With presto deltarpms:
Found deltarpm update for firefox.i386 0:2.0.0.5-1.fc7
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Updating:
firefox i386 2.0.0.5-1.fc7 updates * 1.2 M
Transaction Summary
=============================================================================
Install 0 Package(s)
Update 1 Package(s)
Remove 0 Package(s)
Total download size: 1.2 M
Is this ok [y/N]: N
Without presto deltarpms:
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Updating:
firefox i386 2.0.0.5-1.fc7 updates 21 M
Transaction Summary
=============================================================================
Install 0 Package(s)
Update 1 Package(s)
Remove 0 Package(s)
Total download size: 21 M
Is this ok [y/N]:
The difference is noteworthy, 21 M vs 1.2 M, which is a big difference. Next the execution.
# time yum -y update firefox
Loading "presto" plugin
Setting up Update Process
Loading mirror speeds from cached hostfile
Setting up Presto
Reading Presto metadata in from local files
0 packages excluded due to repository priority protections
0 packages excluded due to repository protections
Resolving Dependencies
--> Running transaction check
---> Package firefox.i386 0:2.0.0.5-1.fc7 set to be updated
Found deltarpm update for firefox.i386 0:2.0.0.5-1.fc7
Dependencies Resolved
=============================================================================
Package Arch Version Repository Size
=============================================================================
Updating:
firefox i386 2.0.0.5-1.fc7 updates * 1.2 M
Transaction Summary
=============================================================================
Install 0 Package(s)
Update 1 Package(s)
Remove 0 Package(s)
Total download size: 1.2 M
Downloading Packages:
Downloading DeltaRPMs:
(1/1): firefox-2.0.0.4-2. 100% |=========================| 1.2 MB 00:06
Rebuilding rpms from deltarpms
Downloading RPMs:
Running rpm_check_debug
--> Populating transaction set with selected packages. Please wait.
---> Package firefox.i386 0:2.0.0.5-1.fc7 set to be updated
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Updating : firefox ######################### [1/2]
Cleanup : firefox ######################### [2/2]
Size of all updates downloaded from Presto-enabled repositories: 1.2M
Size of updates that would have been downloaded if Presto wasn't enabled: 21M
This is a savings of 95 percent
Updated: firefox.i386 0:2.0.0.5-1.fc7
Complete!
real 1m4.198s
user 0m33.223s
sys 0m3.302s
Please note that part of the time is used to rebuild the rpm from the deltarpm, and not from bandwidth consumption by downloading, so the time really depends on the computer's processing capabilities.
