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  • How to maximize http.sys file upload performance

    - by anelson
    I'm building a tool that transfers very large streaming data sets (possibly on the order of terabytes in a single stream; routinely in the tens of gigabytes) from one server to another. The client portion of the tool will read blocks from the source disk, and send them over the network. The server side will read these blocks off the network and write them to a file on the server disk. Right now I'm trying to decide which transport to use. Options are raw TCP, and HTTP. I really, REALLY want to be able to use HTTP. The HttpListener (or WCF if I want to go that route) make it easy to plug in to the HTTP Server API (http.sys), and I can get things like authentication and SSL for free. The problem right now is performance. I wrote a simple test harness that sends 128K blocks of NULL bytes using the BeginWrite/EndWrite async I/O idiom, with async BeginRead/EndRead on the server side. I've modified this test harness so I can do this with either HTTP PUT operations via HttpWebRequest/HttpListener, or plain old socket writes using TcpClient/TcpListener. To rule out issues with network cards or network pathways, both the client and server are on one machine and communicate over localhost. On my 12-core Windows 2008 R2 test server, the TCP version of this test harness can push bytes at 450MB/s, with minimal CPU usage. On the same box, the HTTP version of the test harness runs between 130MB/s and 200MB/s depending upon how I tweak it. In both cases CPU usage is low, and the vast majority of what CPU usage there is is kernel time, so I'm pretty sure my usage of C# and the .NET runtime is not the bottleneck. The box has two 6-core Xeon X5650 processors, 24GB of single-ranked DDR3 RAM, and is used exclusively by me for my own performance testing. I already know about HTTP client tweaks like ServicePointManager.MaxServicePointIdleTime, ServicePointManager.DefaultConnectionLimit, ServicePointManager.Expect100Continue, and HttpWebRequest.AllowWriteStreamBuffering. Does anyone have any ideas for how I can get HTTP.sys performance beyond 200MB/s? Has anyone seen it perform this well on any environment?

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  • CodeIgniter global variable

    - by Shishant
    Hello, I am using $data in all my views $this->load->view('my_view', $data); I have also autoload a Controller following this guide Extending Core Controller But I want to make $data global because in views there is a sidebar which is constant for whole project and displays info fetched through db in autoloaded controller Currently I have to manually write $data['todo'] for each and fetch info from autoloaded model. Thank You.

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  • Sonar and Eclipse IAM Plugin

    - by Hans Klock
    When I am using the IAM Eclipse Plugin for Maven I get an error while executing the sonar:sonar goal in clean install sonar:sonar The error in eclipse is 23:02:55 MESZ Starting Starting mojoExecution sonar-core:internal 23:03:44 MESZ fatal org.sonar.maven2.BatchMojo#execute() caused a linkage error (java.lang.NoSuchMethodError). Check the realms: ... java.lang.NoSuchMethodError: org.apache.maven.execution.ReactorManager.<init>(Ljava/util/List;)V Any idea how to fix it?

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  • Having Many Problems with Jquery UI 1.8.1 Dialog.js

    - by chobo2
    Hi I been using the jquery ui for quite a while now. This is the first time using 1.8 though and I am not sure why but it seems to me this plugin has taken steps backwards. I never had so much difficulty to use the Jquery UI as I am having now. First the documentation is out of date. Dependencies * UI Core * UI Draggable (Optional) * UI Resizable (Optional) After line 20mins of trying and getting error after error (like dialog is not a function) I realized that you need some other javascript file called "widget.js" So now I have Jquery 1.4.2.js UI Core.js UI Widget.js UI Dialog.js all on my page. I then did something like this $('#Delete').click(function () { var dialogId = "DeleteDialogBox"; var createdDialog = MakeDialogBox(dialogId, "Delete Conformation"); $('#tabConent').after(createdDialog); dialogId = String.format('#{0}', dialogId); $(dialogId).dialog({ resizable: true, height: 500, width: 500, modal: true, buttons: { 'Delete all items': function() { $(this).dialog('close'); }, Cancel: function() { $(this).dialog('close'); } } }); }); function MakeDialogBox(id, title) { var dialog = String.format('<div id="{0}" title="{1}"></div>', id, title); return dialog; } Now what this should be doing is it makes a where the dialog box should go. After that it should put it right after my tabs. So when watching it with firebug it does this. However once does the .dialog() method it moves the + all the stuff it generates and puts it after my footer. So now I have my dialog box under my footer tucked away in the bottom right hand corner. I want it dead in the center. In previous versions I don't think it mattered where the dialog code was on your page it would always be dead center. So what am I missing? The center.js(I don't know if this exists but seems like you need 100 javascript files now to get this to work proper).

