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  • Migrating from one linux install to another: How to keep the second disk around?

    - by Jim Miller
    I've got a linux box running Fedora 19 that I want to move to CentOS 6.4. Rather than trying to do something fancy with the current disk (which has also accumulated a lot of sludge over the years), I'm going to get a new disk, put CentOS on that, and then move the to-be-preserved bits of stuff from the old disk to the new one. I haven't done this yet, but I presume it should be semi-straightforward -- do the CentOS install on the new disk, mount the old disk on /olddisk or somesuch, and start copying. However, I'm not sure how to handle getting the machine to recognize the new empty disk as the target of the CentOS install (I suppose I can just pull the old disk during the installation), remember that this is the intended boot disk once the install has happened), and tweak /etc/fstab (right?) to set up the old disk on the desired mount point. (Both disks are, or will be, SATA.) I could probably hack it together without losing too much hair or doing too much damage, but could anyone offer some advice that would get/keep me on the right track? Thanks!

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  • How to Dual-Boot Kali-Linux and Windows 8.1?

    - by Ceyhun
    I have Acer V3-772G 1 TB Harddisk. I shrinked my biggest partition in order to install Kali Linux. When installing Kali, GRUB couldn't detect windows 8 so I kept going on(I installed grub as my masterboot). After installed Kali there was no way to boot Windows 8.1, but booting Kali was OK with GRUB in legacy-BIOS. When I tried to change bios to UEFI it couldn't find any OS (took too much time, nearly 1 hour). So I tried to update GRUB with boot-repair within a Ubuntu Live USB. But after updating GRUB I terrified, in UEFI and Legacy mode grub couldn't find ANY OS (Both Kali and Windows) so I have no option other than using Ubuntu Live. I tried every possible options but nothing has worked for me. I tried rEFInd in UEFI mode it worked only for Kali. I still cannot boot my windows 8.1 . I considered to restore to factory setting with a Windows Rescue USB but kept telling me "No driver found". Please help me to dual boot or remove Kali and restore my Windows 8.1

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  • What to do after a fresh Linux install in a production server?

    - by Rhyuk
    I havent had previous experience with the 'serious' IT scene. At work I've been handed a server that will host an application and MYSQL (I will install and configure everything), this will be a productive server. Soon I will be installing RHEL5 to it but I would like to know like, if you get a new production server, what would be the first 5 things you would do after you do a fresh Linux install? (configuration/security/reliability wise) EDIT: Added more information regarding the server enviroment and server roles: -The server will be inside my company's intranet/firewall. -The server will receive files (GBs) in binary code from another internal server. The application installed in this server is in charge of "translating" all that binary into human readable input. Server will get queried to get this information. -Only 2-3(max) users will be logging in. -(2) 145GB HDs in RAID1 for the OS and (2) 600GB HDs in RAID1 also for data. I mean, I know I may not get the perfect guideline. But at least something thats better than leaving everything on default.

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  • How do I speed up and cache mmap file access over NFS on Linux?

    - by Zan Lynx
    The server and client are both 64-bit Ubuntu 10.04 LTS. The application in question is a custom app that uses mmap() for fast random file access. Its ideal state is when the entire file is cached in RAM. The network connections are really fast 10Gb Ethernet. It is a virtual server blade setup. It isn't the network connections slowing things down because everything performs superbly when using a virtual disk (iSCSI to the SAN). But when we run the application on a NFS home directory mount, performance goes to the dogs. It appears that the Linux kernel isn't caching anything. So it is reading every single disk block needed by mmap() accesses over and over and over again. The NFS mount is done through autofs, which has only default settings. /proc/mounts shows the NFS mount is done with the following options: rw,relatime,vers=3,rsize=131072,wsize=131072,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=192.168.11.52,mountvers=3,mountproto=tcp,addr=192.168.11.52 How can I make Ubuntu 10.04 cache the file instead of reloading it all the time?

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  • Should I update the kernel on a Linux machine?

    - by Legate
    As I understand it, updating to a new kernel (with the normal linux-image... package, not by rolling my own) requires a server restart. However, one of our servers (Ubuntu 10.04) is running several extensive screen sessions. Restarting kills those which is always a major hassle to their owners (mostly because of lost session histories). What should I do? I see several possibilites: Not doing anything, that is update only non-kernel packages (perhaps use apt-pinning?) Update the kernel, but not restart. (Is that smart? I seem to remember there might be some problems with loading kernel modules.) Updating the kernel and restarting. Is there perhaps some way to preserve the screen sessions? I guess it ultimately boils down to this question: How important is it to update the kernel? I posted this question here instead of askubuntu.com as I think this is not an Ubuntu-specific issue though this server is running Ubuntu.

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  • What's the proper way to prepare chroot to recover a broken Linux installation?

    - by ~quack
    This question relates to questions that are asked often. The procedure is frequently mentioned or linked to offsite, but is not often clearly and correctly stated. In an objective to concentrate useful information in one place, this question seeks to provide a clear, correct reference for this procedure. What are the proper steps to prepare a chroot environment for a recovery procedure? In many situations, repairing a broken Linux installation is best done from within the installation. But if the system won't boot, how do you fix it from within? Let's assume you manage to boot into an alternate system. Once there, you need to access your broken installation in order to fix it. Many recovery How-Tos recommend using chroot in order to run programs as if you are actually booted into the broken installation. What is the basic procedure? Are there accepted best-practices to follow? What variables need to be considered in order to adapt the basic preparation steps to a particular recovery task? As this is Community Wiki, feel free to edit this question to improve it as well.

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  • Should I completely turn off swap for linux webserver?

    - by Poma
    Recently my friend told me that it is a good idea to turn off swap on linux webservers with enough memory. My server has 12 GB and currently uses 4GB (not counting cache and buffers) under peak load. His argument was that in a normal situation server will never use all of its RAM so the only way it can encounter OutOfMemory situation is due to some bug/ddos/etc. So in case swap is turned off system will run out of memory that will eventually crash the program hogging memory (most likely the web server process) and probably some other processes. In case swap is turned on it will eat both RAM and swap and eventually will result in the same crash, but before that it will offload crucial processes like sshd to swap and start to do a lot of swap operations resulting in major slowdown. This way when under ddos system may go into a completely unusable condition due to huge lags and I probably will not be unable to log in and kill webserver process or deny all incoming traffic (all but ssh). Is this right? Am I missing something (like the fact that swap partition is very useful in some way even if I have enough RAM)? Should I turn it off?

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  • Yay! Oracle Solaris 11.1 Is Here!

    - by rickramsey
    Even the critters are happy. This is no cosmetic release. It's got TONS of new stuff for both system admins and system developers. In the coming weeks and months I'll highlight specific new capabilities, but for now, here are a few resources to get you started. What's New (pdf) Describes enhancements for sysadmins in: Installation System configuration Virtualization Security and Compliance Networking Data management Kernel/platform support Network drivers User environment And for system developers: Preflight Applications Checker Oracle ExaStack Labs (available to Oracle Partner Network Gold-level members for application certification) Oracle Solaris Studio Integrated Java Virtual Machine (JVM): Updates are now managed using the Image Packaging System (IPS) Migration guides and technology mapping tables for AIX, HP-UX and Red Hat Linux: Download Free downloads for SPARC and x86 are available, along with instructions and tips for using the new repositories and Image Packaging System. Tech Article: How to Upgrade to Oracle Solaris 11.1 You can upgrade using either Oracle's official Solaris release repository or, if you have a support contract, the Support repository. Peter Dennis explains how. Documentation Superbly written instructions from our dedicated cadre of world-renowned but woefully underpaid technical writers: Getting Started Installing, Booting, and Updating Establishing an Oracle Solaris Network Administering Essential Features Administering Network Services Securing the Operating System Monitoring and Tuning Creating and Using Virtual Environments Working with the Desktop Developing Applications Reference Manuals And more Training And don't forget the new online training courses from Oracle University! I really liked them. Here are my first and second impressions. Website Newsletter Facebook Twitter

