What are Typical Uses

• Setting Expectations

• Service Level Contract

• Choosing ISPs

• Deciding where to upgrade links

• Identifying problems, and verifying solutions

Slide 27

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• Examples of setting expectations include how long does it take to transfer 50 Tbytes of data between a data generating site and a data analysis site. Can I keep up with 20Mbytes / second on a continuous basis?

• Monitored via pinging several ISDN Internet Service Providers’ POPs to ascertain the quality of their access to SLAC.

• Vendor A response time for 100 byte packets was typically > 65 msec, and packet loss ~ 8%

• Vendor B response time was typically < 30 msec, and packet loss was usually better than 1.5%