Preliminar Note: In CentOS 7.2, the network is configured trough the network icon of the linux bar. It is pretty similar to any OS, so we will only comment some differences and some tips:



Wired networks, network interface names,  and hostnames



- The hostname can not be changed in there. Instead, use mConfig to change the hostname (mConfgig->General->Hostname.  This will also progagate your changes to /etc/hosts, batch manager, totem, and other systems in the renderfarm will be aware about the changes automatically.


- Ethernet th0 / eth1  mac addresses may appear swapped in comparison with Suse11.  But that is not a problem for Mistika licenses.   


- Hp workstations will name network interfaces starting with  "eth" as usual, but other models (laptops and other desktops) may assign  "strange" names not regognized by Mistika licensing tool.  If that is the case, you can solve iit adding the parameters biosdevname=0 and net.ifnames=0 to the grub launch options. (if you do not know what is the "grub" then it is better to contact the support guys) 


Please note that the important names are the ones shown by this command:


ifconfig


That are the only ones that need to be "eth0" and "eth1" in Mistika systems. Meanwhile, the network icon can use other standards for naming, like enps0 and similar, and that is not a problem at all.



How to setup a wireless wifi network in a Mistika workstation


When using laptops it should be trivial, but adding a wireless port to a workstation is not always easy.  Many wifi pen drives are known to be difficult to install, and they can be slow and unstable. But finally  there is one chipset with good support for CentOS 7.2,  totally plug & play:


Ralink RT5572


Wifi pen drives using that chipset should work straight out of the box with no need for any driver installation on CentOS 7.2, and they cost a few Euros.   If you need Internet from a wifi router, just plug it and all the wifi networks aorund  should appear in the network icon inmediately.  


If you want the opposite (to offer an Access point for your phone ,  in the network options of the same icon just add a "Shared Connection",  select the "AP mode", and do not change anything more. Your phone should be able to connect the workstation now.


Note: Avoid wifi pen drive models that do not have an antenna, or at least an extension cable.  Otherwise half the signal is absorved by the z840 workstation itself, and they are really slow an unstable.



10 Gb networks


In general, most 10Gb adapters work well out of the box in Mistika workstations. But we recommend to use the same model that you are using  in the other side of the network.  Regarding the model,  Intel and Atto model are pretty popular among our clients, and for the particular case of Linux to Mac connections the "SmallTree" brand can be an option.  Using the proper cable is an important point to check, (we have seen many failures due to clients trying to reuse  old 1Gb cables, which in fact where inherited with even  older 100mb infrastructures...) . A decent 10Gb network should provide hundreds of MB/sg transfers, but the application is important. Doing  drag & drop of files is the worst method, slow and can create fragmentation. Instead, use a dedicated application, like an ftp tool in the Windows/Mac side, or Mistika mtransfer in the linux side. Other options are rsync and grsync (which has a nice GUI).  For fastest transfers, just import footage and render with Mistika directly from / to network drives. That is usually the fastest method.  


 

40 Gb networks


In CentOS 7.2 it is already possible to work at several gigabytes per second trough a 40Gb  ethernet network.   But this is more difficult to make it work at nominal speeds, as in general you will need the storage unit, the40Gb HBA, the OS software and drivers  and the transfer application working on synch and very optimised for the particular combination. 


Any small detail that is not optimal in any protocol layer will surely destroy the performance.  These kind of infrastructures really need to be designed as a whole. For this reason, we offer a turnkey Mistika-NAS  solution which can provide 4 Gigabytes per second  sustained with just  one 40Gb ethernet link,  or to divide a 40 Gb port into 4 x 10Gb ports efficiently.   And it is also compatible to be connected into a Mistika-SAN infrastructure for ultimate performance