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  • How to config mysql-server for heavy load

    - by Rasmus
    Im in the process of setting up a new database server. I have been running a few mysql database servers before and it has been working okay. But i would like to hear the recommended setup for my server. For example, what should i set the max connection, query_cache_size, table_cache and so on. I have arround 4-600 per second: Open tables: 112 Queries per second avg: 430.386. The server i am setting it up on have the following configuration: Linux version 2.6.32-5-amd64 (Debian 2.6.32-41squeeze2) 2x Intel Xeon X3440 @ 2.53GHz 4GB Ram /, /boot, /tmp etc on Software RAID1, 2x 7200RPM SATA Data location on Software RAID0, 2x7200RPM SATA Im am going to place the mysql databases on the RAID0. Am im missing anything? Let me know! Thanks in advance, im looking forward to hearing from you :-) /Rasmus

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  • CPU load, USB connection vs. NIC

    - by T.J. Crowder
    In general, and understanding the answer may vary by manufacturer and model (and driver, and...), in consumer-grade workstations with integrated NICs, does the NIC rely on the CPU for a lot of help (as is typically the case with a USB controller, for instance), or is it fairly intelligent and capable on its own (like, say, the typical Firewire controller)? Or is the question too general to answer? (If it matters, you can assume Linux.) Background: I'm looking at connecting a device (digital television capture) that will be delivering ~20-50 Mbit/sec of data to a somewhat under-powered workstation. I can get a USB 2 High-speed device, or a network-attached device, and am interested in avoiding impacting the CPU where possible. Obviously, if it's a 100Mbit NIC, that's roughly half its theoretical inbound bandwidth, whereas it's only roughly a tenth of the 480 Mbit/second the USB 2 "High Speed" interface. But if the latter requires a lot of CPU support and the former doesn't...

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  • How to export SQL Server data from corrupted database (with disk write error)

    - by damitamit
    IT realised there was a disk write error on our production SQL Server 2005 and hence was causing the backups to fail. By the time they had realised this the nightly backup was old, so were not able to just restore the backup on another server. The database is still running and being used constantly. However DBCC CheckDB fails. Also the SQL Server backup task fails, Copy Database fails, Export Data Wizard fails. However it seems all the data can be read from the tables (i.e using bcp etc) Another observation I have made is that the Transaction Log is nearly double the size of the Database. (Does that mean all the changes arent being written to the MDF?) What would be the best plan of attack to get the database to a state where backups are working and the data is safe? Take the database offline and use the MDF/LDF to somehow create the database on another sql server? Export the data from the database using bcp. Create the database (use the Generate Scripts function on the corrupt db to create the schema on the new db) on another sql server and use bcp again to import the data. Some other option that is the right course of action in this situation? The IT manager says the data is safe as if the server fails, the data can be restored from the mdf/ldf. I'm not sure so insisted that we start exporting the data each night as a failsafe (using bcp for example). IT are also having issues on the hardware side of things as supposedly the disk error in on a virtualized disk and can't be rebuilt like a normal raid array (or something like that). Please excuse my use of incorrect terminology and incorrect assumptions on how Sql Server operates. I'm the application developer and have been called to help (as it seems IT know less about SQL Server than I do). Many Thanks, Amit

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  • Where do vendors publish internal transfer rates of HDDs?

    - by red888
    So I've started to dig into storage fundamentals and found that in order to calculate the IOPS of a HDD you need to know the internal transfer rate of the drive (time it takes data to move from the platters to internal disk's cache). I went on newegg and even a few vendor sites and could not find this info published for any HDDs. Is it sometimes called something else? Take this link to a seagate HDD for instance. Nowhere do I see "internal transfer rate", but I do see something called "Sustained Data Rate OD"- is that the same thing? Just so you know where I'm getting this info (Book: "Information Storage and Management Storing, Managing..."): Consider an example with the following specifications provided for a disk: The average seek time is 5 ms in a random I/O environment; therefore, T = 5 ms. Disk rotation speed of 15,000 revolutions per minute or 250 revolutions per second — from which rotational latency (L) can be determined, which is one-half of the time taken for a full rotation or L = (0.5/250 rps expressed in ms). 40 MB/s internal data transfer rate, from which the internal transfer time (X) is derived based on the block size of the I/O — for example, an I/O with a block size of 32 KB; therefore X = 32 KB/40 MB. Consequently, the time taken by the I/O controller to serve an I/O of block size 32 KB is (TS) = 5 ms + (0.5/250) + 32 KB/40 MB = 7.8 ms. Therefore, the maximum number of I/Os serviced per second or IOPS is (1/TS) = 1/(7.8 × 10^-3) = 128 IOPS.

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  • Oracle redo log performance degradation when inserting

    - by Aldarund
    I have a oracle 11g database. I'm testing in for inserts. The database running in noarchive mode. I have 3 redo log configured, each 2gb. I'm trying to insert data into test table. At begin it goes fine with 15k ins/second. I make a commit after 200 inserts. But after about 1.3m inserted records it become really slow, about 1-2k ins/second. As i noticed in resource explorer at this point we have filled all redo logs and so the inserts from this points work slow. So my question is why it become so slow when it fills redo logs, even if i commit each 200 records. And how this situation can be fixed ( except the turning off logging completely at inserts)

