In the beginning, the tar was extracted straight out of the udpcast
stream "tar -xf -" style.

The ability to use tmpfs for staging was added at the request of PNNL. 
Sometime shortly after that, there was an issue with udpcast's threading
and the version of the kernel we were using, which totally broke the
"tar -xf -" style model (which had been the default).

That issue has since been resolved (newer kernels, udpcast
improvements), but I haven't dug back into the code to change the
default back.  I'll take a look now.

Cheers, -Brian


Erich Focht wrote:

>Hi,
>
>after tweaking a bit OSCAR multicast deployment started to work. Sort of...
>When receiving the image, this is done in one huge piece. So the piece is
>transfered to the client being installed and stored in /tmp/multicast.tar.
>
>After a short while the filesystem (which is a tmpfs) fills up and the whole
>thing breaks.
>
>Looking at the autoinstallscript, it seems that there is no loop over sent
>chunks, so sooner or later the tmpfs must get filled up by the multicast
>data.
>
>My node is not particularly small, so I'm wondering whether anybody really
>managed to use the multicast deployment for real life cases where the image is
>significanlty bigger than the available ramdisk storage.
>
>Wouldn't it make more sense to directly pipe the udp-receive output to a tar?
>
>Regards,
>Erich
>
>
>
>  
>

-- 
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 Brian Elliott Finley           Mobile:  630.631.6621
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