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  • WebCenter Marketing and Upcoming Events

    - by rituchhibber
    Events: Events: Date Event Name Location/Country October 30, 2012 ResCare Solves Content Lifecycle Challenges with Oracle WebCenter Webcast November 1, 2012 Paper Burying Your HR Processes? Dig Your Way Out With Oracle WebCenter! Webcast November 15, 2012 Social Business Thought Leader Webcast: Three Ways to Fix Your Broken Organization, featuring Christian Finn Webcast Marketing: Marketing: WebCenter Sites Sales eVite:Embrace the Base: Create an Exceptional Online Customer Experience with Oracle WebCenter Sites Directs recipients to the Connected Customer Experience Resource Center to see the latest demos, analyst reports, and customer webcasts promoting WebCenter Sites. For more information Click  here. WebCenter Social Business Thought Leaders Series: Digital Darwinism: How Brands Can Survive the Rapid Evolution of Society and TechnologyBrian Solis, Altimeter Group digital analyst and futuristDecember 13, 2012 10am PDTRegistration available soon, find other content from this speaker here. Webcast: WebCenter Sites for Applications: Disconnected Online Customer Experience? Connect it with Oracle WebCenter November 8, 2012  eVite | Registration Page WebCenter in Action Customer & Partner webcast series: Started earlier in FY13, a new webcast series featuring WebCenter customer deployments that are executed by a partner.The next webcast in the series will be November 14th:Los Angeles Department of Building & Safety Lowers Customer Service Costs with Oracle WebCenter Click here to learn more. OnDemand Webcast: ResCare Solves Content Lifecycle Challenges with Oracle WebCenterComplex documents must be created, assembled, reviewed, and tracked. To avoid fragmented, chaotic information processes, organizations must adopt an integrated set of strategies, standards, best practices, and technologies for managing information. Attend this webcast to learn how Oracle WebCenter has allowed ResCare to: solve content lifecycle challenges, reduce compliance and business risks and increase adoption of intranet as primary business communication tool. On-Demand Assets Date Event Name Location/Country On Demand Avoid Social Media Fatigue - Learn the 9 C’s of Customer Engagement, featuring Ray Wang, Principal Analyst and CEO, Constellation Research Webcast On Demand WebCenter in Action Series: Hitachi Data Systems Improves Global Web Experience with Oracle WebCenter, presented by Hitachi Data Systems and Lingotek. Webcast On Demand Managing Social Relationships for the Enterprise, featuring Jeremiah Owyang, Industry Analyst, Altimeter Group and Reggie Bradford, Vice President, Oracle Webcast On Demand Oracle’s Vision for the Social-Enabled Enterprise, presented by Mark Hurd, Thomas Kurian and Reggie Bradford Webcast On Demand WebCenter in Action Series: Qualcomm Provides a Seamless Experience for Customers with Oracle WebCenter, presented by Qualcomm and Keste. Webcast On Demand Social Business Thought Leaders Series: 6 Counterintuitive Best Practices for Social Collaboration Adoption, featuring John Brunswick, Oracle. Webcast On Demand Oracle WebCenter Connects Patients and Researchers in Cancer Control Mission, presented by Canadian Partnership Against Cancer and App-Systems Webcast On Demand Oracle WebCenter: Modernize, Aggregate and Extend Your Portals Webcast On Demand Top 10 Technology Trends Driving Business Innovation, featuring Andy Mulholland, CTO, Capgemini Webcast On Demand Ancestry.com Helps Families Uncover History with Oracl e WebCenter Webcast On Demand Organic Business Networks: Doing Business in a Hyper-Connected World, featuring Mike Fauscette, GVP, IDC Webcast On Demand Social Business and Innovation, featuring John Mancini, President, AIIM Webcast On Demand Do More with Oracle WebCenter: Expand Beyond Web Experience Management Webcast On Demand Race Against the Machine, featuring Andrew McAfee, author and principal scientist at MIT Webcast On Demand Introducing Oracle WebCenter Sites 11gR1: Transforming the Online Experience Webcast On Demand Mobile is the New Face of Engagement, featuring Ted Schadler, Vice President & Principal Analyst, Forrester Research Inc Webcast Analyst Report: IDC Research: Oracle Debuts New Release of Oracle WebCenter Sites.

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  • Az Oracle üzleti intelligencia csomag Windows Server 2008-on is, a kliens Vista op.rsz-en is

    - by Fekete Zoltán
    Tegnap az Oracle BI Hands On rendezvényen felmerült a kérdés, hogy az Oracle Business Intelligence Enterprise Editon fut-e Windows Server 2008-on. A válasz: IGEN. Az Oracle BI EE fut a Windows Server 2008-on. Emellett a másik kérdésre a válasz: IGEN, a kliens lehet Windows Vista is. Mivel az Oracle BI szerver szoftver, amit egy böngészovel érnek el a felhasználók elemzési, lekérdezés/jelentés/riport- készítési feladatok elvégzésére, ezért az Oracle BI csak szerver operációs rendszerekre van bevizsgálva: Linux, Solaris, HP-UX, AIX és Windows platformokon. A jelenleg támogatott operációs rendszerek: Microsoft Windows 2000/2003 Server; Microsoft Windows Server 2008 Enterprise Edition x86 32 bit2 - Red Hat Enterprise Linux AS 4.x; Red Hat Enterprise Linux Server/Advanced Platform 5 - Novell SUSE 9.x - Oracle Enterprise Linux 4; Oracle Enterprise Linux 5 - Sun Solaris 9 SPARC 32 bit ; Sun Solaris 9 SPARC 64 bit; Sun Solaris 10 SPARC 32 bit; Sun Solaris 10 SPARC 64 bit - AIX 5.2 PowerPC 32 bit; AIX 5.2 PowerPC 64 bit; AIX 5.3 PowerPC 32 bit; AIX 5.3 PowerPC 64 bit; AIX 6.1 PowerPC 32 bit; AIX 6.1 PowerPC 64 bit - HP-UX 11.11 PA-RISC 64 bit; HP-UX 11.23 PA-RISC 64 bit; HP-UX 11.23 Itanium 64 bit; HP-UX 11.31 Itanium 64 bit A böngészos hozzáférést az irányítópultokhoz (dashboard), interaktív elemzo munkához használható operációs rendszerek: Windows, Vista, Linux, Solaris, Apple Mac OS 10.x.

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  • From Oracle PL/SQL Developer to Java programmer - Is it a good decision? [on hold]

    - by user3554231
    I will explain my question in simple words. I have little over 1 year experience in Oracle. My dream is to be "called" as a 'Developer', be it database developer if not software developer. But right now I don't develop anything neither I am in good touch with PL/SQL and other Oracle Utilites like SQL*LOADER, shell scripting and stuff like that as I am only a System Analyst where I analyze and configure database using SQL queries. To be honest, I know very basic PL/SQL and good knowledge in SQL but that won't ever give me a chance to be a developer as I am lagging way behind the "real" developers knowledge. Now I feel I should learn JAVA as well so that I can cope up with the competition. But I am too scared to learn new things as it will take much more time which will indirectly increase my useless work experince(just analyzing) which values nothing in todays market. Moreover that, I am too lazy to work hard i.e. to study and not to work during office hours. To sum it up I am lazy and confused and scared but I want to learn things as well but don't know if I am intelligent enough to learn whole of PL/SQL or to master any other language. Is there any other way from which I can feel confident? Actually I even feel sometimes that after 2-3 years if I still don't achieve my goal, I won't ever be able to reach my destination. I just want to live my dream of being a developer. Give me some tips and hopes but not false hopes.