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  • Binding data to subgrid

    - by bhargav
    i have a jqgrid with a subgrid...the databinding is done in javascript like this <script language="javascript" type="text/javascript"> var x = screen.width; $(document).ready(function () { $("#projgrid").jqGrid({ mtype: 'POST', datatype: function (pdata) { getData(pdata); }, colNames: ['Project ID', 'Due Date', 'Project Name', 'SalesRep', 'Organization:', 'Status', 'Active Value', 'Delete'], colModel: [ { name: 'Project ID', index: 'project_id', width: 12, align: 'left', key: true }, { name: 'Due Date', index: 'project_date_display', width: 15, align: 'left' }, { name: 'Project Name', index: 'project_title', width: 60, align: 'left' }, { name: 'SalesRep', index: 'Salesrep', width: 22, align: 'left' }, { name: 'Organization:', index: 'customer_company_name:', width: 56, align: 'left' }, { name: 'Status', index: 'Status', align: 'left', width: 15 }, { name: 'Active Value', index: 'Active Value', align: 'left', width: 10 }, { name: 'Delete', index: 'Delete', align: 'left', width: 10}], pager: '#proj_pager', rowList: [10, 20, 50], sortname: 'project_id', sortorder: 'asc', rowNum: 10, loadtext: "Loading....", subGrid: true, shrinkToFit: true, emptyrecords: "No records to view", width: x - 100, height: "100%", rownumbers: true, caption: 'Projects', subGridRowExpanded: function (subgrid_id, row_id) { var subgrid_table_id, pager_id; subgrid_table_id = subgrid_id + "_t"; pager_id = "p_" + subgrid_table_id; $("#" + subgrid_id).html("<table id='" + subgrid_table_id + "' class='scroll'></table><div id='" + pager_id + "' class='scroll'></div>"); jQuery("#" + subgrid_table_id).jqGrid({ mtype: 'POST', postData: { entityIndex: function () { return row_id } }, datatype: function (pdata) { getactionData(pdata); }, height: "100%", colNames: ['Event ID', 'Priority', 'Deadline', 'From Date', 'Title', 'Status', 'Hours', 'Contact From', 'Contact To'], colModel: [ { name: 'Event ID', index: 'Event ID' }, { name: 'Priority', index: 'IssueCode' }, { name: 'Deadline', index: 'IssueTitle' }, { name: 'From Date', index: 'From Date' }, { name: 'Title', index: 'Title' }, { name: 'Status', index: 'Status' }, { name: 'Hours', index: 'Hours' }, { name: 'Contact From', index: 'Contact From' }, { name: 'Contact To', index: 'Contact To' } ], caption: "Action Details", rowNum: 10, pager: '#actionpager', rowList: [10, 20, 30, 50], sortname: 'Event ID', sortorder: "desc", loadtext: "Loading....", shrinkToFit: true, emptyrecords: "No records to view", rownumbers: true, ondblClickRow: function (rowid) { } }); jQuery("#actiongrid").jqGrid('navGrid', '#actionpager', { edit: false, add: false, del: false, search: false }); } }); jQuery("#projgrid").jqGrid('navGrid', '#proj_pager', { edit: false, add: false, del: false, excel: true, search: false }); }); function getactionData(pdata) { var project_id = pdata.entityIndex(); var ChannelContact = document.getElementById('ctl00_ContentPlaceHolder2_ddlChannelContact').value; var HideCompleted = document.getElementById('ctl00_ContentPlaceHolder2_chkHideCompleted').checked; var Scm = document.getElementById('ctl00_ContentPlaceHolder2_chkScm').checked; var checkOnlyContact = document.getElementById('ctl00_ContentPlaceHolder2_chkOnlyContact').checked; var MerchantId = document.getElementById('ctl00_ContentPlaceHolder2_ucProjectDetail_hidden_MerchantId').value; var nrows = pdata.rows; var npage = pdata.page; var sortindex = pdata.sidx; var sortdir = pdata.sord; var path = "project_brow.aspx/GetActionDetails" $.ajax({ type: "POST", url: path, data: "{'project_id': '" + project_id + "','ChannelContact': '" + ChannelContact + "','HideCompleted': '" + HideCompleted + "','Scm': '" + Scm + "','checkOnlyContact': '" + checkOnlyContact + "','MerchantId': '" + MerchantId + "','nrows': '" + nrows + "','npage': '" + npage + "','sortindex': '" + sortindex + "','sortdir': '" + sortdir + "'}", contentType: "application/json; charset=utf-8", success: function (data, textStatus) { if (textStatus == "success") obj = jQuery.parseJSON(data.d) ReceivedData(obj); }, error: function (data, textStatus) { alert('An error has occured retrieving data!'); } }); } function ReceivedData(data) { var thegrid = jQuery("#actiongrid")[0]; thegrid.addJSONData(data); } function getData(pData) { var dtDateFrom = document.getElementById('ctl00_ContentPlaceHolder2_dtDateFrom_textBox').value; var dtDateTo = document.getElementById('ctl00_ContentPlaceHolder2_dtDateTo_textBox').value; var Status = document.getElementById('ctl00_ContentPlaceHolder2_ddlStatus').value; var Type = document.getElementById('ctl00_ContentPlaceHolder2_ddlType').value; var Channel = document.getElementById('ctl00_ContentPlaceHolder2_ddlChannel').value; var ChannelContact = document.getElementById('ctl00_ContentPlaceHolder2_ddlChannelContact').value; var Customers = document.getElementById('ctl00_ContentPlaceHolder2_txtCustomers').value; var KeywordSearch = document.getElementById('ctl00_ContentPlaceHolder2_txtKeywordSearch').value; var Scm = document.getElementById('ctl00_ContentPlaceHolder2_chkScm').checked; var HideCompleted = document.getElementById('ctl00_ContentPlaceHolder2_chkHideCompleted').checked; var SelectedCustomerId = document.getElementById("<%=hdnSelectedCustomerId.ClientID %>").value var MerchantId = document.getElementById('ctl00_ContentPlaceHolder2_ucProjectDetail_hidden_MerchantId').value; var nrows = pData.rows; var npage = pData.page; var sortindex = pData.sidx; var sortdir = pData.sord; PageMethods.GetProjectDetails(SelectedCustomerId, Customers, KeywordSearch, MerchantId, Channel, Status, Type, dtDateTo, dtDateFrom, ChannelContact, HideCompleted, Scm, nrows, npage, sortindex, sortdir, AjaxSucceeded, AjaxFailed); } function AjaxSucceeded(data) { var obj = jQuery.parseJSON(data) if (obj != null) { if (obj.records!="") { ReceivedClientData(obj); } else { alert('No Data Available to Display') } } } function AjaxFailed(data) { alert('An error has occured retrieving data!'); } function ReceivedClientData(data) { var thegrid = jQuery("#projgrid")[0]; thegrid.addJSONData(data); } </script> as u can see projgrid is my parent grid and action grid is my subgrid to be shown onclicking the '+' symbol Projgrid is binded and being displayed but when it comes to subgrid im able to get the data but the problem comes at the time of binding data to subgrid which is done in function named ReceivedData where you can see like this function ReceivedData(data) { var thegrid = jQuery("#actiongrid")[0]; thegrid.addJSONData(data); } "data" is what i wanted exactly but it cannot be binded to actiongrid which is the subgrid Thanx in advance for help

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  • How to Fix my jQuery code in IE?? Works in Firefox..

    - by scott jarvis
    I am using jQuery to show/hide a div container (#pluginOptionsContainer), and load a page (./plugin_options.php) inside it with the required POST vars sent. What POST data is sent is based on the value of a select list (#pluginDD) and the click of a button (#pluginOptionsBtn)... It works fine in Firefox, but doesn't work in IE.. The '$("#pluginOptionsContainer").load()' request never seems to finish in IE - I only see the loading message forever... bind(), empty() and append() all seem to work fine in IE.. But not load().. Here is my code: // wait for the DOM to be loaded $(document).ready(function() { // hide the plugin options $('#pluginOptionsContainer').hide(); // This is the hack for IE if ($.browser.msie) { $("#pluginDD").click(function() { this.blur(); this.focus(); }); } // set the main function $(function() { // the button shows hides the plugin options page (and its container) $("#pluginOptionsBtn") .click(function() { // show the container of the plugin options page $('#pluginOptionsContainer').empty().append('<div style="text-align:center;width:99%;">Loading...</div>'); $('#pluginOptionsContainer').toggle(); }); // set the loading message if user changes selection with either the dropdown or button $("#pluginDD,#pluginOptionsBtn").bind('change', function() { $('#pluginOptionsContainer').empty().append('<div style="text-align:center;width:99%;">Loading...</div>'); }); // then update the page when the plugin is changed when EITHER the plugin button or dropdown or clicked or changed $("#pluginDD,#pluginOptionsBtn").bind('change click', function() { // set form fields as vars in js var pid = <?=$pid;?>; var cid = <?=$contentid;?>; var pDD = $("#pluginDD").val(); // add post vars (must use JSON) to be sent into the js var 'dataString' var dataString = {plugin_options: true, pageid: pid, contentid: cid, pluginDD: pDD }; // include the plugin option page inside the container, with the required values already added into the query string $("#pluginOptionsContainer").load("/admin/inc/edit/content/plugin_options.php#pluginTop", dataString); // add this to stop page refresh return false; }); // end submit function }); // end main function }); // on DOM load Any help would be GREATLY appreciated! I hate IE!

