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  • Load Balancer Timeout

    - by Anilkumar
    "This website is temporarily unavailable. Please check back later. Unfortunately there were no suitable nodes available to serve this request." When I request a stored procedure from my program (SP is taking 2 minutes to execute) the above error is getting. I believe this is because of Load balancer Time out. How we can increment the load balancer time out.

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  • MySQL: LOAD DATA reclaim disk space after delete

    - by Michael
    I have a DB schema composed of MYISAM tables, i am interested to delete old records from time to time from some of the tables. I know that delete does not reclaim the memory space, but as i found in a description of DELETE command, inserts may reuse the space deleted In MyISAM tables, deleted rows are maintained in a linked list and subsequent INSERT operations reuse old row positions. I am interested if LOAD DATA command also reuses the deleted space? UPDATE I am also interested how the index space reclaimed?

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  • PostgreSQL 9.1 Database Replication Between Two Production Environments with Load Balancer

    - by littleK
    I'm investigating different solutions for database replication between two PostgreSQL 9.1 databases. The setup will include two production servers on the cloud (Amazon EC2 X-Large Instances), with an elastic load balancer. What is the typical database implementation for for this type of setup? A master-master replication (with Bucardo or rubyrep)? Or perhaps use only one shared database between the two environments, with a shared disk failover? I've been getting some ideas from http://www.postgresql.org/docs/9.0/static/different-replication-solutions.html. Since I don't have a lot of experience in database replication, I figured I would ask the experts. What would you recommend for the described setup?

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  • Elastic Load Balancer & SSL termination

    - by Aaron Scruggs
    I am setting up a Rails app on AWS that: 1) all traffic must ssl encrypted 2) will highly fluctuate in traffic on a weekly basis 3) will by maintained by someone that is a stronger coder than sysadmin, but will be responsible for both I am thinking that SSL termination on an elastic load balancer backed by small ec2 instances running nginx and unicorn A small subset of the requests will take longer than 10s, because of this I am also debating using 'thin' instead of 'unicorn'. My question is this: Is this sane? I am stepping into a quagmire of cost, maintainability, security or performance problems?

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  • Tuxedo Load Balancing

    - by Todd Little
    A question I often receive is how does Tuxedo perform load balancing.  This is often asked by customers that see an imbalance in the number of requests handled by servers offering a specific service. First of all let me say that Tuxedo really does load or request optimization instead of load balancing.  What I mean by that is that Tuxedo doesn't attempt to ensure that all servers offering a specific service get the same number of requests, but instead attempts to ensure that requests are processed in the least amount of time.   Simple round robin "load balancing" can be employed to ensure that all servers for a particular service are given the same number of requests.  But the question I ask is, "to what benefit"?  Instead Tuxedo scans the queues (which may or may not correspond to servers based upon SSSQ - Single Server Single Queue or MSSQ - Multiple Server Single Queue) to determine on which queue a request should be placed.  The scan is always performed in the same order and during the scan if a queue is empty the request is immediately placed on that queue and request routing is done.  However, should all the queues be busy, meaning that requests are currently being processed, Tuxedo chooses the queue with the least amount of "work" queued to it where work is the sum of all the requests queued weighted by their "load" value as defined in the UBBCONFIG file.  What this means is that under light loads, only the first few queues (servers) process all the requests as an empty queue is often found before reaching the end of the scan.  Thus the first few servers in the queue handle most of the requests.  While this sounds non-optimal, in fact it capitalizes on the underlying operating systems and hardware behavior to produce the best possible performance.  Round Robin scheduling would spread the requests across all the available servers and thus require all of them to be in memory, and likely not share much in the way of hardware or memory caches.  Tuxedo's system maximizes the various caches and thus optimizes overall performance.  Hopefully this makes sense and now explains why you may see a few servers handling most of the requests.  Under heavy load, meaning enough load to keep all servers that can handle a request busy, you should see a relatively equal number of requests processed.  Next post I'll try and cover how this applies to servers in a clustered (MP) environment because the load balancing there is a little more complicated. Regards,Todd LittleOracle Tuxedo Chief Architect

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  • Load Test Manifesto

    - by jchang
    Load testing used to be a standard part of the software development, but not anymore. Now people express a preference for assessing performance on the production system. There is a lack of confidence that a load test reflects what will actually happen in production. In essence, it has become accepted that the value of load testing is not worth the cost and time, and perhaps whether there is any value at all. The main problem is the load test plan criteria – excessive focus on perceived importance...(read more)

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  • IIS load balancing and site deployment

    - by KLC
    Hi, currently I have a site sits on one IIS7 server. When we deploy a new version of the site, we bring the site down and display an offline page. What I really want is have two same exact copies of the site sits in one IIS 7 server and load balance users among both servers. when we deploy a new version of the site, we will bring site1 down (users in site1 automatically routes to site2 on next postback), when site1 deployment is complete, bring site2 down (users in site2 being routes to site1 on next postback). is this even possible?

