How to handle thousands of clients without using Overlapped I/O?

Is there's a way that allows me to handle thousands of clients without using Overlapped I/O? Based on what I know select() can only handle 64 sockets, and it is not a good idea to increase this limit (by overriding FD_SETSIZE).

On 2/25/2015 2:16 PM, Tom_912 wrote:
I don't have a problem in using Overlapped I/O, I just wanted to know if this is the only way to go.
Well, you could create thousands of threads, one per client, and use blocking sockets. Or you could use window-message based notifications - see WSAAsyncSelect. Or, you could poll with select(), a chunk of 64 at a time, with a short timeout. All of these
would work, though none would scale very well.
Igor Tandetnik

Similar Messages

  • How to handle system errors in XI using BPM? please help!

    Hi Experts,
         I have a requirement where I have to handle system errors. For example when I am making RFC call using RFC adapter if the remote destination is down then I have create a understandable error message and store it in another SAP table.
    How to handle it? I am using BPM. I can see that there is "Exceptions" in the send step. How to use this?
    Thanks
    Gopal

    Hi Gopalkrishna,
    In this case whenever you get Mapping Exception , you can raise an Exception with the help of BPM and you can send the status to the RFC. But with the help of BPM.
    For a Simple case refer:
    http://help.sap.com/saphelp_nw2004s/helpdata/en/33/4a773f12f14a18e10000000a114084/frameset.htm
    If you want you can do it without a BPM
    and throw an exception in case any of the values is missing:
    have a look at this weblog on how to throw exceptions
    in a nice way:
    /people/alessandro.guarneri/blog/2006/01/26/throwing-smart-exceptions-in-xi-graphical-mapping
    Also just go through <a href="/people/sap.user72/blog/2005/02/23/raising-exceptions-in-sap-xi-mapping Exceptions in SAP XI Mapping</a> and see if it helps you solve the problem.
    Also go through these links:
    http://help.sap.com/saphelp_nw04/helpdata/en/dc/6b7f2243d711d1893e0000e8323c4f/content.htm
    http://help.sap.com/saphelp_nw04/helpdata/en/68/253239bd1fa74ee10000000a114084/content.htm
    http://help.sap.com/saphelp_nw04/helpdata/en/cf/f2bbc8142c11d3b93a0000e8353423/frameset.htm
    http://help.sap.com/saphelp_nw04/helpdata/en/5d/2166e6a91d11d188de0000e8216438/content.htm
    http://help.sap.com/saphelp_nw04/helpdata/en/05/bb223905b61b0ae10000000a11402f/content.htm
    Please do let know if it helped.
    Regards,
    Abhy

  • I want to download an audiobook, but my daughter has a giftcard credit on the account. How can I download my audiobook without using the money from her giftcard?

    I want to download an audiobook, but my daughter has a gift card on the account.  How can I download my audiobook without using the money from her gift card?

    go directly to your ibook app. and you're going to find it. it's only with ibooks app.
    best
    Olivier
    <Edited by Host>

  • How can I track my iPod without using an app ?

    Hey I lost my iPod touch in school and I think one of my classmates took it how do I track it down without using an app ?

    The only way to track it at all is to first have enabled an iCloud account on it before it was lost, with the find my iPod setting in that account's setting panel set to "ON".
    If that was done, you can log in to your iCloud account in a web browser and you can try to track it.  It must be on, and it must have an active wifi data connection to be trackable.
    Without an iCloud account already on it though, there is no way to track it.

  • I have an apple emac powerpc G4 which is running 10.3.9 software. I downloaded the 10.5 leopard software. Does anyone know how to install the 10.5 without using the dvd installer? In dummy terms please?

