diff options
Diffstat (limited to 'documentation/ref-manual')
| -rw-r--r-- | documentation/ref-manual/ref-classes.xml | 43 |
1 files changed, 22 insertions, 21 deletions
diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml index e2f1611..a03a68b 100644 --- a/documentation/ref-manual/ref-classes.xml +++ b/documentation/ref-manual/ref-classes.xml @@ -328,51 +328,52 @@ </para> <para> + If you take the optional step to set up a repository (package feed) + on the development host that can be used by Smart, you can + install packages from the feed while you are running the image + on the target (i.e. runtime installation of packages). + For information on how to set up this repository, see the + "<ulink url='&YOCTO_DOCS_DEV_URL;#setting-up-runtime-package-management'>Setting Up Runtime Package Management</ulink>" + in the Yocto Project Development Manual. + </para> + + <para> The package class you choose can affect build-time performance and has space ramifications. In general, building a package with IPK takes about thirty percent less time as compared to using RPM to build the same or similar package. - This comparison takes into account a complete build of the package with + This comparison takes into account a complete build of the package with all dependencies previously built. - The reason for this discrepancy is because the RPM package manager - creates and processes more - <ulink url='&YOCTO_DOCS_DEV_URL;#metadata'>Metadata</ulink> than the + The reason for this discrepancy is because the RPM package manager + creates and processes more + <ulink url='&YOCTO_DOCS_DEV_URL;#metadata'>Metadata</ulink> than the IPK package manager. Consequently, you might consider setting <filename>PACKAGE_CLASSES</filename> to "package_ipk" if you are building smaller systems. </para> <para> - Before making your decision on package manager, however, you should + Before making your decision on package manager, however, you should consider some further things about using RPM: <itemizedlist> <listitem><para> RPM starts to provide more abilities than IPK due to the fact that it processes more metadata. - For example, this information includes individual file types, - file checksum generation and evaluation on install, sparse file - support, conflict detection and resolution for Multilib systems, + For example, this information includes individual file types, + file checksum generation and evaluation on install, sparse file + support, conflict detection and resolution for Multilib systems, ACID style upgrade, and repackaging abilities for rollbacks. </para></listitem> <listitem><para> - For smaller systems, the extra space used for the Berkley - Database and the amount of metadata when using RPM can affect + For smaller systems, the extra space used for the Berkley + Database and the amount of metadata when using RPM can affect your ability to perform on-device upgrades. </para></listitem> - <listitem><para> - If you take the steps to set up a repository (package feed) - on the development host that can be used by Smart, you can - install packages from the feed while you are running the image - on the target (i.e. runtime installation of packages). - For information on how to set up this repository, see the - "<ulink url='&YOCTO_DOCS_DEV_URL;#setting-up-runtime-package-management'>Setting Up Runtime Package Management</ulink>" - in the Yocto Project Development Manual. - </para></listitem> - </itemizedlist> + </itemizedlist> </para> <para> - You can find additional information on the effects of the package + You can find additional information on the effects of the package class at these two Yocto Project mailing list links: <itemizedlist> <listitem><para><ulink url='&YOCTO_LISTS_URL;/pipermail/poky/2011-May/006362.html'> |
