Hello,
I'm working on a project that uses over a hundred XLSs for transforming xml
documents. The project consists of several webservices (IIS) calling a few
dlls. This dlls make the business logic and are the ones that do the
transformation, so the XLSs are used by these dlls. Right now we have the
XSLs files on hard disk. This means there is lots of reading from disk. Since
reading from disk is much slower than reading from memory I am looking for a
way to keep them in memory.
Any Ideas?
Will IIS cache them? How? (Keep in mind they are used by the dlls)
I also was thinking simple work around. Using a RAM Disk, but it seems
Windows 2003 server does not support RAM Disks.
Any help?
Thanks.
15  2179 
Alexis wrote: I'm working on a project that uses over a hundred XLSs for transforming xml
documents. The project consists of several webservices (IIS) calling a few
dlls. This dlls make the business logic and are the ones that do the
transformation, so the XLSs are used by these dlls. Right now we have the
XSLs files on hard disk. This means there is lots of reading from disk. Since
reading from disk is much slower than reading from memory I am looking for a
way to keep them in memory.
Any Ideas?
Will IIS cache them? How? (Keep in mind they are used by the dlls)
I also was thinking simple work around. Using a RAM Disk, but it seems
Windows 2003 server does not support RAM Disks.
Just cache loaded XslTransform objects in cache instead of loading them
for each request. XslTransform.Tr ansform() method is thread-safe, so
once XslTransaform object is created and Load() method has been called,
it's safe to run Transform() method in many threads.
--
Oleg Tkachenko [XML MVP, MCP] http://blog.tkachenko.com
Thanks Oleg
Can you tell me how to cache the XslTransform?
Can you send me sample code of the first call that do the cache and the
other calls that will use the cache objets.?
Thanks again
Alexis
"Oleg Tkachenko [MVP]" wrote: Alexis wrote:
I'm working on a project that uses over a hundred XLSs for transforming xml
documents. The project consists of several webservices (IIS) calling a few
dlls. This dlls make the business logic and are the ones that do the
transformation, so the XLSs are used by these dlls. Right now we have the
XSLs files on hard disk. This means there is lots of reading from disk. Since
reading from disk is much slower than reading from memory I am looking for a
way to keep them in memory.
Any Ideas?
Will IIS cache them? How? (Keep in mind they are used by the dlls)
I also was thinking simple work around. Using a RAM Disk, but it seems
Windows 2003 server does not support RAM Disks.
Just cache loaded XslTransform objects in cache instead of loading them
for each request. XslTransform.Tr ansform() method is thread-safe, so
once XslTransaform object is created and Load() method has been called,
it's safe to run Transform() method in many threads.
--
Oleg Tkachenko [XML MVP, MCP]
http://blog.tkachenko.com
Alexis wrote: Can you tell me how to cache the XslTransform?
Can you send me sample code of the first call that do the cache and the
other calls that will use the cache objets.?
If you are talking about ASP.NET, you can use standard caching methods.
Take a look at http://msdn.microsoft.com/library/de...netchapt09.asp
for a sample.
--
Oleg Tkachenko [XML MVP, MCP] http://blog.tkachenko.com
Thanks again.
I read the article but they are using the Application object to store the
cached objects. But as I said in the first question the transformation is
done by a Dll so I don't have access to the Application Object there.
Do you know of a method of caching without using the Application object?
More specific caching from a Dll.
You can read again the first question to understand better the problem I am
having.
Thanks again.
"Oleg Tkachenko [MVP]" wrote: Alexis wrote:
Can you tell me how to cache the XslTransform?
Can you send me sample code of the first call that do the cache and the
other calls that will use the cache objets.?
If you are talking about ASP.NET, you can use standard caching methods.
Take a look at
http://msdn.microsoft.com/library/de...netchapt09.asp
for a sample.
--
Oleg Tkachenko [XML MVP, MCP]
http://blog.tkachenko.com
On Mon, 21 Mar 2005 06:59:04 -0800, Alexis wrote: I also was thinking simple work around. Using a RAM Disk, but it seems
Windows 2003 server does not support RAM Disks.
There's no RAM disk driver *shipped* with Windows 2000 and above, but there
are many third-party RAM disk drivers available that will work. Seek (on
Google) and ye shall find.
On Tue, 22 Mar 2005 09:37:04 -0800, Alexis wrote: But as I said in the first question the transformation is
done by a Dll so I don't have access to the Application Object there.
Your original post said the DLL will be called by a web service. So there
ultimately is an Application object available, which your DLL can access
with this:
HttpContext.Cur rent.Applicatio nInstance
Or, if you don't mind if your XSL objects are occasionally flushed from the
cache and will be reloaded, you can make more direct use of the ASP.NET
Cache this way:
HttpContext.Cur rent.Cache
Alexis wrote: I read the article but they are using the Application object to store the
cached objects. But as I said in the first question the transformation is
done by a Dll so I don't have access to the Application Object there.
Do you know of a method of caching without using the Application object?
Quick and dirty cache is just plain Hashtable. You can make it better
using WeakReferences.
Otherwise take a look at the "Caching Application Block" http://msdn.microsoft.com/library/de...l/caching1.asp
--
Oleg Tkachenko [XML MVP, MCP] http://blog.tkachenko.com
Oleg Thanks again I really appreciate your help
But you are getting me to nowhere. Graet book index but little contect.
Thanks anyway for trying.
"Oleg Tkachenko [MVP]" wrote: Alexis wrote:
I read the article but they are using the Application object to store the
cached objects. But as I said in the first question the transformation is
done by a Dll so I don't have access to the Application Object there.
Do you know of a method of caching without using the Application object?
Quick and dirty cache is just plain Hashtable. You can make it better
using WeakReferences.
Otherwise take a look at the "Caching Application Block"
http://msdn.microsoft.com/library/de...l/caching1.asp
--
Oleg Tkachenko [XML MVP, MCP]
http://blog.tkachenko.com
Ross Thankyou very much.
I have not have time to try it yet but it make a lot of sense. I was just
wondering how efficient it may be. The whole purpose of keeping the XSL files
or objects in memory is to improve performance. Do you know if accessing the
HttpContext from a dll will have some impact on performance?
Thanks a lot again I really appreciate your help.
"Ross Presser" wrote: On Tue, 22 Mar 2005 09:37:04 -0800, Alexis wrote:
But as I said in the first question the transformation is
done by a Dll so I don't have access to the Application Object there.
Your original post said the DLL will be called by a web service. So there
ultimately is an Application object available, which your DLL can access
with this:
HttpContext.Cur rent.Applicatio nInstance
Or, if you don't mind if your XSL objects are occasionally flushed from the
cache and will be reloaded, you can make more direct use of the ASP.NET
Cache this way:
HttpContext.Cur rent.Cache This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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