    If any one could help me with this. i'd be enternally grateful as i'm getting nowhere on my own!
    I have an apple emac powerpc G4 which is running 10.3.9 software. I downloaded the 10.5 leopard software. Does anyone know how to install the 10.5 without using the dvd installer? In dummy terms please

    The only way to get 10.5 is to purchase it on CD. Such as http://www.amazon.com/Mac-OS-Leopard-10-5-10-51/dp/B0012RAVRC where is being sold for $179.99.
    If your optical drive is broken, you will either need to replace it or get an external. There is no other way.
    Why do wish to upgrade? As you can see it is going to be expensive, probably more the Mac is worth.
    Allan

  • How to create an apple id without using credit card

    how to create an apple id without using credit card.. i have recently purchased apple iphone 3gs bt unable to get apps because of giving credit card info which i dnt hav.. so plz tel me some way to process..

    To get the none option, sign out of anything apple you're signed into. Go to the app store and try to download a free app, any free app. Instead of signing in, take the option to to make a new apple ID. Then go through the steps to make the ID and you'll see the 'none' option.

  • How can I start windows 8 without useing my password

    how can I start windows 8 without useing my password

    Hi,
    Review the information posted in this thread.
    HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
    HP Photosmart Premium C309G, HP Photosmart 6520
    HP Touchpad, HP Chromebook 11
    Custom i7-4770k,Z-87, 8GB, Vertex 3 SSD, Samsung EVO SSD, Corsair HX650,GTX 760
    Custom i7-4790k,Z-97, 16GB, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 660TI
    Windows 7/8 UEFI/Legacy mode, MBR/GPT

  • How do I restart a process without using a loop?

    Hi,
    How can I restart a process without using the While action from the palette?
    The Wait action from the palette doesn't seem to do that.
    I simply want to restart a process after testing a condition in the Switch action.
    Thanks,
    Alexandru

    Hi,
    You can use the replay feature. Look at the BPEL references under the samples directory.
    hth,
    ~ronen

  • Manually set up the essbase 11 client (without using the fusion installer)

    Hi All,
    is it possible to install the Essbase 11 client without using the Fusion Installer?
    I tryed to copy the "bin" and "locale" directory from an exisiting installation and set up the ARBORPATH environment variable - without success.
    Did I miss anything? Maybe some Registry entries? Or isn't it possible to set up the essbase client manually?
    Every answer would be appreciated.
    Cheers,
    Martin

    Hi John,
    thanks for the hint that the addin is also available for any version.
    I have an application which uses the C-API (essapinu.dll, essotlnu.dll, ...) and I want to test it with diffrent Essbase Client Versions against diffrent Essbase Servers.
    These are the (client) versions which I want to test:
    EssbaseRtc11110WindowsFiles
    EssbaseRtc11111WindowsFiles
    EssbaseRtc11112WindowsFiles
    EssbaseRtc11113WindowsFiles
    EssbaseRtc9203WindowsFiles
    EssbaseRtc9210WindowsFiles
    EssbaseRtc9301WindowsFiles
    EssbaseRtc9310WindowsFiles
    I hoped it would be enough to replace some directorys on a machine instead of starting a lot of installers.
    Cheers,
    Martin

  • How to Start process in ProcessChain Without using Repeat option?

    How to Start process in ProcessChain Without using Repeat option?

    Se16 -- table:RSPCPROCESSLOG - click on display entries.
    Entet the variant, instance start date (this info you can get from the "display message" of PC.
    Now execute to display the table entries of RSPCPROCESSLOG.
    Next goto SE37 transaction --enter RSPC_PROCESS_FINISH
    Take the entries from the above table to set the input parameters of the FM.
    I_logid = log_id(from above table)
    I_type = type(from above table)
    i_variant = varaint (from above table)
    i_instance = (from above table)
    Click on F8(EXECUTE)
    now the actual process is set to gree and the process chain will be triggered (rest of the PC with out repeating the step from where is was red).

  • How do I register with iTunes without using a credit card it's not giving me a none option???

    How can I register with iTunes without using a credit card it's not giving me a none option!!