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  • No module named sqlalchemy when installing ckanext-viewhelpers

    - by kean23
    I'm using CKAN as my open data portal and am trying to install the ckanext-viewhelpers Extension by following the instructions at https://github.com/ckan/ckanext-viewhelpers. /usr/lib/ckan/default/src/ckanext-viewhelpers-master$ sudo python setup.py installChecking .pth file support in /usr/local/lib/python2.7/dist-packages/ /usr/bin/python -E -c pass TEST PASSED: /usr/local/lib/python2.7/dist-packages/ appears to support .pth files running bdist_egg running egg_info writing ckanext_viewhelpers.egg-info/PKG-INFO writing namespace_packages to ckanext_viewhelpers.egg-info/namespace_packages.txt writing top-level names to ckanext_viewhelpers.egg-info/top_level.txt writing dependency_links to ckanext_viewhelpers.egg-info/dependency_links.txt writing entry points to ckanext_viewhelpers.egg-info/entry_points.txt reading manifest file 'ckanext_viewhelpers.egg-info/SOURCES.txt' reading manifest template 'MANIFEST.in' writing manifest file 'ckanext_viewhelpers.egg-info/SOURCES.txt' installing library code to build/bdist.linux-x86_64/egg running install_lib running build_py creating build/bdist.linux-x86_64/egg creating build/bdist.linux-x86_64/egg/ckanext copying build/lib.linux-x86_64-2.7/ckanext/__init__.py -> build/bdist.linux-x86_64/egg/ckanext creating build/bdist.linux-x86_64/egg/ckanext/viewhelpers copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/plugin.py -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/__init__.py -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers creating build/bdist.linux-x86_64/egg/ckanext/viewhelpers/tests copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/tests/__init__.py -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers/tests copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/tests/test_view.py -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers/tests creating build/bdist.linux-x86_64/egg/ckanext/viewhelpers/public creating build/bdist.linux-x86_64/egg/ckanext/viewhelpers/public/vendor copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/public/vendor/queryStringToJSON.js -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers/public/vendor copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/public/resource.config -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers/public copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/public/filters_form.css -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers/public copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/public/filters.js -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers/public copying build/lib.linux-x86_64-2.7/ckanext/viewhelpers/public/filters_form.js -> build/bdist.linux-x86_64/egg/ckanext/viewhelpers/public byte-compiling build/bdist.linux-x86_64/egg/ckanext/__init__.py to __init__.pyc byte-compiling build/bdist.linux-x86_64/egg/ckanext/viewhelpers/plugin.py to plugin.pyc byte-compiling build/bdist.linux-x86_64/egg/ckanext/viewhelpers/__init__.py to __init__.pyc byte-compiling build/bdist.linux-x86_64/egg/ckanext/viewhelpers/tests/__init__.py to __init__.pyc byte-compiling build/bdist.linux-x86_64/egg/ckanext/viewhelpers/tests/test_view.py to test_view.pyc creating build/bdist.linux-x86_64/egg/EGG-INFO copying ckanext_viewhelpers.egg-info/PKG-INFO -> build/bdist.linux-x86_64/egg/EGG-INFO copying ckanext_viewhelpers.egg-info/SOURCES.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying ckanext_viewhelpers.egg-info/dependency_links.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying ckanext_viewhelpers.egg-info/entry_points.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying ckanext_viewhelpers.egg-info/namespace_packages.txt -> build/bdist.linux-x86_64/egg/EGG-INFO copying ckanext_viewhelpers.egg-info/not-zip-safe -> build/bdist.linux-x86_64/egg/EGG-INFO copying ckanext_viewhelpers.egg-info/top_level.txt -> build/bdist.linux-x86_64/egg/EGG-INFO creating 'dist/ckanext_viewhelpers-0.1-py2.7.egg' and adding 'build/bdist.linux-x86_64/egg' to it removing 'build/bdist.linux-x86_64/egg' (and everything under it) Processing ckanext_viewhelpers-0.1-py2.7.egg removing '/usr/local/lib/python2.7/dist-packages/ckanext_viewhelpers-0.1-py2.7.egg' (and everything under it) creating /usr/local/lib/python2.7/dist-packages/ckanext_viewhelpers-0.1-py2.7.egg Extracting ckanext_viewhelpers-0.1-py2.7.egg to /usr/local/lib/python2.7/dist-packages ckanext-viewhelpers 0.1 is already the active version in easy-install.pth Installed /usr/local/lib/python2.7/dist-packages/ckanext_viewhelpers-0.1-py2.7.egg Processing dependencies for ckanext-viewhelpers==0.1 Finished processing dependencies for ckanext-viewhelpers==0.1 However I am faced with this error which I could not solve after adding viewhelpers in my CKAN config file. paster serve /etc/ckan/default/development.ini Traceback (most recent call last): File "/usr/bin/paster", line 4, in <module> command.run() File "/usr/lib/python2.7/dist-packages/paste/script/command.py", line 104, in run invoke(command, command_name, options, args[1:]) File "/usr/lib/python2.7/dist-packages/paste/script/command.py", line 143, in invoke exit_code = runner.run(args) File "/usr/lib/python2.7/dist-packages/paste/script/command.py", line 238, in run result = self.command() File "/usr/lib/python2.7/dist-packages/paste/script/serve.py", line 284, in command relative_to=base, global_conf=vars) File "/usr/lib/python2.7/dist-packages/paste/script/serve.py", line 321, in loadapp **kw) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 247, in loadapp return loadobj(APP, uri, name=name, **kw) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 271, in loadobj global_conf=global_conf) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 296, in loadcontext global_conf=global_conf) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 320, in _loadconfig return loader.get_context(object_type, name, global_conf) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 454, in get_context section) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 476, in _context_from_use object_type, name=use, global_conf=global_conf) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 406, in get_context global_conf=global_conf) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 296, in loadcontext global_conf=global_conf) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 328, in _loadegg return loader.get_context(object_type, name, global_conf) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 620, in get_context object_type, name=name) File "/usr/lib/python2.7/dist-packages/paste/deploy/loadwsgi.py", line 646, in find_egg_entry_point possible.append((entry.load(), protocol, entry.name)) File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1989, in load entry = __import__(self.module_name, globals(),globals(), ['__name__']) File "/usr/lib/ckan/default/src/ckan/ckan/config/middleware.py", line 9, in <module> import sqlalchemy as sa ImportError: No module named sqlalchemyckanext-viewhelpers

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  • Basics of Join Predicate Pushdown in Oracle

