thanks for all the answers Thread name: "Re: [OpenIndiana-discuss] from the lost to the river" Mail number: 6 Date: Tue, Oct 02, 2012 In reply to: Thorsten Heit <thorsten.h...@vkb.de> > > Hi, > > > > I still don't know what IPS really is.... > > > > "Image Packaging System" > > > > It's a software packaging scheme that was designed during the > > OpenSolaris days as a replacement for the old SysV packaging system. > > The big change is that it's based on a client/server model, where (at > > least in the first implementation) the server was a required part of the > > software upgrade mechanism. > > > > The old SysV packaging system had a disk format that delivered files, > > including scripts that ran at installation. IPS does not, and instead > > has a set of pre-determined actions that can be taken during upgrade or > > install of a file. The lack of scripting is an important improvement -- > > the old scripting mechanisms allowed software developers to deliver > > arbitrary horrors inside scripts, but the new system doesn't allow that. > > > > OpenSolaris (and OpenIndiana) still supports SysV packaging, but the > > main software, at least in the main line of code, is delivered via IPS. > > One big difference between IPS and the old SysV system: > > A SysV package is one huge file whereas packages delivered via IPS are > split into lots of single files; simplified said: one file on your disk > from a certain package ^= one file in IPS, cryptographically signed in the > IPS manifest and stored in compressed form on the IPS server. > > If you download a newer version of a SysV package, MySQL for example, you > normally have to suck the whole package, even when only a small part > inside the package was changed. IPS on the other hand will download only > the delta, i.e. those files that were changed. > > Additionally the IPS server doesn't really care about the architecture of > your system; it can store files for different CPU architectures and > operating systems in one single repository. GlassFish for example is using > this technique (*). > > > (*) https://blogs.oracle.com/alexismp/entry/java_ee_6_tutorial_and > > Just my 0.02$ ;-) > > HTH > > Thorsten > _______________________________________________ > OpenIndiana-discuss mailing list > OpenIndiana-discuss@openindiana.org > http://openindiana.org/mailman/listinfo/openindiana-discuss
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