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run a runtime application in a network and no shadow db

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    run a runtime application in a network and no shadow db

    Is it safe to run a runtime application in a network and no shadow db with about 20 users?
    In other words, a runtime app with the db in the server only.
    So the users will open the runtime and then open the db in a server.
    Is this feasible or possible danger of file corruption?

    #2
    Re: run a runtime application in a network and no shadow db

    It's absolutely safe to do, I do it with approximately 40 users daily.
    For the most part, I use MySQL as the backend.
    Gregg
    https://paiza.io is a great site to test and share sql code

    Comment


      #3
      Re: run a runtime application in a network and no shadow db

      Thanks for the response. I will follow further

      Comment


        #4
        Re: run a runtime application in a network and no shadow db

        The big thing with using shadowed tables is the screen refresh. I would think 20 users would notice quite a lag during data entry without it.
        Robin

        Discernment is not needed in things that differ, but in those things that appear to be the same. - Miles Sanford

        Comment


          #5
          Re: run a runtime application in a network and no shadow db

          Good observation, Thanks.
          Problems are beginning to show.
          1st let me explain the scenario. It was not my choice.
          The data is loaded in a remote server.
          That server has the runtime also and is loaded along with the data.
          So the users open the runtime using Citrix, individually.

          Already one table loss some data.
          The major issue now is that after printing a report we get an error runtime error:with A5print.dbi
          So the report prints. then stops the program. with above error.
          The program is running with the property 'as administrator'.
          The reports, do not have 'Lock table' checked. I will try later tonight to unlock and see if that helps.
          Any suggestions?

          Comment


            #6
            Re: run a runtime application in a network and no shadow db

            Slight twist, I have 14 users using local runtime to open the data files on the server. No problems. This does not utilize shadowing at all.
            Dave Mason
            [email protected]
            Skype is dave.mason46

            Comment


              #7
              Re: run a runtime application in a network and no shadow db

              Originally posted by DaveM View Post
              Slight twist, I have 14 users using local runtime to open the data files on the server. No problems. This does not utilize shadowing at all.
              Dave,

              Curious why you choose not to utilize shadowing?

              Thanks

              Comment


                #8
                Re: run a runtime application in a network and no shadow db

                The data is loaded in a remote server.
                That server has the runtime also and is loaded along with the data.
                So the users open the runtime using Citrix, individually.
                So if I understand this correctly, you are opening 20 instances of the runtime on the server and all instances are connected to the workspace files on the same server. This is like opening 20 instances of the runtime on a stand alone computer. If this is correct, I think you will find that Alpha has loaded in the same core of the processor. From Lenny Forziati on the message board: "Alpha intentionally binds to a single CPU on a multi-CPU/core system in order to avoid any problems"

                In this configuration, shadowing would not be beneficial. Shadowing is beneficial when separate work stations each running it's own runtime are connected to data files on a remote server.
                Alpha 5 Version 11
                AA Build 2999, Build 4269, Current Build
                DBF's and MySql
                Desktop, Web on the Desktop and WEB

                Ron Anusiewicz

                Comment


                  #9
                  Re: run a runtime application in a network and no shadow db

                  I believe that it is what happening. In the past when running a single runtime in a PC, of course with no shadow db, and loading runtime a 2nd time, alpha will fail after a while. Only a closing of both runtime instances and a complete reboot, things will come back to normal.
                  So far under Citrix, seems to work, ('seems to work') The only issue is when printing. The moment that Alpha send a report to the printer, Alpha stops working and reload is needed. If the report is sent to the screen, it is OK. Also printing to a PDF printer is OK.
                  Have any one experienced this issue?

                  Comment


                    #10
                    Re: run a runtime application in a network and no shadow db

                    I have always used the bootstrap method for distributed apps running from a server.
                    Reason;
                    1) the app files are downloaded to the separate pc's, creating a network optimised data exchange
                    2) when the base app is updated, the latest version is available to the user.
                    3) latency. You will bump into yourself if you open (in my experience) more than 5 users in a key bashing environment.
                    See our Hybrid Option here;
                    https://hybridapps.example-software.com/


                    Apologies to anyone I haven't managed to upset yet.
                    You are held in a queue and I will get to you soon.

                    Comment


                      #11
                      Re: run a runtime application in a network and no shadow db

                      Glad to hear from you. Correct.
                      That is the best and effective way. This scenario is not my choice and I am trying to help]
                      The system was working, just as you explained.
                      In this case the data is in a remote server. So they tried to replicate the normal process and it was so slow that users had a chance to take coffee breaks between searches. and printing took a loooong time.
                      So the came up with the idea of using Citrix. Maybe that works in other situations.
                      So I am hoping from Alpha users using Citrix, if they were able to overcome the printing issue.
                      I have searched in the web and Citrix is know for printing issues.

                      Comment


                        #12
                        Re: run a runtime application in a network and no shadow db

                        How complex is the application, Mike?
                        Do you need centralised or local printing?
                        See our Hybrid Option here;
                        https://hybridapps.example-software.com/


                        Apologies to anyone I haven't managed to upset yet.
                        You are held in a queue and I will get to you soon.

                        Comment


                          #13
                          Re: run a runtime application in a network and no shadow db

                          One caution: Using shadow is straight forward, but direct with no shadow, you have to create forms a bit different to not dupe where it is needed. Records could overwrite each other without some thought.
                          Dave Mason
                          [email protected]
                          Skype is dave.mason46

                          Comment


                            #14
                            Re: run a runtime application in a network and no shadow db

                            Ted, I just got word, they got to print. The did as instructed by Citrix in reloading new printer drivers in Citrix.
                            One question to Dave, create forms differently? Can you give me a hint?
                            BY the way thanks for all the responses.

                            Comment


                              #15
                              Re: run a runtime application in a network and no shadow db

                              Records could overwrite each other without some thought.

                              As soon as the first field is complete, save the record if no shadow is used.

                              I actually do that all the time to prevent users overwriting each other. Safety thing!
                              Dave Mason
                              [email protected]
                              Skype is dave.mason46

                              Comment

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