    - by Maria Colgan
    Happy New Year to all of our readers! We hope you all had a great holiday season. We start the new year by continuing our series on Optimizer transformations. This time it is the turn of Predicate Pushdown. I would like to thank Rafi Ahmed for the content of this blog.Normally, a view cannot be joined with an index-based nested loop (i.e., index access) join, since a view, in contrast with a base table, does not have an index defined on it. A view can only be joined with other tables using three methods: hash, nested loop, and sort-merge joins. Introduction The join predicate pushdown (JPPD) transformation allows a view to be joined with index-based nested-loop join method, which may provide a more optimal alternative. In the join predicate pushdown transformation, the view remains a separate query block, but it contains the join predicate, which is pushed down from its containing query block into the view. The view thus becomes correlated and must be evaluated for each row of the outer query block. These pushed-down join predicates, once inside the view, open up new index access paths on the base tables inside the view; this allows the view to be joined with index-based nested-loop join method, thereby enabling the optimizer to select an efficient execution plan. The join predicate pushdown transformation is not always optimal. The join predicate pushed-down view becomes correlated and it must be evaluated for each outer row; if there is a large number of outer rows, the cost of evaluating the view multiple times may make the nested-loop join suboptimal, and therefore joining the view with hash or sort-merge join method may be more efficient. The decision whether to push down join predicates into a view is determined by evaluating the costs of the outer query with and without the join predicate pushdown transformation under Oracle's cost-based query transformation framework. The join predicate pushdown transformation applies to both non-mergeable views and mergeable views and to pre-defined and inline views as well as to views generated internally by the optimizer during various transformations. The following shows the types of views on which join predicate pushdown is currently supported. UNION ALL/UNION view Outer-joined view Anti-joined view Semi-joined view DISTINCT view GROUP-BY view Examples Consider query A, which has an outer-joined view V. The view cannot be merged, as it contains two tables, and the join between these two tables must be performed before the join between the view and the outer table T4. A: SELECT T4.unique1, V.unique3 FROM T_4K T4,            (SELECT T10.unique3, T10.hundred, T10.ten             FROM T_5K T5, T_10K T10             WHERE T5.unique3 = T10.unique3) VWHERE T4.unique3 = V.hundred(+) AND       T4.ten = V.ten(+) AND       T4.thousand = 5; The following shows the non-default plan for query A generated by disabling join predicate pushdown. When query A undergoes join predicate pushdown, it yields query B. Note that query B is expressed in a non-standard SQL and shows an internal representation of the query. B: SELECT T4.unique1, V.unique3 FROM T_4K T4,           (SELECT T10.unique3, T10.hundred, T10.ten             FROM T_5K T5, T_10K T10             WHERE T5.unique3 = T10.unique3             AND T4.unique3 = V.hundred(+)             AND T4.ten = V.ten(+)) V WHERE T4.thousand = 5; The execution plan for query B is shown below. In the execution plan BX, note the keyword 'VIEW PUSHED PREDICATE' indicates that the view has undergone the join predicate pushdown transformation. The join predicates (shown here in red) have been moved into the view V; these join predicates open up index access paths thereby enabling index-based nested-loop join of the view. With join predicate pushdown, the cost of query A has come down from 62 to 32.  As mentioned earlier, the join predicate pushdown transformation is cost-based, and a join predicate pushed-down plan is selected only when it reduces the overall cost. Consider another example of a query C, which contains a view with the UNION ALL set operator.C: SELECT R.unique1, V.unique3 FROM T_5K R,            (SELECT T1.unique3, T2.unique1+T1.unique1             FROM T_5K T1, T_10K T2             WHERE T1.unique1 = T2.unique1             UNION ALL             SELECT T1.unique3, T2.unique2             FROM G_4K T1, T_10K T2             WHERE T1.unique1 = T2.unique1) V WHERE R.unique3 = V.unique3 and R.thousand < 1; The execution plan of query C is shown below. In the above, 'VIEW UNION ALL PUSHED PREDICATE' indicates that the UNION ALL view has undergone the join predicate pushdown transformation. As can be seen, here the join predicate has been replicated and pushed inside every branch of the UNION ALL view. The join predicates (shown here in red) open up index access paths thereby enabling index-based nested loop join of the view. Consider query D as an example of join predicate pushdown into a distinct view. We have the following cardinalities of the tables involved in query D: Sales (1,016,271), Customers (50,000), and Costs (787,766).  D: SELECT C.cust_last_name, C.cust_city FROM customers C,            (SELECT DISTINCT S.cust_id             FROM sales S, costs CT             WHERE S.prod_id = CT.prod_id and CT.unit_price > 70) V WHERE C.cust_state_province = 'CA' and C.cust_id = V.cust_id; The execution plan of query D is shown below. As shown in XD, when query D undergoes join predicate pushdown transformation, the expensive DISTINCT operator is removed and the join is converted into a semi-join; this is possible, since all the SELECT list items of the view participate in an equi-join with the outer tables. Under similar conditions, when a group-by view undergoes join predicate pushdown transformation, the expensive group-by operator can also be removed. With the join predicate pushdown transformation, the elapsed time of query D came down from 63 seconds to 5 seconds. Since distinct and group-by views are mergeable views, the cost-based transformation framework also compares the cost of merging the view with that of join predicate pushdown in selecting the most optimal execution plan. Summary We have tried to illustrate the basic ideas behind join predicate pushdown on different types of views by showing example queries that are quite simple. Oracle can handle far more complex queries and other types of views not shown here in the examples. Again many thanks to Rafi Ahmed for the content of this blog post.

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  • SPARC T4-4 Beats 8-CPU IBM POWER7 on TPC-H @3000GB Benchmark