    Did you follow these instructions? You have to. Also, you have to use an email addresss that you have not used with Apple before, it has to be a new acciount.
    Creating an iTunes Store, App Store, iBookstore, and Mac App Store account without a credit card

  • How to display row to columns without using pivot keyword

    hi,
    could someone help me how to dispaly rows into columns without using pivot keyword and actuall my scenario is,iam having two tables with names and sample data is shown below
    ID PROJECT MID MINAME TASKID TASKNAME
    1     PROJ1     1     AA     100     PR1_TASK1
    1     PROJ1     3     CC     102     PR1_TASK3
    1     PROJ1     4     DD     103     PR1_TASK4
    1     PROJ1     5     EE     104     PR1_TASK5
    1     PROJ1     6     FF     105     PR1_TASK6
    2     PROJ2     5     EE     114     PR2_TASK1
    2     PROJ2     6     FF     115     PR2_TASK2
    2     PROJ2     7     GG     116     PR2_TASK3
    2     PROJ2     8     HH     117     PR2_TASK4
    2     PROJ2     9     JJ     118     PR2_TASK5
    2     PROJ2     10     KK     119     PR2_TASK6
    2     PROJ2     1     AA     120     PR2_TASK7
    The output should display project and count of tasks in particular milestone as shown below
    project AA BB CC DD EE FF GG HH JJ KK
    1 2 0 1 5 3 2 0 2 1 0
    2 1 2 0 2 1 0 2 4 3 1
    Thanks in advance ,
    vvr

    WITH t1 AS
    (SELECT 1 ID,
             'PROJ1' PROJECT,
             1 MID,
             'AA' MINAME,
             100 TASKID,
             'PR1_TASK1' TASKNAME
        FROM DUAL
      UNION
      SELECT 1, 'PROJ1', 3, 'CC', 102, 'PR1_TASK3'
        FROM DUAL
      UNION
      SELECT 1, 'PROJ1', 4, 'DD', 103, 'PR1_TASK4'
        FROM DUAL
      UNION
      SELECT 1, 'PROJ1', 5, 'EE', 104, 'PR1_TASK5'
        FROM DUAL
      UNION
      SELECT 1, 'PROJ1', 6, 'FF', 105, 'PR1_TASK6'
        FROM DUAL
      UNION
      SELECT 2, 'PROJ2', 5, 'EE', 114, 'PR2_TASK1'
        FROM DUAL
      UNION
      SELECT 2, 'PROJ2', 6, 'FF', 115, 'PR2_TASK2'
        FROM DUAL
      UNION
      SELECT 2, 'PROJ2', 7, 'GG', 116, 'PR2_TASK3'
        FROM DUAL
      UNION
      SELECT 2, 'PROJ2', 8, 'HH', 117, 'PR2_TASK4'
        FROM DUAL
      UNION
      SELECT 2, 'PROJ2', 9, 'JJ', 118, 'PR1_TASK5'
        FROM DUAL
      UNION
      SELECT 2, 'PROJ2', 10, 'KK', 119, 'PR1_TASK6'
        FROM DUAL
      UNION
      SELECT 2, 'PROJ2', 1, 'AA', 120, 'PR1_TASK7' FROM DUAL)
    SELECT id project,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'AA'
                  AND id = t_out.id),
               0) AA,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'BB'
                  AND id = t_out.id),
               0) BB,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'CC'
                  AND id = t_out.id),
               0) CC,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'DD'
                  AND id = t_out.id),
               0) DD,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'EE'
                  AND id = t_out.id),
               0) EE,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'FF'
                  AND id = t_out.id),
               0) FF,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'GG'
                  AND id = t_out.id),
               0) GG,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'HH'
                  AND id = t_out.id),
               0) HH,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'JJ'
                  AND id = t_out.id),
               0) JJ,
           NVL((SELECT mid
                 FROM t1
                WHERE miname = 'KK'
                  AND id = t_out.id),
               0) KK
      FROM (SELECT DISTINCT id FROM t1) t_out
    PROJECT     AA     BB     CC     DD     EE     FF     GG     HH     JJ     KK
    1     1     0     3     4     5     6     0     0     0     0
    2     1     0     0     0     5     6     7     8     9     10As I understand, you want MID of MINAMEs displayed ? But output is not like yours.. What is exactly your requirements?

  • How to swap two string variables without using a 3rd variable?

