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  • More on PHP and Oracle 11gR2 Improvements to Client Result Caching

    - by christopher.jones
    Oracle 11.2 brought several improvements to Client Result Caching. CRC is way for the results of queries to be cached in the database client process for reuse.  In an Oracle OpenWorld presentation "Best Practices for Developing Performant Application" my colleague Luxi Chidambaran had a (non-PHP generated) graph for the Niles benchmark that shows a DB CPU reduction up to 600% and response times up to 22% faster when using CRC. Sometimes CRC is called the "Consistent Client Cache" because Oracle automatically invalidates the cache if table data is changed.  This makes it easy to use without needing application logic rewrites. There are a few simple database settings to turn on and tune CRC, so management is also easy. PHP OCI8 as a "client" of the database can use CRC.  The cache is per-process, so plan carefully before caching large data sets.  Tables that are candidates for caching are look-up tables where the network transfer cost dominates. CRC is really easy in 11.2 - I'll get to that in a moment.  It was also pretty easy in Oracle 11.1 but it needed some tiny application changes.  In PHP it was used like: $s = oci_parse($c, "select /*+ result_cache */ * from employees"); oci_execute($s, OCI_NO_AUTO_COMMIT); // Use OCI_DEFAULT in OCI8 <= 1.3 oci_fetch_all($s, $res); I blogged about this in the past.  The query had to include a specific hint that you wanted the results cached, and you needed to turn off auto committing during execution either with the OCI_DEFAULT flag or its new, better-named alias OCI_NO_AUTO_COMMIT.  The no-commit flag rule didn't seem reasonable to me because most people wouldn't be specific about the commit state for a query. Now in Oracle 11.2, DBAs can now nominate tables for caching, either with CREATE TABLE or ALTER TABLE.  That means you don't need the query hint anymore.  As well, the no-commit flag requirement has been lifted.  Your code can now look like: $s = oci_parse($c, "select * from employees"); oci_execute($s); oci_fetch_all($s, $res); Since your code probably already looks like this, your DBA can find the top queries in the database and simply tune the system by turning on CRC in the database and issuing an ALTER TABLE statement for candidate tables.  Voila. Another CRC improvement in Oracle 11.2 is that it works with DRCP connection pooling. There is some fine print about what is and isn't cached, check the Oracle manuals for details.  If you're using 11.1 or non-DRCP "dedicated servers" then make sure you use oci_pconnect() persistent connections.  Also in PHP don't bind strings in the query, although binding as SQLT_INT is OK.

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  • Google I/O 2010 - Android REST client applications

    Google I/O 2010 - Android REST client applications Google I/O 2010 - Developing Android REST client applications Android 301 Virgil Dobjanschi This session will present architectural considerations for developing RESTful applications on the Android platform. It focuses on design patterns, platform integration and performance issues specific to the Android platform. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 3 0 ratings Time: 59:42 More in Science & Technology

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  • Tweeting through the Genesis Smart Client Framework

    This article demonstrates a basic Twitter client as a Genesis Hosted Application for the Genesis Smart Client Framework...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Ubuntu One Client 3.02 for windows - Authentication Failure signing in with existing account

    - by steigerj
    I have logged into ubuntu one using a browser successfully. But using the very same login email address and password in the windows client 3.02 gets me an 'authentication failed' message. I am 100% sure I used the same email address and password. My password does not contain any non-ascii characters. Someone suggested to use an older version of the client. Where could i possibly download a complete installer?

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  • Forti VPN Client not connecting to a server under Ubuntu 14.04

    - by deonis
    I've just updated to a new version of Ubuntu (14.04 86x64) and I got a very strange problem with Forti VPN Client. It seems running smoothly, but when I try to connect via GUI or terminal it hangs at the connection stage. here is what I see in terminal: STATUS::Setting up the tunnel STATUS::Connecting... #and this takes forever I know that it's not the problem with the server, the client works no problem on windows. Thank in advance ...

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  • How to recover after embarrassing yourself and your company?