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  • how to create simulator for web application for load test and stress test

    - by girish
    i m developing a web application but...now i need to create simulator for the same...that will be able to re-run the process that has been done on website... let's say i m developing a auction site where user's bid on product.... during these process the number of user's bid on the same product and at the end one user buy the product... now what i want is.. i want to record this process or any thing so that i can run the process for the same again so that i can test the load and the stress on web application and the database server.. Thank you.

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  • Use AJAX to load webpage content into DIV

    - by arik-so
    Hello. I have a text field. When I type something into than text field, I want to load stuff into the DIV below. That's my code equivalent: <input type="text" onkeyup="/* I am not sure, how it's done, but I'll just write: */ document.getElementById('search_results').innerHTML = getContents('search.php?query='+this.value);" /><br/> <div id="search_results"></div> Hope you can help. Thanks in advance! EDIT: I would appreciate it if the solution did not involve using jQuery - as long as it's possible.

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  • load/unload C dll with C# problems

    - by Goran
    I'm having problems with external native DLL. I'm working on ASP.NET 1.1 web application and have this DLL which I load through DLLImport directives. This is how I map DLL functions: [DllImport("somedllname", CallingConvention=CallingConvention.StdCall)] public static extern int function1(string lpFileName,string lpOwnerPw,string lpUserPw); [DllImport("somedllname", CallingConvention=CallingConvention.StdCall)] public static extern int function2(int nHandle); I call the dll methods and all works great, but I have problems with this DLL crashing my web site on some cases, so I would like an option to unload the dll after I use it. I found a solution at this link, but I don't have 'UnmanagedFunctionPointer' attribute in .NET 1.1 available. http://blogs.msdn.com/jonathanswift/archive/2006/10/03/Dynamically-calling-an-unmanaged-dll-from-.NET-_2800_C_23002900_.aspx Is there a way I can achieve what this guy did with his example?

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  • Load testing a quicktime streaming server from ubuntu machine

    - by ebeland
    I have software that can launch and control multiple firefox browsers on Ubuntu EC2 images. I need to run a small load test against a QuickTime Streaming server. The stream starts automatically when loaded in a browser that has the QuickTime plugin, so I don't need to automate the stream once it starts. Alternately, I can also make these machines run arbitrary ruby code or executables. How can I get these ubuntu machines to pull in the stream? Also, how can I capture bandwidth usage (maybe a shell script?) on the worker machines?

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  • MySQL LOAD DATA LOCAL INFILE example in python?

    - by David Perron
    I am looking for a syntax definition, example, sample code, wiki, etc. for executing a LOAD DATA LOCAL INFILE command from python. I believe I can use mysqlimport as well if that is available, so any feedback (and code snippet) on which is the better route, is welcome. A Google search is not turning up much in the way of current info The goal in either case is the same: Automate loading hundreds of files with a known naming convention & date structure, into a single MySQL table. David

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  • jquery load method

    - by cognos79
    I am using mscaptcha image and trying to only reload the captcha image on button click. Seems like the captcha image is being loaded twice sometimes. <script type="text/javascript"> $(document).ready(function() { $('#btnSubmit').click(function() { $('#dvCaptcha').load('default.aspx #dvCaptcha'); }); }); </script> <div id="btnDiv"> <asp:Button ID="btnSubmit" runat="server" Text="Submit" /> </div> <div id="dvCaptcha"> <cc1:CaptchaControl ID="ccJoin" runat="server" CaptchaBackgroundNoise="none" CaptchaLength="5" CaptchaHeight="60" CaptchaWidth="200" CaptchaLineNoise="None" CaptchaMinTimeout="5" CaptchaMaxTimeout="240" /> </div> Any ideas?