    How to swap two string variables without using a 3rd variable?
    ex.
    A = "aa"
    B = "bb"
    Result required
    A = "bb"
    B = "aa"
    Thanks

    How to swap two string variables without using a 3rd
    variable?
    Something like this.
    Append A with B (so A equals "aabb")
    Set B equal to a substring of A starting with the first character and ending at A's length minus B's length. (So B equals "aa")
    Set A equal to a substring of A starting from B's length and ending at the end of A. (So A equals "bb")

  • HT4623 I have tried resetting an iPhone 3 and I am unable to activate and sync it. How can I reset the device without using a computer?

    I have tried resetting an iPhone 3 and I am unable to activate and sync it. How can I reset the device without using a computer?

    Hello anacc,
    Thanks for using Apple Support Communities.
    For more information on this, take a look at:
    iOS: Unable to update or restore
    http://support.apple.com/kb/HT1808
    Connect your USB cable to your computer but not to the iPhone, iPad, or iPod touch until step 3.
    Turn off the device: Press and hold the Sleep/Wake button for a few seconds until the red slider appears, then slide the slider. Wait for the device to turn off.If you cannot turn off the device using the slider, press and hold the Sleep/Wake and Home buttons at the same time. When the device turns off, release the Sleep/Wake and Home buttons.
    While pressing and holding the Home button down, connect the USB cable to the iPhone, iPad, or iPod touch. The device should turn on.
    Continue holding the Home button until you see the Connect to iTunes screen. When this screen appears, you can release the Home button:
    Note: If the image of a battery appears, let the device charge for at least ten minutes to ensure that the battery has some charge, and then start with step 2 again. If you don't see the Connect to iTunes screen, try these steps 1 through 4 again.
    iTunes should automatically open and display the following message:
    "iTunes has detected an iPhone in recovery mode. You must restore this iPhone before it can be used with iTunes."Note: If iTunes not open after two minutes, please open iTunes yourself.
    Use iTunes to restore the device.
    Best of luck,
    Mario

  • HT2589 how can i create apple id without using credit card details ?

    how can i create apple id without using credit card details ?

    @Limnos - that doesn't work anymore. There is no NONE option. I've been at it for hours trying to set up my daughter's account. I've tried creating and verifying an appleID on the web, on her touch...everything. Every single time you get to the stupid Touch, it wants to walk you through the verification of the account and it demands payment (even for their suggested apple Remote method listed in the KB).

Maybe you are looking for

  • KIMYONG : basic  Export / Attachment issues  가이드

    Purpose ====== 이 문서는 Support Analayst / DBA에게 Export /Attachments issues 발생시 조치할수 있는 기본적인 Troubleshooting Guide를 소개하고자 합니다. Explanations ====== Export Analysis Turn on export debug, Go to Help -> Diagnostics -> Examine Set Block = GLOBAL Set Field =

  • Integration services on UN

     

  • Photoshop Elements 10 organizer inoperable see Apple beach ball

    Hello people, Problem with PS10 organizer, it doesn't work. I see the Apple beachball rolling. I'm running 10.8.2 (Mountain Lion) on my iMac, current on updates. Using iPhoto 11, current on updates. I've been using my PS8 to do my work, and saving it

  • 11"/13" macbook air for design + travel

    Hi everyone! I am thinking about getting a new macbook air, either the 11" or 13". I am a graphic designer and I am running on Adobe Creative Suite 5, mostly using Photoshop, InDesign and Illustrator. I wanted to get the 11" just because I will be tr

  • マテリアライズドビューの削除

    マテリアライズドビューを削除⇒再作成をしたいのですが. 削除ができなくなりました.経緯は以下です. 1.作成 CREATE MATERIALIZED VIEW MV_XXX BUILD IMMEDIATE REFRESH FORCE ON DEMAND START WITH SYSDATE NEXT SYSDATE + 1 WITH PRIMARY KEY AS SELECT ・・・ で正常に作成. 2.削除(初回) drop MATERIALIZED VIEW MV_XXX とすると. ORA