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epriestley 5b1a00eab1 Add various flags to the HgProxy daemons 
Summary:
  - Add flags to exit after an idle time or client count.
  - Add flags to control daemonization.
  - Add flags to control output.
  - Add flags to skip the "hello" frame of the protocol.
  - Make the client launch a server if one does not exist.

The one-time overhead to launch a server and run a command through it looks to be ~130% of the overhead to run the command directly with "hg", so even if we never run a second command we're not paying too much.

The incremental overhead to run subsequent command appears to be less than 3% of the overhead to run the command directly with "hg" (and maybe less than 1%, I'm not sure how long the computation part of a command like 'hg log' "actually" takes).

The overhead to launch a PHP client, connect to an existing server, run a command, and then print it and exit is roughly 50% of the overhead to run the command directly with "hg". So theoretically a user can achieve an amortized 2x performance increase for all 'hg' commands by aliasing 'hg' to the PHP client in their shell.

Test Plan:
  - Ran servers with idle and client count limits, let them idle and/or hit their connection limits, saw them exit.
  - Ran foreground and background servers.
  - Ran a daemon server with redirected stdout/stderr. Verified logs appeared.
  - Ran with --quiet.
  - Ran clients and servers with and without --skip-hello, things work if they agree and break if they disagree. The throughput gain on this is fairly small (maybe 5%?) but it seems simple enough to keep for the moment.
  - Ran serverless clients and verified that servers launched the first time, were available subsequently, and relaunched after 15 seconds idle.

Reviewers: csilvers, vrana, btrahan

Reviewed By: csilvers

CC: aran

Differential Revision: https://secure.phabricator.com/D2680
2012-06-26 11:00:26 -07:00
bin Minor, correct arc handling of relative symlinking (from @makinde). 2012-04-02 16:33:36 -07:00
externals arc lint: fix/enable PEP8 linter 2011-05-18 16:47:23 -07:00
resources Warn about PHP 5.3 only functions and parameters 2012-06-22 15:52:10 -07:00
scripts Add various flags to the HgProxy daemons 2012-06-26 11:00:26 -07:00
src Add various flags to the HgProxy daemons 2012-06-26 11:00:26 -07:00
.arcconfig Automatically detect when to mark revisions committed 2011-09-27 11:06:02 -07:00
.divinerconfig Fix docs links after D2181 and D2182 2012-04-10 11:32:09 -07:00
.gitignore [Arcanist] move scratch directory into the vcs metadata directory 2012-06-12 12:39:15 -07:00
LICENSE Initial commit. 2011-01-09 15:22:25 -08:00
README Update Arcanist README text 2011-11-06 18:12:50 -08:00

README 

WHAT IS ARCANIST?

Arcanist is the command-line tool for Phabricator. It allows you to interact
with Phabricator installs to send code for review, download patches, transfer
files, view status, make API calls, and various other things. You can find
a complete user guide here:

  http://www.phabricator.com/docs/phabricator/article/Arcanist_User_Guide.html

For more information about Phabricator, see:

  http://phabricator.org/