    - by Brian
    Oracle's SPARC T4-4 server delivered a world record TPC-H @3000GB benchmark result for systems with four processors. This result beats eight processor results from IBM (POWER7) and HP (x86). The SPARC T4-4 server also delivered better performance per core than these eight processor systems from IBM and HP. Comparisons below are based upon system to system comparisons, highlighting Oracle's complete software and hardware solution. This database world record result used Oracle's Sun Storage 2540-M2 arrays (rotating disk) connected to a SPARC T4-4 server running Oracle Solaris 11 and Oracle Database 11g Release 2 demonstrating the power of Oracle's integrated hardware and software solution. The SPARC T4-4 server based configuration achieved a TPC-H scale factor 3000 world record for four processor systems of 205,792 QphH@3000GB with price/performance of $4.10/QphH@3000GB. The SPARC T4-4 server with four SPARC T4 processors (total of 32 cores) is 7% faster than the IBM Power 780 server with eight POWER7 processors (total of 32 cores) on the TPC-H @3000GB benchmark. The SPARC T4-4 server is 36% better in price performance compared to the IBM Power 780 server on the TPC-H @3000GB Benchmark. The SPARC T4-4 server is 29% faster than the IBM Power 780 for data loading. The SPARC T4-4 server is up to 3.4 times faster than the IBM Power 780 server for the Refresh Function. The SPARC T4-4 server with four SPARC T4 processors is 27% faster than the HP ProLiant DL980 G7 server with eight x86 processors on the TPC-H @3000GB benchmark. The SPARC T4-4 server is 52% faster than the HP ProLiant DL980 G7 server for data loading. The SPARC T4-4 server is up to 3.2 times faster than the HP ProLiant DL980 G7 for the Refresh Function. The SPARC T4-4 server achieved a peak IO rate from the Oracle database of 17 GB/sec. This rate was independent of the storage used, as demonstrated by the TPC-H @3000TB benchmark which used twelve Sun Storage 2540-M2 arrays (rotating disk) and the TPC-H @1000TB benchmark which used four Sun Storage F5100 Flash Array devices (flash storage). [*] The SPARC T4-4 server showed linear scaling from TPC-H @1000GB to TPC-H @3000GB. This demonstrates that the SPARC T4-4 server can handle the increasingly larger databases required of DSS systems. [*] The SPARC T4-4 server benchmark results demonstrate a complete solution of building Decision Support Systems including data loading, business questions and refreshing data. Each phase usually has a time constraint and the SPARC T4-4 server shows superior performance during each phase. [*] The TPC believes that comparisons of results published with different scale factors are misleading and discourages such comparisons. Performance Landscape The table lists the leading TPC-H @3000GB results for non-clustered systems. TPC-H @3000GB, Non-Clustered Systems System Processor P/C/T – Memory Composite(QphH) $/perf($/QphH) Power(QppH) Throughput(QthH) Database Available SPARC Enterprise M9000 3.0 GHz SPARC64 VII+ 64/256/256 – 1024 GB 386,478.3 $18.19 316,835.8 471,428.6 Oracle 11g R2 09/22/11 SPARC T4-4 3.0 GHz SPARC T4 4/32/256 – 1024 GB 205,792.0 $4.10 190,325.1 222,515.9 Oracle 11g R2 05/31/12 SPARC Enterprise M9000 2.88 GHz SPARC64 VII 32/128/256 – 512 GB 198,907.5 $15.27 182,350.7 216,967.7 Oracle 11g R2 12/09/10 IBM Power 780 4.1 GHz POWER7 8/32/128 – 1024 GB 192,001.1 $6.37 210,368.4 175,237.4 Sybase 15.4 11/30/11 HP ProLiant DL980 G7 2.27 GHz Intel Xeon X7560 8/64/128 – 512 GB 162,601.7 $2.68 185,297.7 142,685.6 SQL Server 2008 10/13/10 P/C/T = Processors, Cores, Threads QphH = the Composite Metric (bigger is better) $/QphH = the Price/Performance metric in USD (smaller is better) QppH = the Power Numerical Quantity QthH = the Throughput Numerical Quantity The following table lists data load times and refresh function times during the power run. TPC-H @3000GB, Non-Clustered Systems Database Load & Database Refresh System Processor Data Loading(h:m:s) T4Advan RF1(sec) T4Advan RF2(sec) T4Advan SPARC T4-4 3.0 GHz SPARC T4 04:08:29 1.0x 67.1 1.0x 39.5 1.0x IBM Power 780 4.1 GHz POWER7 05:51:50 1.5x 147.3 2.2x 133.2 3.4x HP ProLiant DL980 G7 2.27 GHz Intel Xeon X7560 08:35:17 2.1x 173.0 2.6x 126.3 3.2x Data Loading = database load time RF1 = power test first refresh transaction RF2 = power test second refresh transaction T4 Advan = the ratio of time to T4 time Complete benchmark results found at the TPC benchmark website http://www.tpc.org. Configuration Summary and Results Hardware Configuration: SPARC T4-4 server 4 x SPARC T4 3.0 GHz processors (total of 32 cores, 128 threads) 1024 GB memory 8 x internal SAS (8 x 300 GB) disk drives External Storage: 12 x Sun Storage 2540-M2 array storage, each with 12 x 15K RPM 300 GB drives, 2 controllers, 2 GB cache Software Configuration: Oracle Solaris 11 11/11 Oracle Database 11g Release 2 Enterprise Edition Audited Results: Database Size: 3000 GB (Scale Factor 3000) TPC-H Composite: 205,792.0 QphH@3000GB Price/performance: $4.10/QphH@3000GB Available: 05/31/2012 Total 3 year Cost: $843,656 TPC-H Power: 190,325.1 TPC-H Throughput: 222,515.9 Database Load Time: 4:08:29 Benchmark Description The TPC-H benchmark is a performance benchmark established by the Transaction Processing Council (TPC) to demonstrate Data Warehousing/Decision Support Systems (DSS). TPC-H measurements are produced for customers to evaluate the performance of various DSS systems. These queries and updates are executed against a standard database under controlled conditions. Performance projections and comparisons between different TPC-H Database sizes (100GB, 300GB, 1000GB, 3000GB, 10000GB, 30000GB and 100000GB) are not allowed by the TPC. TPC-H is a data warehousing-oriented, non-industry-specific benchmark that consists of a large number of complex queries typical of decision support applications. It also includes some insert and delete activity that is intended to simulate loading and purging data from a warehouse. TPC-H measures the combined performance of a particular database manager on a specific computer system. The main performance metric reported by TPC-H is called the TPC-H Composite Query-per-Hour Performance Metric (QphH@SF, where SF is the number of GB of raw data, referred to as the scale factor). QphH@SF is intended to summarize the ability of the system to process queries in both single and multiple user modes. The benchmark requires reporting of price/performance, which is the ratio of the total HW/SW cost plus 3 years maintenance to the QphH. A secondary metric is the storage efficiency, which is the ratio of total configured disk space in GB to the scale factor. Key Points and Best Practices Twelve Sun Storage 2540-M2 arrays were used for the benchmark. Each Sun Storage 2540-M2 array contains 12 15K RPM drives and is connected to a single dual port 8Gb FC HBA using 2 ports. Each Sun Storage 2540-M2 array showed 1.5 GB/sec for sequential read operations and showed linear scaling, achieving 18 GB/sec with twelve Sun Storage 2540-M2 arrays. These were stand alone IO tests. The peak IO rate measured from the Oracle database was 17 GB/sec. Oracle Solaris 11 11/11 required very little system tuning. Some vendors try to make the point that storage ratios are of customer concern. However, storage ratio size has more to do with disk layout and the increasing capacities of disks – so this is not an important metric in which to compare systems. The SPARC T4-4 server and Oracle Solaris efficiently managed the system load of over one thousand Oracle Database parallel processes. Six Sun Storage 2540-M2 arrays were mirrored to another six Sun Storage 2540-M2 arrays on which all of the Oracle database files were placed. IO performance was high and balanced across all the arrays. The TPC-H Refresh Function (RF) simulates periodical refresh portion of Data Warehouse by adding new sales and deleting old sales data. Parallel DML (parallel insert and delete in this case) and database log performance are a key for this function and the SPARC T4-4 server outperformed both the IBM POWER7 server and HP ProLiant DL980 G7 server. (See the RF columns above.) See Also Transaction Processing Performance Council (TPC) Home Page Ideas International Benchmark Page SPARC T4-4 Server oracle.com OTN Oracle Solaris oracle.com OTN Oracle Database 11g Release 2 Enterprise Edition oracle.com OTN Sun Storage 2540-M2 Array oracle.com OTN Disclosure Statement TPC-H, QphH, $/QphH are trademarks of Transaction Processing Performance Council (TPC). For more information, see www.tpc.org. SPARC T4-4 205,792.0 QphH@3000GB, $4.10/QphH@3000GB, available 5/31/12, 4 processors, 32 cores, 256 threads; IBM Power 780 QphH@3000GB, 192,001.1 QphH@3000GB, $6.37/QphH@3000GB, available 11/30/11, 8 processors, 32 cores, 128 threads; HP ProLiant DL980 G7 162,601.7 QphH@3000GB, $2.68/QphH@3000GB available 10/13/10, 8 processors, 64 cores, 128 threads.

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  • 5 Best Practices - Laying the Foundation for WebCenter Projects