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  • Where to store front-end data for "object calculator"

    - by Justin Grahn
    I recently have completed a language library that acts as a giant filter for food items, and flows a bit like this :Products -> Recipes -> MenuItems -> Meals and finally, upon submission, creates an Order. I have also completed a database structure that stores all the pertinent information to each class, and seems to fit my needs. The issue I'm having is linking the two. I imagined all of the information being local to each instance of the product, where there exists one backend user who edits and manipulates data, and multiple front end users who select their Meal(s) to create an Order. Ideally, all of the front end users would have all of this information stored locally within the library, and would update the library on startup from a database. How should I go about storing the data so that I can load it into the library every time the user opens the application? Do I package a database onboard and just load and populate every time? The only method I can currently conceive of doing this, even if I only have 500 possible Product objects, would require me to foreach the list for every Product that I need to match to a Recipe and so on and so forth every time I relaunch the program, which seems like a lot of wasteful loading. Here is a general flow of my architecture: Products: public class Product : IPortionable { public Product(string n, uint pNumber = 0) { name = n; productNumber = pNumber; } public string name { get; set; } public uint productNumber { get; set; } } Recipes: public Recipe(string n, decimal yieldAmt, Volume.Unit unit) { name = n; yield = new Volume(yieldAmt, unit); yield.ConvertUnit(); } /// <summary> /// Creates a new ingredient object /// </summary> /// <param name="n">Name</param> /// <param name="yieldAmt">Recipe Yield</param> /// <param name="unit">Unit of Yield</param> public Recipe(string n, decimal yieldAmt, Weight.Unit unit) { name = n; yield = new Weight(yieldAmt, unit); } public Recipe(Recipe r) { name = r.name; yield = r.yield; ingredients = r.ingredients; } public string name { get; set; } public IMeasure yield; public Dictionary<IPortionable, IMeasure> ingredients = new Dictionary<IPortionable,IMeasure>(); MenuItems: public abstract class MenuItem : IScalable { public static string title = null; public string name { get; set; } public decimal maxPortionSize { get; set; } public decimal minPortionSize { get; set; } public Dictionary<IPortionable, IMeasure> ingredients = new Dictionary<IPortionable, IMeasure>(); and Meal: public class Meal { public Meal(int guests) { guestCount = guests; } public int guestCount { get; private set; } //TODO: Make a new MainCourse class that holds pasta and Entree public Dictionary<string, int> counts = new Dictionary<string, int>(){ {MainCourse.title, 0}, {Side.title , 0}, {Appetizer.title, 0} }; public List<MenuItem> items = new List<MenuItem>(); The Database just stores and links each of these basic names and amounts together usings ID's (RecipeID, ProductID and MenuItemID)

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  • MySQL Memory usage

    - by Rob Stevenson-Leggett
    Our MySQL server seems to be using a lot of memory. I've tried looking for slow queries and queries with no index and have halved the peak CPU usage and Apache memory usage but the MySQL memory stays constantly at 2.2GB (~51% of available memory on the server). Here's the graph from Plesk. Running top in the SSH window shows the same figures. Does anyone have any ideas on why the memory usage is constant like this and not peaks and troughs with usage of the app? Here's the output of the MySQL Tuning Primer script: -- MYSQL PERFORMANCE TUNING PRIMER -- - By: Matthew Montgomery - MySQL Version 5.0.77-log x86_64 Uptime = 1 days 14 hrs 4 min 21 sec Avg. qps = 22 Total Questions = 3059456 Threads Connected = 13 Warning: Server has not been running for at least 48hrs. It may not be safe to use these recommendations To find out more information on how each of these runtime variables effects performance visit: http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html Visit http://www.mysql.com/products/enterprise/advisors.html for info about MySQL's Enterprise Monitoring and Advisory Service SLOW QUERIES The slow query log is enabled. Current long_query_time = 1 sec. You have 6 out of 3059477 that take longer than 1 sec. to complete Your long_query_time seems to be fine BINARY UPDATE LOG The binary update log is NOT enabled. You will not be able to do point in time recovery See http://dev.mysql.com/doc/refman/5.0/en/point-in-time-recovery.html WORKER THREADS Current thread_cache_size = 0 Current threads_cached = 0 Current threads_per_sec = 2 Historic threads_per_sec = 0 Threads created per/sec are overrunning threads cached You should raise thread_cache_size MAX CONNECTIONS Current max_connections = 100 Current threads_connected = 14 Historic max_used_connections = 20 The number of used connections is 20% of the configured maximum. Your max_connections variable seems to be fine. INNODB STATUS Current InnoDB index space = 6 M Current InnoDB data space = 18 M Current InnoDB buffer pool free = 0 % Current innodb_buffer_pool_size = 8 M Depending on how much space your innodb indexes take up it may be safe to increase this value to up to 2 / 3 of total system memory MEMORY USAGE Max Memory Ever Allocated : 2.07 G Configured Max Per-thread Buffers : 274 M Configured Max Global Buffers : 2.01 G Configured Max Memory Limit : 2.28 G Physical Memory : 3.84 G Max memory limit seem to be within acceptable norms KEY BUFFER Current MyISAM index space = 4 M Current key_buffer_size = 7 M Key cache miss rate is 1 : 40 Key buffer free ratio = 81 % Your key_buffer_size seems to be fine QUERY CACHE Query cache is supported but not enabled Perhaps you should set the query_cache_size SORT OPERATIONS Current sort_buffer_size = 2 M Current read_rnd_buffer_size = 256 K Sort buffer seems to be fine JOINS Current join_buffer_size = 132.00 K You have had 16 queries where a join could not use an index properly You should enable "log-queries-not-using-indexes" Then look for non indexed joins in the slow query log. If you are unable to optimize your queries you may want to increase your join_buffer_size to accommodate larger joins in one pass. Note! This script will still suggest raising the join_buffer_size when ANY joins not using indexes are found. OPEN FILES LIMIT Current open_files_limit = 1024 files The open_files_limit should typically be set to at least 2x-3x that of table_cache if you have heavy MyISAM usage. Your open_files_limit value seems to be fine TABLE CACHE Current table_cache value = 64 tables You have a total of 426 tables You have 64 open tables. Current table_cache hit rate is 1% , while 100% of your table cache is in use You should probably increase your table_cache TEMP TABLES Current max_heap_table_size = 16 M Current tmp_table_size = 32 M Of 15134 temp tables, 9% were created on disk Effective in-memory tmp_table_size is limited to max_heap_table_size. Created disk tmp tables ratio seems fine TABLE SCANS Current read_buffer_size = 128 K Current table scan ratio = 2915 : 1 read_buffer_size seems to be fine TABLE LOCKING Current Lock Wait ratio = 1 : 142213 Your table locking seems to be fine The app is a facebook game with about 50-100 concurrent users. Thanks, Rob