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  • jquery load links not clickable

    - by john morris
    ok i am loading a separate page with links in it, into a page named index.php. it loads fine, but when i click one of the links inside the loaded content, nothing happens. they dont act as links. but if i do a alert('hi'); after the load('page.html'); then it will work. any ideas on getting this to work without alerting something after it loads? oh also i cant use a callback, unless there is a way to update the get variable because the page loading, has a $_GET variable, and the links inside the loaded page are supposed to update the $_GET variable. anyways is there a way to make the links clickable after loading the page?

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  • what is value of x for load and store

    - by Kevinniceguy
    This is some challenge On a single processor system, in which load and store are assumed to be atomic, what are all the possible values for x after both threads have completed in the following execution, assuming that x is initialised to O? Hint: you need to consider how this code might be compiled into machine language. for (int i = 0; i < 5; i++) : x = x + 1; for (int j = 0; j < 5; j++) : x = x + 1;

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  • Fetch and load a whole page with AJAX

    - by nimo
    I realize that it's generally not a good idea to do this but the reason why I want to is because it's a really heavy page and I want to show the user progress of the download and when it's done load the page. I can either do this with some kind of spinner but is it possible for me to show the actual progress? Can I see how much and what data has been downloaded? Let's say I use jQuery for the AJAX-request how do I do this? If you have other suggestions please feel free to suggest.

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  • load data only when slide down with jquery

    - by hd
    I have a link that when user clicks on it some data loaded into a div. I want to display waiting message to user until the data fetch completely from server and then show it to user. I also want to call the data url happen only when the result box is going down(slide down) not in both of slide down and slide up events to reduce load on server. my code is here but i don't know how implement second part into it: $(document).ready(function() { $("#prereq").hide(); $("#prereqlink").click(function() { $("#prereq").html("please wait ..."); $("#prereq").slideToggle("slow"); $.ajax({ url:"referee.php", success:function(data) { $("#prereq").html(data); } }); }); }); would you help me??

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  • jquery .load() function only gets called once

    - by user1288099
    the html <div class="stackwrapper" id="user1"></div> <div class="stackwrapper" id="user2"></div> <div class="userdrawings"></div> the javascript $('.stackwrapper').click(function(e){ var id=$(this).attr('id'); $('.userdrawings').load('loadSession.php?user='+id).fadeIn("slow"); }); Somehow it only works at once, only at the first click on stackwrapper, when I click on the second one, the function is not triggered again.

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  • .net load balancing for server

    - by user1439111
    Some time ago I wrote server software which is currently running at it's max. (3k users average). So I decided to rewrite certain parts so I can run the software at another server to balance it's load. I can't simply start another instance of the server since there is some data which has to be available to all users. So I was thinking of creating a small manager and all the servers connect and send their (relevant)data to the manager. But it also got me thinking about another problem. The manager could also reach it's limits which is exactly what i'm trying to prevent in the future. So I would like to know how I could fix this problem. (I have already tried to optimize critical parts of the software but I can't optimize it forever)

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  • jquery load and tinymce gives me a "g.win.document is null" on subsequent loads

    - by Patrice Peyre
    So... very excited as first post on stackoverflow I have this page, clicking a button will call editIEPProgram(). editIEPProgram counts how many specific divs exists, adds another div, loads it with html from '/content/mentoring/iep_program.php' and then calls $("textarea.tinymce").tinymce to add a rich text editor to the newly added text boxes. It finally adds a tab which handles the new stuff and bob is your uncle. It ALMOST works. Clicking the button the first adds everything and everything woks, on the second and subsequent click, everything is added but the tinymce fails to initiate (I guess) and gives me "g.win.document is null". I have been on it for some time now and losing all my sanity. please, help.me. function editIEPProgram(){ var index = $("div[id^=iep_program]").size(); var target_div = "iep_program_"+index; $("#program_container") .append( $("<div></div>") .attr("id", target_div) .addClass("no_overflow_control") ); $("#"+target_div).load ( "/content/mentoring/iep_program.php", {index:index}, function() { $("textarea.tinymce").tinymce({ script_url: "/scripts/tiny_mce.js",height:"60", theme:"advanced",skin:"o2k7",skin_variant : "silver", plugins : "spellchecker,advlist,preview,pagebreak,style,layer,save,advhr,advimage,advlink,searchreplace,paste,noneditable,visualchars,nonbreaking,xhtmlxtras", theme_advanced_buttons1 : "spellchecker,|,bold,italic,underline,strikethrough,|,formatselect,|,forecolor,backcolor,|,bullist,numlist,|,outdent,indent,|,undo,redo,|,link,unlink,image,cleanup,preview", theme_advanced_buttons2 : "", theme_advanced_buttons3 : "", theme_advanced_toolbar_location : "top", theme_advanced_toolbar_align : "left", content_css : "/css/main.css" }); }); $("#tab_container") .tabs("add", "#"+target_div,"New program") .tabs("select", $("#tab_container").tabs("length")-1); }

