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  • Determining Performance Limits

    - by JeffV
    I have a number of windows processes that pass messages between them hat a high rate using tcp to local host. Aside from testing on actual hardware how can I assess what my hardware limit will be. These applications are not doing CPU intensive work, mostly decomposing and combining messages, scanning over them for special flag in the data etc.. The message size is typically 3k and the rate is typically ~10k messages per second. ~30MB per second between processing stages. There may be 10 or more stages depending. For this type of application, what should I look to for assessing performance? What do I look for in a server performance wise? I am currently running an XEON L5408 with 32 GB ram. But I am assuming cache is more important than actual ram size as I am barely touching the ram.

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  • 8GB Compact Flash Corrupted, Boot Sector Lost ?

    - by robert
    I have an 8GB Kingston compact Flash, and when I insert it into my mac it says that card is unredable and ask me for initialization. If i open Utilty Disk it show a card of 2,2 TB Generic Comact Flash, if I try to initialize that it give me error: POSIX reports: impossible to allocate memory. How i can format that ? There's a way with fdisk or smt to get this card work ? Thanks

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  • Openfire and LDAP issues

    - by clsmith
    Thanks in advance for the help. Has anyone see this issue with openfire? Currently I use Openfire Fedora with Auth using windows 2003 and also use mysql for the database. When I bring up two clients and talk to each other the time is slow between messages. Sometimes it can take between 5-15 minutes for something sent to get to the person (this is with only two people on the openfire server). I ran a tcp dump using port 389 and see that the machine is running thousands of queries against ldap. When i plug it into wireshark I notice that it is transferring the entire contact list or checking on the status of the entire contact list ? When I run debug on openfire itself I am presented with only this small message in the log: 2010.06.08 07:01:17 LdapManager: Starting LDAP search... 2010.06.08 07:01:17 LdapManager: ... search finished 2010.06.08 07:01:17 LdapManager: Creating a DirContext in LdapManager.getContext()... 2010.06.08 07:01:17 LdapManager: Created hashtable with context values, attempting to create context... 2010.06.08 07:01:17 LdapManager: ... context created successfully, returning. 2010.06.08 07:01:17 LdapManager: Trying to find a groups's DN based on it's groupname. cn: Spark agents CLT, Base DN: OU="Hidden",DC="Hidden",DC="net"... 2010.06.08 07:01:17 LdapManager: Creating a DirContext in LdapManager.getContext()... 2010.06.08 07:01:17 LdapManager: Created hashtable with context values, attempting to create context... 2010.06.08 07:01:17 LdapManager: ... context created successfully, returning. 2010.06.08 07:01:17 LdapManager: Starting LDAP search... 2010.06.08 07:01:17 LdapManager: ... search finished 2010.06.08 07:01:17 LdapManager: Trying to find a groups's DN based on it's groupname. cn: Spark agents CLT, Base DN: OU="Hidden",DC="Hidden",DC="net"... 2010.06.08 07:01:17 LdapManager: Creating a DirContext in LdapManager.getContext()... 2010.06.08 07:01:17 LdapManager: Created hashtable with context values, attempting to create context... 2010.06.08 07:01:17 LdapManager: ... context created successfully, returning. 2010.06.08 07:01:17 LdapManager: Starting LDAP search... 2010.06.08 07:01:17 LdapManager: ... search finished I thought this was a configuration on my end and started to look into the cache settings on the openfire webpages. I tweaked the settings as recommend by the pages and still get the same issues. I doesnt seem to cache the contact list or this might be a feature never fixed or implemented. Has anyone gone through this before ? I have searched online and I see others have great experience with openfire with no issues like I have, or is it because noone checked the queries ? For the time being I created a new Domain Controller and moved openfire to that computer so it can run local queries. This seems to help reduce the speed alot, but when I run the server performance manager tool I see that with two people only using that openfire server I run 593.7 request per second. Thanks for your help, if I didnt provide enough data please let me know what you need and I can find it.

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  • Can't seem to disable Java Automatic Update

    - by sbussinger
    I'm just tweaking out my new Windows 7 laptop and wanted to disable the automatic Java updating (and thus kill the silly jusched.exe background process), but I can't seem to get it to actually turn it off. I found the Java Control Panel applet and found the settings on the Update tab that should control it. I can turn them off, apply them, and close the dialog successfully. But if I just open the dialog backup again right away, I see that the changes weren't actually made. I've tried it numerous times and it just doesn't take. What's up with that? I also tried to disable the icon in the system tray and got the same effect. Changing the size of the Temporary Internet Files cache work however. Any ideas? Thanks!