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  • PHP.ini does not load

    - by Jonathan Park
    Ok this is probably just me not knowing enough about php but here it goes. I'm on Ubuntu Hardy. I have a custom compiled version of PHP which I have compiled with these parameters. ./configure --enable-soap --with-zlib --with-mysql --with-apxs2=[correct path] --with-config-file-path=[correct path] --with-mysqli --with-curlwrappers --with-curl --with-mcrypt I have used the command pecl install pecl_http to install the http.so extension. It is in the correct module directory for my php.ini. My php.ini is loading and I can change things within the ini and effect php. I have included the extension=http.so line in my php.ini. That worked fine. Until I added these compilation options in order to add imap --with-openssl --with-kerberos --with-imap --with-imap-ssl Which failed because I needed the c-client library which I fixed by apt-get install libc-client-dev After which php compiles fine and I have working imap support, woo. HOWEVER, now all my calls to HttpRequest which is part of the pecl_http extention in http.so result in Fatal error: Class 'HttpRequest' not found errors. I figure the http.so module is no longer loading for one reason or another but I cannot find any errors showing the reason. You might say "Have you tried undoing the new imap setup?" To which I will answer. Yes I have. I directly undid all my config changes and uninstalled the c-client library and I still can't get it to work. I thought that's weird... I have made no changes that would have resulted in this issue. After looking at that I have also discovered that not only is the http extension no longer loading but all my extensions loaded via php.ini are no longer loading. Can someone at least give me some further debugging steps? So far I have tried enabling all errors including startup errors in my php.ini which works for other errors, but I'm not seeing any startup errors either on command line or via apache. And yet again the php.ini appears to be being parsed given that if I run php_info() I get settings that are in the php.ini. Edit it appears that only some of the php.ini settings are being listened to. Is there a way to test my php.ini? Edit Edit It appears I am mistaken again and the php.ini is not being loaded at all any longer. However, If I run php_info() I get that it's looking for my php.ini in the correct location. Edit Edit Edit My config is at the config file path location below but it says no config file loaded. WTF Permission issue? It is currently 644 so everyone should be able to read it if not write it. I tried making it 777 and that didn't work. Configuration File (php.ini) Path /etc/php.ini Loaded Configuration File (none) Edit Edit Edit Edit By loading the ini on the command line using the -c command I am able to run my files and using -m shows that my modules load So nothing is wrong with the php.ini

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  • Linux software RAID6: rebuild slow

    - by Ole Tange
    I am trying to find the bottleneck in the rebuilding of a software raid6. ## Pause rebuilding when measuring raw I/O performance # echo 1 > /proc/sys/dev/raid/speed_limit_min # echo 1 > /proc/sys/dev/raid/speed_limit_max ## Drop caches so that does not interfere with measuring # sync ; echo 3 | tee /proc/sys/vm/drop_caches >/dev/null # time parallel -j0 "dd if=/dev/{} bs=256k count=4000 | cat >/dev/null" ::: sdbd sdbc sdbf sdbm sdbl sdbk sdbe sdbj sdbh sdbg 4000+0 records in 4000+0 records out 1048576000 bytes (1.0 GB) copied, 7.30336 s, 144 MB/s [... similar for each disk ...] # time parallel -j0 "dd if=/dev/{} skip=15000000 bs=256k count=4000 | cat >/dev/null" ::: sdbd sdbc sdbf sdbm sdbl sdbk sdbe sdbj sdbh sdbg 4000+0 records in 4000+0 records out 1048576000 bytes (1.0 GB) copied, 12.7991 s, 81.9 MB/s [... similar for each disk ...] So we can read sequentially at 140 MB/s in the outer tracks and 82 MB/s in the inner tracks on all the drives simultaneously. Sequential write performance is similar. This would lead me to expect a rebuild speed of 82 MB/s or more. # echo 800000 > /proc/sys/dev/raid/speed_limit_min # echo 800000 > /proc/sys/dev/raid/speed_limit_max # cat /proc/mdstat md2 : active raid6 sdbd[10](S) sdbc[9] sdbf[0] sdbm[8] sdbl[7] sdbk[6] sdbe[11] sdbj[4] sdbi[3](F) sdbh[2] sdbg[1] 27349121408 blocks super 1.2 level 6, 128k chunk, algorithm 2 [9/8] [UUU_UUUUU] [=========>...........] recovery = 47.3% (1849905884/3907017344) finish=855.9min speed=40054K/sec But we only get 40 MB/s. And often this drops to 30 MB/s. # iostat -dkx 1 sdbc 0.00 8023.00 0.00 329.00 0.00 33408.00 203.09 0.70 2.12 1.06 34.80 sdbd 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sdbe 13.00 0.00 8334.00 0.00 33388.00 0.00 8.01 0.65 0.08 0.06 47.20 sdbf 0.00 0.00 8348.00 0.00 33388.00 0.00 8.00 0.58 0.07 0.06 48.00 sdbg 16.00 0.00 8331.00 0.00 33388.00 0.00 8.02 0.71 0.09 0.06 48.80 sdbh 961.00 0.00 8314.00 0.00 37100.00 0.00 8.92 0.93 0.11 0.07 54.80 sdbj 70.00 0.00 8276.00 0.00 33384.00 0.00 8.07 0.78 0.10 0.06 48.40 sdbk 124.00 0.00 8221.00 0.00 33380.00 0.00 8.12 0.88 0.11 0.06 47.20 sdbl 83.00 0.00 8262.00 0.00 33380.00 0.00 8.08 0.96 0.12 0.06 47.60 sdbm 0.00 0.00 8344.00 0.00 33376.00 0.00 8.00 0.56 0.07 0.06 47.60 iostat says the disks are not 100% busy (but only 40-50%). This fits with the hypothesis that the max is around 80 MB/s. Since this is software raid the limiting factor could be CPU. top says: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 38520 root 20 0 0 0 0 R 64 0.0 2947:50 md2_raid6 6117 root 20 0 0 0 0 D 53 0.0 473:25.96 md2_resync So md2_raid6 and md2_resync are clearly busy taking up 64% and 53% of a CPU respectively, but not near 100%. The chunk size (128k) of the RAID was chosen after measuring which chunksize gave the least CPU penalty. If this speed is normal: What is the limiting factor? Can I measure that? If this speed is not normal: How can I find the limiting factor? Can I change that?

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  • Parallel processing slower than sequential?