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  • OpenLDAP mirror mode replication failing with TLS behind a load balancer

    - by Lynn Owens
    I have two OpenLDAP servers that are both running TLS. They are: ldap1.mydomain.com ldap2.mydomain.com I also have a load balancer cluster with a dns name of it's own: ldap.mydomain.com The SSL certificate has a CN of ldap.mydomain.com, with SANs of ldap1.mydomain.com and ldap2.mydomain.com. Everything works... Except mirror mode replication. My mirror mode replication is setup like this: ldap.conf TLS_REQCERT allow cn=config.ldif olcServerID: 1 ldap://ldap1.mydomain.com olcServerID: 2 ldap://ldap2.mydomain.com On ldap1, olcDatabase{1}hdb.ldif olcMirrorMode: TRUE olcSyncrepl: {0}rid=001 provider=ldap://ldap2.mydomain.com bindmethod=simple bindmethod=simple binddn="cn=me,dc=mydomain,dc=com" credentials="REDACTED" starttls=yes searchbase="dc=mydomain,dc=com" schemachecking=on type=refreshAndPersist retry="60 +" On ldap2, olcDatabase{1}hdb.ldif olcMirrorMode: TRUE olcSyncrepl: {0}rid=001 provider=ldap://ldap1.mydomain.com bindmethod=simple bindmethod=simple binddn="cn=me,dc=mydomain,dc=com" credentials="REDACTED" starttls=yes searchbase="dc=mydomain,dc=com" schemachecking=on type=refreshAndPersist retry="60 +" Here's the errors I'm getting in syslog: Dec 1 21:05:01 ldap1 slapd[6800]: slap_client_connect: URI=ldap://ldap2.mydomain.com DN="cn=me,dc=mydomain,dc=com" ldap_sasl_bind_s failed (-1) Dec 1 21:05:01 ldap1 slapd[6800]: do_syncrepl: rid=001 rc -1 retrying Dec 1 21:05:08 ldap1 slapd[6800]: conn=1111 fd=20 ACCEPT from IP=ldap.mydomain.com:2295 (IP=ldap1.mydomain.com:636) Dec 1 21:05:08 ldap1 slapd[6800]: conn=1111 fd=20 closed (TLS negotiation failure) Any ideas? I've been working on OpenLdap for way too long now.

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  • Load Balance WCF and Share a Remote MSMQ for High Throughput

    - by BarDev
    After a ton of reading in books and on the web, I have noticed hints of information that WCF and MSMQ can be used in achieving high throughput. The information I have seen mentions using multiple WCF services in a farm that reads from a single MSMQ queue. The problem is that I have found paragraphs here and there that mentions that high throughput can be done, but I cannot seem to find a document of how to implement it. The following is an excerpt from a MSDN article. The following paragraph is from Best Practices for Queued Communication http://msdn.microsoft.com/en-us/library/ms731093.aspx To achieve higher throughput and availability, use a farm of WCF services that read from the queue. This requires that all of these services expose the same contract on the same endpoint. The farm approach works best for applications that have high production rates of messages because it enables a number of services to all read from the same queue. This is what I'm trying to solve. I have an intranet application where a client sends a request to a WCF service. But I want the ability to load balance the WCF services on multiple servers in a farm. I also want these WCF services in the farm to do transactional reads from a remote MSMQ when an item is available in the Queue. If this is possible, an issue I have is that I do not understand the activation process of WCF to retrieve messages from a remote queue. If this is possible, does anyone know of any articles or Webcasts that would explain it in detail? BarDev

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  • When using TCP load balancing with HAProxy, does all outbound traffic flow through the LB?

    - by user122875
    I am setting up an app to be hosted using VMs(probably amazon, but that is not set in stone) which will require both HTTP load balancing and load balancing a large number(50k or so if possible) of persistant TCP connections. The amount of data is not all that high, but updates are frequent. Right now I am evaluating load balancers and am a bit confused about the architecture of HAProxy. If I use HAProxy to balance the TCP connections, will all the resulting traffic have to flow through the load balancer? If so, would another solution(such as LVS or even nginx_tcp_proxy_module) be a better fit?

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