Applications that perform asynchronous cached I/O read requests and that use a disk array that has multiple spindles may encounter a low performance issue in Windows Server 2008, in Windows Essen …

January 17, 2012 by admin · Leave a Comment 

Symptoms
Consider the following scenario:You have a storage area network (SAN) disk array or a direct attached storage (DAS) disk array that has multiple spindles.The disk array is installed on a computer that has one of the following Microsoft Windows operating systems installed:Windows Server 2008Windows Essential Business Server 2008Windows Vista Service Pack 1 (SP1)An application uses the disk array to perform concurrent asynchronous I/O requests on this computer.In this scenario, the application may have very low I/O read performance.
For example, you run SQL Server Analysis Service (SSAS) for an OLAP query on a Windows Server 2008-based computer. This computer has a disk array that supports concurrent I/O reads. SSAS uses 20 spindles to perform an asynchronous I/O read. In this example, you may find that the OLAP query performance in the Windows Server 2008 system is very low and that the system seems to have only 2 spindles working on the I/O request.
Resolution
This problem occurs because of the asynchronous I/O mechanism in Windows Server 2008. When an I/O request is made, the asynchronous I/O mechanism in Windows Server 2008 performs the following steps:The cache manager finds that one of the pages that are required for the transfer is not resident in memory.The cache manager notifies NTFS that the page is not in memory.NTFS queues the page read and write request to its internal work queue and then returns STATUS_PENDING to the calling thread.NTFS only uses both worker threads to process its internal work queue. Because only the two worker threads are used, you encounter the performance issue.

“0x0000007E” Stop error when you run a VSS-based backup application in Windows 7 or in Windows Server 2008 R2

June 29, 2011 by admin · Leave a Comment 

Symptoms
When you run a backup application that uses Volume Shadow Copy Service (VSS) snapshots on a computer that is running Windows 7 or Windows Server 2008 R2, you receive an error message that resembles the following:

STOP: 0x0000007E ( parameter1 , parameter2 , parameter3 , parameter4 )
SYSTEM_THREAD_EXCEPTION_NOT_HANDLEDNotesThe parameters in this error message vary, depending on the configuration of the computer.Not all “0x0000007E” Stop errors are caused by this issue.For example, this issue may occur when you use Microsoft System Center Data Protection Manager (DPM) to run a synchronization job that has a consistency check and that has a scheduled recovery point creation.?

Resolution
This issue occurs because of a race condition in the Volume Shadow Copy Service (VSS) driver (Volsnap.sys).

Hotfix: Hyper-V Dynamic Memory does not work on a Windows Server 2008 Standard Edition or Windows Web Server 2008 virtual machine (VM)

May 31, 2011 by admin · Leave a Comment 

Symptoms
When Dynamic Memory is enabled for a virtual machine system that is running one of the following operating systems, the memory of the virtual machine does not increase after the virtual machine is started.?Windows Server 2008 Standard Edition Service Pack 2?(SP2)Windows Server 2008 Standard Edition Server Core SP2Windows Web Server 2008 SP2?Windows Web Server 2008 Server Core SP2?
Resolution
This issue occurs because previously memory addition enlightenment that is required for Dynamic Memory was not support on these operating systems.

FIX: Error message when you perform a piecemeal restore operation after you enable vardecimal database compression in SQL Server 2005 Service Pack 2: “Piecemeal restore is not supported when an u …

April 21, 2011 by admin · Leave a Comment 

Symptoms
This article describes the following about this hotfix release:The issues that are fixed by the hotfix packageThe prerequisites for installing the hotfix packageWhether you must restart the computer after you install the hotfix packageWhether the hotfix package is replaced by any other hotfix packageWhether you must make any registry changesThe files that are contained in the hotfix package
Resolution
Consider the following scenario. You enable vardecimal database compression for a database in Microsoft SQL Server 2005 Service Pack 2 (SP2). You perform a piecemeal restore operation on the database. In this scenario, you receive error messages that resemble the following:
Error message 1

The file ‘FileName’ of restored database ‘DatabaseName’ is being left in the defunct state because the database is being upgraded from a prior version. Piecemeal restore is not supported when an upgrade is involved.
Error message 2

Msg 3149, Level 16, State 3, Line 4
The file or filegroup “FileGroupName” is not in a valid state for the “Recover Data Only” option to be used. Only secondary files in the OFFLINE or RECOVERY_PENDING state can be processed.After the operation fails, the file group may be marked as defunct.

SEO Marketing From the SEO Service Providers

March 29, 2011 by admin · Leave a Comment 

Honours quantify callers are usually allowed released audience. The principal clinical of SEO operate providers is to alter a computer’s place ranking. The SEO accompany could act a specific conjugation or the total SEO marketing aggregation. In any soul, these services require the hiring of highly accomplished web marketing experts who are tasked to canvass the needs of the guest and what SEO marketing strategies would someone suit a specific client.
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