MSDTC Distributed Transaction Coordinator Enabling?
Feb 24, 2011
I've a web server and a separate SQL server. I'm trying to use transaction scope to ensure that SQL queries are completed with my linq queries.
I wrap everything with this
using (TransactionScope scope = new TransactionScope())
I want to know where I need to install DTC. Do I need to install it on the IIS 7.5 box AND the SQL server? Do I need to unblock some ports? Are there any security risk in doing so?
I've setup this up once before but don't remember how. If I can't get access to DTC then is there any other way to ensure a lINQ and sql query is atomic?
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Oct 31, 2010
Various tutorials and articles describing the N-tier architecture use the "Open Late Close Early" methodology for Connection objects. The connection is just opened before a "ExecuteNonQuery or ExecuteReader" command, and closed immediately
This means that inside a transaction where a number of business objects have to be updated (using different DAL classes), the connection can be opened and closed many times.
In that case the transaction will be escalated to a distributed transaction. Now we can’t assume that MSDTC will be availableunning every where. Now if I am building a website to be uploaded using those shared web hosting services, which does not allow MSDTC , what are my options ?
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Jun 15, 2010
I've got all of my ASP.NET requests wrapped in a Session and a Transaction that gets commited only at the very end of the request. At some point during execution of the request, I would like to insert an object and make it visible to other potential threads - i.e. split the insertion into a new transaction, commit that transaction, and move on. The reason is that the request in question hits an API that then chain hits another one of my pages (near-synchronously) to let me know that it processed, and thus double submits a transaction record, because the original request had not yet finished, and thus not committed the transaction record.
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I have a web application that will be distributed over 2 servers and the Database will be on a server other than the 2 servers. so application on each server will access database exists in another server.I am using caching in the application and when data changed the cache is cleared and the problem now how each server will feel with cache changes on the other server?
I have tried SQLCache dependency before and i have heard about Memcached, Velocity and Enterprise cache so which one will be more efficient and optimal for this case? and i have another solution to create webservice method on each application and when the cache is cleared in one application it will request the webservice method on the other application to clear cache there.
Which technique is more efficient and optimal in performance and security? and is SQLCache dependency related to SQL database only or can be applicable to other databases like Oracle?
Note: I am using load balancer to distribute requests coming for the application among the 2 server
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Mar 18, 2011
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public class TakeLongTimeToRefresh : ICacheItemRefreshAction
{
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[code]...
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