From: Eric Wong <normalperson@yhbt.net>
To: "Lin Jen-Shin (aka godfat 真常)" <godfat@godfat.org>
Cc: unicorn list <mongrel-unicorn@rubyforge.org>
Subject: Re: About Unicorn Rack handler
Date: Wed, 4 Nov 2009 23:29:00 -0800 [thread overview]
Message-ID: <20091105072900.GA11050@dcvr.yhbt.net> (raw)
In-Reply-To: <15d206ce0911042047i54ab72a2wd579efb523642026@mail.gmail.com>
"Lin Jen-Shin (aka godfat 真常)" <godfat@godfat.org> wrote:
> 2009/11/5 Lin Jen-Shin (aka godfat 真常) <godfat@godfat.org>:
> > On Thu, Nov 5, 2009 at 1:07 AM, Eric Wong <normalperson@yhbt.net> wrote:
> >> On the other hand, does Innate make it possible to do transparent
> >> upgrades (since rackup does not)? I'll look into it a bit more later...
> >
> > I am not sure what do you mean transparent here,
>
> Oops, accidentally sent incomplete mail, sorry.
>
> I am not sure what do you mean transparent here,
> but I would guess Innate work better than rackup. :p
Transparent, zero-downtime upgrades (USR2 + QUIT) that Unicorn
can do like nginx[1].
The issue here with rackup is that it changes ARGV with the option
parser before Unicorn can get to it. So when Unicorn receives the USR2
signal and respawns itself, it won't be able to spawn a child with the
same command-line options as its parent. Using the "unicorn" script
will allow it to always save its ARGV before OptionParser has a chance
to mangle it.
[1] - http://unicorn.bogomips.org/SIGNALS.html
--
Eric Wong
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next prev parent reply other threads:[~2009-11-05 7:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-04 12:37 About Unicorn Rack handler Lin Jen-Shin (aka godfat 真常)
2009-11-04 17:07 ` Eric Wong
2009-11-05 4:43 ` Lin Jen-Shin (aka godfat 真常)
2009-11-05 4:47 ` Lin Jen-Shin (aka godfat 真常)
2009-11-05 7:29 ` Eric Wong [this message]
2009-11-05 7:28 ` Eric Wong
2009-11-05 15:13 ` Lin Jen-Shin (aka godfat 真常)
2009-11-05 23:19 ` Eric Wong
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