Rlogin - Revision history

Rsk at 23:06, 7 February 2025

2025-02-07T23:06:30Z

Rsk at 23:04, 7 February 2025

2025-02-07T23:04:39Z

Rsk at 23:04, 7 February 2025

2025-02-07T23:04:17Z

Rsk at 23:03, 7 February 2025

2025-02-07T23:03:34Z

Rsk at 23:03, 7 February 2025

2025-02-07T23:03:19Z

Rsk: Created page with "= rlogin = [https://rlogin.cs.vt.edu rlogin] is the Computer Science department's student login cluster. Information about access can be found on its [https://rlogin.cs.vt.ed..."

2025-02-07T23:00:34Z

Created page with "= rlogin = [https://rlogin.cs.vt.edu rlogin] is the Computer Science department's student login cluster. Information about access can be found on its [https://rlogin.cs.vt.ed..."

New page

= rlogin =
[https://rlogin.cs.vt.edu rlogin] is the Computer Science department's student login cluster. Information about access can be found on its [https://rlogin.cs.vt.edu homepage], but at time of writing it is available to declared Computer Science majors, as well as anyone currently enrolled in a CS class.

<pre>
rsk@acidburn:~$ curl http://rlogin.cs.vt.edu/nodes.txt 2> /dev/null | grep rlogin | uniq | wc -l
37
rsk@acidburn:~$
</pre>
indicates that the rlogin cluster has 37 nodes, 5 of which are GPU boxes. homedirs are mounted from a ceph cluster, as seen below.
<pre>
[rishik@hackberry ~]$ df -h | grep ceph
homes@00000000-0000-0000-0000-000000000000.cephfs=/home 77T 20T 58T 26% /home
glogin@00000000-0000-0000-0000-000000000000.cephfs=/glogin 77T 20T 58T 26% /opt
web@00000000-0000-0000-0000-000000000000.cephfs=/web/export 48T 1.1T 47T 3% /web
homes@00000000-0000-0000-0000-000000000000.cephfs=/home/ugrads 20T 11T 10T 51% /home/ugrads
[rishik@hackberry ~]$
</pre>

At time of writing, individual nodes are of the following specs:
*Dell R640 1U server
*2x Intel Xeon Gold 5218 2.3Ghz 16 core processors
*384 GB Main memory @ 2933 MT/s
*1TB system drive
*10 Gbit Ethernet interconnect

The Rlogin cluster is colocated in McBryde hall.

[[Category:Campus computing resources]]

@@ Line 4: / Line 4: @@
 Many professors use rlogin as a persistent shell server to run autograder scripts that hit the Canvas API: notably in CS2505, 2506, and Systems.
-Student use is generally permissive: [[User:Rsk]] used it for bruteforcing hashes before he had access to [[VTLUUG:Infrastructure|LUUG hardware]].
+Student use is generally permissive: [[User:Rsk]] used it for bruteforcing hashes before he had access to [[Infrastructure|LUUG hardware]].
 == Setup ==

← Older revision		Revision as of 23:04, 7 February 2025
Line 1:		Line 1:
−	~~= rlogin =~~
	[https://rlogin.cs.vt.edu rlogin] is the Computer Science department's student login cluster. Information about access can be found on its [https://rlogin.cs.vt.edu homepage], but at time of writing it is available to declared Computer Science majors, as well as anyone currently enrolled in a CS class.		[https://rlogin.cs.vt.edu rlogin] is the Computer Science department's student login cluster. Information about access can be found on its [https://rlogin.cs.vt.edu homepage], but at time of writing it is available to declared Computer Science majors, as well as anyone currently enrolled in a CS class.

@@ Line 13: / Line 13: @@
 rsk@acidburn:~$
 </pre>
-indicates that the rlogin cluster has 37 nodes, 5 of which are GPU boxes. homedirs are mounted from a ceph cluster, as seen below.
+indicates that the rlogin cluster has 37 nodes load balanced using ipvs, 5 of which are GPU boxes. homedirs are mounted from a ceph cluster and shared between nodes, as seen below.
 <pre>
 [rishik@hackberry ~]$ df -h  | grep ceph

@@ Line 25: / Line 25: @@
 At time of writing, individual nodes are of the following specs:
-    *Dell R640 1U server
+*Dell R640 1U server
-    *2x Intel Xeon Gold 5218 2.3Ghz 16 core processors
+*2x Intel Xeon Gold 5218 2.3Ghz 16 core processors
-    *384 GB Main memory @ 2933 MT/s
+*384 GB Main memory @ 2933 MT/s
-    *1TB system drive
+*1TB system drive
-    *10 Gbit Ethernet interconnect
+*10 Gbit Ethernet interconnect
 The Rlogin cluster is colocated in McBryde hall.
 [[Category:Campus computing resources]]

@@ Line 1: / Line 1: @@
 = rlogin =
 [https://rlogin.cs.vt.edu rlogin] is the Computer Science department's student login cluster. Information about access can be found on its [https://rlogin.cs.vt.edu homepage], but at time of writing it is available to declared Computer Science majors, as well as anyone currently enrolled in a CS class.
 <pre>