    - by gaearon
    I work in an outsourcing company in Russia, and one of our clients is a financial company located in USA. For the last six months I have been working on several projects for this particular company, and as I was being assigned a larger project, I was invited to work onsite in USA in order to understand and learn the new system. Things didn't work out as well as I hoped because the environment was messy after original developers, and I had to spent quite some time to understand the quirks. However we managed to do the release several days ago, and it looks like everything's going pretty smooth. From technical perspective, my client seems to be happy with me. My solutions seem to work, and I always try to add some spark of creativity to what I do. However I'm very disorganized in a certain sense, as I believe many of you fellas are. Let me note that my current job is my first job ever, and I was lucky enough to get a job with flexible schedule, meaning I can come in and out of the office whenever I want as long as I have 40 hours a week filled. Sometimes I want to hang out with friends in the evening, and days after that I like to have a good sleep in the morning—this is why flexible schedule (or lack of one) is ideal fit for me. [I just realized this paragraph looks too serious, I should've decorated it with some UNICORNS!] Of course, after coming to the USA, things changed. This is not some software company with special treatment for the nerdy ones. Here you have to get up at 7:30 AM to get to the office by 9 AM and then sit through till 5 PM. Personally, I hate waking up in the morning, not to say my productivity begins to climb no sooner than at 5 o'clock, i.e. I'm very slow until I have to go, which is ironic. Sometimes I even stay for more than 8 hours just to finish my current stuff without interruptions. Anyway, I could deal with that. After all, they are paying for my trip, who am I to complain? They need me to be in their working hours to be able to discuss stuff. It makes perfect sense that fixed schedule doesn't make any sense for me. But it does makes sense that it does make sense for my client. And I am here for client, therefore sense is transferred. Awww, you got it. I was asked several times to come exactly at 9 AM but out of laziness and arrogance I didn't take these requests seriously enough. This paid off in the end—on my last day I woke up 10 minutes before final status meeting with business owner, having overslept previous day as well. Of course this made several people mad, including my client, as I ignored his direct request to come in time for two days in the row, including my final day. Of course, I didn't do it deliberately but certainly I could've ensured that I have at least two alarms to wake me up, et cetera...I didn't do that. He also emailed my boss, calling my behavior ridiculous and embarrassing for my company and saying “he's not happy with my professionalism at all”. My boss told me that “the system must work both in and out” and suggested me to stay till late night this day working in a berserker mode, fixing as many issues as possible, and sending a status email to my client. So I did, but I didn't receive the response yet. These are my questions to the great programmers community: Did you have situations where your ignorance and personal non-technical faults created problems for your company? Were you able to make up for your fault and stay in a good relationship with your client or boss? How? How would you act if you were in my situation?

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  • verify cert with certutil.exe

    - by Michal
    Hi, I have stupid problem, what is correct syntax on verify certificate in certificate store with certutil.exe. I have client certificate in cerstore. I try this: certutil.exe -verify CertCommonName but in finish with this error : DecodeFile returned The system cannot find the file specified. 0x80070002 (WIN32 : 2) LoadCert(Cert) returned The system cannot find the file specified. 0x80070002 (W IN32: 2) CertUtil: -verify command FAILED: 0x80070002 (WIN32: 2) CertUtil: The system cannot find the file specified. When I ping certutil.exe -ping it connect to pc.

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  • Any problems usinga GoDaddy SSL certificate on a Cisco ASA firewall?

    - by Richard West
    I need to purchase and install a SSL certificate on my Cisco ASA firewall. This will allow my VPN users to connect to my ASA without receiving the certificate error from the untrusted self assigned SSL certificate that is currently on the ASA. I had good experiences with the SSL certificates that GoDaddy sells. However, I'm concerned about using them. On my web servers I have to also install GoDaddy's "intermediate certificate bundle". On the ASA I do not think that I will be able to preform anything like this. I do not fully understand what the "intermediate certificate bundle" does, but obviously it's important. So my question is can I use a GoDaddy SSL certificate on an ASA without my users getting any type of warning or error about connecting to a site that using an untrusted SSL certificate. I need this to be as simple as possible for my end users and warning messages are always scary :) Thanks!

