Why Oracle Linux. Hans Forbrich Forbrich Consulting Ltd. Why Oracle Linux

Transcription

1 Hans Forbrich Forbrich Consulting Ltd

2

3 Who am I Hans Forbrich Based in Alberta, Canada Principal consultant, Forbrich Consulting Group Programming since 1969 Oracle developer and DBA since 1984 (v4) Oracle Consulting Oracle and Oracle University Partner since 2003 Oracle consultant and trainer Oracle University Instructor of the Year 2010 Oracle ACE since 2006, ACE Director since 2008

4 Based in Alberta, Canada

5 Operating System Choices Current list of Commercial Enterprise Operating Systems Linux distros Red Hat, SUSE, Asian Linux, Oracle Linux Other distros Solaris HP-UX AIX Windows BSD and variants Which one to choose?

6 Oracle Kernel Oracle has created a layered and modular approach to the kernel Visible through x$ tables 'Top' layers represent client Successive layers provide services Bottom layer is interface to operating system

7 DB Kernel Layers Oracle Call Interface (OCI) User Program Interface (UPI) Oracle Program Interface (OPI)... Execution Layer (KX) Access Layer (KA)... Lock Manager (KT) Kernel Generic (KG) Operating System (S)

8 Oracle's Development Platform Primary development on Linux As much as possible, the service layers are developed on Linux except when a different process model is required Ports to other platforms Primary is the OS Service layer Adjustments to other layers for performance

9 Kernel Operating Model Oracle uses the Process + Shared Memory Model heavily Unix heritage Visible in Linux /sys and /proc

10 The So far Process model, Shared Memory model Development platform Make *nix, and Linux, a preferred choice

11 Kind of Linux is Free? No license fee for source Need skills Many distros Some come with commercial support Some come with strong community Some are not supported

12 glibc The GNU 'C' Library is the 'public' developers' API to the kernel and to the major utilities Compatibility with glibc is crucial Kernel Devices Application Oracle uses it heavily

13 Distros Stability in glibc is critical for enterprise and commercial operations Development and alpha distros change release in 4-10 months Commercial distros change release in months Companies need stability

14 Which distros Development, alpha and 'fun' distros OpenSUSE, Fedora Change too often for general business Commercial distros RedHat (+clones), Oracle Linux, SUSE, Asian Linux Stable, release cycle planned to be 18 months Technically free, but... 'vendor' support

15 Red Hat Powerful Commercial support available Excellent 'general purpose' enterprise Sometimes slow to test & release some fixes Can be tricky to get Need to pay support to get 'free' download Free clones WhiteBox, CentOS, Oracle Linux

16 Oracle Linux Originally Red Hat clone Oracle released 'Oracle specific fixes' Oracle has many Linux Kernel Maintainers btrfs, ocfs2, infiniband drivers, etc. ASM and ASMLib Freely downloadable Public YUM for updates

17 ASM, ASMlib ASM is the preferred cluster file system and volume manager for Oracle DB Resolves some problems Creates new problems because of RAW disk interactions ASMLib was a DEMO APP for vendors to get around the problems Kernel and glibc dependent

18 Oracle Linux UEK Oracle s kernel Oracle integrates ASMLib into kernel No recompile, pre-tested (Others decide not to do this) oracle-rdbms-server-11gr2-preinstall.rpm Available with Support OEM Cloud Control Integration Available with Premium Support Ksplice DTrace

19 ASM

20 KSplice Live kernel patch, no downtime Only with Oracle, or separate license

21 Documentation -> Oracle Linux

22 RHN / ULN Updates Subscribe to central out-of-firewall server Violates many customer rules Better to set up an internal YUM server RH has Satellite and Proxy servers Easy to configure Can be in DMZ Do not automate updates

23 Conclusion Even for learning, Oracle Linux is Free, and cheaper than 'community/fun' distros such as Fedora Easy to get (edelivery) Patchable (public-yum) Great for ASM learning For enterprise use Supported ASM and integrated ASMLib Monitored by Cloud Control (with support contract) 24x7 operations with Ksplice (with support contract)

24 Questions?

25 Thank You Hans Forbrich