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  • Confused about definition of a 'median' when constructing a kd-Tree

    - by user352636
    Hi there. Im trying to build a kd-tree for searching through a set of points, but am getting confused about the use of 'median' in the wikipedia article. For ease of use, the wikipedia article states the pseudo-code of kd-tree construction as: function kdtree (list of points pointList, int depth) { if pointList is empty return nil; else { // Select axis based on depth so that axis cycles through all valid values var int axis := depth mod k; // Sort point list and choose median as pivot element select median by axis from pointList; // Create node and construct subtrees var tree_node node; node.location := median; node.leftChild := kdtree(points in pointList before median, depth+1); node.rightChild := kdtree(points in pointList after median, depth+1); return node; } } I'm getting confused about the "select median..." line, simply because I'm not quite sure what is the 'right' way to apply a median here. As far as I know, the median of an odd-sized (sorted) list of numbers is the middle element (aka, for a list of 5 things, element number 3, or index 2 in a standard zero-based array), and the median of an even-sized array is the sum of the two 'middle' elements divided by two (aka, for a list of 6 things, the median is the sum of elements 3 and 4 - or 2 and 3, if zero-indexed - divided by 2.). However, surely that definition does not work here as we are working with a distinct set of points? How then does one choose the correct median for an even-sized list of numbers, especially for a length 2 list? I appreciate any and all help, thanks! -Stephen

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  • What contributes to smooth online video streaming?

    - by Wesley
    I had a general question about streaming videos online; in particular, on YouTube. What really is required to smoothly stream videos at 360p or 480p? Then for that HD goodness, what really allows a computer to smoothly stream 720p and 1080p? I'm not too sure whether it's to do with the CPU (speed, # cores, cache size), GPU (chipset, VRAM, memory type) or even HDD (IDE vs SATA). What contributes to the ability to stream regular videos and, furthermore, high-definition videos online?

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  • MySQL query very slow on Amazon RDS but really fast on my laptop?

    - by Luc
    I would love to know if anybody knows why this is happening. i've just migrated over to Amazon RDS for our website and our biggest query which takes .2 seconds to execute on my macbook takes 1.3 seconds to execute on the most expensive RDS instance. Obviously i've disabled query cache (and tested this) on my local computer and both databases are exactly the same. InnoDB, both have the same indexes etc. It's costing us a fortune ($2000 per month) for the fastest RDS instance and i'm losing faith quickly. any ideas?

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  • dependency hell

    - by Delirium tremens
    I'm trying to install empathy. Current version has to be installed from source, but needs a list of things that have to be installed one by one. Previous version is in repository, but blinks (opens, then right after that, closes). Previous version of the previous version: apt-cache search -showpkg empathy shows general empathy information and a telepathy too, but not the rpm file name taking the rpm file name from a Google search result, apt-get install package=empathy-2.30.1-2pclos2010 says package package (twice, really) not found installing apturl, clicking the rpm file link, opening it with apturl, installation gui starts, but fails opening the rpm file with Synaptic doesn't work opening the rpm file with /usr/bin/apt-get doesn't work What now?

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  • How can I remove HTTP headers with .htaccess in Apache?

    - by Daniel Magliola
    I have a website that is sending out "cache-control" and "pragma" HTTP headers for PHP requests. I'm not doing that in the code, so I'm assuming it's some kind of Apache configuration, as suggested by this question (you don't really need to go there for this question's context) I don't have anything in my .htaccess files, so it's gotta be in Apache's configuration itself, but I can't access that, this is a shared hosting, I only have FTP access to my website's directory. Is there any way that I can add directives to my .htaccess files that will remove the headers added by the global configuration, or otherwise override the directive so that they're not added in the first place? Thank you very much Daniel

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  • Getting error 2048 at whatever I'm doing in Eclipse

    - by Bernhard V
    Hi, whatever I'm doing in Eclipse, I get an error. At start up I get an error at Java tooling initializing. I get an error when I want to open a type. And it's always the same error. For example, when opening a type I get: An internal error occurred during: "Cache refresh". 2048 The error at the start up also prints the error code as 2048. I'm using the most up to date version of Eclipse. Do you know a way to fix this issue?

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  • Why can't add a hot spare in freebsd? Can anybody help me fix it?

    - by hamlet
    Why can't add a hot spare? Can anybody help me fix it? mfiutil add e1:s1 mfid0 mfiutil: Drive 1 is not available My mfi status:: mfiutil show config mfi0 Configuration: 1 arrays, 1 volumes, 0 spares array 0 of 2 drives: drive 0 ( 137G) ONLINE <HITACHI HUS153014VLS300 A410 serial=JFWHSB4C> SAS enclosure 1, slot 0 drive 1 ( 137G) ONLINE <HITACHI HUS153014VLS300 A410 serial=JFWJ3AEC> SAS enclosure 1, slot 1 volume mfid0 (136G) RAID-1 64K OPTIMAL spans: array 0 mfiutil show events 1468 (boot + 25s/BATTERY/WARN) - Battery removed 1475 (boot + 52s/DRIVE/WARN) - PD 00(e1/s0) is not a certified drive 1478 (boot + 52s/DRIVE/WARN) - PD 01(e1/s1) is not a certified drive 1480 (boot + 64s/BATTERY/WARN) - BBU disabled; changing WB virtual disks to WT mfiutil show volumes mfi0 Volumes: Id Size Level Stripe State Cache Name mfid0 ( 136G) RAID-1 64K OPTIMAL Disabled