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  • Clearing Java certificates cache (force reload certificates)

    - by AlbertoFEM
    A simple question here. One application gave me this exception when trying to access a website with a expired certificate: java.security.cert.CertificateExpiredException So, I renewed the certificated from the website machine and restarted it. When I try to access it from Firefox or Chrome it will load the new certificate (which it's expiration date is set somewhere near 2040). The problem is, Java applications doesn't seems to renew this certificate, it seems to be stuck in some kind of internal cache. I already tried to add it to the keystore and set options in the application properties like -Dcom.sun.net.ssl.checkRevocation=false. No matter what I do, it always throw me a java.security.cert.CertificateExpiredException Any ideas?

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  • Using wildcard SSL certs (chain certificate) with mod_gnutls

    - by QWade
    I have a wildcard SSL certificate from GoDaddy that has three files: wildcard.crt gd_bundle.crt wildcard.key In setting up mod_gnutls to be used with Apache, I can get the site to come up, but it throws a warning that the SSL certificate has not been validated by a CA. When I use mod_ssl, I can stipulate a SSLCertificateChainFile directive and point it at the bd_bundle.crt file. I do not see how to do this with mod_gnutls. Any help is appreciated. I also know that mod_ssl supports SNI, so if there is not an easy answer, I will just try that. Thanks, QWade

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  • Jetty - Virtualhosting - SSL Certificates

    - by Walter White
    Hi all, I want to have different SSL certificates for different domains that I am hosting in a single Jetty instance. I do not want to front my Jetty application server with Apache. I am running Jetty 6.1.22. So far, I have only seen configurations with a single SSL certificate, and the configuration for SSL happens within server which leads me to believe that Jetty was designed to support a single SSL certificate. Please let me know if I can use Jetty with more than 1 certificate. I am considering migrating to JBoss Application Server 6.0 since it is closer to a real application server. Is this something that can be done there, and is it a supported feature? Walter

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  • Exchange 2010 OWA with Client Certificates

    - by Christian
    I have enabled Client Certificate Authentication for Exchange 2010 through IIS7 and the users are prompted to choose their User Certificate when they log in, but they are all then presented with the following error message Request Url: https://<domain_name>:443/owa/ User host address: <server_ip_address> OWA version: 14.1.355.2 Exception Exception type: System.NullReferenceException Exception message: Object reference not set to an instance of an object. Call stack Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.GetUserIdentities(OwaContext owaContext, OwaIdentity& logonIdentity, OwaIdentity& mailboxIdentity, Boolean& isExplicitLogon, Boolean& isAlternateMailbox, ExchangePrincipal& logonExchangePrincipal) Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.InternalDispatchRequest(OwaContext owaContext) Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchRequest(OwaContext owaContext) Microsoft.Exchange.Clients.Owa.Core.OwaRequestEventInspector.OnPostAuthorizeRequest(Object sender, EventArgs e) System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) The method I followed to enable Certificate authentiaction was from this post: http://www.miru.ch/2011/04/how-to-enable-certificate-based-authentication-on-exchange-2010/ Any ideas? Google isn't being very helpful

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  • Chrome shows "The site's security certificate is not trusted" error

    - by Emerald214
    From this morning I get this error whenever I access Google Docs and some websites. My system datetime is correct and I checked "Automatically from the Internet". My BIOS is OK. I cleared everything (cache, cookie, private data) in Chrome and restarted OS but nothing changes. How to fix it? Firefox works but Chrome has that problem. The site's security certificate is not trusted! You attempted to reach docs.google.com, but the server presented a certificate issued by an entity that is not trusted by your computer's operating system. This may mean that the server has generated its own security credentials, which Google Chrome cannot rely on for identity information, or an attacker may be trying to intercept your communications. You cannot proceed because the website operator has requested heightened security for this domain.

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  • SSL certificate for ISAPI redirected Web Site

    - by Daniel
    I have a Win 2003 server and I'm using Ionics Isapi Rewrite Filter to redirect requests made to a Web Site configured in IIS to another Apache2 Server in a server not exposed to the Internet. The Web Site has its host headers configured to catch requests for the specific site, and the redirection is being done with the ProxyPass directive. This is working OK. So far the scenario, my question is: I'd like to add a server certificate to the Apache server, but I don´t know if I need to add the certificate to both Apache and IIS sites. I think I still don´t get the theory behind this and would like to know from someone with expertise in the field the right way to implement this. Thank you in advance.

