Phase 2

Storage

Storage is more difficult to scale in a distributed environment than computing.

Size

A few projects have large requirements.

Bandwidth

Is more expensive than size.

Comparing raw size, SCSI & FibreChannel 5-8 times more expensive than (S)ATA. 1-3 times when achieved bandwidth is considered.

Availability

Access time and bandwidth. What should we move? Job or data?

Persistence

Not everything needs to be stored in five copies on tape eternally. What is the cost of reproducing the data?

Integrity

We all want data integrity.

Secrecy

In an academic environment, serecy is seldom a big issue.