Hello,
We are in the process of making some final decisions regarding the
deployment of Dspace as the Digital Repository used by all primary and
secondary schools all around Greece.
On this point we would like to ask some critical questions concerning
the sustainability of a High Available system with SAN that we are
willing to deploy following the solutions provided by your consortium.
The system that we are willing to develop concerns a repository with
learning objects for primary & secondary level education. Analyzing the
proposed solutions for the development of a safe repository environment
based on fedora or Dspace, we have come with some certain issues.
Our primary goal is to research the sustainability of a scalable DSpace
repository.
After a bibliographical research we came with some statistical results
concerning testing of DSpace for 1 million up to 30 million connections
on the repository.
The results were satisfactorily. So one of our main concerns is if there
are benchmarks concerning the two main repository solutions DSpace and
Fedora according to certain criteria:
1) High availability system for a system (Windows Server 2008 R2
Enterprise or Redhat 6.0 Linux Enterprise) with at least five 9's
availability.
2) Fully scalable system on a cluster environment (with disaster
recovery and load balancing)
3) Maximum number of connections on a worst case scenario around 500
thousands for the same learning object and 1 million connections for
multiple learning objects
4) underlying databases (Oracle, Postgres) which utilize the following
technologies:
* Locking and concurrency
* Performance & tuning
* Object Types
* Procedural languages (PL/SQL vs. T-SQL)
* Clustering Technology
* Reliability
5) Tape backup (8 hr window time frame)
Look forward to hearing from you in the near future with your
recommendations/suggestions on the above mentioned issues.
Best Regards,
Chatzivlastou Stelios
IT Systems Architect
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Computer Technology Institute & Press - Diophantus (CTI)
Strategy & Development Policy Directorate
10 Davaki Str., GR-11526, Ampelokipi, Athens, Greece
tel: +30 210 6930700, direct: +30 210 6930747
fax: +30 210 6930750
e.mail: mailto:[email protected] <mailto:[email protected]>
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