Grid@IASA

computer room

As user applications demand an ever-increasing amount of processing power, individual computing sites frequently find their resources inadequate to respond to the growing demand of their users. In this ever-demanding and ever-changing world, Grid Computing can provide a dependable, flexible and seemingly non-ending source of computing power. Having recognized the opportunity provided by Grid computing, the IASA IT/Grid division (partner of GRNET), through the hosting of the HG-02-IASA and GR-06-IASA clusters, participates in the largest European Grid infrastructure ever built: the EGEE Infrastructure.


HG-02-IASA

Processing power/services

HG-02-IASA site

The HG-02-IASA site has been a production site since the 23rd of March 2006 (the running status of the site is provided here - GStat portal). The node’s computing hardware consists of two racks of 64 HP servers with dual Intel Xeon CPUs at 3.4GHz, plus 1 more node Intel(R) Pentium(R) 4 CPU 3.20GHz.
There are 4 HP DL360 servers, each with two 80GB SCSI hard disks running RAID1, 2GB RAM and two CPUs, that comprise the core elements of the EGEE infrastructure (management, computing elements - CEs and storage element - SE). The remaining 59 machines (HP DL140 servers) act as Working Nodes, each of them has 80GB SATA hard disk, 2GB RAM and two processors. One more DL140 that acts as R-GMA (MON) + top-level BDII service is also available. Finally, a local (non-official) UI node has been configured to support the IASA Grid community.
The core services that are provided by the HG-02-IASA grid site are listed in the Table 1 and are presented graphically at Figure 1.

*a full list of Grid acronyms can be found here.

Service FQDN H/W ID

(see Figure 1)

 HW Type
gLite-CE glite-ce01.marie.hellasgrid.gr C29 HP DL360
LCG-CE ce01.marie.hellasgrid.gr C30 HP DL360
SE se01.marie.hellasgrid.gr C31 HP DL360
WNs wn[001-060].marie.hellasgrid.gr - HP DL140
Management server n.a n.a HP DL360
UI ui01.marie.hellasgrid.gr C65 P4 Intel
RGMA(MON)  + top-level BDII mon.marie.hellasgrid.gr

bdii.marie.hellasgrid.gr (alias)

 C52 HP DL140

Table 1: The core services provided by the HG-02-IASA.

HG-02-IASA draw

Figure 1: A graphical representation of the HG-02-IASA cluster (HW ids are also presented).

Software

The main SW that is deployed on the HG-02-IASA servers is:

  • OS: Scientific linux 3.0.5 (more...)
  • Middleware: gLite-3.0.2 (more...)
  • Management: Quattor (more...)
  • Mass command exec: pdsh


Storage

storage array

The site includes a SAN that controls the 14 SCSI disks (300GB each) of the main storage and one fiber switch to connect the servers to the storage array.  The total raw capacity of the Storage Element is 4.2TB.









GR-06-IASA

Processing power/services

GR-06-IASA site

The GR-06-IASA site has been also a production site since the 23rd of March 2006 (the running status of the site is provided here - GStat portal). The node’s computing hardware consists of two racks of 13 servers with dual AMD Athlon CPUs at 2.0GHz. All servers have 80GB hard disks, 1GB RAM and two CPUs, that comprise the core elements of the EGEE infrastructure (computing elements - CEs, storage element - SE and monitoring - MON). The remaining 10 machines act as Working Nodes. 






The core services that are provided by the GR-06-IASA grid site are listed in the Table 2 and are presented graphically at Figure 2.

*a full list of Grid acronyms can be found here.

Service FQDN H/W ID

(see Figure 1)

 HW Type
LCG-CE ce02.marie.hellasgrid.gr GC1 AMD Athlon
SE se02.marie.hellasgrid.gr GC3 AMD Athlon
WNs wn[01-10].marie.hellasgrid.gr - AMD Athlon
RGMA(MON) mon02.marie.hellasgrid.gr GC2 AMD Athlon

Table 2: The core services provided by the GR-06-IASA.

GR-06-IASA draw

Figure 2: A graphical representation of the GR-06-IASA cluster (HW ids are also presented).

Software

The main SW that is deployed on the HG-02-IASA servers is:

  • OS: Scientific linux 3.0.5 (more...)
  • Middleware: gLite-3.0.2 (more...)
  • Management: Quattor (more...)
  • Mass command exec: pdsh