Einstein
General Information
Einstein is the primary server, and hosts services for LDAP, NFS for home directories, E-mail, Elog.
Network Configuration
Currently has ethernet cable to switch for local (farm) connection, and an ethernet cable to the wall for unh connection.
Hostnames: einstein.unh.edu, einstein.farm.physics.unh.edu
ifconfig
eth0 Link encap:Ethernet HWaddr 00:30:48:63:BB:40
inet addr:10.0.0.248 Bcast:10.0.3.255 Mask:255.255.252.0
inet6 addr: fe80::230:48ff:fe63:bb40/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:30590568 errors:0 dropped:0 overruns:0 frame:0
TX packets:19265796 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:12885415985 (12.0 GiB) TX bytes:37595782118 (35.0 GiB)
Interrupt:106 Base address:0x4000
eth1 Link encap:Ethernet HWaddr 00:30:48:63:BB:41
inet addr:132.177.88.52 Bcast:132.177.91.255 Mask:255.255.252.0
inet6 addr: fe80::230:48ff:fe63:bb41/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:140420169 errors:264 dropped:0 overruns:0 frame:264
TX packets:102671315 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:65061356613 (60.5 GiB) TX bytes:74930930219 (69.7 GiB)
Interrupt:114 Base address:0x6000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:32295792 errors:0 dropped:0 overruns:0 frame:0
TX packets:32295792 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:53090433084 (49.4 GiB) TX bytes:53090433084 (49.4 GiB)
UPS Configuration
Einstein is connected to the APC SmartUPS 2200XL. First install the apcupsd package using yum. Then start it the package and check the status
sudo yum install apcupsd sudo /sbin/service apcupsd start sudo /sbin/service apcupsd status
The official Site and Manual
[apcupsd.org Official Site] User Manual
Hot Swap Information
- Interesting thread to get sata-nv to hotswap: ([1])
- There are drivers available for the MB sata, we could try them: Super Micro MB H8SMU drivers, BUT these appear to be standard Nvidia sata_nv driver.
- SAS Backplane: SAS825TQ
- SAT2-MV8 8-port SATA controller. Uses the sata-mv module which is NOT HOTPLUG CAPABLE. (see http://linux-ata.org/driver-status.html#matrix). THE ONLY WAY TO "HOT PLUG" with this driver is to dismount ALL the drives, then "modprobe -r sata-mv" (make sure it is really gone: lsmod | grep sata) then do the swap, then "modeprobe sata-mv" again.
Hardware Information
- Motherboard: SuperMicro H8SMU User Manual
- nVidia MCP55-Pro chipset
- SAS Backplane: SAS825TQ
- Marvell Technology Group Ltd. MV88SX6081 8-port SATA II PCI-X
Special Considerations for Einstein (Historical)
This information no longer applies and is here for historical reasons. We no longer use amavisd, and so these instructions are not useful.
Einstein is our mail server. That means it runs "amavisd" (a virus scanner) and "spamassasin" a spam filter. Both these codes have some issues with leaving junk around, slowly causing the "/" file system to fill up. When that happens, einstein stops functioning.
Some cleanup can be done as follows:
- stop amavisd and spamassasin:
service amavisd stop service spamassasin stop
- clean out some of their junk:
rm /var/amavis/.razor/razor-agent.log touch /var/amavis/.razor/razor-agent.log chown amavis:amavis /var/amavis/.razor/razor-agent.log chmod o-r /var/amavis/.razor/razor-agent.log rm -f /var/virusmails/* # (Sometimes there are so many, you have to delete in "chunks") rm -rf /tmp
- start up the mail stuff again.
service amavisd start service spamassasin start
There may be other areas that can be clean up, as in all the archived mail from "mailman"? But at least this list will let einstein function again.
