Linked by Thom Holwerda on Fri 29th Jan 2010 16:08 UTC
Oracle and SUN "Several of the concerns about Oracle's acquisition of Sun have revolved around how Unix technologies led by Sun would continue under the new ownership. As it turns out, Solaris users might not have much to worry about, as Oracle executives on Wednesday affirmed their commitment to preserving the efforts. In the case of Solaris, Oracle had already been a big supporter of the rival Linux operating system. Oracle has its own Enterprise Linux offering, based on Red Hat Enterprise Linux. For Oracle CEO Larry Ellison, the idea that Linux and Solaris are mutually exclusive is a false choice."
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"Containers/Zones and LDOMs are good but can't compete with AIX's LPARs (or VMware ESX or even Xen). You have to do black magic to run RHEL or Solaris 8/9 using "Branded Zones"... that's not "high end", that's not "Enterprise"... that's a complete joke."

Branded Zones require Black Magic? Eh? You have never tried zones yourself. It is very easy to set Zones up. And Zones are extremely light weight also, as all Linux kernel calls get remapped to Solaris kernel calls. There is only one kernel active; the Solaris kernel. A Zone typically requires 40MB RAM and 100MB disk space (if you use ZFS). One guy started 1000 zones in 1GB RAM - it was dog slow, but it worked. Try to do that with AIX?

The point is, you just zip an old Solaris v8 server, and then drop that zip file into an Solaris 10 Zone, and now you can get rid of your old server.

You can also use LDOMS, which is Solaris equivalence to LPAR.

"ZFS and Dtrace are amazing, I love 'em, but They're pretty new technologies! You don't have ZFS in every Solaris box out there! (in fact VxVM and SVM are much more common). AIX have LVM since 1991 or so, and Linux since 1998."

LVM can not be compared to ZFS, it is ridiculous. ZFS is the only solution that REALLY protects your data, LVM does not.

IBM has a DTrace copy: ProbeVue. I wonder how good it is? And then IBM wants to have the ZFS copy: BTRFS.

Regarding "Linux is on Top500". Yes, we find Linux on Top500 but Top500 super computers are basically a bunch of PC on a fast network. They are very specialized and do one thing fast: calculate. They use stripped down and modified Linux kernel, not std Linux kernel. The difference between super computers and Big Iron (one big machine with lots of CPUs) are vast, see wikipedia article. Big Iron is hard to do, they are general multi purpose machines with lots of complex stuff. A bunch of PC sending messages and calculating is easy to do - it is almost like SETI Folding works: a bunch of computers do a calculation and sends back the result. It is very different to Big Iron where Solaris scales well - it is the same install CD and the same Solaris kernel on Asus EEE PC up to big iron with 100s of CPUs - that is true Scalability! You dont have to modify anything on Solaris kernel!

Why dont Super Computers use the Solaris kernel which scales much better on Big Iron? Solaris kernel is complex and difficult to modify and strip down, with some weird licensing (commercial stuff is ok?). It is far easier to use a naive kernel as Linux under GPL to modify.

Look at SAP latest benchmarks. Linux on 48 cores only utilize 87% of all cores, whereas Solaris utilize 99% of all cores. That means Linux does not scale on a single machine with many cores.

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