    - by zebediah49
    EDIT: For anyone who stumbles upon this in the future: Imagemagick uses a MP library. It's faster to use available cores if they're around, but if you have parallel jobs, it's unhelpful. Do one of the following: do your jobs serially (with Imagemagick in parallel mode) set MAGICK_THREAD_LIMIT=1 for your invocation of the imagemagick binary in question. By making Imagemagick use only one thread, it slows down by 20-30% in my test cases, but meant I could run one job per core without issues, for a significant net increase in performance. Original question: While converting some images using ImageMagick, I noticed a somewhat strange effect. Using xargs was significantly slower than a standard for loop. Since xargs limited to a single process should act like a for loop, I tested that, and found it to be about the same. Thus, we have this demonstration. Quad core (AMD Athalon X4, 2.6GHz) Working entirely on a tempfs (16g ram total; no swap) No other major loads Results: /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 1 convert -auto-level real 0m3.784s user 0m2.240s sys 0m0.230s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 2 convert -auto-level real 0m9.097s user 0m28.020s sys 0m0.910s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 10 convert -auto-level real 0m9.844s user 0m33.200s sys 0m1.270s Can anyone think of a reason why running two instances of this program takes more than twice as long in real time, and more than ten times as long in processor time to complete the same task? After that initial hit, more processes do not seem to have as significant of an effect. I thought it might have to do with disk seeking, so I did that test entirely in ram. Could it have something to do with how Convert works, and having more than one copy at once means it cannot use processor cache as efficiently or something? EDIT: When done with 1000x 769KB files, performance is as expected. Interesting. /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 1 convert -auto-level real 3m37.679s user 5m6.980s sys 0m6.340s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 1 convert -auto-level real 3m37.152s user 5m6.140s sys 0m6.530s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 2 convert -auto-level real 2m7.578s user 5m35.410s sys 0m6.050s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 4 convert -auto-level real 1m36.959s user 5m48.900s sys 0m6.350s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 10 convert -auto-level real 1m36.392s user 5m54.840s sys 0m5.650s

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  • (Unity)Getting a mirrored mesh from my data structure

    - by Steve
    Here's the background: I'm in the beginning stages of an RTS game in Unity. I have a procedurally generated terrain with a perlin-noise height map, as well as a function to generate a river. The problem is that the graphical creation of the map is taking the data structure of the map and rotating it by 180 degrees. I noticed this problem when i was creating my rivers. I would set the River's height to flat, and noticed that the actual tiles that were flat in the graphical representation were flipped and mirrored. Here's 3 screenshots of the map from different angles: http://imgur.com/a/VLHHq As you can see, if you flipped (graphically) the river by 180 degrees on the z axis, it would fit where the terrain is flattened. I have a suspicion it is being caused by a misunderstanding on my part of how vertices work. Alas, here is a snippet of the code that is used: This code here creates a new array of Tile objects, which hold the information for each tile, including its type, coordinate, height, and it's 4 vertices public DTileMap (int size_x, int size_y) { this.size_x = size_x; this.size_y = size_y; //Initialize Map_Data Array of Tile Objects map_data = new Tile[size_x, size_y]; for (int j = 0; j < size_y; j++) { for (int i = 0; i < size_x; i++) { map_data [i, j] = new Tile (); map_data[i,j].coordinate.x = (int)i; map_data[i,j].coordinate.y = (int)j; map_data[i,j].vertices[0] = new Vector3 (i * GTileMap.TileMap.tileSize, map_data[i,j].Height, -j * GTileMap.TileMap.tileSize); map_data[i,j].vertices[1] = new Vector3 ((i+1) * GTileMap.TileMap.tileSize, map_data[i,j].Height, -(j) * GTileMap.TileMap.tileSize); map_data[i,j].vertices[2] = new Vector3 (i * GTileMap.TileMap.tileSize, map_data[i,j].Height, -(j-1) * GTileMap.TileMap.tileSize); map_data[i,j].vertices[3] = new Vector3 ((i+1) * GTileMap.TileMap.tileSize, map_data[i,j].Height, -(j-1) * GTileMap.TileMap.tileSize); } } This code sets the river tiles to height 0 foreach (Tile t in map_data) { if (t.realType == "Water") { t.vertices[0].y = 0f; t.vertices[1].y = 0f; t.vertices[2].y = 0f; t.vertices[3].y = 0f; } } And below is the code to generate the actual graphics from the data: public void BuildMesh () { DTileMap.DTileMap map = new DTileMap.DTileMap (size_x, size_z); int numTiles = size_x * size_z; int numTris = numTiles * 2; int vsize_x = size_x + 1; int vsize_z = size_z + 1; int numVerts = vsize_x * vsize_z; // Generate the mesh data Vector3[] vertices = new Vector3[ numVerts ]; Vector3[] normals = new Vector3[numVerts]; Vector2[] uv = new Vector2[numVerts]; int[] triangles = new int[ numTris * 3 ]; int x, z; for (z=0; z < vsize_z; z++) { for (x=0; x < vsize_x; x++) { normals [z * vsize_x + x] = Vector3.up; uv [z * vsize_x + x] = new Vector2 ((float)x / size_x, 1f - (float)z / size_z); } } for (z=0; z < vsize_z; z+=1) { for (x=0; x < vsize_x; x+=1) { if (x == vsize_x - 1 && z == vsize_z - 1) { vertices [z * vsize_x + x] = DTileMap.DTileMap.map_data [x - 1, z - 1].vertices [3]; } else if (z == vsize_z - 1) { vertices [z * vsize_x + x] = DTileMap.DTileMap.map_data [x, z - 1].vertices [2]; } else if (x == vsize_x - 1) { vertices [z * vsize_x + x] = DTileMap.DTileMap.map_data [x - 1, z].vertices [1]; } else { vertices [z * vsize_x + x] = DTileMap.DTileMap.map_data [x, z].vertices [0]; vertices [z * vsize_x + x+1] = DTileMap.DTileMap.map_data [x, z].vertices [1]; vertices [(z+1) * vsize_x + x] = DTileMap.DTileMap.map_data [x, z].vertices [2]; vertices [(z+1) * vsize_x + x+1] = DTileMap.DTileMap.map_data [x, z].vertices [3]; } } } } for (z=0; z < size_z; z++) { for (x=0; x < size_x; x++) { int squareIndex = z * size_x + x; int triOffset = squareIndex * 6; triangles [triOffset + 0] = z * vsize_x + x + 0; triangles [triOffset + 2] = z * vsize_x + x + vsize_x + 0; triangles [triOffset + 1] = z * vsize_x + x + vsize_x + 1; triangles [triOffset + 3] = z * vsize_x + x + 0; triangles [triOffset + 5] = z * vsize_x + x + vsize_x + 1; triangles [triOffset + 4] = z * vsize_x + x + 1; } } // Create a new Mesh and populate with the data Mesh mesh = new Mesh (); mesh.vertices = vertices; mesh.triangles = triangles; mesh.normals = normals; mesh.uv = uv; // Assign our mesh to our filter/renderer/collider MeshFilter mesh_filter = GetComponent<MeshFilter> (); MeshCollider mesh_collider = GetComponent<MeshCollider> (); mesh_filter.mesh = mesh; mesh_collider.sharedMesh = mesh; calculateMeshTangents (mesh); BuildTexture (map); } If this looks familiar to you, its because i got most of it from Quill18. I've been slowly adapting it for my uses. And please include any suggestions you have for my code. I'm still in the very early prototyping stage.