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  • eclipse CDT codeassist doesnt work

    - by CodeMedic
    For some strange reason, my CDT code assist in the project I have been working doesn't seem to work anymore. Any idea where to look for? I did try removing the project's file ~/workspace/.metadata/.plugins/org.eclipse.cdt.make.core/MY-PROJECT.sc

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  • What are the recommended BEST CASE hardware requirements for TFS 2010

    - by Doug
    Hi guys, i have installed TFS 2010 in a 2 server setup with an App Tier server and a SQL Server and am not 100% happy with the performance. Both are running in VM's on SAN disks and have been given the following virtual hardware each: Windows 2008 R2 1 CPU @ 2.8Ghz 2gb RAM what should i lift - neither machine is hammered but both do go up to 80% when people are doing things on them - should i add another CPU to each - usually this is now required in a VMWARE setup but i don't know if TFS 2010 takes advantage of an extra core??? thank you in advance :-)

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  • IDynamicObject could not be found?!

    - by cvista
    When trying to run the sample code here: http://www.nikhilk.net/Live-Search-REST-API.aspx I get: Error 52 The type or namespace name 'IDynamicObject' could not be found (are you missing a using directive or an assembly reference?) E:\repo\NikhilK-dynamicrest-a93707a\NikhilK-dynamicrest-a93707a\Core\DynamicObject.cs 19 43 DynamicRest The project is running .net 4 - shouldn't this be a part of the standard imports? am i missing something? What do i need to do to make this work?

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  • "this" pointer changes in GDB backtrace

    - by Hans
    I am examining a core dump, and noticed that in one frame the 'this' pointer is different than in the next frame (in the same thread). Not just a little different, it went from 0x8167428 to 0x200. I am not that well-versed in using GDB, but this does not seem right to me. Is this problematic, and if so, what could be the cause?

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  • Selenium IDE and Drupal

    Can I use Selenium IDE on a Drupal system? I found http://drupal.org/project/selenium but that involves downloading Core and not using my current machine. Does anybody know of a way to use the IDE with Drupal, or if not what do you suggest I do?

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  • Using Apple autorelease pools without Objective-C

    - by PierreBdR
    I am developing an application that needs to work on Linux, Windows and Mac OS X. To that purpose, I am using C++ with Qt. For many reasons, on Mac OS X, I need to use CoreFoundation functions (such as CFBundleCopyBundleURL) that creates core objects that need to be released with CFRelease. But doing so generate a lots of these warnings: *** __NSAutoreleaseNoPool(): Object 0x224f7e0 of class NSURL autoreleased with no pool in place - just leaking All the code I've seen concerning these autorelease pools are written in Objective-C. Does anybody know how to create/use autorelease pools in C or C++?

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  • Avahi DNS Stack for iPhone?

    - by sneha
    Hello, I would like to know if we have an avahi api for iphone side? Alternatively, can we implement avahi protocol in iphone? The avahi API provides: avahi-core: an API for embedding a complete mDNS/DNS-SD stack into your software. This is intended for developers of embedded appliances only. We dissuade from using this API in normal desktop applications since it is not a good idea to run multiple mDNS stacks simultaneously on the same host.

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  • Any porting avaiable of backtrace for uclibc?

    - by user303967
    We are running the uclibc linux on ARM 9. The problem is uclibc doesn't support backtrace. When core-dump happen, cannot grap the call stack. Anyone has good solution on that? For example, an existing porting of backtrace for uclibc? or any good method to grap call stack when call dump happen(uclibc+ARM+Linux)? thanks

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  • Running virtual machines: Linux vs Windows 7

    - by vikp
    Hi, I have tried running windows xp development virtual machine under windows 7 and the performance was dreadful. I'm considering installing Linux and running the virtual machine from the Linux, but I'm not sure whether I can expect any performance gains? It's a 2.4ghz core 2 duo machine with 4gb ram and 5400 rpm hdd. Can somebody please recommend very cut down version of linux that can run VMWare player and isn't resource hungry? Thank you

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  • run jsf application with myeclipse and jboss server

    - by chetan
    I develop simple jsf login application,that use icefaces component but, when I tries to run it in jboss server I got following error. Can't find TLD for location [http://java.sun.com/jsf/core]. JAR containing the TLD may not be in the classpath Can't find TLD for location [http://java.sun.com/jsf/html]. JAR containing the TLD may not be in the classpath

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  • Error after installing Django (supposed PATH or PYTHONPATH "error")

