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Bug 37699

Summary: [plan item] Improve update manager downloading
Product: [Eclipse Project] Platform Reporter: Jim des Rivieres <jeem>
Component: Update (deprecated - use Eclipse>Equinox>p2)Assignee: Dorian Birsan <birsan>
Status: RESOLVED FIXED QA Contact:
Severity: enhancement    
Priority: P4 CC: amanji, celek, jasper.chui.rh, manahan
Version: 2.1Keywords: plan
Target Milestone: 3.0   
Hardware: All   
OS: All   
Whiteboard:

Description Jim des Rivieres CLA 2003-05-15 11:25:20 EDT 
Improve update manager downloading. It is important that the update manager is 
scalable for large downloads. The update manager should download multiple 
feature and plug-in archive files in parallel to avoid single-socket 
bottlenecks, and should use restartable download technology for very large 
plug-in archives where possible. [Platform Update]
Comment 1 Dorian Birsan CLA 2003-07-14 11:44:10 EDT 
Once we move to jdk1.4 builds we can look at using the new java io package
(java.nio.*) for faster, asynchronous downloads.

Currently we are downloading plugins in parallel, by feature only. That is, 
features are downloaded sequentially, and within each feature, plugins are 
downloaded on multiple threads (5).

Withing the same eclipse session all the successfully downloaded 
features/plugins are cached, so if downloading fails half-way through, if the 
install process is restarted, downloading will resume from where it was left 
off.
This is only true at the feature/plugin granularity level. If a very large 
plugin has been partially downloaded before the download failure, then the 
plugin will be re-downloaded from the beginning.
Comment 2 Tim Koss CLA 2003-10-20 12:56:41 EDT 
proposed for 3.0 - JDK 1.4.1 dependency
Comment 3 Dorian Birsan CLA 2004-06-04 15:18:25 EDT 
3.0 Update provides restartable http downloads.
Parallel downloading turned out to not improve things in any significant way 
and has been dropped.

There is also support for mirroring remote sites locally (inside the 
enterprise) and have users update/install from the local network.