I have an account for MS store. I prepared an app but it was refused. I was looking through log of problems, but found nothing helpful.
Do you have a gallery of apps which MS store accepted? This will be a good start for me.
I made several little apps as Hello world, but they were all refused. Probably I am making some stupid mistake, but MS store does not provide any helpful feedback.
Related
currently I am writing a Windows 8 App with Sqlite as a database. I want to give the user the ability to view his data in every instance of the app on any device. Usually this problem could be easily solved by using a online database like Windows Azure. But this is not an option in my case.
Is it a good idea to use Microsoft's free service "Skydrive" as a platform to synchronize database files among several devices? Does somebody know any open source projects or blogs that are dealing with this problem that could save me some time for writing the necessary code?
If it's a bad idea, which other options are there that I could use. I want to keep Sqlite as the database for my App.
I am glad to get any kind of feedback or links to resources that might help me.
Best regards
Philipp
imo it isn't a good idea cause the access to db files is to easy. Ofc you can say that access to database files is easy cause you need to just know the app data path to package of your app but still it`s much more difficult than just opening skydrive. And think what would happen if someone would make this directory on skydrive as public.
I would combine local db and online db. Online db as a service for synchronizing data and local db for normal work.
I am fairly new to dealing with high traffic websites and I'm looking for a setup that will be able to scale well into the future.
My site currently uses one main script to pull data and store it into a database. The rest of the website is mostly presentation of this data from the database.
I have been looking at the possibility of using Amazon Web Services (EC2) or Google Compute Engine for running the main script. Then transferring that data to a more typical web hosting service. One thing I am not sure that I need to worry about is load balancing, I've seen that using NGINX for the load balancing can help improve the performance.
My goal is to have the site up 99.99% of the time and execute the script as fast as possible. It would be optimally nice to have a great support in case something goes wrong too.
Any ideas, comments, or suggestions are welcome. I'm am trying to learn how to handle this as I have a couple other websites that are currently growing and may need such a setup in the near future.
Thanks!
Google Compute Engine is still in its very early stages. For that reason alone, I would recommend using EC2. With EC2, you have all of the features you need. The ELB can seamlessly load balance between any amount of servers, which would help with the 99.99% uptime.
Using CloudFormation, you can define templates for scaling to run that script in a clustered environment.
Hope this helps.
Just find yourself a good host with a decent SLA, running a relational database within the cloud is asking for problems when you do get high database loads.
Don't be fooled, the cloud is a really nice solution for some problem.. but NOT ALL!
Same goes for NoSQL, and the combination of cloud and NoSQL.
Do your own research and don't be hoaxed by the marketing machines and the people not doing their homework.
Loadbalancing is nice but big change your database is the first bottleneck you run into.
Don't optimize thing before you need to!
If you are asking me, find yourself a decent dedicated (non-virtual) server with a decent SLA and backup plan.
Calculate howmuch 99.9% uptime actually is and realize that there is no problem in reaching that aslong as you have a decent SLA and proper backups.
You can always go from iron to the cloud,.. the other way around is a different story.
I am a big fan of Firebird DB, I am using it since 1.5.0 version, but I am curious why FB is not that much popular as web sites back-end DB. I would like to use embedded Firebird DB on my websites (after 2.5 version improvements), advantages are obvious (no need to install anything, all dll-s you can put in your web site bin folder and FDB in App_Data – I am using asp.net technology).
My question is: does anybody has some experiences with this approach (Medium Trust shared hosting), and what limitation I might expect? How many concurrent users can be acceptable in such scenario, are there some known issues I need to be aware of and so? Is lack of security mechanism in embedded that big disadvantage for this approach?
Thanks in advance.
First off, I do not have any experience with Firebird. When googling though, I do see reports of problems using it in medium trust. But if you want to know for sure, just try! It might well be that the information I'm reading is old.
Concurrent users is a difficult question to be fairly honest. I suppose it (how many) depends on too many factors to give a good answer. But the most important thing you want to look at is concurrent writing. For example SQL Lite does not support this (afaik), and in a web application this is bound to happen. I think FB supports this, but you might want to check this to be sure.
About security; as far as I know FB does not support encryption nor password protection. This is a valid concern you express, if anyone compromises your server the FB file is there for grabbing. Methods to work around this are not pretty (encrypting before insert/update and decrypting at retrieval, or filesystem encryption), so if security is important this will be your biggest concern.
I'd like to state again that I do not have experience with FB myself, I just express the concerns I would have myself when thinking of such a scenario and try to get some information on the internet.
Several months (maybe even a year or two) ago, I saw an asp .net article that showed how to tell how many people were connected to a running web application. Of course I only glanced over the article & didn't save it. Does anyone remember seeing the article or know where I can find it or perhaps something like it? I have searched Google from the best of my memory of the title & content but I'm getting no hits.
The reason I'm asking is because I have a WCF web service that has crashed several times after I publish updates and the only thing I can think that would cause these weird problems is that people are connected to it & its corrupting the files. I'm not going to publish any more updates during the day now, but we also have a couple of people that work during the night and it would be nice to see if people are connected or not before "flipping the switch".
Any help would be greatly appreciated...
Thanks,
Wali
The following article shows how you can use Session_Start and Session_End of the Global Application Class to count the number of active sessions:
How to show number of online users / visitors for ASP.NET website?
In your search, consider using keywords like
perfmon asp.net sessions
Intel has a good article. Unfortunately, it's 404 at the moment, but Google cache has a nice copy. Original link to the Intel "Using perfmon to tune n-tier .NET applications"
When your WCF service crashes, there are likely to be entries in the Windows event log. If not, then the service should be doing logging on its own. I suggest you look and find out whether the service may not have been telling you wnat's wrong.
Got reports of a web app going down twice in three weeks. Need to do some root cause analysis. works fine after a reboot. I'm not really an expert in this field.
It is hosted on IIS and Windows 2003.
There is nothing interesting in the event viewer, and IIS logs just show lots of successful GET operations. There is nothing interesting in SQL logs on the remote SQL server it connects to.
I'm not sure how to decipher the IIS log. It just looks like a bunch of successful GET messages with no errors.
I don't think I can really get too much further with root cause analysis track down the cause of the issue?
The only thing you could try to get some real results is this excellent blog by Tess Ferrandez. I think that you will find crash lab very enlightening :)
Take a look at this, it might help you find the app shutdown cause.
Depending on your traffic, twice in three weeks doesn't sound like a lot. The root cause may relate to the fix- if you were able to bring it back up by restarting IIS, it could be a memory leak. If you had to restart the server, it could be a deeper problem.