From the vizualisation nodes, you can use four filesystems :
the descriptions of the first three can be found here.
the /tmp, which is “local” to the nodes takes advantage of the high performance throuput of the technology SSD. This volatile filesystem can be use like a work space of more than 600 Gb.
Be carefaul that this filesystem will not keep the data on a long terme. If you want to keep your data secure between jobs, you have to use secure filesystem like the $HOME or the $STOREDIR.