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  • Understanding top output in Linux

    - by Rayne
    Hi, I'm trying to determine the CPU usage of a program by looking at the output from Top in Linux. I understand that %us means userspace and %sy means system/kernel etc. But say I see 100%us. Does this mean that the CPU is really only doing useful work? What if a CPU is tied up waiting for resources that are not avaliable, or cache misses, would it also show up in the %us column, or any other column? Thank you.

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  • create a text table with php using fixed width font

    - by Hintswen
    I want to write a PHP script to output some data as a plain-text table using spaces to get the data into columns (just like the Linux top command). I can't use a HTML table as the script output will be saved to disk and viewed in a plain-text editor. Is there anything available that can do this automatically (format the data into columns)?

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  • What's your experience with Flash drives?

    - by Jon Ericson
    EMC is marketing Solid State Flash Drives and my project is thinking about moving that direction in the future. Does anyone have any experience with replacing traditional disk storage with flash drives? Besides price, have you experienced any downsides to the technology?

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  • Adobe Reader unable to open downloaded file in IE6

    - by chillysapien
    I'm working on a web app that allows users to downloaded dynamically generated PDF files. This works fine in IE8 and Firefox but fails in IE6 with Adobe Reader giving the message "there was an error opening this document. this file cannot be found" If I save the file to disk first then it opens fine in Reader. I've given the file a simple short filename, without spaces so not sure what else to try. Any suggestions are very welcome.

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  • Can't import matplotlib

    - by None
    I installed matplotlib using the Mac disk image installer for MacOS 10.5 and Python 2.5. I installed numpy then tried to import matplotlib but got this error: ImportError: numpy 1.1 or later is required; you have 2.0.0.dev8462. It seems to that version 2.0.0.dev8462 would be later than version 1.1 but I am guessing that matplotlib got confused with the ".dev8462" in the version. Is there any workaround to this?

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  • JQuery uploadify plugin not working

    - by Nitesh Panchal
    Hello, I first used primefaces FileUpload component and it didn't work. Always gave "HTTP Error". So i thought there is some bug with this component and went to plain old JQuery and tried using uploadify. But still i get the same error. I am using Container Managed Security. Is this the reason for not working properly? This is my script :- $(document).ready(function(){ $('#photoInput').uploadify({ 'script' : '/Blogger/fileUploadServlet', 'uploader' : './uploadify/uploadify.swf', 'cancelImg' : './uploadify/cancel.png', 'auto' : true }); And this is my servlet which is never executed :- package Servlets; import java.io.IOException; import java.io.PrintWriter; import java.util.Iterator; import java.util.List; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; @WebServlet(name = "fileUploadServlet", urlPatterns = {"/fileUploadServlet"}) public class fileUploadServlet extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, FileUploadException { PrintWriter out = response.getWriter(); try { System.out.println("Executed!!"); boolean isMultipart = ServletFileUpload.isMultipartContent(request); // Create a factory for disk-based file items FileItemFactory factory = new DiskFileItemFactory(); // Create a new file upload handler ServletFileUpload upload = new ServletFileUpload(factory); // Parse the request List /* FileItem */ items = upload.parseRequest(request); Iterator e = items.iterator(); while(e.hasNext()){ System.out.println(e.next().toString()); } } finally { out.close(); } } } }); Please help me. I am stuck on this since 3 hours.

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  • initWithCoder works, but init seems to be overwriting my objects properties?

