Alpha Software Mobile Development Tools:   Alpha Anywhere    |   Alpha TransForm subscribe to our YouTube Channel  Follow Us on LinkedIn  Follow Us on Twitter  Follow Us on Facebook

Announcement

Collapse

The Alpha Software Forum Participation Guidelines

The Alpha Software Forum is a free forum created for Alpha Software Developer Community to ask for help, exchange ideas, and share solutions. Alpha Software strives to create an environment where all members of the community can feel safe to participate. In order to ensure the Alpha Software Forum is a place where all feel welcome, forum participants are expected to behave as follows:
  • Be professional in your conduct
  • Be kind to others
  • Be constructive when giving feedback
  • Be open to new ideas and suggestions
  • Stay on topic


Be sure all comments and threads you post are respectful. Posts that contain any of the following content will be considered a violation of your agreement as a member of the Alpha Software Forum Community and will be moderated:
  • Spam.
  • Vulgar language.
  • Quotes from private conversations without permission, including pricing and other sales related discussions.
  • Personal attacks, insults, or subtle put-downs.
  • Harassment, bullying, threatening, mocking, shaming, or deriding anyone.
  • Sexist, racist, homophobic, transphobic, ableist, or otherwise discriminatory jokes and language.
  • Sexually explicit or violent material, links, or language.
  • Pirated, hacked, or copyright-infringing material.
  • Encouraging of others to engage in the above behaviors.


If a thread or post is found to contain any of the content outlined above, a moderator may choose to take one of the following actions:
  • Remove the Post or Thread - the content is removed from the forum.
  • Place the User in Moderation - all posts and new threads must be approved by a moderator before they are posted.
  • Temporarily Ban the User - user is banned from forum for a period of time.
  • Permanently Ban the User - user is permanently banned from the forum.


Moderators may also rename posts and threads if they are too generic or do not property reflect the content.

Moderators may move threads if they have been posted in the incorrect forum.

Threads/Posts questioning specific moderator decisions or actions (such as "why was a user banned?") are not allowed and will be removed.

The owners of Alpha Software Corporation (Forum Owner) reserve the right to remove, edit, move, or close any thread for any reason; or ban any forum member without notice, reason, or explanation.

Community members are encouraged to click the "Report Post" icon in the lower left of a given post if they feel the post is in violation of the rules. This will alert the Moderators to take a look.

Alpha Software Corporation may amend the guidelines from time to time and may also vary the procedures it sets out where appropriate in a particular case. Your agreement to comply with the guidelines will be deemed agreement to any changes to it.



Bonus TIPS for Successful Posting

Try a Search First
It is highly recommended that a Search be done on your topic before posting, as many questions have been answered in prior posts. As with any search engine, the shorter the search term, the more "hits" will be returned, but the more specific the search term is, the greater the relevance of those "hits". Searching for "table" might well return every message on the board while "tablesum" would greatly restrict the number of messages returned.

When you do post
First, make sure you are posting your question in the correct forum. For example, if you post an issue regarding Desktop applications on the Mobile & Browser Applications board , not only will your question not be seen by the appropriate audience, it may also be removed or relocated.

The more detail you provide about your problem or question, the more likely someone is to understand your request and be able to help. A sample database with a minimum of records (and its support files, zipped together) will make it much easier to diagnose issues with your application. Screen shots of error messages are especially helpful.

When explaining how to reproduce your problem, please be as detailed as possible. Describe every step, click-by-click and keypress-by-keypress. Otherwise when others try to duplicate your problem, they may do something slightly different and end up with different results.

A note about attachments
You may only attach one file to each message. Attachment file size is limited to 2MB. If you need to include several files, you may do so by zipping them into a single archive.

If you forgot to attach your files to your post, please do NOT create a new thread. Instead, reply to your original message and attach the file there.

When attaching screen shots, it is best to attach an image file (.BMP, .JPG, .GIF, .PNG, etc.) or a zip file of several images, as opposed to a Word document containing the screen shots. Because Word documents are prone to viruses, many message board users will not open your Word file, therefore limiting their ability to help you.

Similarly, if you are uploading a zipped archive, you should simply create a .ZIP file and not a self-extracting .EXE as many users will not run your EXE file.
See more
See less

Long delays over company network

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Long delays over company network

    Here is a question that I hope someone would be able to help me understand so that I may be able to better program.

    I work for a county agency. We have several offices located about 82 miles apart. From our technical services bureau, there may be as many as 16 switches, hubs, routers, etc., between each office. The main database is located in our main office. The remote office is able to access the main database through the county network. We are currently using fractional T1 lines. There are numerous tables within the database. There is one table which is the primary table from which all other tables are updated from. When accessing the database, from the remote office there is a delay of anywhere from 1 to 3 minutes. the main office has only a slight delay. The main table has approximately 250 fields and the .ddm file is approximately 4.4mb. The database has been optimized and each workstation has a copy of the shadow files. I am sure that there are a number of potentials for the delay including indeces being opened but the delay is very frustrating for the remote office. I understand that in using shadow files the request goes to the local drive thaen is redirectoed to the server, but for a script which may be only 30 lines, the delay is difficult to understand. Therefore, perhaps if I understood the way in which A5v4.5 opens and accesses files. Although the database is optimized it still appears that A5 may still be accessing some of the forms from the server instead of the local drive. There is something that is just not working right and I believe that it may be related to the way in which A5 is accessing forms.

