Con 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
Sin 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]:
La diferencia es más que notable, 21 M vs 1.2 M, eso hace realmente una diferencia, ahora la ejecución.
# 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
Por favor note que parte del tiempo utilizado es por la reconstrucción del rpm a partir del deltarpm y no por consumo del ancho de banda descargando, así que ese tiempo realmente depende de la capacidad de procesamiento de la máquina.