    - by illuminated
    Hi all, I guess this is a PATH/PYTHONPATH error, but my attempts failed so far to make django working. System is Ubuntu 10.04, 64bit: mx:~/webapps$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION="Ubuntu 10.04 LTS" Python version: 2.6.5: @mx:~/webapps$ python -V Python 2.6.5 When I run django-admin.py, the following happens: mx:~/webapps$ django-admin.py Traceback (most recent call last): File "/usr/local/bin/django-admin.py", line 2, in <module> from django.core import management ImportError: No module named django.core Similar when I import django in python shell: mx:~/webapps$ python Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) [GCC 4.4.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import django Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named django >>> quit() More details: mx:~/webapps$ python -c "from distutils.sysconfig import get_python_lib; print get_python_lib()" /usr/lib/python2.6/dist-packages Within python shell: Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) [GCC 4.4.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import sys >>> print sys.path ['', '/usr/lib/python2.6/dist-packages/django', '/usr/local/lib/python2.6/dist-packages/django/bin', '/usr/local/lib/python2.6/dist-packages/django', '/home/petra/webapps', '/usr/lib/python2.6', '/usr/lib/python2.6/plat-linux2', '/usr/lib/python2.6/lib-tk', '/usr/lib/python2.6/lib-old', '/usr/lib/python2.6/lib-dynload', '/usr/lib/python2.6/dist-packages', '/usr/lib/python2.6/dist-packages/PIL', '/usr/lib/pymodules/python2.6'] django-admin.py can be found here: mx:~/webapps$ locate django-admin.py ~/install/sources/Django-1.2.1/build/lib.linux-i686-2.6/django/bin/django-admin.py ~/install/sources/Django-1.2.1/build/scripts-2.6/django-admin.py ~/install/sources/Django-1.2.1/django/bin/django-admin.py /usr/local/bin/django-admin.py /usr/local/lib/python2.6/dist-packages/django/bin/django-admin.py /usr/local/lib/python2.6/dist-packages/django/bin/django-admin.pyc and in the end this doesn't help: export PYTHONPATH="/usr/lib/python2.6/dist-packages/django:$PYTHONPATH" nor this: export PYTHONPATH="/usr/local/lib/python2.6/dist-packages/django:$PYTHONPATH" How to solve this !? Thanks all in advance! :)

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  • Are Drupal theme settings cached?

    - by barraponto
    i want to change theme_username, a core theme function that outputs that dreadful "not verified" string on users who are not logged in (when they comment, for example). i want a checkbox in admin/build/themes/settings/MYTHEME to change that. but since that theme function gets called a lot, will it hurt the performance of any site using my theme or are theme settings cached?

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  • Netbeans CVS - existing repo - existing working copy

    - by ExTexan
    I'm using Netbeans to develop with Drupal. I'm trying to let Netbeans get drupal core and modules from the repository on drupal.org to my local working copy. Problem is: I already have a working copy that is not versioned yet. When I try to checkout a copy from drupal.org, Netbeans asks if I want to create a new project - I don't. How can I turn my local copy into a "checked out" working copy?

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  • How to create JPA EntityMananger in Spring Context?

    - by HDave
    I have a JPA/Spring application that uses Hibernate as the JPA provider. In one portion of the code, I have to manually create a DAO in my application with the new operator rather than use Spring DI. When I do this, the @PersistenceContext annotation is not processed by Spring. In my code where I create the DAO I have an EntityManagerFactory which I used to set the entityManager as follows: @PersistenceUnit private EntityManagerFactory entityManagerFactory; MyDAO dao = new MyDAOImpl(); dao.setEntityManager(entityManagerFactory.createEntityManager()); The problem is that when I do this, I get a Hibernate error: Could not find UserTransaction in JNDI [java:comp/UserTransaction] It's as if the HibernateEntityManager never received all the settings I've configured in Spring: <bean id="myAppTestLocalEmf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="persistenceUnitName" value="myapp-core" /> <property name="persistenceUnitPostProcessors"> <bean class="com.myapp.core.persist.util.JtaPersistenceUnitPostProcessor"> <property name="jtaDataSource" ref="myappPersistTestJdbcDataSource" /> </bean> </property> <property name="jpaProperties"> <props> <prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</prop> <prop key="hibernate.transaction.manager_lookup_class">com.atomikos.icatch.jta.hibernate3.TransactionManagerLookup</prop> </props> </property> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> <property name="showSql" value="true" /> <!-- The following use the PropertyPlaceholderConfigurer but it doesn't work in Eclipse --> <property name="database" value="$DS{hibernate.database}" /> <property name="databasePlatform" value="$DS{hibernate.dialect}" /> I am not sure, but I think the issue might be that I am not creating the entity manager correctly with the plain vanilla createEntityManager() call rather than passing in a map of properties. I say this because when Spring's LocalContainerEntityManagerFactoryBean proxy's the call to Hibernate's createEntityManager() all of the Spring configured options are missing. That is, there is no Map argument to the createEntityManager() call. Perhaps it is another problem entirely however....not sure!

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