ms access - Are records removed from mdb file when they are loaded into RAM? -

I was reading this about using a database access network.

My understanding of what he writes is that when records are requested, they are loaded into RAM on the computer that requests them and removes them from the MDB file.

The problem is that if the network goes down, then it can not be reverted as a file record and the database gets corrupted.

What does this really mean? I would have thought that the records would be copied and perhaps the flags kept on those records in the database.

I think the author of the article is likely to be referring to the picture that is:

At the top we see the picture In which the "blocks" of the data are drawn from the disk drive and into the computer RAM.

Then the original record of the course resides on the hard drive. I think the diagram should be "hide" where the holes are. However, it did this way to help explain. So the "original" data + record is not present on the disk drive - they are not deleted.

So this is not the task of pulling the record. This problem actually exists when the record is in your computer RAM (above right) and you modify those records on the left hand "holes" This is showing records that your computer is in RAM that needs to be updated (updates happen in your RAM).

In most cases this connection will not cause corruption in a break time in connection at this point if records are not actually going back from your RAM and then on the hard drive.

However, once the data flow starts, yes, in a Star Trek the connection is very much like a broken transporter and yes, the above picture and diagram tells this issue too much.

So what is the break by pulling the record? No, there is no possibility of corruption being the reason.

Just dragging some records and they are "pending" and they need to be written back? Again a network break at this point should not cause corruption.

However, once the records begin to return their journey, then a break in the network connection is also serious and then yes, which recalls "hole" in the database becomes an issue - corruption is a The real high probability becomes because the "return" records are going to push and rotate existing records on that disk drive.

And will not help in using transactions in access. The main reason for this is that while accessing a file-based back end, the access disk does not record the drive on the drive, but only writes one Windows file, so a file that can include Power Point or Excel or Access data . The computer does not know or ignores what is typing, but only you are writing a file on a disk drive.

Then write Access Zen file with a file-based back end in Windows file. We are working at the file level and not at the record level. It is certainly not that any file level entry corruption is possible when using SQL Server. Entry directly writes in the file, SQL Server does on the server).

So cutting the network connection is like cutting the connection to the disk drive. You are not writing too little by writing as much as you are writing outside the actual file portion on the disk drive.

When using a SQL Server, cutting a network connection means that records running from the admissions client stop, but the actual SQL Server file is written to disk discs and it is never affected. Nor is it cut.

Why Corruption can be, the main issue is that the client side is using the Windows File System on the Internet. It does not come when using server-based technology and you are not affecting the book order system at www.amazon.com if you shut down your computer. When using the server-based system, the exact same logic applies with logging ??? The cutting access does not affect things in favor of the server. You might not be able to send records to the network pipe, but this means that some records are never sent back to save to a local file (but saving the local file is the server side) Not by entry).

This is the use of the Windows File System on the network which is the reason for the risk of corruption. The use of transactions etc. will not help nor will it remove the fact that you are not writing records on disk drives but in fact the fields on track and hard drive FILE level