Search Results

Search found 32991 results on 1320 pages for 'david read'.

Page 75/1320 | < Previous Page | 71 72 73 74 75 76 77 78 79 80 81 82  | Next Page >

  • Is it reasonable that a random disk seek & read costs ~16ms?

    - by fzhang
    I am frustrated about the latency of random reading from a non-ssd disk. Based on results from following test program, it speeds ~16 ms for a random read of just 512 bytes without help of os cache. I tried changing 512 to larger values, such as 25k, and the latency did not increase as much. I guess it is because the disk seek dominates the time. I understand that random reading is inherently slow, but just want to be sure that ~16ms is reasonable, even for non-ssd disk. #include <sys/stat.h> #include <sys/time.h> #include <sys/types.h> #include <sys/unistd.h> #include <fcntl.h> #include <limits.h> #include <stdio.h> #include <string.h> int main(int argc, char** argv) { int fd = open(argv[1], O_RDONLY); if (fd < 0) { fprintf(stderr, "Failed open %s\n", argv[1]); return -1; } const size_t count = 512; const off_t offset = 25990611 / 2; char buffer[count] = { '\0' }; struct timeval start_time; gettimeofday(&start_time, NULL); off_t ret = lseek(fd, offset, SEEK_SET); if (ret != offset) { perror("lseek error"); close(fd); return -1; } ret = read(fd, buffer, count); if (ret != count) { fprintf(stderr, "Failed reading all: %ld\n", ret); close(fd); return -1; } struct timeval end_time; gettimeofday(&end_time, NULL); printf("tv_sec: %ld, tv_usec: %ld\n", end_time.tv_sec - start_time.tv_sec, end_time.tv_usec - start_time.tv_usec); close(fd); return 0; }

    Read the article

  • How to write to a Mac OSX read-only filesystem?

    - by marienbad
    I have DMG I need to mount and write a file to. When I mount it, finder shows the root and all as read-only. Then I discovered 'mount -w'. But when I run that, I get 'mount: unknown special file or file system.' How can I mount this disk image as writable, or force a file into it?

    Read the article

  • How do I read old star office 5.x spreadcheet documents today? (*.sdc)

    - by Johan
    Hi I found a couple of old spreadsheet documents that I created a couple of years ago that I would like to read again. I think I used the old Star Office 5.2 to create those Spreadsheets. They all have names like *.sdc I have tried to use Open Office to open them, but he can't recognise what it is. Does anybody have any idea how I can open those documents? Thanks Johan

    Read the article

  • Where can I go to learn how to read a sql server execution plan?

    - by Chris Lively
    I'm looking for resources that can teach me how to properly read a sql server execution plan. I'm a long time developer, with tons of sql server experience, but I've never really learned how to really understand what an execution plan is saying to me. I guess I'm looking for links, books, anything that can describe things like whether a clustered index scan is good or bad along with examples on how to fix issues.

    Read the article

  • How to start Cygwin's NFS server in read-write mode?

    - by Vi
    Installed Cyginw NFS server. It works. But I can't make it allow writing to the filesystem. Why does it fail? Server: $ cat /etc/exports #/ 10.99.98.2(rw,no_root_squash) /cygdrive/c/foranevia *(rw,no_squash_root,anon_uid=0,anon_gid=0,no_subtree_check) Client: root@vi-notebook:/mnt# mount wpc:/cygdrive/c/foranevia nfs root@vi-notebook:/mnt# mkdir nfs/qqq mkdir: cannot create directory `nfs/qqq': Read-only file system

    Read the article

  • How can I read out internal pdf creation/modified date with Windows PowerShell?

    - by Martin
    PDF files seem to have a separate set of file properties which contain (among others) a creation date and a modified date (see screenshot here: http://ventajamarketing.com/writingblog/wp-content/uploads/2012/02/Acrobat-Document-Properties1-300x297.png). Those date obviously can differ from the creation and modified date shown in the file system (Windows Explorer). How can I access the date information in the PDF file and read it out in Windows 7 with Windows PowerShell (or maybe another method)?

    Read the article

  • Which user does PHP/IIS6 use to read/write files?

    - by Stung
    Hi, I've installed PHP5 (FastCGI) on IIS6 and is just wondering which windows user PHP uses to access the file system? With ASP.NET for example, the ASPNET account is used to access the file system. But how about PHP? I've read some post that suggest it uses the anonymous (i.e. IUSR) account. But isn't it a security breach if I give write access to the IUSR account? Thanks!

    Read the article

  • How to read Hebrew text using System.IO.FileStream?

    - by Jonathan Dyle
    Hi all Am I missing something or does System.IO.FileStream not read Unicode text files containing Hebrew? public TextReader CSVReader(Stream s, Encoding enc) { this.stream = s; if (!s.CanRead) { throw new CSVReaderException("Could not read the given CSV stream!"); } reader = (enc != null) ? new StreamReader(s, enc) : new StreamReader(s); } Thanks Jonathan

    Read the article

  • How to read a PS file in reverse order?

    - by Raja Reddy
    I have a PS file to be read in reverse order and process accordingly. Do we have a way to mention to read the file in reverse order in FD in COBOL module? OR do we have something to achieve the same using SORT? Note: Reading the records into a buffer (array) and using it in reverse order would be the first idea that comes to mind but that way doesnt work for file with millions of records. Your suggestions will be appreciated.

