Annual Report 2004


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/1995-2003/

    External Telecommunication Channels

At present, JINR leases a 45 Mbps channel to Moscow from the Russian Satellite Communications Company (RSCC "Dubna"); thus, JINR has access to the Russian networks and information resources, as well as access to the international channel through shared RBNet+RUNNet in the common data stream 2.5 Gbps. The Dubna-Moscow channel bandwidth increasing up to 1 Gbps will be done in 2005. Figure 1 shows the immediate future of the JINR external channels.

Planned JINR external channels

Fig. 1. Planned JINR external channels

Total 2004 incoming traffic was 36.1 TB (19.89 TB in 2003) and outgoing traffic was 43.64 TB (24.43 TB in 2003).

Table 1 shows year traffic distribution among the JINR subdivisions (>500 GB on incoming traffic).

Table 1
JINR subdivision Incoming
traffic,
TB
Outgoing
traffic,
TB
Incoming
traffic,
%
Outgoing
traffic,
%
LIT 8,5 11,24 23,54 25,75
DLNP 5,34 6,24 14,8 14,29
FLNR 3,98 4,01 11,03 9,2
Servers 3,96 1,31 10,98 3,0
LPP 3,6 3,86 9,98 8,85
VBLHE 2,4 1,6 6,64 3,66
Uni-Dubna 2,26 2,09 6,26 4,78
BLTP 2,23 2,0 6,17 4,59
FLNP 1,73 8,42 4,78 19,3
Adm. 0,66 1,53 1,79 3,5


    JINR Local Area Network (JINR LAN)

Currently the IP addresses database contains 4801 registered JINR LAN elements (4506 in 2003).

The spectrum of activities aimed at creation of a reliable, protected and high-speed JINR LAN includes:

  • Development of a fault-tolerant architecture of the JINR LAN Backbone.
  • Creation of a system to monitor and control the JINR LAN.
  • Carrying out organizational and technical measures to provide the 1 Gbps data transfer rate across the JINR Laboratories.
  • Creation of a network security system of the JINR LAN.
  • Optimization of the information traffic across the JINR LAN.

All fiber optic cabling to have the transport media for the JINR Gigabit Ethernet LAN was made in 2003. The communication equipment to make this Gigabit Ethernet LAN was purchased in 2003 too.

During the 1st quarter of 2004 all the work to launch Gigabit Ethernet LAN was done: testing of the new single-mode fiber optic communication lines, creation of the switches configuration files and verifying the proper functioning of first component parts of the structure and then the entire JINR Gigabit Ethernet LAN.

The JINR Gigabit Ethernet LAN became available for users in March 2004. Cisco Catalyst 3550 family switches in 8 JINR main divisions, being connected by the fiber optic segments to the main Cisco Catalyst 6509 switch in LIT, formed the "star" topology of the JINR Gigabit Ethernet LAN backbone (Fig. 2).

Logical scheme of JINR LAN

Fig. 2. Logical scheme of JINR LAN

The investigations on network traffic were continued. The Principal Component Analysis, especially the "Caterpillar"-SSA approach, was applied to the network traffic measurements. This approach is proved to be very efficient for understanding the main features of terms forming the network traffic. The statistical analysis of leading components has demonstrated that a few first components already form the main part of information traffic. The residual components play a role of small irregular variations which do not fit in the basic part of network traffic and can be interpreted as a stochastic noise. Based on the feature characteristics of residual components, a statistical method for the selection and elimination of residuals from the whole set of principal components was developed [1].

A modification of the Prigogine-Herman kinetic equation related to the network traffic was presented. A solution of this equation for homogeneous time-independent situations and for the log-normal desired speed distribution function, clearly shows two modes corresponding to individual flow patterns (low concentration mode) and to collective flow patterns (traffic jam mode). For situations with low concentration there is almost a linear dependence of the information flow on the concentration and the higher the average speed, the lower the concentration at which the optimum flow takes place. When approaching the critical concentration, there are no essential differences in the flow for different average speeds, whereas for individual flow regions there are dramatic differences [2].

About 450 staff members of JINR and other research centres are using the JINR Central Computing and Information Complex (JINR-CCIC). The JINR CCIC users distributed over JINR divisions are shown in Table 2.