    Can anyone help with this and I can call to discuss this with anyone that truly has a good working knowledge of the way A5 works internally.

    I could really use the help and perhaps this could be a problem that may help others with similar installations over long distances.

    Thanks in advance.

    warren

  • #2
    RE: Long delays over company network

    There have been a number of threads about different ways to operate remotely. Try doing some searches on words like "remote" "terminal services" "wan" and others.

    In a nutshell, A5v4.5 is not client server, so extreme slowdowns should be expected when operating over a Wan without the use of something like Terminal Services, PC Anywhere or other communication software.

    Application design including the extensive use of graphics is also a factor, and certainly you would have to be optimized, but I don't think either will overcome the fact that Alpha is not client server at this time.

    Comment


    • #3
      RE: Long delays over company network

      Thank you for the reply. I did talk with our technical services bureau and discussed this problem with them. They had suggested the possiblity of using a SQL server but this is costly. Then I was told just how fast this network is; the local system is 100mbit but when it comes to the long haul to the main office, the T1 line is only 1.5mbit, thus providing some insight to such slow responses from the remote office. I had thought and noticed that when certain forms had scripts to switch to and open an index on entry, that that function may be adding to the delay. I did notice that if I assign an index to the form properties, a blue bar would appear across the bottom as the index was being built, that property has been removed. Another thought was that in the way A5 manges the forms in a shadow file, should the fomrs be stored in the .ddm file or some other one. I am referring to the file change that occurred after v1, .alm maybe?? I was thinking that although v4.5 optimizes and creates the .dd* files in the workstation, perhaps it is still reading from the network drive instead. just a thought.

      Again, thank you for your thoughts.


      Warren

      Comment


      • #4
        RE: Long delays over company network

        I have a customer with a similar problem.

        Even when "just" running a script that only does data manipulations (copy, append, change, etc.) a 30 second operation at the main office can take about 1/2 hour at the remote office. We were told that it could be improved by upgrading the equipment at the end of the T1 line BUT it would cost about $20,000. (I don't remember what the equipment is called but I can find out if you want me to.)

        The only solution we've come up with so far that stays within their budget is to set up a dedicated terminal at the server so users from the remote station can log into it with PCAnywhere via the T1 line when running the database. This basically limits them to one remote user at a time but this is seldom an issue and never a problem - there are only 3 people in the main office who might use it and they are close enough together to talk to each other.

        There may be better options than PCAnywhere but they already had it so the price was right.

        Comment


        • #5
          RE: Long delays over company network

          Hi Cal

          It's been a long time. Thanks for the reply, and yes some scripts seem to take longer than others. A T3 is app 45mbit and would certainly improve the speed but right now the county has it's financial problems and an additional $12,000 per month wasn't in their budget. I think that is what TSB was suggesting as the cost. Unfortunately, we run a government agency and the software is on-line by all of the on-duty personnel during their work hours. At one time we did have a dedicated line via PCAnywhere but having just one terminal to get data just won't work any more. I am still thinking that even with the optimized files on each workstation, it would appear that something is still acceessing the main dictionaries on the server, instead of the workstation, and possibly it is what is causing/adding to the delay. Optimizing did have a very positive impact to time but I had to disconnect 9 of the 11 databases that the main table posts to to help knock down the time. I was told that a SQL server may be an answer but our TSB unit did talk with A5 tech support before we purchased the runtime module and it is unclear if it would solve the problem as the overall line speed is still 1.5mbit. I am kind of wondering if the same problem exists in 5.0, but until we purchase the upgrade, I won't know.

          Thanks again for your input.


          Warren

          Comment


          • #6
            RE: Long delays over company network

            what about using Citrix?
            Cole Custom Programming - Terrell, Texas
            972 524 8714
            martin_w_cole@msn.com

            ____________________
            "A young man who is not liberal has no heart, but an old man who is not conservative has no mind." GB Shaw

            Comment


            • #7
              RE: Long delays over company network

              As Martin suggested, Citrix may be the only answer at this time.

              I believe the issue is that the 'computations' must all be done on the local computer. So, even an append operation reads each record of data from the server, takes it to the local station, crunches it (checks to be sure it should be appended, etc.), then sends it back.

              At least that's my understanding of why a true client/server system is so much better on networks. All the number crunching is done on the server and only the result is sent to the local workstation.

              Comment


              • #8
                RE: Long delays over company network

                Thanks Cal,

                Although I am not familiar with Citrix, I will look it up o the net and let TSB know and see just how much it will cost.

                Warren

                Comment


                • #9
                  RE: Long delays over company network

                  If you have windows 2000 server I believe it comes with terminal server capabilities. I use this to trouble shoot clients alpha programs. Almost as fast as being there.

                  A wide area network needs terminal server or citrix to work with any kind of speed

                  Bob Sullivan

                  Comment

                  Working...
                  X