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safety Development

Posted: Thu Nov 20, 2008 7:39 am
by cppwxwidgets
what is the issues that i should include in my program so that user can ==> turn of the computer by UNPLUGING THE PC POWER , and the program should not have any problem when the next time it runs

Posted: Thu Nov 20, 2008 2:19 pm
by Auria
have some kind of auto-save to the hard disk on regular intervals... otherwise it's hard to do better

Posted: Fri Nov 21, 2008 9:10 am
by Jorg
Maximum stability can never be achieved. The OS can acknowledge your save action, but may decide to write the data later to disk. So regular interval saving is one thing, but to make sure files do not get corrupted, also backup your last project that succesfully saved before saving a new one. If you use a database, put the database on a seperate server. This way when your machine goes down or your application crashes the database will be safe. If the machine goes down where the database is on, there are backups and transition logs to get it back. So what I am saying don't try too hard to get your application to be safe, most of that is out of your control anyway.

With regards,
- Jorgen

Posted: Sat Nov 22, 2008 4:55 am
by cppwxwidgets
most of that is out of your control anyway.

i heard that linux os (that i am not familier with) can be Configured , what do you think about it? is it possible to configure the linux to provide resource for a program to run in real time mode, or provide some special service for an app

Posted: Sun Nov 23, 2008 11:32 am
by Frank
Use a database that uses ACID and takes care of the write behind cache (of the os and the harddisk controller). Like SQLite.

Unplugging the computer while a transaction is in progress is a common test case for such databases.