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Hardware for remote visualisation at the LRZ
As of early 2009, the LRZ operates three remote visualisation servers. One is called rvs1.hlrb2.lrz-muenchen.de and is reserved for users of HLRB-II (access to rvs1 is restricted to registered IP addresses), the other two are called gvs1.lrz-muenchen.de and gvs2.lrz-muenchen.de, respectively. Those two machines are reserved for Linux-Cluster users and can be accessed from anywhere (Note: GVS1 and GVS2 are not yet in production!).
RVS1 (for HLRB-II users)
The remote visualisation server rvs1 is a Sun x4600 server with 16 CPU cores (8 dual-core Opterons) and 128 GB RAM running under SuSE Linux Enterprise Server (SLES 10.2). The server rvs1 is connected to a local Raid5 array (mounted on /extern) with a capacity of 2.8 TB (Note: there is no automatic backup for /extern - files that are saved on /extern can disappear without notice! See here for instructions on how to backup your data). Graphics power is provided by four Nvidia Quadro FX5500 graphics cards. Each of the four graphics cards has 1GB graphics RAM.
Access to the parallel file systems of HLRB-II (/ptmp1 and /ptmp2) can be achieved via sshfs. For this, you will have to once create two empty directories in your home directory on rvs1, for example by typing
rvs1> cd
rvs1> mkdir ptmp1
rvs1> mkdir ptmp2
(Note that this has to be done only once!)
Now, you can connect to /ptmp1 or /ptmp2 by typing (you have to replace <group-id> with your Group-ID and <user-id> with your user-ID).
rvs1> cd
rvs1> sshfs user-id@hlrb2:/ptmp1/<group-id>/<user-id> ptmp1
rvs1> sshfs user-id@hlrb2:/ptmp2/<group-id>/<user-id> ptmp2
Unfortunately, these commands have to be entered every time you log-on to rvs1!
Now, you have transparent access to your data. Note, however, that when you manipulate your data, you manipulate your original data on /ptmp1 or /ptmp2! If you don't want this, you can copy your data to /extern (the 3 TByte local disk storage attached to rvs1) and work on the copy of your data there.
You can un-mount these file systems by typing
rvs1> cd
rvs1> fusermount -u ptmp1
rvs1> fusermount -u ptmp2
GVS1 and GVS2 (for Linux-Cluster users)
Important Note:
The remote visualisation servers gvs1 and gvs2 are both Sun x4600 servers with 32 CPU cores (8 quad-core Opterons) and 256 GB RAM each, also running under SuSE Linux Enterprise Server (SLES 10.2). Both gvs1 and gvs2 contain four Nvidia Quadro FX5800 graphics cards. Each one of the eight available graphics cards has 4GB graphics RAM. (Both machines were purchased with funds from D-GRID, hence the name "grid visualisation server", gvs.)
The machines gvs1 and gvs2 are both connected to the lustre filesystem (/lustre and /lustre_projects), giving you transparent access to your data.
All machines have a 10 GBit/s ethernet connection to the LRZ network.