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  • Getting a mirrored mesh from my data structure

    - by Steve
    Here's the background: I'm in the beginning stages of an RTS game in Unity. I have a procedurally generated terrain with a perlin-noise height map, as well as a function to generate a river. The problem is that the graphical creation of the map is taking the data structure of the map and rotating it by 180 degrees. I noticed this problem when I was creating my rivers. I would set the River's height to flat, and noticed that the actual tiles that were flat in the graphical representation were flipped and mirrored. Here's 3 screenshots of the map from different angles: http://imgur.com/a/VLHHq As you can see, if you flipped (graphically) the river by 180 degrees on the z axis, it would fit where the terrain is flattened. I have a suspicion it is being caused by a misunderstanding on my part of how vertices work. Alas, here is a snippet of the code that is used: This code here creates a new array of Tile objects, which hold the information for each tile, including its type, coordinate, height, and it's 4 vertices public DTileMap (int size_x, int size_y) { this.size_x = size_x; this.size_y = size_y; //Initialize Map_Data Array of Tile Objects map_data = new Tile[size_x, size_y]; for (int j = 0; j < size_y; j++) { for (int i = 0; i < size_x; i++) { map_data [i, j] = new Tile (); map_data[i,j].coordinate.x = (int)i; map_data[i,j].coordinate.y = (int)j; map_data[i,j].vertices[0] = new Vector3 (i * GTileMap.TileMap.tileSize, map_data[i,j].Height, -j * GTileMap.TileMap.tileSize); map_data[i,j].vertices[1] = new Vector3 ((i+1) * GTileMap.TileMap.tileSize, map_data[i,j].Height, -(j) * GTileMap.TileMap.tileSize); map_data[i,j].vertices[2] = new Vector3 (i * GTileMap.TileMap.tileSize, map_data[i,j].Height, -(j-1) * GTileMap.TileMap.tileSize); map_data[i,j].vertices[3] = new Vector3 ((i+1) * GTileMap.TileMap.tileSize, map_data[i,j].Height, -(j-1) * GTileMap.TileMap.tileSize); } } This code sets the river tiles to height 0 foreach (Tile t in map_data) { if (t.realType == "Water") { t.vertices[0].y = 0f; t.vertices[1].y = 0f; t.vertices[2].y = 0f; t.vertices[3].y = 0f; } } And below is the code to generate the actual graphics from the data: public void BuildMesh () { DTileMap.DTileMap map = new DTileMap.DTileMap (size_x, size_z); int numTiles = size_x * size_z; int numTris = numTiles * 2; int vsize_x = size_x + 1; int vsize_z = size_z + 1; int numVerts = vsize_x * vsize_z; // Generate the mesh data Vector3[] vertices = new Vector3[ numVerts ]; Vector3[] normals = new Vector3[numVerts]; Vector2[] uv = new Vector2[numVerts]; int[] triangles = new int[ numTris * 3 ]; int x, z; for (z=0; z < vsize_z; z++) { for (x=0; x < vsize_x; x++) { normals [z * vsize_x + x] = Vector3.up; uv [z * vsize_x + x] = new Vector2 ((float)x / size_x, 1f - (float)z / size_z); } } for (z=0; z < vsize_z; z+=1) { for (x=0; x < vsize_x; x+=1) { if (x == vsize_x - 1 && z == vsize_z - 1) { vertices [z * vsize_x + x] = DTileMap.DTileMap.map_data [x - 1, z - 1].vertices [3]; } else if (z == vsize_z - 1) { vertices [z * vsize_x + x] = DTileMap.DTileMap.map_data [x, z - 1].vertices [2]; } else if (x == vsize_x - 1) { vertices [z * vsize_x + x] = DTileMap.DTileMap.map_data [x - 1, z].vertices [1]; } else { vertices [z * vsize_x + x] = DTileMap.DTileMap.map_data [x, z].vertices [0]; vertices [z * vsize_x + x+1] = DTileMap.DTileMap.map_data [x, z].vertices [1]; vertices [(z+1) * vsize_x + x] = DTileMap.DTileMap.map_data [x, z].vertices [2]; vertices [(z+1) * vsize_x + x+1] = DTileMap.DTileMap.map_data [x, z].vertices [3]; } } } } for (z=0; z < size_z; z++) { for (x=0; x < size_x; x++) { int squareIndex = z * size_x + x; int triOffset = squareIndex * 6; triangles [triOffset + 0] = z * vsize_x + x + 0; triangles [triOffset + 2] = z * vsize_x + x + vsize_x + 0; triangles [triOffset + 1] = z * vsize_x + x + vsize_x + 1; triangles [triOffset + 3] = z * vsize_x + x + 0; triangles [triOffset + 5] = z * vsize_x + x + vsize_x + 1; triangles [triOffset + 4] = z * vsize_x + x + 1; } } // Create a new Mesh and populate with the data Mesh mesh = new Mesh (); mesh.vertices = vertices; mesh.triangles = triangles; mesh.normals = normals; mesh.uv = uv; // Assign our mesh to our filter/renderer/collider MeshFilter mesh_filter = GetComponent<MeshFilter> (); MeshCollider mesh_collider = GetComponent<MeshCollider> (); mesh_filter.mesh = mesh; mesh_collider.sharedMesh = mesh; calculateMeshTangents (mesh); BuildTexture (map); } If this looks familiar to you, its because i got most of it from Quill18. I've been slowly adapting it for my uses. And please include any suggestions you have for my code. I'm still in the very early prototyping stage.

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  • Building an ASP.Net 4.5 Web forms application - part 3

    - by nikolaosk
    ?his is the third post in a series of posts on how to design and implement an ASP.Net 4.5 Web Forms store that sells posters on line.Make sure you read the first and second post in the series.In this new post I will keep making some minor changes in the Markup,CSS and Master page but there is no point in presenting them here. They are just minor changes to reflect the content and layout I want my site to have. What I need to do now is to add some more pages and start displaying properly data from my database.Having said that I will show you how to add more pages to the web application and present data.1) Launch Visual Studio and open your solution where your project lives2) Add a new web form item on the project.Make sure you include the Master Page.Name it PosterList.aspxHave a look at the picture below 3) In Site.Master add the following link to the master page so the user can navigate to it.You should only add the line in bold     <nav>                    <ul id="menu">                        <li><a runat="server" href="~/">Home</a></li>                        <li><a runat="server" href="~/About.aspx">About</a></li>                        <li><a runat="server" href="~/Contact.aspx">Contact</a></li>                          <li><a href="http://weblogs.asp.net/PosterList.aspx">Posters</a></li>                    </ul>                </nav> 4) Now we need to display categories from the database. We will use a ListView web server control.Inside the <div id="body"> add the following code. <section id="postercat">       <asp:ListView ID="categoryList"                          ItemType="PostersOnLine.DAL.PosterCategory"                         runat="server"                        SelectMethod="GetPosterCategories" >                        <ItemTemplate>                                                    <a href="http://weblogs.asp.net/PosterList.aspx?id=<%#: Item.PosterCategoryID %>">                            <%#: Item.PosterCategoryName %>                            </a>                            </b>                        </ItemTemplate>                        <ItemSeparatorTemplate> ----- </ItemSeparatorTemplate>                    </asp:ListView>             </section>        Let me explain what the code does.We have the ListView control that displays each poster category's name.It also includes a link to the PosterList.aspx page with a query-string value containing the ID of the category. We set the ItemType property in the ListView to the PosterCategory entity .We set the SelectMethod property to a method GetPosterCategories. Now we can use the data-binding expression Item (<%#: %>) that is available within the ItemTemplate . 5) Now we must write the GetPosterCategories method. In the Site.Master.cs file add the following code.This is just a simple function that returns the poster categories.        public IQueryable<PosterCategory> GetPosterCategories()        {            PosterContext ctx = new PosterContext();            IQueryable<PosterCategory> query = ctx.PosterCategories;            return query;        } 6) I just changed a few things in the Site.css file to style the new <section> HTML element that includes the ListView control.#postercat {  text-align: center; background-color: #85C465;}     7) Build and run your application. Everything should compile now. Have a look at the picture below.The links (poster categories) appear.?he ListView control when is called during the page lifecycle calls the GetPosterCategories() method.The method is executed and returns the poster categories that are bound to the control.  When I click on any of the poster category links, the PosterList.aspx page will show up with the appropriate Id that is the PosterCategoryID.Have a look at the picture below  We will add more data-enabled controls in the next post in the PosterList.aspx page. Some people are complaining the posts are too long so I will keep them short. Hope it helps!!!

