Changes between Version 6 and Version 7 of Development/YumAndSPMA

Timestamp:

Mar 29, 2013, 6:17:09 PM (13 years ago)

Author:

munoz

Comment:

--

Development/YumAndSPMA

@@ -81 +81 @@
 [[Image(deps.png)]]
 
-Both smithers and mrburns are specified directly in the profile.  But the distribution recalls that smithers depends on mrburns, so it adds a dependency. At the same time, we decide mrburns is not a critical part of our infrastructure, so we remove it from the profile:
+Both smithers and mrburns are specified directly in the profile.  But the distribution recalls that smithers depends on mrburns, so it adds a dependency. At the same time, we decide mrburns is not a critical part of our infrastructure, so we remove it from the profile.  This is what we'd like to see:
 
 [[Image(deps-updated.png)]]
@@ -112 +112 @@
 We'll start again:
 
+[[Image(deps.png)]]
+
 and distro-sync will leave our system:
 
-and we'll be happy!
+[[Image(deps-updated.png)]]
 
+Only now we may install new packages and remove old ones reliably, in a single transaction.
+
+=== Drawbacks ===
+
+1. `distro-sync` may introduce or update packages that will be removed immediately.  This is a small overhead, but I don't see the harm to the system.
+1. The next transaction may fail, leaving the system in an intermediate state.  It's possible to recover from this one using only Quattor, so I don't think we should worry too much about it.