That's why I suggested using MSMQ, which can be used to guarantee that the
log messages are not lost or removed until they have been successfully
written.
Obviously there's still the possibility of catastrophic system failure, but
in a case where that matters, there are hardware solutions (RAID et
estions
Regards,
Girish Jain
From: "J. Merrill" <[EMAIL PROTECTED]>
Reply-To: "Discussion of advanced .NET topics."
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: Re: [ADVANCED-DOTNET] Writing data to the beginning of a file
Date: Sat, 19 Nov 2005 16:58:38 -0500
Your
The only real disadvantage of this is that the data is not written to the file
"in real time" -- so it's vaguely possible that some log info could be lost if
there's a very bad crash that shuts down the logging task. (But it's probably
more likely that the disk onto which the data is being writ
: Eric Means <[EMAIL PROTECTED]>
Reply-To: "Discussion of advanced .NET topics."
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: Re: [ADVANCED-DOTNET] Writing data to the beginning of a file
Date: Sat, 19 Nov 2005 08:18:12 -0600
On 11/19/05, Girish Jain <[EMAIL PROTECTED]>
ECTED]>
Reply-To: "Discussion of advanced .NET topics."
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: Re: [ADVANCED-DOTNET] Writing data to the beginning of a file
Date: Sat, 19 Nov 2005 16:58:38 -0500
Your class is multi-thread safe, but not multi-user (on different machi
Your class is multi-thread safe, but not multi-user (on different machines)
safe. If that's your requirement, fine -- just want to make sure that you
realize that the locking won't do anything useful if more than one machine is
writing to the same file with this code. (I am uncertain whether t
On 11/19/05, Girish Jain <[EMAIL PROTECTED]> wrote:
>
> Thanks Ian,
>
> You got it correct, it's the IO cost and time constraint that I am worried
> about. The log file is generated on a daily basis, still the amount of
> data
> that is written to the log file is moderately large.
>
> I want the lo
}
}
public enum LogDirection
{
Beginning = 0, End = 1
}
Thanks
Regards,
Girish Jain
From: Ian Griffiths <[EMAIL PROTECTED]>
Reply-To: "Discussion of advanced .NET topics."
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: Re: [ADVANCED-DOTNET] Writing data to the beginn
18, 2005 11:03 AM
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: Re: [ADVANCED-DOTNET] Writing data to the beginning of a file
But didn't he start off by saying he wanted something better than writing
out the entire file again every time he did an insertion?
Moving to XML doesn't solve
Ian Griffiths wrote:
Could the original poster please tell us: is it the IO costs you're
worried about, or the coding effort?
I thought it was pretty obvious that he was concerned with the IO
costs. How could it be the coding effort if he had already written the
code?
- Seth Sticco
===
On 11/18/05, Jon Rothlander <[EMAIL PROTECTED]> wrote:
>
> My point was that if he designed his own log file format, he can do
> whatever
> he wishes and could use XML for this. Of course, he may not be able to use
> XML if he is not controlling the log file format, which is why I asked the
> quest
But didn't he start off by saying he wanted something better than
writing out the entire file again every time he did an insertion?
Moving to XML doesn't solve that file writing problem.
You can insert stuff into an XML DOM, but the DOM is a data structure in
memory. If you want the file on disk
ovember 18, 2005 11:25 AM
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: Re: [ADVANCED-DOTNET] Writing data to the beginning of a file
Based on his questions, he is not using a windows event log and he seems
to
just be using his own log file design. Nothing in his post says that he
does or does not
opics.
[mailto:[EMAIL PROTECTED] On Behalf Of Steve Johnson
Sent: Friday, November 18, 2005 9:00 AM
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: Re: [ADVANCED-DOTNET] Writing data to the beginning of a file
On 11/18/05, Jon Rothlander <[EMAIL PROTECTED]> wrote:
>
> Can you use XM
You might want to use a BufferedStream (for reading & writing)
when the log file is going to be to large to fit into memory.
The idea is to always write to another file, and rename it afterwards.
using ( FileStream readFs ...)
using ( BufferedStream readBuf( readFS))
using ( FileStream writeFs ...
On 11/18/05, Jon Rothlander <[EMAIL PROTECTED]> wrote:
>
> Can you use XML? If so, you can easily handle this using an XML log file.
>
How?
Steve Johnson
===
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The Windows file system doesn't support "inserting" data, so you have to either
write to the end of the file, or do what you've done and re-write the file with
new data at the front.
If you are able to provide a reader for the log file, you could provide one
that shows the "sections" of the log
I would suggest using a memory-mapped file. You could then do all your
manipulation in memory then have Windows dump the memory back out to the
file.
.NET 1.1 doesn't have inherent support for memory-mapped files; but
there's at least one class that wraps the required PInvoke code:
http://www.win
-DOTNET] Writing data to the beginning of a file
Hi All,
I am writing a log file with the requirement that the latest entry in the
log should be on the top. For the purpose I looked for ways of doing that
but ended up by reading the entire contents of the existing file into a byte
array and then re
r 18, 2005 7:22 AM
To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM
Subject: [ADVANCED-DOTNET] Writing data to the beginning of a file
Hi All,
I am writing a log file with the requirement that the latest entry in the
log should be on the top. For the purpose I looked for ways of doing that
but ended up
putting it back together
Thanks,
Dave
- Original Message -
From: "Girish Jain" <[EMAIL PROTECTED]>
To:
Sent: Friday, November 18, 2005 6:22 AM
Subject: [ADVANCED-DOTNET] Writing data to the beginning of a file
> Hi All,
>
> I am writing a log file with the requir
Hi All,
I am writing a log file with the requirement that the latest entry in the
log should be on the top. For the purpose I looked for ways of doing that
but ended up by reading the entire contents of the existing file into a byte
array and then re-write the file with the new content. Is there
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