Blog from July, 2013

On Thursday 01 August 2013 between 07:00 and 08:00 local Bremen time servers and network components will be updated.

Server and network operations will be unreliable. Expect unavailable servers and sudden downtimes of services without prior explicit announcement.

If you have to work on files stored on the server during that time, then before the maintenance hour copy the respective files to your local hard disk, work on it locally, and after finishing your work and after the end of the maintenance interval, copy them back onto the server.

For more details on the maintenance hours see the Maintenance Hours page.

Disk faults in central storage system

After loosing two disks in the past 8 weeks already, a third disk in a RAID5 instance failed this evening, with a fourth disk showing temporary errors, too. Ususally this is no big deal, as there are plenty - in this case two - spare disks, which take over automatically. Faulted disks are replaced under a warranty contract ususally during 4-8 hours. Unfortunately the shelf the disks reside in is not under warranty anymore, and a support extension for the whole storage system is obviously too expensive. Currently I am waiting for replacements for the two failed drives, but the discussion on having an expensive support contract or just to replace the drives case-by-case, and then getting quotes on either alternatives and then getting the PR through and then having the order placed has taken too long.

There is a disruption of certain services provided, to which extend I cannot oversee at the moment.

At the moment IRC-IT is trying to salvage data from the particular array to a different storage group in the central storage system, which will take several hours. If data is lost, recovery from backup has to be performed, which can start Monday earliest.

On Thursday 18 July 2013 between 07:00 and 08:00 local Bremen time servers and network components will be updated.

Server and network operations will be unreliable. Expect unavailable servers and sudden downtimes of services without prior explicit announcement.

If you have to work on files stored on the server during that time, then before the maintenance hour copy the respective files to your local hard disk, work on it locally, and after finishing your work and after the end of the maintenance interval, copy them back onto the server.

For more details on the maintenance hours see the Maintenance Hours page.

On Thursday 11 July 2013 between 07:00 and 08:00 local Bremen time servers and network components will be updated.

Server and network operations will be unreliable. Expect unavailable servers and sudden downtimes of services without prior explicit announcement.

If you have to work on files stored on the server during that time, then before the maintenance hour copy the respective files to your local hard disk, work on it locally, and after finishing your work and after the end of the maintenance interval, copy them back onto the server.

For more details on the maintenance hours see the Maintenance Hours page.

The userweb system allows Jacobs University Members to publicly publish web content. The system can be used for arbitrary purposes to the goals of Jacobs University and its members. This especially includes use in learning and teaching, research, and campus life.

Examples of use are setting up web pages for research projects, collecting and/or publishing information for classes, as a platform for use by students to fulfill their class assignments regarding web programming or web design, to organize clubs or events, or as a replacement for the Faculty Web Service.

Every Jacobs University Members can use the system without further requirement, it is setup as a self-service. It features virtual hosts based on Linux operating system, Apache web server, Mysql database, and PHP scripting language. Wordpress, Drupal, and other web applications can be installed by the user. A one-click installer for the Joomla! CMS is already available, more will follow.

Thanks go to the early adopters and supporters, who have used the system successfully during the closed beta phase and helped shaping it.

Please submit feedback, suggestions for improvement, and bug reports via Service Desk for Faculty and Staff.

Please see Userweb System Information for detailed information and support options.

On Thursday 04 July 2013 between 07:00 and 08:00 local Bremen time servers and network components will be updated.

Server and network operations will be unreliable. Expect unavailable servers and sudden downtimes of services without prior explicit announcement.

If you have to work on files stored on the server during that time, then before the maintenance hour copy the respective files to your local hard disk, work on it locally, and after finishing your work and after the end of the maintenance interval, copy them back onto the server.

For more details on the maintenance hours see the Maintenance Hours page.

This is an automatically generated measurement of key performance indicators (KPIs) of Application Provisioning Services for June 2013.

The list of other KPI measurement reports is at KPI Measurements.

KPI Summary Table

KPIs Specified

Not Measured (warning)

Targets Met (plus)

Targets Failed (minus)

13

0

13

0

KPI Measurements

If the specification is met, a (plus) is in the Met column, else a (minus); KPIs not measured have a (warning) there.

SLA

Host

Service

Target

Measured

Met

Remote Login Shell Service

login

SSH

99.000000%

99.998%

(plus)

Teamwork Service

hermia

HTTP

99.000000%

100.0%

(plus)

 

 

HTTPS

99.000000%

99.936%

(plus)

Faculty Web Service

facultyweb

FTP

99.000000%

100.0%

(plus)

 

 

HTTP

99.000000%

100.0%

(plus)

 

 

HTTPS

99.000000%

100.0%

(plus)

SJIRA01

sjira01

HTTP

99.000000%

99.904%

(plus)

 

 

HTTPS

99.000000%

99.905%

(plus)

 

 

SSH

99.000000%

99.917%

(plus)

Alumni Email Server Service

helena

HTTP

99.000000%

100.0%

(plus)

 

 

POP3

99.000000%

99.996%

(plus)

 

 

IMAP

99.000000%

100.0%

(plus)

 

 

SMTP

99.000000%

100.0%

(plus)

Additional Services Information

The following Server Hosting Services are measured as a convenience for the Service Customer to ease service maintenance.
IRC-IT is not responsible for ensuring quality and achieving KPIs of these services.

SLA

Host

Service

Measured

CampusNet Server Service

scnweb01

SNMP

100.0%

 

scnapp01

SNMP

99.997%

 

scnsql01

SNMP

99.986%

WebServer Service

swebsrv01

HTTP

99.97%

 

 

HTTPS

99.975%

 

 

SSH

100.0%

 

swebdev01

HTTP

100.0%

 

 

HTTPS

(not measured)

 

 

SSH

100.0%

 

swebsvn01

HTTP

(not measured)

 

 

HTTPS

(not measured)

 

 

SSH

(not measured)

Schomäcker Server Service

sschomkr01

SNMP

99.989%

 

 

MSSQL

99.984%

GiroWeb Server Service

sgiroweb01

SNMP

99.999%

 

 

HTTP

99.993%

 

 

MSSQL

99.996%

Alumni Application Server Service

alumniweb

HTTP

100.0%

 

 

HTTPS

(not measured)

Career Service Center Server Service

csc

HTTP

99.949%

 

 

SSH

99.993%

SLA Counseling Center

scouncil

HTTP

(not measured)

 

 

SSH

(not measured)

ALEA Server Service

alea

HTTP

(not measured)

IRC-IR Institutional Repository DSPACE

sdspace

HTTP

99.928%

 

 

HTTPS

(not measured)

 

 

SSH

99.926%

SLA Torrent Seeder Geoscience SOPENDTECT

sopendtect

SSH

100.0%

Graduate Student Association Server SLA

sgsa

HTTP

99.933%

 

 

SSH

99.984%