Difference between revisions of "Hardware servers"

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C&CZ beheert ca. 470 Linux workstations
 
C&CZ beheert ca. 470 Linux workstations
en servers, ca. 800 servers en werkplekken met MS-Windows en ca. 20 Sun/Solaris/SPARC servers, voornamelijk in het domein <tt>science.ru.nl</tt>. Dual-boot machines (Linux/Windows) worden hierbij dubbel geteld.
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en servers, ca. 800 servers en werkplekken met MS-Windows en ca. 20 Sun/Solaris/SPARC servers, voornamelijk in het domein <tt>science.ru.nl</tt>. Dual boot machines (Linux/Windows) worden hierbij dubbel geteld.
 
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C&amp;CZ manages ca. 470 Linux workstations, ca. 800 servers and workstations with MS-Windows and ca. 20 Sun/Solaris/SPARC servers, primarily in the domain <tt>science.ru.nl</tt>. Dual-boot Windows/Linux machines are counted twice.
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C&amp;CZ manages ca. 470 Linux workstations, ca. 800 servers and workstations with MS-Windows and ca. 20 Sun/Solaris/SPARC servers, primarily in the domain <tt>science.ru.nl</tt>. Dual boot Windows/Linux machines are counted twice.
 
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C&CZ beheert voor afdelingen werkplekken met Ubuntu Linux of MS-Windows. Ook zijn er in de PC-kamers  en het Studielandschap algemeen toegankelijke werkplekken waarvan iedereen met een [[Studenten_login|Science login]] gebruik kan maken, maar ook alle RU-medewerkers en RU-studenten en gasten met een tijdelijke login. Vrijwel alles is dual-boot, de gebruiker kan kiezen uit Ubuntu Linux en MS-Windows.
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C&CZ beheert voor afdelingen werkplekken met Ubuntu Linux of MS-Windows. Ook zijn er in de PC-kamers  en het Studielandschap algemeen toegankelijke werkplekken waarvan iedereen met een [[Studenten_login|Science login]] gebruik kan maken, maar ook alle RU-medewerkers en RU-studenten en gasten met een tijdelijke login. Vrijwel alles is dual boot, de gebruiker kan kiezen uit Ubuntu Linux en MS-Windows.
 
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C&amp;CZ manages (for departments) workstations with Ubuntu Linux or MS-Windows. There are also workstations in the PC-rooms and Study area for general use by anybody with a [[Studenten_login|Science login]], but also by all RU employees and students and guests with a temporary login. Almost all those machines are dual-boot, the user can choose to boot Ubuntu Linux or MS-Windows.
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C&amp;CZ manages (for departments) workstations with Ubuntu Linux or MS-Windows. There are also workstations in the PC-rooms and Study area for general use by anybody with a [[Studenten_login|Science login]], but also by all RU employees and students and guests with a temporary login. Almost all those machines are dual boot, the user can choose to boot Ubuntu Linux or MS-Windows.
 
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Begin 2006 is door een aantal afdelingen een stapel Sun Fire X4100 dual-processor dual-core machines aangeschaft om te voorzien in de behoefte aan Linux rekencapaciteit. In 2007 is [[software_cluster_|Cluster software]] ge&iuml;nstalleerd. Afdelingen hebben met enige regelmaat nieuwe machines aangeschaft, die toegevoegd zijn aan het cluster. Per oktober 2011 telde het cluster 512 cores en 1024 CUDA cores.
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Begin 2006 is door een aantal afdelingen een stapel Sun Fire X4100 dual processor dual core machines aangeschaft om te voorzien in de behoefte aan Linux rekencapaciteit. In 2007 is [[software_cluster_|Cluster software]] ge&iuml;nstalleerd. Afdelingen hebben met enige regelmaat nieuwe machines aangeschaft, die toegevoegd zijn aan het cluster. Per oktober 2011 telde het cluster 512 cores en 1024 CUDA cores.
 