    - by Kellsey Ruppel
    Today’s guest post comes from Oracle WebCenter expert John Brunswick. John specializes in enterprise portal and content management solutions and actively contributes to the enterprise software business community and has authored a series of articles about optimal business involvement in portal, business process management and SOA development, examining ways of helping organizations move away from monolithic application development. We’re happy to have John join us today! Maximizing success with Oracle WebCenter portal requires a strategic understanding of Oracle WebCenter capabilities.  The following best practices enable the creation of portal solutions with minimal resource overhead, while offering the greatest flexibility for progressive elaboration. They are inherently project agnostic, enabling a strong foundation for future growth and an expedient return on your investment in the platform.  If you are able to embrace even only a few of these practices, you will materially improve your deployment capability with WebCenter. 1. Segment Duties Around 3Cs - Content, Collaboration and Contextual Data "Agility" is one of the most common business benefits touted by modern web platforms.  It sounds good - who doesn't want to be Agile, right?  How exactly IT organizations go about supplying agility to their business counterparts often lacks definition - hamstrung by ambiguity. Ultimately, businesses want to benefit from reduced development time to deliver a solution to a particular constituent, which is augmented by as much self-service as possible to develop and manage the solution directly. All done in the absence of direct IT involvement. With Oracle WebCenter's depth in the areas of content management, pallet of native collaborative services, enterprise mashup capability and delegated administration, it is very possible to execute on this business vision at a technical level. To realize the benefits of the platform depth we can think of Oracle WebCenter's segmentation of duties along the lines of the 3 Cs - Content, Collaboration and Contextual Data.  All three of which can have their foundations developed by IT, then provisioned to the business on a per role basis. Content – Oracle WebCenter benefits from an extremely mature content repository.  Work flow, audit, notification, office integration and conversion capabilities for documents (HTML & PDF) make this a haven for business users to take control of content within external and internal portals, custom applications and web sites.  When deploying WebCenter portal take time to think of areas in which IT can provide the "harness" for content to reside, then allow the business to manage any content items within the site, using the content foundation to ensure compliance with business rules and process.  This frees IT to work on more mission critical challenges and allows the business to respond in short order to emerging market needs. Collaboration – Native collaborative services and WebCenter spaces are a perfect match for business users who are looking to enable document sharing, discussions and social networking.  The ability to deploy the services is granular and on the basis of roles scoped to given areas of the system - much like the first C “content”.  This enables business analysts to design the roles required and IT to provision with peace of mind that users leveraging the collaborative services are only able to do so in explicitly designated areas of a site. Bottom line - business will not need to wait for IT, but cannot go outside of the scope that has been defined based on their roles. Contextual Data – Collaborative capabilities are most powerful when included within the context of business data.  The ability to supply business users with decision shaping data that they can include in various parts of a portal or portals, just as they would with content items, is one of the most powerful aspects of Oracle WebCenter.  Imagine a discussion about new store selection for a retail chain that re-purposes existing information from business intelligence services about various potential locations and or custom backend systems - presenting it directly in the context of the discussion.  If there are some data sources that are preexisting in your enterprise take a look at how they can be made into discrete offerings within the portal, then scoped to given business user roles for inclusion within collaborative activities. 2. Think Generically, Execute Specifically Constructs.  Anyone who has spent much time around me knows that I am obsessed with this word.  Why? Because Constructs offer immense power - more than APIs, Web Services or other technical capability. Constructs offer organizations the ability to leverage a platform's native characteristics to offer substantial business functionality - without writing code.  This concept becomes more powerful with the additional understanding of the concepts from the platform that an organization learns over time.  Let's take a look at an example of where an Oracle WebCenter construct can substantially reduce the time to get a subscription-based site out the door and into the hands of the end consumer. Imagine a site that allows members to subscribe to specific disciplines to access information and application data around that various discipline.  A space is a collection of secured pages within Oracle WebCenter.  Spaces are not only secured, but also default content stored within it to be scoped automatically to that space. Taking this a step further, Oracle WebCenter’s Activity Stream surfaces events, discussions and other activities that are scoped to the given user on the basis of their space affiliations.  In order to have a portal that would allow users to "subscribe" to information around various disciplines - spaces could be used out of the box to achieve this capability and without using any APIs or low level technical work to achieve this. 3. Make Governance Work for You Imagine driving down the street without the painted lines on the road.  The rules of the road are so ingrained in our minds, we often do not think about the process, but seemingly mundane lane markers are critical enablers. Lane markers allow us to travel at speeds that would be impossible if not for the agreed upon direction of flow. Additionally and more importantly, it allows people to act autonomously - going where they please at any given time. The return on the investment for mobility is high enough for people to buy into globally agreed up governance processes. In Oracle WebCenter we can use similar enablers to lane markers.  Our goal should be to enable the flow of information and provide end users with the ability to arrive at business solutions as needed, not on the basis of cumbersome processes that cannot meet the business needs in a timely fashion. How do we do this? Just as with "Segmentation of Duties" Oracle WebCenter technologies offer the opportunity to compartmentalize various business initiatives from each other within the system due to constructs and security that are available to use within the platform. For instance, when a WebCenter space is created, any content added within that space by default will be secured to that particular space and inherits meta data that is associated with a folder created for the space. Oracle WebCenter content uses meta data to support a broad range of rich ECM functionality and can automatically impart retention, workflow and other policies automatically on the basis of what has been defaulted for that space. Depending on your business needs, this paradigm will also extend to sub sections of a space, offering some interesting possibilities to enable automated management around content. An example may be press releases within a particular area of an extranet that require a five year retention period and need to the reviewed by marketing and legal before release.  The underlying content system will transparently take care of this process on the basis of the above rules, enabling peace of mind over unstructured data - which could otherwise become overwhelming. 4. Make Your First Project Your Second Imagine if Michael Phelps was competing in a swimming championship, but told right before his race that he had to use a brand new stroke.  There is no doubt that Michael is an outstanding swimmer, but chances are that he would like to have some time to get acquainted with the new stroke. New technologies should not be treated any differently.  Before jumping into the deep end it helps to take time to get to know the new approach - even though you may have been swimming thousands of times before. To quickly get a handle on Oracle WebCenter capabilities it can be helpful to deploy a sandbox for the team to use to share project documents, discussions and announcements in an effort to help the actual deployment get under way, while increasing everyone’s knowledge of the platform and its functionality that may be helpful down the road. Oracle Technology Network has made a pre-configured virtual machine available for download that can be a great starting point for this exercise. 5. Get to Know the Community If you are reading this blog post you have most certainly faced a software decision or challenge that was solved on the basis of a small piece of missing critical information - which took substantial research to discover.  Chances were also good that somewhere, someone had already come across this information and would have been excited to share it. There is no denying the power of passionate, connected users, sharing key tips around technology.  The Oracle WebCenter brand has a rich heritage that includes industry-leading technology and practitioners.  With the new Oracle WebCenter brand, opportunities to connect with these experts has become easier. Oracle WebCenter Blog Oracle Social Enterprise LinkedIn WebCenter Group Oracle WebCenter Twitter Oracle WebCenter Facebook Oracle User Groups Additionally, there are various Oracle WebCenter related blogs by an excellent grouping of services partners.

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  • How to Boot from iRAM Solid State Drive on Ubuntu

    - by quickshiftin
    I've got an iRAM solid state drive. I'd like to use this to store a linux root filesystem; the trouble is the device is not recognized as a hard drive to the BIOS. It only shows up if a live CD environment is loaded and the scsi drivers are available (may be other drivers needed as well). I've heard of Boot to Ram and wonder if some variation of that could work here and I could run a linux install off the iRAM??

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  • iproute2 not functioning ("RTNETLINK answers: Operation not supported")

    - by James Watt
    The command and error message: gtwy ~ # ip rule add from 64.251.23.186 table t1 RTNETLINK answers: Operation not supported Older article of the same problem, but it did not help me: http://forums.gentoo.org/viewtopic-t-696982-start-0-postdays-0-postorder-asc-highlight-.html I have looked on google at great lengths to try to find a solution. It seems that my kernel configuration is missing something? Any help or ideas would be appreciated. My system/kernel is: 2.6.36-gentoo-r5 #3 SMP Thu Jan 13 10:49:06 EST 2011 x86_64 Intel(R) Xeon(R) CPU X3220 @ 2.40GHz GenuineIntel GNU/Linux. I am posting this on SuperUser since this system is used as a workstation and this problem is unrelated to specific tasks that are handled exclusively by servers. iproute2 is installed: gtwy etc # emerge --search iproute2 Searching... [ Results for search key : iproute2 ] [ Applications found : 1 ] * sys-apps/iproute2 Latest version available: 2.6.35-r2 Latest version installed: 2.6.35-r2 Size of files: 378 kB Homepage: http://www.linuxfoundation.org/collaborate/workgroups/networking/iproute2 Description: kernel routing and traffic control utilities License: GPL-2 A small snippet of my kernel .config (view entire .config): gtwy linux # cat .config | grep NETLINK CONFIG_NETFILTER_NETLINK=y CONFIG_NETFILTER_NETLINK_QUEUE=y CONFIG_NETFILTER_NETLINK_LOG=y CONFIG_NF_CT_NETLINK=y CONFIG_SCSI_NETLINK=y gtwy linux # cat .config | grep IP_ADVANCED_ROUTER CONFIG_IP_ADVANCED_ROUTER=y gtwy linux # cat .config | grep INGRESS CONFIG_NET_SCH_INGRESS=y gtwy linux # cat .config | grep NET_SCHED CONFIG_NET_SCHED=y emerge --info Portage 2.1.9.25 (default/linux/amd64/10.0, gcc-4.1.2, glibc-2.10.1-r1, 2.6.36-gentoo-r5 x86_64) ================================================================= System uname: Linux-2.6.36-gentoo-r5-x86_64-Intel-R-_Xeon-R-_CPU_X3220_@_2.40GHz-with-gentoo-1.12.13 Timestamp of tree: Thu, 13 Jan 2011 01:15:01 +0000 app-shells/bash: 4.0_p37 dev-java/java-config: 1.3.7-r1, 2.1.10 dev-lang/python: 2.4.6, 2.5.4-r4, 2.6.5-r2, 3.1.2-r3 sys-apps/baselayout: 1.12.13 sys-apps/sandbox: 1.6-r2 sys-devel/autoconf: 2.13, 2.65 sys-devel/automake: 1.9.6-r2::<unknown repository>, 1.10.2, 1.11.1 sys-devel/binutils: 2.20.1-r1 sys-devel/gcc: 4.1.2, 4.3.4, 4.4.3-r2 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 2.2.6b sys-devel/make: 3.81 virtual/os-headers: 2.6.30-r1 (sys-kernel/linux-headers) ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /var/bind" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-march=nocona -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="assume-digests binpkg-logs distlocks fixlafiles fixpackages news parallel-fetch protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch" GENTOO_MIRRORS="http://gentoo.chem.wisc.edu/gentoo" LC_ALL="en_US.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="en" MAKEOPTS="-j5" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.namerica.gentoo.org/gentoo-portage" USE="acl amd64 apache2 berkdb bzip2 cli cracklib crypt ctype cups curl cxx dri fortran gdbm gpm iconv jpeg jpeg2k libwww mmx modules mudflap multilib mysql ncurses nls nptl nptlonly openmp pam pcre perl php png pppd python readline session sockets sse sse2 ssl symlink sysfs tcpd threads unicode vhosts xml xorg xsl zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga neomagic nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LANG, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