    - by Zigrivers
    Hi guys, I've been trying to teach myself how to use the Archiving/Unarchiving methods of NSCoder, but I'm stumped. I have a Singleton class that I have defined with 8 NSInteger properties. I am trying to save this object to disk and then load from disk as needed. I've got the save part down and I have the load part down as well (according to NSLogs), but after my "initWithCoder:" method loads the object's properties appropriately, the "init" method runs and resets my object's properties back to zero. I'm probably missing something basic here, but would appreciate any help! My class methods for the Singleton class: + (Actor *)shareActorState { static Actor *actorState; @synchronized(self) { if (!actorState) { actorState = [[Actor alloc] init]; } } return actorState; } -(id)init { if (self = [super init]) { NSLog(@"New Init for Actor started...\nStrength: %d", self.strength); } return self; } -(id)initWithCoder:(NSCoder *)coder { if (self = [super init]) { strength = [coder decodeIntegerForKey:@"strength"]; dexterity = [coder decodeIntegerForKey:@"dexterity"]; stamina = [coder decodeIntegerForKey:@"stamina"]; will = [coder decodeIntegerForKey:@"will"]; intelligence = [coder decodeIntegerForKey:@"intelligence"]; agility = [coder decodeIntegerForKey:@"agility"]; aura = [coder decodeIntegerForKey:@"aura"]; eyesight = [coder decodeIntegerForKey:@"eyesight"]; NSLog(@"InitWithCoder executed....\nStrength: %d\nDexterity: %d", self.strength, self.dexterity); [self retain]; } return self; } -(void) encodeWithCoder:(NSCoder *)encoder { [encoder encodeInteger:strength forKey:@"strength"]; [encoder encodeInteger:dexterity forKey:@"dexterity"]; [encoder encodeInteger:stamina forKey:@"stamina"]; [encoder encodeInteger:will forKey:@"will"]; [encoder encodeInteger:intelligence forKey:@"intelligence"]; [encoder encodeInteger:agility forKey:@"agility"]; [encoder encodeInteger:aura forKey:@"aura"]; [encoder encodeInteger:eyesight forKey:@"eyesight"]; NSLog(@"encodeWithCoder executed...."); } -(void)dealloc { //My dealloc stuff goes here [super dealloc]; } I'm a noob when it comes to this stuff and have been trying to teach myself for the last month, so forgive anything obvious. Thanks for the help!

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  • IIS site hacked with ww.robint.us malware

    - by sucuri
    A bunch of IIS sites got hacked with a javascript malware pointing to ww.robint.us/u.js. Google cache says more than 1,000,000 different pages got affected: http://www.google.com/#hl=en&source=hp&q=http%3A%2F%2Fww.robint.us%2Fu.js http://blog.sucuri.net/2010/06/mass-infection-of-iisasp-sites-robint-us.html My question is: Did anyone here got hacked with that and still have any logs (or network dump) available for analysis? If you do, have you spotted anything interesting in there? Sites as big as wsj.com got hacked and some people are saying that maybe a zero-day on IIS/ASP.net is in the wild...

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  • HTML: how to create a "save as" button?

    - by user68759
    In your browser, when you want to save an HTML page that you are currently viewing, you normally go to the File menu and click Save As. Can I have a little button at the bottom of an HTML page that does the same thing? So instead of going to the File menu - Save As, I want my user to be able to click the button to save the page on to the disk. There is a solution exists using Javascript as far as I know, but it only works for IE. See here: link text

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  • Zero-channel RAID for High Performance MySQL Server (IBM ServeRAID 8k) : Any Experience/Recommendation?

    - by prs563
    We are getting this IBM rack mount server and it has this IBM ServeRAID8k storage controller with Zero-Channel RAID and 256MB battery backed cache. It can support RAID 10 which we need for our high performance MySQL server which will have 4 x 15000K RPM 300GB SAS HDD. This is mission-critical and we want as much bandwidth and performance. Is this a good card or should we replace with another IBM RAID card? IBM ServeRAID 8k SAS Controller option provides 256 MB of battery backed 533 MHz DDR2 standard power memory in a fixed mounting arrangement. The device attaches directly to IBM planar which can provide full RAID capability. Manufacturer IBM Manufacturer Part # 25R8064 Cost Central Item # 10025907 Product Description IBM ServeRAID 8k SAS - Storage controller (zero-channel RAID) - RAID 0, 1, 5, 6, 10, 1E Device Type Storage controller (zero-channel RAID) - plug-in module Buffer Size 256 MB Supported Devices Disk array (RAID) Max Storage Devices Qty 8 RAID Level RAID 0, RAID 1, RAID 5, RAID 6, RAID 10, RAID 1E Manufacturer Warranty 1 year warranty

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  • AD Users outside the building

    - by gammaRED
    I've never had a customer ask me this, but they keep insisting if they have Active Directory and a Domain, that mobile[road warriors] users will not be able to login to their laptops if they are at home or away from the office. I told them that is would use "cache" creds to do this. Am I right or wrong? I've been told this and found a couple of forums saying the same thing. What is really going on and how are the laptops able to do this?

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  • Puppet master/agent basic setup

    - by lewap
    I'm trying to setup a basic puppet agent/master use-case with an agent server and a master. I've setup two servers with puppet and puppet master respectively. After the following setup of both servers: puppet master --no-daemonize --verbose puppet agent --test puppet cert --list to get the list, puppet cert --sign to sign it. puppet agent --test I get the message: err: Could not retrieve catalog from remote server: hostname was not match with the server certificate warning: Not using cache on failed catalog err: Could not retrieve catalog; skipping run err: Could not send report: hostname was not match with the server certificate What do I need to do in order to get the agent/master to be able to talk to each other?

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