fork or thread?

Hi,

I'm trying to write a script within the VMware vSphere Perl SDK. The
script will backup some VMs where those have it defined in Vsphere.
Currently I have the problem, that I get a timeout on my authenticated
connect, and can't reconnect (I don't know why, and the VMWare forums
aren't helpful there). So I thought about authenticating, and then
forking or creating a thread that does something in the VSphere to keep
the authentication alive. My problem here is that I don't know how to
end the forked/threaded process, aber all backups in the parent process
are done. This is the first time I have to do forking/threading, I read
about both but still am unsure about how to communicate to the child
that it should exit it's infinite loop.
Is there any best practice or something I should read about and don't
know?

Lars
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Re: fork or thread?

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On 19/1/2010 3:11 ??, Oeschey, Lars (I/ET-83, extern) wrote:
> Hi,
>
> I'm trying to write a script within the VMware vSphere Perl SDK. The
> script will backup some VMs where those have it defined in Vsphere.
> Currently I have the problem, that I get a timeout on my authenticated
> connect, and can't reconnect (I don't know why, and the VMWare forums
> aren't helpful there). So I thought about authenticating, and then
> forking or creating a thread that does something in the VSphere to keep
> the authentication alive. My problem here is that I don't know how to
> end the forked/threaded process, aber all backups in the parent process
> are done. This is the first time I have to do forking/threading, I read
> about both but still am unsure about how to communicate to the child
> that it should exit it's infinite loop.
> Is there any best practice or something I should read about and don't
> know?
>
> Lars
> _______________________________________________

read the code here
http://github.com/book/HTTP-Proxy/blob/master/lib/HTTP/Proxy /Engine/Legacy.pm

It will enlighten you !
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tel;fax:+30 211 7503 701
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RE: fork or thread?

Authentication to VI times out after 30 minutes, you will need to get a new handle if your process takes (or can take) longer than that to complete.

________________________________________
From: activeperl-bounces@listserv.ActiveState.com [activeperl-bounces@listserv.ActiveState.com] On Behalf Of Oeschey, Lars (I/ET-83, extern) [extern.Lars.Oeschey@AUDI.DE]
Sent: Tuesday, January 19, 2010 7:11 AM
To: activeperl@listserv.activestate.com
Subject: fork or thread?

Hi,

I'm trying to write a script within the VMware vSphere Perl SDK. The
script will backup some VMs where those have it defined in Vsphere.
Currently I have the problem, that I get a timeout on my authenticated
connect, and can't reconnect (I don't know why, and the VMWare forums
aren't helpful there). So I thought about authenticating, and then
forking or creating a thread that does something in the VSphere to keep
the authentication alive. My problem here is that I don't know how to
end the forked/threaded process, aber all backups in the parent process
are done. This is the first time I have to do forking/threading, I read
about both but still am unsure about how to communicate to the child
that it should exit it's infinite loop.
Is there any best practice or something I should read about and don't
know?

Lars
_______________________________________________
ActivePerl mailing list
ActivePerl@listserv.ActiveState.com
To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs
_______________________________________________
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ActivePerl@listserv.ActiveState.com
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RE: fork or thread?

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setup a signal handler in each child thread and make it return when you sen=
d a signal=2C or=2C if the child thread
knows when it's done you can just 'return' and it will become joinable.

Also as in my previous email remember that the connection to VI will timeou=
t after 30 minutes.

> Date: Tue=2C 19 Jan 2010 15:14:21 +0200
> From: angelos@unix.gr
> To: extern.Lars.Oeschey@AUDI.DE
> Subject: Re: fork or thread?
> CC: activeperl@listserv.activestate.com
>=20
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>=20
> On 19/1/2010 3:11 ??=2C Oeschey=2C Lars (I/ET-83=2C extern) wrote:
> > Hi=2C
> >=20
> > I'm trying to write a script within the VMware vSphere Perl SDK. The
> > script will backup some VMs where those have it defined in Vsphere.
> > Currently I have the problem=2C that I get a timeout on my authenticate=
d
> > connect=2C and can't reconnect (I don't know why=2C and the VMWare foru=
ms
> > aren't helpful there). So I thought about authenticating=2C and then
> > forking or creating a thread that does something in the VSphere to keep
> > the authentication alive. My problem here is that I don't know how to
> > end the forked/threaded process=2C aber all backups in the parent proce=
ss
> > are done. This is the first time I have to do forking/threading=2C I re=
ad
> > about both but still am unsure about how to communicate to the child
> > that it should exit it's infinite loop.
> > Is there any best practice or something I should read about and don't
> > know?
> >=20
> > Lars
> > _______________________________________________
>=20
> read the code here
> http://github.com/book/HTTP-Proxy/blob/master/lib/HTTP/Proxy /Engine/Legac=
y.pm
>=20
> It will enlighten you !
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____________________________________________________________ _____
Hotmail: Powerful Free email with security by Microsoft.
http://clk.atdmt.com/GBL/go/196390710/direct/01/=

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setup a signal handler in each child thread and make it return when you sen=
d a signal=2C or=2C if the child thread
knows when it's done you can jus=
t 'return' and it will become joinable.

Also as in my previous email=
remember that the connection to VI will timeout after 30 minutes.

&=
gt=3B Date: Tue=2C 19 Jan 2010 15:14:21 +0200
>=3B From: angelos@unix.=
gr
>=3B To: extern.Lars.Oeschey@AUDI.DE
>=3B Subject: Re: fork or=
thread?
>=3B CC: activeperl@listserv.activestate.com
>=3B
&g=
t=3B -----BEGIN PGP SIGNED MESSAGE-----
>=3B Hash: SHA1
>=3B
=
>=3B On 19/1/2010 3:11 ??=2C Oeschey=2C Lars (I/ET-83=2C extern) wrote: r>>=3B >=3B Hi=2C
>=3B >=3B
>=3B >=3B I'm trying to writ=
e a script within the VMware vSphere Perl SDK. The
>=3B >=3B script =
will backup some VMs where those have it defined in Vsphere.
>=3B >=
=3B Currently I have the problem=2C that I get a timeout on my authenticate=
d
>=3B >=3B connect=2C and can't reconnect (I don't know why=2C and =
the VMWare forums
>=3B >=3B aren't helpful there). So I thought abou=
t authenticating=2C and then
>=3B >=3B forking or creating a thread =
that does something in the VSphere to keep
>=3B >=3B the authenticat=
ion alive. My problem here is that I don't know how to
>=3B >=3B end=
the forked/threaded process=2C aber all backups in the parent process
&=
gt=3B >=3B are done. This is the first time I have to do forking/threadin=
g=2C I read
>=3B >=3B about both but still am unsure about how to co=
mmunicate to the child
>=3B >=3B that it should exit it's infinite l=
oop.
>=3B >=3B Is there any best practice or something I should read=
about and don't
>=3B >=3B know?
>=3B >=3B
>=3B >=3B =
Lars
>=3B >=3B _______________________________________________
&g=
t=3B
>=3B read the code here
>=3B http://github.com/book/HTTP-Pr=
oxy/blob/master/lib/HTTP/Proxy/Engine/Legacy.pm
>=3B
>=3B It wil=
l enlighten you !
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