RE: Mental Ray Standalone distributed rendering slaves render really slow!

["Halfdan Ingvarsson" <hingvars(at)Softimage.COM>]

No. It only has to be transmitted once. But the data is requested on demand. Ie. an object's geometry is only requested at the first tile it shows up in but it stays on the slave until no longer needed (or if it runs out of memory).

 

 - ½

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From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Mathieu Leclaire
Sent: 30-Apr-2008 16:28
To: XSI(at)Softimage.COM
Subject: RE: Mental Ray Standalone distributed rendering slaves render really slow!

Oh but I?m still curious to know if the data has to be repassed for each tile or if it stays in memory for the next tiles once it gets it the first time?

 

Mathieu Leclaire

R&D Programmer

Hybride Technologies

 

"Yesterday is history, tomorrow is a mystery, today is a gift and that is why it's called the present"

 

-----Original Message-----
From: Halfdan Ingvarsson [mailto:hingvars(at)Softimage.COM]
Sent: Wednesday, April 30, 2008 3:44 PM
To: XSI(at)Softimage.COM
Subject: RE: Mental Ray Standalone distributed rendering slaves render really slow!

 

The slaves have to get their data from somewhere. If the time of sending the data, over the network to the slave, exceeds that of the time it takes to render the whole frame on the master, then it's not worth pursuing. Increasing the tile size isn't going to do much for you in this case.

 

Distributed rendering is good for some things (large image size, or small scene + lots of FG/GI), bad for others (large scene data).

 

 - ½

 

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From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Mathieu Leclaire
Sent: 30-Apr-2008 15:35
To: XSI(at)Softimage.COM
Subject: RE: Mental Ray Standalone distributed rendering slaves render really slow!

So what does that mean? It?s normal? I should use larger tiles to maximize the slaves resources or once the tesselated scene data is passed, the slave keeps it in memory for future tiles and it shouldn?t affect the speed anymore?

 

Mathieu Leclaire

R&D Programmer

Hybride Technologies

 

"Yesterday is history, tomorrow is a mystery, today is a gift and that is why it's called the present"

 

-----Original Message-----
From: Halfdan Ingvarsson [mailto:hingvars(at)Softimage.COM]
Sent: Wednesday, April 30, 2008 3:15 PM
To: XSI(at)Softimage.COM
Subject: RE: Mental Ray Standalone distributed rendering slaves render really slow!

 

The cost is mostly in the master sending the tesselated scene data over.

 

 - ½

 

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From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On Behalf Of Mathieu Leclaire
Sent: 30-Apr-2008 15:09
To: XSI(at)Softimage.COM
Subject: Mental Ray Standalone distributed rendering slaves render really slow!

Hi guys,

 

I?ve configured my Mental Ray Standalone for distributed rendering. When ray3 is launched, the master can easily render 50 times faster then the slaves can. Is this normal? Did I miss-configure something in my XSI installation or is there a problem with my network? It?s faster to render all the tiles directly on my master even though it is a pretty heavy scene. I don?t get it. Is anyone able to enlighten me?

 

Thanks.

 

 

Mathieu Leclaire

R&D Programmer

Hybride Technologies

 

"Yesterday is history, tomorrow is a mystery, today is a gift and that is why it's called the present"