De [http://cricket.science.ru.nl/grapher.cgi?target=%2Fclusternodes CPU-load van de clusternodes] wordt automatisch bijgehouden.  
 
De [http://cricket.science.ru.nl/grapher.cgi?target=%2Fclusternodes CPU-load van de clusternodes] wordt automatisch bijgehouden.  
 
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Beginning 2006, a number of departments bought a bunch of Sun Fire X4100 dual-processor dual-core machines in order to have more Linux computing power. In 2007 [[software_cluster_|Cluster software]] was installed. Departments have regularly bought new machines that were added to the cluster. As of October 2011, the cluster totalled 512 cores and 1024 CUDA cores.
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Beginning 2006, a number of departments bought a bunch of Sun Fire X4100 dual processor dual core machines in order to have more Linux computing power. In 2007 [[software_cluster_|Cluster software]] was installed. Departments have regularly bought new machines that were added to the cluster. As of October 2011, the cluster totalled 512 cores and 1024 CUDA cores.
 
The [http://cricket.science.ru.nl/grapher.cgi?target=%2Fclusternodes CPU-load of the clusternodes] is being monitored.
 
The [http://cricket.science.ru.nl/grapher.cgi?target=%2Fclusternodes CPU-load of the clusternodes] is being monitored.
 
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Revision as of 11:05, 28 August 2013

Servers and Workstations

C&CZ manages ca. 470 Linux workstations, ca. 800 servers and workstations with MS-Windows and ca. 20 Sun/Solaris/SPARC servers, primarily in the domain science.ru.nl. Dual boot Windows/Linux machines are counted twice.


Workstations

C&CZ manages (for departments) workstations with Ubuntu Linux or MS-Windows. There are also workstations in the PC-rooms and Study area for general use by anybody with a Science login, but also by all RU employees and students and guests with a temporary login. Almost all those machines are dual boot, the user can choose to boot Ubuntu Linux or MS-Windows.

Login-servers

  • lilo and stitch, the Linux login-server for employees and students.

Ways to log into the login servers:

  • With SSH (Secure Shell), which is an encrypted connection, so passwords can't be sniffed. An SSH connection is possible from all over the Internet. It is possible to tunnel X11-traffic (of Xming or Xwin32).

The automatic monitoring of the servers can be accessed on the web.

Compute servers/cluster

Beginning 2006, a number of departments bought a bunch of Sun Fire X4100 dual processor dual core machines in order to have more Linux computing power. In 2007 Cluster software was installed. Departments have regularly bought new machines that were added to the cluster. As of October 2011, the cluster totalled 512 cores and 1024 CUDA cores. The CPU-load of the clusternodes is being monitored.

Mail server

On the Do-It-Yourself website each user can see which mail server will store incoming mail for his account. Mail can be accessed with POP3 and IMAP over SSL. In every domain managed by C&CZ the alias smtp.science.ru.nl points to the machine that accepts mail with the SMTP-protocol. N.B.: If one uses a (non-RU) Internet provider, our mail server will only accept mail for our (RU) mail-addresses. Most other mail will not be accepted ("Relaying Denied!"). One can prevent this by using the smtp-server of the Internet-provider or by using Authenticated SMTP.

The amount of mail and spam is being logged.

WWW servers

There are several WWW-servers with websites and web applications.

Printer servers

The alias printer-srv.science.ru.nl points to the machine that manages almost all queues for the network printers.

Disk servers

These servers share different types of files, e.g. home-directories, application-software and disks for departments and groups. All modern servers only have redundant disks, sometimes by using "mirroring", sometimes by use of a "RAID-array". That means that loss of only 1 disk will nor cause any problem for users.

For more information, e.g. about renting disc space for departments, see our disc space page.

Backup servers

Almost all disks that are managed by C&CZ, are being backupped regularly, in order to be able to restore data in case of small or large calamities.