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  • Coherence Special Interest Group: First Meeting in Toronto and Upcoming Events in New York and Calif

    - by [email protected]
    The first meeting of the Toronto Coherence Special Interest Group (TOCSIG). Date: Friday, April 23, 2010 Time: 8:30am-12:00pm Where: Oracle Mississauga Office, Customer Visitation Center, 110 Matheson Blvd. West, Suite 100, Mississauga, ON L5R3P4 Cameron Purdy, Vice President of Development (Oracle), Patrick Peralta, Senior Software Engineer (Oracle), and Noah Arliss, Software Development Manager (Oracle) will be presenting. Further information about this event can be seen here   The New York Coherence SIG is hosting its seventh meeting. Date: Thursday, Apr 15, 2010 Time: 5:30pm-5:45pm ET social and 5:45pm-8:00pm ET presentations Where: Oracle Office, Room 30076, 520 Madison Avenue, 30th Floor, Patrick Peralta, Dr. Gene Gleyzer, and Craig Blitz from Oracle, will be presenting. Further information about this event can be seen here   The Bay Area Coherence SIG is hosting its fifth meeting. Date: Thursday, Apr 29, 2009 Time: 5:30pm-5:45pm PT social and 5:45pm-8:00pm PT presentations Where: Oracle Conference Center, 350 Oracle Parkway, Room 203, Redwood Shores, CA Tom Lubinski from SL Corp., Randy Stafford from the Oracle A-team, and Taylor Gautier from Grid Dynamics will be presenting Further information about this event can be seen here   Great news, aren't they? 

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  • Setting up a home server - what to use? (ZFS vs btrfs, BSD vs Linux, misc other requirements)

    - by monch1962
    I need to get all our home content off individual machines and onto a central server. What I'd like to have is the metaphorical "server under the stairs". Stuff we need: expandable storage. I want to be able to add extra disc as we go along, with minimal maintenance required. Currently we've got about 3Tb of files we need to host, and that's likely to grow by another Tb every 6-12 months based on recent history. I need to be able to add additional disc with minimal pain needs to store all the media (i.e. photos, video, music) we have, and run services to serve the various devices we have in the house to playback (e.g. DAAP so we can play stuff through iTunes, ccxstream so we can play stuff over XBMC). DAAP and ccxstream are needed now, but we also need to support new standards as they emerge (so a closed-box solution isn't going to work) RAID 5, or something broadly equivalent (e.g. RAID-Z) BitTorrent client ssh, NFS, Samba access snapshot capability (as in ZFS), so we can snapshot individual file systems regularly and rollback when my kids delete their school assignments the day before they're due... ability to recover quickly from power outages (it's not unusual for us to have power outages that last longer than our UPS' batteries) FOSS software a modern distributed version control system running on the box, such as Mercurial Stuff I'd like to have on the server, but can live without: PVR capability, so I could record TV to the box Web server. We currently run a small Web server on a very old box, and I'd ideally like to turn the old box off and move the content to the new server just to save some electricity Nagios + mrtg I've been looking at using a EEE Box as the server, primarily because I can get them cheap and they don't consume much power. The choice of OS and file system is more difficult, from what I've found: I've got most experience with various Linux distros, but am happy to use another Unix FreeBSD and OpenSolaris seem to be the best choices for hosting ZFS OpenSolaris' hardware support is nowhere near as good as e.g. Ubuntu btrfs, while looking very good, doesn't seem ready for prime-time yet ZFS doesn't let you (easily?) add new discs to a RAID5 or RAID-Z reading around, it seems that ZFS is a bit short of tools for recovering lost data At the moment, I'm leaning towards running FreeNAS+ZFS, but I'm concerned about the requirement to be able to add new disc on a fairly regular basis to an existing RAID-Z. Can anyone provide some recommendations, or share experiences? Thanks in advance

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  • Setting up a home server - what to use? (ZFS vs btrfs, BSD vs Linux, misc other requirements)

    - by monch1962
    I need to get all our home content off individual machines and onto a central server. What I'd like to have is the metaphorical "server under the stairs". Stuff we need: expandable storage. I want to be able to add extra disc as we go along, with minimal maintenance required. Currently we've got about 3Tb of files we need to host, and that's likely to grow by another Tb every 6-12 months based on recent history. I need to be able to add additional disc with minimal pain needs to store all the media (i.e. photos, video, music) we have, and run services to serve the various devices we have in the house to playback (e.g. DAAP so we can play stuff through iTunes, ccxstream so we can play stuff over XBMC). DAAP and ccxstream are needed now, but we also need to support new standards as they emerge (so a closed-box solution isn't going to work) RAID 5, or something broadly equivalent (e.g. RAID-Z) BitTorrent client ssh, NFS, Samba access snapshot capability (as in ZFS), so we can snapshot individual file systems regularly and rollback when my kids delete their school assignments the day before they're due... ability to recover quickly from power outages (it's not unusual for us to have power outages that last longer than our UPS' batteries) FOSS software a modern distributed version control system running on the box, such as Mercurial Stuff I'd like to have on the server, but can live without: PVR capability, so I could record TV to the box Web server. We currently run a small Web server on a very old box, and I'd ideally like to turn the old box off and move the content to the new server just to save some electricity Nagios + mrtg I've been looking at using a EEE Box as the server, primarily because I can get them cheap and they don't consume much power. The choice of OS and file system is more difficult, from what I've found: I've got most experience with various Linux distros, but am happy to use another Unix FreeBSD and OpenSolaris seem to be the best choices for hosting ZFS OpenSolaris' hardware support is nowhere near as good as e.g. Ubuntu btrfs, while looking very good, doesn't seem ready for prime-time yet ZFS doesn't let you (easily?) add new discs to a RAID5 or RAID-Z reading around, it seems that ZFS is a bit short of tools for recovering lost data At the moment, I'm leaning towards running FreeNAS+ZFS, but I'm concerned about the requirement to be able to add new disc on a fairly regular basis to an existing RAID-Z. Can anyone provide some recommendations, or share experiences? Thanks in advance

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  • Setting up a home server - what to use? (ZFS vs btrfs, BSD vs Linux, misc other requirements)

