 siblings, 0 replies; 3+ results
From: Eric Wong @ 2019-05-12 22:25 UTC (permalink / raw)
To: unicorn-public
This is intended to demonstrate how badly we suck at dealing
with slow clients. It can help users evaluate alternative
fully-buffering reverse proxies, because nginx should not
be the only option.
Update the benchmark README while we're at it
---
test/benchmark/README | 13 +++++++---
test/benchmark/ddstream.ru | 50 ++++++++++++++++++++++++++++++++++++++
2 files changed, 59 insertions(+), 4 deletions(-)
create mode 100644 test/benchmark/ddstream.ru
diff --git a/test/benchmark/README b/test/benchmark/README
index 1d3cdd0..e9b7a41 100644
--- a/test/benchmark/README
+++ b/test/benchmark/README
@@ -42,9 +42,14 @@ The benchmark client is usually httperf.
Another gentle reminder: performance with slow networks/clients
is NOT our problem. That is the job of nginx (or similar).
+== ddstream.ru
+
+Standalone Rack app intended to show how BAD we are at slow clients.
+See usage in comments.
+
== Contributors
-This directory is maintained independently in the "benchmark" branch
-based against v0.1.0. Only changes to this directory (test/benchmarks)
-are committed to this branch although the master branch may merge this
-branch occassionaly.
+This directory is intended to remain stable. Do not make changes
+to benchmarking code which can change performance and invalidate
+results across revisions. Instead, write new benchmarks and update
+coments/documentation as necessary.
diff --git a/test/benchmark/ddstream.ru b/test/benchmark/ddstream.ru
new file mode 100644
index 0000000..b14c973
--- /dev/null
+++ b/test/benchmark/ddstream.ru
@@ -0,0 +1,50 @@
+# This app is intended to test large HTTP responses with or without
+# a fully-buffering reverse proxy such as nginx. Without a fully-buffering
+# reverse proxy, unicorn will be unresponsive when client count exceeds
+# worker_processes.
+#
+# To demonstrate how bad unicorn is at slowly reading clients:
+#
+# # in one terminal, start unicorn with one worker:
+# unicorn -E none -l 127.0.0.1:8080 test/benchmark/ddstream.ru
+#
+# # in a different terminal, start more slow curl processes than
+# # unicorn workers and watch time outputs
+# curl --limit-rate 8K --trace-time -vsN http://127.0.0.1:8080/ >/dev/null &
+# curl --limit-rate 8K --trace-time -vsN http://127.0.0.1:8080/ >/dev/null &
+# wait
+#
+# The last client won't see a response until the first one is done reading
+#
+# nginx note: do not change the default "proxy_buffering" behavior.
+# Setting "proxy_buffering off" prevents nginx from protecting unicorn.
+
+# totally standalone rack app to stream a giant response
+class BigResponse
+ def initialize(bs, count)
+ @buf = "#{bs.to_s(16)}\r\n#{' ' * bs}\r\n"
+ @count = count
+ @res = [ 200,
+ { 'Transfer-Encoding' => -'chunked', 'Content-Type' => 'text/plain' },
+ self
+ ]
+ end
+
+ # rack response body iterator
+ def each
+ (1..@count).each { yield @buf }
+ yield -"0\r\n\r\n"
+ end
+
+ # rack app entry endpoint
+ def call(_env)
+ @res
+ end
+end
+
+# default to a giant (128M) response because kernel socket buffers
+# can be ridiculously large on some systems
+bs = ENV['bs'] ? ENV['bs'].to_i : 65536
+count = ENV['count'] ? ENV['count'].to_i : 2048
+warn "serving response with bs=#{bs} count=#{count} (#{bs*count} bytes)"
+run BigResponse.new(bs, count)
--
EW
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