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  • Bad certificate error with RabbitMQ using SSL

    - by David Tinker
    I am trying to get RabbitMQ working with SSL on a couple of Gentoo servers. I get the following error in /var/log/rabbitmq/[email protected] when I try to connect to the management console using https: SSL: certify: ssl_connection.erl:1641:Fatal error: bad certificate I followed the instructions here: http://www.rabbitmq.com/ssl.html The annoying thing is that I have 2 cloned servers and it is working on one and not the other. As far as I can tell the machines are configured identically. I wrote a script to generate the certs etc. and have run it on both. I am not using client certificates. Anyone know how I can figure out whats wrong with my certificate(s)? I am using Erlang 15.2, RabbitMQ 2.7.9, OpenSSL 0.9.8k.

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  • How to set up an SSL Cert with Subject Alternative Name

    - by Darren Oster
    To test a specific embedded client, I need to set up a web server serving a couple of SSL (HTTPS) sites, say "main.mysite.com" and "alternate.mysite.com". These should be handled by the same certificate, with a Subject Name of "main.mysite.com" and a Subject Alternative Name of "alternate.mysite.com". This certificate needs to be in an authority chain back to a 'proper' CA (such as GoDaddy, to keep the cost down). My question is, are there any good tutorials on how to do this, or can someone explain the process? What sort of parent certificate do I need to purchase from the CA provider? My understanding of SSL certificates is limited, but as Manuel said in Fawlty Towers, "I learn...". I'm happy to work in Windows (IIS) or Linux (Apache) (or even OSX, for that matter). Thanks in advance.

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  • Convert svn repository to hg - authentication fails

    - by Kim L
    I'm trying to convert an existing svn repository to a mercurial repo with the following command hg convert <repository> <folder> My problem is that the svn repository's authentication is done with p12 certificates. I'm a bit lost on how to configure the certificate for the hg client so that I can pull the svn repo and convert it. Currently, if I try to run the above command, I get initializing destination hg-client repository abort: error: _ssl.c:480: error:14094410:SSL routines:SSL3_READ_BYTES:sslv3 alert handshake failure In other words, it cannot find the required certificate. The question is, how do I configure my hg client so that it can use my certificate? I'm using the command line hg client on linux.

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  • How do I set up an sftp user to login with a password to an EC2 ubuntu server ?

    - by Doron
    Hello, I have an Ubuntu Server running on an EC2 instance. To login to that server I use a certificate file without any password. I've installed and configured vsftpd and created a user (let's call him "testuser") for which I've set a /bin/false ssh terminal so it will only be able to connect via sftp and upload/access files on his home directory. However - when I try to connect to the server from my computer, running sftp testuser@my-ec2-server I get Permission denied (publickey). Connection closed messages so I can't log in. How can I remove the certificate requirement for this user only (meaning, the "ubuntu" user will still have to use the certificate file to login via ssh), so normal sftp clients will be able to connect using a username and a password ? Thank you. PS Using Ubuntu Server 10.10 official AMI from canonical, 64bit on a micro instance.

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  • Client-side certificates

    - by walshms
    My company purchased a wildcard certificate from a vendor. This certificate was successfully configured with Apache 2.2 to secure a subdomain. Everything on the SSL side works. Now I'm required to generate x509 client-side certificates to issue for this subdomain. I'm following along this page: (http://www.vanemery.com/Linux/Apache/apache-SSL.html), starting with "Creating Client Certificates for Authentication". I've generated the p12 files and successfully imported them into Firefox. When I browse to the site now, I get an error in FireFox that says "The connection to the server was reset while the page was loading." I think my problem is coming from not signing the client-side correctly. When I sign the client-side certificate, I'm using the PEM file (RapidSSL_CA_bundle.pem) from RapidSSL (who we bought the certificate from) for the -CA argument. For the -CAkey argument, I'm using the private key of the server. Is this correct?

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