Difference between revisions of "WebOS, PlanetLab, Starfish"
Jump to navigation
Jump to search
m (→Readings) |
|||
| Line 13: | Line 13: | ||
== WebOS == | |||
=== Key features === | |||
* High Availability | * High Availability | ||
* Lower Latency | * Lower Latency | ||
| Line 22: | Line 22: | ||
Consensus: WebOS isn't really an distributed OS | Consensus: WebOS isn't really an distributed OS | ||
=== Main components === | |||
* Smart Client | * Smart Client | ||
* WebFS | * WebFS | ||
| Line 29: | Line 29: | ||
* CRISIS authentication/authorization system (Certificates with ACLs) | * CRISIS authentication/authorization system (Certificates with ACLs) | ||
=== Key ideas that were/were not not adopted from WebFS === | |||
Adopted: | Adopted: | ||
| Line 40: | Line 40: | ||
* Smart client (for web sites) | * Smart client (for web sites) | ||
=== What are the pros and cons of using smart clients to do load balancing? === | |||
Pro: | Pro: | ||
Revision as of 19:08, 18 March 2008
Readings
Amin Vahat et al., "WebOS: Operating System Services for Wide Area Applications" (1998)
Larry Peterson et al., "Experiences Building PlanetLab" (2006)
Thomas Anderson and Timothy Roscoe, "Learning from PlanetLab" (2006)
WebOS
Key features
- High Availability
- Lower Latency
- Fault Tolerance
Consensus: WebOS isn't really an distributed OS
Main components
- Smart Client
- WebFS
- Global naming scheme based on URLs
- Process control system
- CRISIS authentication/authorization system (Certificates with ACLs)
Key ideas that were/were not not adopted from WebFS
Adopted:
- General idea of wide area dynamic distribution -> Akamai (but primarily for static content)
- Global naming using URLs
Not Adopted:
- CRISIS
- WebFS (Although WebDAV could be said to be related)
- Smart client (for web sites)
What are the pros and cons of using smart clients to do load balancing?
Pro:
- Distributes computation
- More flexible
Con:
- Vulnerable to Denial of Service or other forms of attacks
- Extra network overhead to locate a service