    - by monch1962
    I need to get all our home content off individual machines and onto a central server. What I'd like to have is the metaphorical "server under the stairs". Stuff we need: expandable storage. I want to be able to add extra disc as we go along, with minimal maintenance required. Currently we've got about 3Tb of files we need to host, and that's likely to grow by another Tb every 6-12 months based on recent history. I need to be able to add additional disc with minimal pain needs to store all the media (i.e. photos, video, music) we have, and run services to serve the various devices we have in the house to playback (e.g. DAAP so we can play stuff through iTunes, ccxstream so we can play stuff over XBMC). DAAP and ccxstream are needed now, but we also need to support new standards as they emerge (so a closed-box solution isn't going to work) RAID 5, or something broadly equivalent (e.g. RAID-Z) BitTorrent client ssh, NFS, Samba access snapshot capability (as in ZFS), so we can snapshot individual file systems regularly and rollback when my kids delete their school assignments the day before they're due... ability to recover quickly from power outages (it's not unusual for us to have power outages that last longer than our UPS' batteries) FOSS software a modern distributed version control system running on the box, such as Mercurial Stuff I'd like to have on the server, but can live without: PVR capability, so I could record TV to the box Web server. We currently run a small Web server on a very old box, and I'd ideally like to turn the old box off and move the content to the new server just to save some electricity Nagios + mrtg I've been looking at using a EEE Box as the server, primarily because I can get them cheap and they don't consume much power. The choice of OS and file system is more difficult, from what I've found: I've got most experience with various Linux distros, but am happy to use another Unix FreeBSD and OpenSolaris seem to be the best choices for hosting ZFS OpenSolaris' hardware support is nowhere near as good as e.g. Ubuntu btrfs, while looking very good, doesn't seem ready for prime-time yet ZFS doesn't let you (easily?) add new discs to a RAID5 or RAID-Z reading around, it seems that ZFS is a bit short of tools for recovering lost data At the moment, I'm leaning towards running FreeNAS+ZFS, but I'm concerned about the requirement to be able to add new disc on a fairly regular basis to an existing RAID-Z. Can anyone provide some recommendations, or share experiences? Thanks in advance

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  • SPARC Solaris Momentum

    - by Mike Mulkey-Oracle
    Following up on the Oracle Solaris 11.2 launch on April 29th, if you were able to watch the launch event, you saw Mark Hurd state that Oracle will be No. 1 in high-end computing systems "in a reasonable time frame”.  "This is not a 3-year vision," he continued.Well, According to IDC's latest 1QCY14 Tracker, Oracle has regained the #1 UNIX Shipments Marketshare! You can see the report and read about it here: Oracle regains the #1 UNIX Shipments Marketshare, but suffice to say that SPARC Solaris is making strong gains on the competition.  If you have seen the public roadmap through 2019 of Oracle's commitment to continue to deliver on this technology, you can see that Mark Hurd’s comment was not to be taken lightly.  We feel the systems tide turning in Oracle's direction and are working hard to show our partner community the value of being a part of the SPARC Solaris momentum.We are now planning for the Solaris 11.2 GA in late summer (11.2 beta is available now), as well as doing early preparations for Oracle OpenWorld 2014 on September 28th.  Stay tuned there!Here is a sampling of the coverage highlights around the Oracle Solaris 11.2 launch:“Solaris is still one of the most advanced platforms in the enterprise.” – ITBusinessEdge“Oracle is serious about clouds now, just as its customers are, whether they are building them in their own datacenters or planning to use public clouds.” – EnterpriseTech"Solaris is more about a layer of an integrated system than an operating system.” — ZDNet

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  • Use an audio/video file from a Linux laptop via USB to be played by Magic Sing ET-23H

    - by AisIceEyes
    I am one of the technical directors of a regular karaoke contest event. For the karaoke contest itself, due to tight budget, we are using what one of the sponsors are providing - Magic Sing ET-23H . The video output of the Magic Sing ET-23H are broadcasted at two big screens that are being shown to the audience and event attendees. When a karaoke contestant provides his / her karaoke video, the video itself is in a readable USB flashdrive and is attached to the USB input of Magic Sing ET-23H. What really bugs me is that the interface of Magic Sing ET-23H are also being broadcasted at the big screen video feeds. The interface of choosing the video file is being seen in the Magic Sing ET-23H - also to the big video screens that are seen by the audience and event goers. I will post in the comments ( if my less than 10 reputation would allow me) the picture of Magic Sing ET-23KH USB input of the device. I always bring my laptop, Acer AS5742-7653, during the regular karaoke event. I'm using my laptop also for tallying of scores from the judges, and also playing audio files from contestants that did not provide a karaoke video. I personally am using different Linux distros, but I next to all the time use my Ubuntu Studio 12.04.3 64bit partition during the regular karaoke contest event. My question is this: Is there a way I can share a temporary video/audio file directly from the laptop I'm using, going to the Magic Sing ET-23H that can broadcast both the video/audio file? Just like how in Window's Avisynth AVS files, or VirtualDub's temporary avi file, or like using ffplay (of ffmpeg), etc. I have researched somewhat the matter and found links in SuperUser.com. Though I can only provide the links at the comments section of this post if my reputation of less than 10 would allow me. I have a hunch it is possible, but I have not fully understood the device being used at the event, Magic Sing ET-23H, if there are other ways for it to broadcast video and audio files besides its USB input. Any help to my current predicament is highly appreciated. Thank you. PS: Since I need at least 10 reputation to post more than 2 links and also post images, I will try to post the image & links at the comments (if my below 10 reputation would allow me).

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  • How can I remove old log entries from a log file and archive them somewhere else in Linux?

    - by Mike B
    CentOS 4.x I apologize in advance if this is not the appropriate place to ask this question. It pertains to a linux server / IT admin task. I've got a log file on an old CentOS 4.x server and I want to remove log entries older than a certain date and place them in a new file for archive. Here's an example of the log format: 2012-06-07 22:32:01,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:03,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:04,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123| 2012-06-07 22:32:10,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:12,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:15,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123| 2012-06-07 22:32:40,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:58,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:33:01,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123| 2012-06-07 22:33:01,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:33:02,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123| Essentially, I'm looking for a one-liner that will do the following: Find any events older than a provided YYYY-MM-DD and remove them from the primary log file. Take the deleted events from step 1 and put them in a new log file (Optional) Compress the new archive log file holding the deleted events. I'm aware that there are log rotate tools that do this but this should just be a one-time task so I'd prefer not to set that up. Additional notes: If the date part it tricky or too resource intensive, an alternative would be to just keep the last X number of lines and move the rest. I was originally thinking of something like tail -n 10000 > newfile.txt but that would mean moving the "good" logs to a new file and then doing a name swap... and then I'd still need to remove the "good" entries from the archive. This particular log file is pretty large (1 GB) so I'd prefer the task to be as resource and time efficient as possible. The extra pipes in the log concern me and I'm not sure if I'd need extra protection in the commands to avoid that from causing problems.

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  • Trying to grok Linux quotas, where is the data stored?

    - by CarpeNoctem
    So all the tutorials and documentation for the Linux quota system has left me confused. For each filesystem with quotas enabled/on where is the actual quota information stored? Is it filesystem metadata or is it in a file? Say user foo creates a new file on /home. How does the kernel determine whether user foo is below their hard limit? Does the kernel have to tally up quota information on that filesystem each time or is it in the superblock or somewhere else? As far as I understand, the kernel consults the aquota.user file for the actual rules, but where is the current quota usage data stored? Can this be viewed with any tools outside repquota and the like? TIA!! Update: Thanks for the help. I had already read that mini-HOWTO. I am pretty clear on the usage of the user space tools. What I was unclear on is whether the usage data was ALSO in the file that stored per-user limits and you answered this with a yes. From what I can tell, rc.sysinit runs quotacheck and quotaon on startup. The quotacheck program analyzes the filesystem, updates the aquota.* files. It then makes use of quota.h and the quotactl() syscall to inform the kernel of quota info. From this point forward the kernel hashes that information and increments/decrements quota stats as changes occur. Upon shutdown, the init.d/halt script runs the quotaoff command RIGHT before the filesystems are unmounted. The quotaoff command does not appear to update the aquota.* files with the information the kernel has in memory. I say this because the {a,c,m}times for the aquota.user file are only updated upon a reboot of the system or by manual running the quotacheck command. It appears - as far as I can tell - that the kernel just drops it's up-to-date usage data on the floor at shutdown. This information is never used to update the aquota.* files. They are updated during startup by quotacheck(rc.sysinit). Seems silly to me since that updated info had already been collected by the kernel. So...in conclusion I am still not entirely clear on the methods. ;)

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