Table 2
LIT DLNP LPP VBLHE FLNR BLTP Other
institutes
FLNP Adm.
157 100 52 42 28 14 24 12 8

The JINR ——IC is part of the Russian Grid Segment used for LHC and other applications.

Nowadays the JINR ——IC comprises: an interactive cluster of common access; a common access computing farm for carrying out simulation and data processing for a number of physics experiments in which JINR participates; a computing farm for the tasks of the LHC experiments; a computing farm for carrying out parallel calculations on the basis of the modern network technologies (Myrinet, SCI, etc.); LCG-2 computing farm included into a worldwide computing infrastructure; mass storage resources on disk RAID-arrays.

The total CCIC performance is 8.0 kSPI95, disk space 14.0 TB. The average CCIC loading was 32%. The average loading of a common access farm is 50% during the year and 82.25% in April 2004.

JINR CCIC facilities were used by the experiments E391A (KEK), KLOD , COMPASS, D0, DIRAC, HARP, CMS, ALICE, ATLAS, HERAb, H1, NEMO, OPERA, HERMES, IREN for mass event production, data simulation and analysis.

Table 3 shows the percentage of CPU time used by JINR Laboratories on CCIC PC farms.

Table 3
Subdivision LIT FLNR DLNP LPP FLNP BLTP VBLHE Event
production
Other
CPU time, % 7 1 14 15 3 14 8 36 2


    Computing Service and Creation of a JINR Grid Segment

The Dubna-Grid Project was elaborated in 2004 in collaboration of LIT, University "Dubna", Directorate of the Programme for development of the science city of Dubna, University of Chicago (USA), and University of Lund (Sweden). The main aim of the project is creation of a Grid testbed on the basis of resources of Dubna scientific and educational establishments, in particular, JINR Laboratories, International University "Dubna", secondary schools and other organizations. This project will allow one to use more than 1000 CPU on the basis of Grid technologies.

In 2004, the Laboratory also continued the work on creation of computing services and Grid-technology deployment in data processing. Adaptation and support of new versions of ANAPHE (former LHC++) Library for Linux, Windows and Sun Solaris platforms were performed. Technical and programming assistance of the software development for LHC experiments was continued. Maintained were the existing software for LHC (ATLAS, ALICE, CMS, and LHCb) and non-LHC experiments.

Participation in Pre-Challenge production for ALICE, ATLAS, CMS, and LHCb and DC04 was continued in 2004. In the framework of JINR participation in the LCG (LHC Computing Grid) project, a number of works were performed. Tests on data transferring by the GridFTP protocol (GlobusToookit 3) were made. The server for monitoring of Russian LCG sites was installed and study of GridICE and MapCenter tools usage for monitoring of Russian sites was performed; the toolkit GoToGrid on the automatic installation and tuning of the LCG-2 package was developed; software for installation and control of MonaLisa clients on the basis of RMS (Remote Maintenance Shell) was designed.

Development of the LCG web-portal was in progress: a new system on collecting, keeping and visualization of monitoring data on CPU and Storage Resources usage at the Russian LCG sites and a new informational block on the CPU and Storage Resources which are available at the Russian LCG sites were included.

Events database and repository of generators were created. Dynamical home-page http://hepweb.jinr.ru has been created for testing Monte Carlo Generators of physical processes. The page also allows one to estimate the main properties of hadron-nucleus and nucleus-nucleus interactions (includes FRITIOF model, HIJING model, and tools for Glauber and Reggeon theories calculation).

Maintenance of the JINR Program Library was in progress. New documents have been prepared and introduced in WWW. They include realization at JINR of electronic access to the CPCLIB, CERNLIB ( http://www.jinr.ru/programs/), adaptation programs on the JINR computer platforms, and filling the JINRLIB (20 new programs have been included and tested).

A systematic supplement and maintenance of the earlier created databases and information systems continued taking into account the users' needs. Among these are:

Steady support of one of the main general-purpose FTP-servers was provided: faxe.jinr.ru. This server also was utilized for support and load on call of antivirus programs into JINR PCs.

The LIT employees fulfilled necessary work for the JINR's STD AMS on the software and centralized support of administrative databases, including modernization of the interface and contents of the database "JINR Staff", software support of the JINR Accounting Department and accounting departments of the Institute's sub-divisions, processing of information on pension benefits at JINR for the Pension Foundation, etc.

© Laboratory of Information Technologies, JINR, Dubna, 2005
T.Strizh