![Pegasus Home](../_derived/home.htm_cmp_blank100_vbtn.gif)
![Overview](../_derived/overview.htm_cmp_blank100_vbtn.gif)
![Usage](../_derived/usage.htm_cmp_blank100_vbtn.gif)
![Diskless clusters](../_derived/administration.htm_cmp_blank100_vbtn.gif)
![Thomas Vojta](../_derived/ext1025_cmp_blank100_vbtn.gif)
![Research Group](../_derived/ext1026_cmp_blank100_vbtn.gif)
![Physics Department](../_derived/ext1023_cmp_blank100_vbtn.gif)
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Cluster Layout
![Pictures](_derived/pictures.htm_cmp_blank000_hbtn.gif)
- cluster server pegasus4 has two network interfaces, one connects to the Missouri S&T campus network (131.151.x.x) and Internet
- the other network interface connects server to 191 compute nodes (private Gigabit network 192.168.0.x)
- compute nodes are diskless and stateless, booted via PXE and the pxelinux network boot loader
- root file system of the compute nodes resides in 128Mb tmpfs in RAM; its content is downloaded
via PXE/TFTP from the cluster server
- compute nodes mount /home and /usr via NFS from the cluster server
![](../images/layout2018.jpg)
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