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  • Performance of Silverlight Datagrid in Silverlight 3 vs Silverlight 4 on a mac

    - by Simon
    I'm using Silverlight Beta 4 for a LOB application. After finding out today that I'll have to wait perhaps 4 months to be able to develop with SL4 on Visual Studio 2010 I'm thinking I need to downgrade my application to SL3 but thats another question. The problem is I'm noticing absolutely abismal performance for simple datagrids that work just fine on a PC when I'm running on a Mac. These grids contain only 5-10 columns and maybe 50 rows. Paging up and down takes about 1-2 seconds sometimes. I would appreciate anybody's experience in which of the following is the best solution: reverting to Silverlight 3 and hoping DataGrid is faster switching to 3rd party datagrid such as Telerik forgetting silverlight altogether I was hoping that possibly SL4 runtime might be updated but that won't happen probably for 3-4 months. Just a reminder - this is specifically a mac issue. Performance on my PC while slightly slow to populate the grid initially is fine.

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  • Unable to load UIView with initWithNibName in Apple SDK 3.1.3

    - by James Foster
    I am trying to load my UIViewController and corresponding UIView programmatically in the AppDelegate class. I have the following in the applicationDidFinishLaunchingMethod of the AppDelegate class: (void)applicationDidFinishLaunching:(UIApplication *)application { NSLog(@"--- AppDelegate applicationDidFinishLaunching Start"); // Override point for customization after application launch //MainController *controller = [[MainController alloc] initWithNibName:@"MainView" bundle:nil]; MainController2 *controller = [[MainController2 alloc] initWithNibName:@"MainView2" bundle:nil]; if (controller.view == nil) { NSLog(@"--- controller view is nil!!!!!!"); } [window addSubview:controller.view]; [window makeKeyAndVisible]; NSLog(@"--- AppDelegate applicationDidFinishLaunching End"); } Basically the view in the viewController doesn't load and when the application launches, it just shows the blank window. What is funny is that it worked before and then just stopped working. I am wondering if this is a bug in iPhone SDK 3.1.3??? This is a really annoying issue, and I was quite a ways along in a new project when I started having this problem and had to start over with a blank project and copy over all of my resources, when it started happening again... I have uninstalled iPhone OS 3.1.3 and reinstalled and the problem prevails... I also created a second UIViewController class and corresponding nib which DOES LOAD just fine... I am not sure why one works and the other doesn't it... You can download a sample project which demonstrates this issue at the following link: http://www.mediafire.com/?nmhnmhbeyki To switch back and forth between the working/nonworking UIViewController and UIView simply comment comment/comment out the initWithNibLine lines in the AppDelegate and the corresponding #import "MainController.h" statements in the appdelegate.h file... Any ideas??? The sample project I have linked to isolates the problem in as few files/lines of code as possible... I appreciate any help you might be able to provide. Thanks, James

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  • VS 2010 VSTO Add in for EXCEL 2007 Won't load

    - by Erick
    Hi everyone, We have an application that is built with Excel as the front end using the Office object model. We were using a C++ shim to load it as a COM add in for Excel 2003, but I've updated it to use the latest VSTO for Excel 2007. I've also been using VS 2010 for the latest version. The problem is that everything works great on my dev machine in debugger mode as well as just launching Excel 2007, but I cannot get it to run on any other machine (my current target machine is Win7, development is XP). I've created a ClickOnce deployment of the Addin, and I can see it in the list of COM Addins, but when I check on it to load it nothing happens. I re-open the Addins manager and it is un-checked. I've also tried setting in in the registry, but as soon as I run it, it sets the registry back to do not load. I've tried everything I can think of and searched all over the web but no dice. Any help would be appreciated!

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  • .NET C#: WebBrowser control Navigate() does not load targeted URL

    - by Dave
    Hey guys, I'm trying to programmatically load a web page via the WebBrowser control with the intent of testing the page & it's JavaScript functions. Basically, I want to compare the HTML & JavaScript run through this control against a known output to ascertain whether there is a problem. However, I'm having trouble simply creating and navigating the WebBrowser control. The code below is intended to load the HtmlDocument into the WebBrowser.Document property: WebBrowser wb = new WebBrowser(); wb.AllowNavigation = true; wb.Navigate("http://www.google.com/"); When examining the web browser's state via Intellisense after Navigate() runs, the WebBrowser.ReadyState is 'Uninitialized', WebBrowser.Document = null, and it overall appears completely unaffected by my call. On a contextual note, I'm running this control outside of a Windows form object: I do not need to load a window or actually look at the page. Requirements dictate the need to simply execute the page's JavaScript and examine the resultant HTML. Any suggestions are greatly appreciated, thanks!

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  • Load richtextbox from memorystream. WPF/VB>NET

    - by Peter
    Hi, I have some trouble with loading a richtextbox from a memorystream. I have some data in a database table stored as a byte array, I convert it to a string and load it into a memorystream and then I want to load that memory stream in the richtextbox. The application breaks on Dim tr As New TextRange(rtbTemplate.Document.ContentStart, rtbTemplate.Document.ContentEnd) though. Code for getting the data from the database Dim TemplateData As Byte() = TemplateDataTableInstance.Rows(0).Item("TemplateData") Dim strTemplateData As String Dim enc As New System.Text.UTF8Encoding() strTemplateData = enc.GetString(TemplateData) ' I put a messagebox here to check if I get the data I want and I do Now, how do I sort out the rest? I have Dim strDataFormat As String = DataFormats.Rtf Using ms As New MemoryStream(strTemplateData) Dim tr As New TextRange(rtbTemplate.Document.ContentStart, rtbTemplate.Document.ContentEnd) tr.Load(ms, strDataFormat) End Using and my richtextbox in xaml <RichTextBox x:Name="rtbLetter"> <RichTextBox.Resources> <Style TargetType="{x:Type Paragraph}"> <Setter Property="Margin" Value="0"/> </Style> </RichTextBox.Resources> <FlowDocument FontSize="12" FontFamily="Times New Roman"> </FlowDocument> </RichTextBox> Any help is appreciated.