    Read the article

  • How to read an IIS 6 Website's Directory Structure using WMI?

    - by Steve Johnson
    I need to read a website's folders using WMI and C# in IIS 6.0. I am able to read the Virtual directories and applications using the "IISWebVirtualDirSetting" class. However the physical folders located inside a website cannot be read using this class. And for my case i need to read sub folders located within a website and later on set permission on them. For my requirement i dont need to work on Virtual Directories/Web Service Applications (which can be easily obtained using the code below..). I have tried to use IISWebDirectory class but it has been useful. Here is the code that reads IIS Virtual Directories... public static ArrayList RetrieveVirtualDirList(String ServerName, String WebsiteName) { ConnectionOptions options = SetUpAuthorization(); ManagementScope scope = new ManagementScope(string.Format(@"\\{0}\root\MicrosoftIISV2", ServerName), options); scope.Connect(); String SiteId = GetSiteIDFromSiteName(ServerName, WebsiteName); ObjectQuery OQuery = new ObjectQuery(@"SELECT * FROM IISWebVirtualDirSetting"); //ObjectQuery OQuery = new ObjectQuery(@"SELECT * FROM IIsSetting"); ManagementObjectSearcher WebSiteFinder = new ManagementObjectSearcher(scope, OQuery); ArrayList WebSiteListArray = new ArrayList(); ManagementObjectCollection WebSitesCollection = WebSiteFinder.Get(); String WebSiteName = String.Empty; foreach (ManagementObject WebSite in WebSitesCollection) { WebSiteName = WebSite.Properties["Name"].Value.ToString(); WebsiteName = WebSiteName.Replace("W3SVC/", ""); String extrctedSiteId = WebsiteName.Substring(0, WebsiteName.IndexOf('/')); String temp = WebsiteName.Substring(0, WebsiteName.IndexOf('/') + 1); String VirtualDirName = WebsiteName.Substring(temp.Length); WebsiteName = WebsiteName.Replace(SiteId, ""); if (extrctedSiteId.Equals(SiteId)) //if (true) { WebSiteListArray.Add(VirtualDirName ); //WebSiteListArray.Add(WebSiteName); //+ "|" + WebSite.Properties["Path"].Value.ToString() } } return WebSiteListArray; } P.S: I need to programmatically get the sub folders of an already deployed site(s) using WMI and C# in an ASP. Net Application. I need to find out the sub folders of existing websites in a local or remote IIS 6.0 Web Server. So i require a programmatic solution. Precisely if i am pointed at the right class (like IISWebVirtualDirSetting etc ) that i may use for retrieving the list of physical folders within a website then it will be quite helpful. I am not working in Powershell and i don't really need a solution that involves powershell or vbscripts. Any alternative programmatic way of doing the same in C#/ASP.Net will also be highly appreciated.

    Read the article

  • How can I read/write data from a file?

    - by samy
    I'm writing a simple chrome extension. I need to create the ability to add sites URLs to a list, or read from the list. I use the list to open the sites in the new tabs. I'm looking for a way to have a data file I can write to, and read from. I was thinking on XML. I read there is a problem changing the content of files with Javascript. Is XML the right choice for this kinda thing? I should add that there is no web server, and the app will run locally, so maybe the problem websites are having are not same as this. Before I wrote this question, I tried one thing, and started to feel insecure because it didn't work. I made a XML file called Site.xml: <?xml version="1.0" encoding="utf-8" ?> <Sites> <site> <url> http://www.sulamacademy.com/AddMsgForum.asp?FType=273171&SBLang=0&WSUAccess=0&LocSBID=20375 </url> </site> <site> <url> http://www.wow.co.il </url> </site> <site> <url> http://www.Google.co.il </url> </site> I made this script to read the data from him, and put in on the html file. function LoadXML() { var ajaxObj = new XMLHttpRequest(); ajaxObj.open('GET', 'Sites.xml', false); ajaxObj.send(); var myXML = ajaxObj.responseXML; document.write('<table border="2">'); var prs = myXML.getElementsByTagName("site"); for (i = 0; i < prs.length; i++) { document.write("<tr><td>"); document.write(prs[i].getElementsByName("url")[0].childNode[0].nodeValue); document.write("</td></tr>"); } document.write("</table"); }

    Read the article

  • ASP.net MVC - Determine how many bytes of a request have been read/received?

    - by vdhant
    Hey guys Just wondering if anyone has any idea how you can determine how many bytes of a request have been read/received by the server... In other words how do I stream http request... In that, users are uploading files and I want to report on a perotic basis how many bytes have been read/received so far. Just wondering if anyone has any ideas on how I might do this... Cheers Anthony

    Read the article

  • Java - is it possible to read a file line by line, stop, and then immediately start reading bytes wh

    - by hatorade
    I'm having an issue trying to parse the ascii part of a file, and once I hit the end tag, IMMEDIATELY start reading in the bytes from that point on. Everything I know in Java to read off a line or a whole word creates a buffer, which ruins any chance of getting the bytes immediately following my stop point. Is the only way to do this read in byte-by-byte, find new-lines, reconstruct everything prior to the new-line, see if it's my end tag, and go from there?

    Read the article

< Previous Page | 71 72 73 74 75 76 77 78 79 80 81 82  | Next Page >