HIIT researcher visits Deutsche Telekom Labs in Berlin Germany

Mon, 19.11.2012

HIIT MSc Aaron Yi Ding, supervised by Professor Sasu Tarkoma and senior researcher Markku Kojo,  visits Deutsche Telekom Labs in Berlin Germany from September to October of 2012.

Helsinki Distinguished Lecture Series on Future Information Technology

Tue, 13.11.2012

Helsinki Distinguished Lecture Series on Future Information Technology
starts on November 23, 2012, 3:00 pm at Open Innovation House (OIH), Otaniementie 19, Espoo, with an invited lecture from Professor Tuomas Sandholm (Carnegie Mellon University, USA), entitled "Modern Dynamic Kidney Exchanges". Welcome!

Break in at 2012-11-02 18:32 - 18:46

2012-11-02 18:32 to 18:46
14 min
Affected services: 
Services running in Adaptive group's test server

Universe's Apache process and possibly kernel's multipath were twisted themselves. To resolve this, the server was rebooted. All pending updates were installed as well.

Update at 18:48: Universe was up and running at 18:46. The problem was that multipathd failed to fail one path during a service on disk array system at 2012-10-23T13:45 even though it had failed the devices behind it:

mithlond-lun-14 (3600601603c0027009a1ae2bc8a12e011) dm-2 ,
size=2.0T features='0' hwhandler='1 emc' wp=rw
|-+- policy='round-robin 0' prio=0 status=active
| |- #:#:#:# -   #:#   active faulty running
| `- #:#:#:# -   #:#   active faulty running
`-+- policy='round-robin 0' prio=0 status=enabled
  |- 1:0:4:0 sda 8:0   active ready running
  `- 0:0:6:0 sdc 8:32  active ready running

This caused disk IO to fail and thus Apache generated some load and one zombie process:

top - 18:26:31 up 150 days,  6:23, 10 users,  load average: 93.99, 93.97, 93.64


Break in network connections at 2012-10-26 10:40-11:02

2012-10-26 10:40 to 11:02
22 min
Affected services: 
Whole HIIT's network connections

Whole HIIT's network went down 10-26-2012 10:40 and returned 11:02. We are still investigating reason for the break.

Update at 11:02: The break is over.