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  • Difference between DataTable.Load() and DataTable = dataSet.Tables[];

    - by subbu
    Hi All , I have a doubt i use the following piece of code get data from a SQLlite data base and Load it into a data table "SQLiteConnection cnn = new SQLiteConnection("Data Source=" + path); cnn.Open(); SQLiteCommand mycommand = new SQLiteCommand(cnn); string sql = "select Company,Phone,Email,Address,City,State,Zip,Country,Fax,Web from RecordsTable"; mycommand.CommandText = sql; SQLiteDataReader reader = mycommand.ExecuteReader(); dt.Load(reader); reader.Close(); cnn.Close();" In some cases when I try to load it Gives me "Failed to enable constraints exception" But when I tried this below given piece of code for same table and same set of records it worked "SQLiteConnection ObjConnection = new SQLiteConnection("Data Source=" + path); SQLiteCommand ObjCommand = new SQLiteCommand("select Company,Phone,Email,Address,City,State,Zip,Country,Fax,Web from RecordsTable", ObjConnection); ObjCommand.CommandType = CommandType.Text; SQLiteDataAdapter ObjDataAdapter = new SQLiteDataAdapter(ObjCommand); DataSet dataSet = new DataSet(); ObjDataAdapter.Fill(dataSet, "RecordsTable"); dt = dataSet.Tables["RecordsTable"]; " Can any one tell me what is the difference between two

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  • DotNetOpenAuth RelayParty not working on load balanced cluster

    - by Garth
    We're trying to move an ASP.NET MVC application, which uses DotNetOpenAuth OpenID Version 3.4.1, from a single server web garden to a physical server cluster held behind a hardware load balancer. Our old setup (OpenID RP working): Browser = SHTTP = Server = WebGarden = Nonce/Session Store Our new setup (OpenID RP not working): Browser = SHTTP = Load Balancer = HTTP = Cluster Node = WebGarden = Nonce/Session Store DB When we authenticate with the new setup we are correctly redirected to the OpenID Provider but after authenticated we are redirected back to our cluster (relay party) and get the following exception: Exception DotNetOpenAuth.Messaging.ProtocolException: Redirects on POST requests that are to untrusted servers is not supported. at DotNetOpenAuth.Messaging.ErrorUtilities.VerifyProtocol(Boolean condition, String message, Object[] args) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\Messaging\ErrorUtilities.cs:line 235 at DotNetOpenAuth.Messaging.UntrustedWebRequestHandler.GetResponse(HttpWebRequest request, DirectWebRequestOptions options) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\Messaging\UntrustedWebRequestHandler.cs:line 258 at DotNetOpenAuth.OpenId.ChannelElements.OpenIdChannel.GetDirectResponse(HttpWebRequest webRequest) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\OpenId\ChannelElements\OpenIdChannel.cs:line 277 at DotNetOpenAuth.Messaging.Channel.RequestCore(IDirectedProtocolMessage request) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\Messaging\Channel.cs:line 542 at DotNetOpenAuth.Messaging.Channel.Request(IDirectedProtocolMessage requestMessage) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\Messaging\Channel.cs:line 425 at DotNetOpenAuth.Messaging.Channel.Request[TResponse](IDirectedProtocolMessage requestMessage) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\Messaging\Channel.cs:line 405 at DotNetOpenAuth.OpenId.ChannelElements.SigningBindingElement.ProcessIncomingMessage(IProtocolMessage message) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\OpenId\ChannelElements\SigningBindingElement.cs:line 154 at DotNetOpenAuth.Messaging.Channel.ProcessIncomingMessage(IProtocolMessage message) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\Messaging\Channel.cs:line 992 at DotNetOpenAuth.OpenId.ChannelElements.OpenIdChannel.ProcessIncomingMessage(IProtocolMessage message) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\OpenId\ChannelElements\OpenIdChannel.cs:line 172 at DotNetOpenAuth.Messaging.Channel.ReadFromRequest(HttpRequestInfo httpRequest) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\Messaging\Channel.cs:line 386 at DotNetOpenAuth.OpenId.RelyingParty.OpenIdRelyingParty.GetResponse(HttpRequestInfo httpRequestInfo) in c:\TeamCity\buildAgent\work\bf9e2ca68b75a334\src\DotNetOpenAuth\OpenId\RelyingParty\OpenIdRelyingParty.cs:line 501 We have added a machines involved into the trusted machine list and turned off requires ssl but it makes no difference. We even tried removing out nonce store and using a stateless connection, but that didn't work either. We always get the same error. We suspected the issue is arising as a result of the cluster node having a different IP from the load balancer when it connects to the OpenID Provider, but we're not sure. Any ideas?

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  • Reloading an external element (via jQuery's .load) without impact on same-named host elements on sam

    - by Martin Pescador
    Hello together! [First, I'm an absolute beginner. I tried to express myself as good as I could - please correct me on any issue... Now: I have the following problem:] I am loading a div element, which class always is ".gallery" from a couple of pages (in this example "the page index.php?page=orange") into another page's div (in this case with the ID "orange") using the following code: $("#orange").load("http://example.com/index.php?page=orange .gallery"); Each div.gallery I load in, is a set of a few images. Between them, you can switch (there are "previous"- and "next"-links in ".imgnavi"). $(".imgnavi a").live("click", function(ev) { ev.preventDefault(); ev.stopPropagation(); $(".gallery").load($(this).attr("href")); return false; }) What happens now: Loading the different div.gallery into the new page is no problem, but as soon as I start to navigate inside those divs (each div is a little gallery, where you can switch between images), the div.gallery I am switching in is suddenly loaded into EVERY other div.gallery in the document! How do I prevent that?

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  • Sync Vs. Async Sockets Performance in C#

    - by Michael Covelli
    Everything that I read about sockets in .NET says that the asynchronous pattern gives better performance (especially with the new SocketAsyncEventArgs which saves on the allocation). I think this makes sense if we're talking about a server with many client connections where its not possible to allocate one thread per connection. Then I can see the advantage of using the ThreadPool threads and getting async callbacks on them. But in my app, I'm the client and I just need to listen to one server sending market tick data over one tcp connection. Right now, I create a single thread, set the priority to Highest, and call Socket.Receive() with it. My thread blocks on this call and wakes up once new data arrives. If I were to switch this to an async pattern so that I get a callback when there's new data, I see two issues The threadpool threads will have default priority so it seems they will be strictly worse than my own thread which has Highest priority. I'll still have to send everything through a single thread at some point. Say that I get N callbacks at almost the same time on N different threadpool threads notifying me that there's new data. The N byte arrays that they deliver can't be processed on the threadpool threads because there's no guarantee that they represent N unique market data messages because TCP is stream based. I'll have to lock and put the bytes into an array anyway and signal some other thread that can process what's in the array. So I'm not sure what having N threadpool threads is buying me. Am I thinking about this wrong? Is there a reason to use the Async patter in my specific case of one client connected to one server?

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