Monday, June 29, 2015

SQL Replication - Subscriber On Different Domain

Setting up SQL Server replication with publisher / distributor on one domain and subscriber on another domain could be tricky. It could be even more interesting when these servers have the same host name. This blog post discuss issues encountered and the steps of addressing them.

Thursday, June 25, 2015

SQL Server Replication - Case Study & Implementation

This post discuss of evaluating a business case, with designing and implementing SQL Server replication in a step-by-step tutorial to address the requirement.

Friday, June 19, 2015

Powershell Password Encryption & Decryption

One of the common task in Powershell script design and execution is credential encryption requirement. Some privileged account is used and its credential need to pass to the script in order to access resources. It becomes crucial especially when the execution tasks are being delegated to other users or being automated. As storing the password as clear text is huge security risk and the last thing desired, here in this blog post we discuss a few options on storing the credential securely.

Tuesday, May 5, 2015

Query Hint and Plan Guide

Query execution plan generated for a SQL query significantly affect the query performance. Parameter sniffing, indexes, statistics and other factors are taken into consideration for SQL Server query optimizer to produce an optimal query plan for the execution within a timely manner. Sometimes, due to certain scenarios and limitation, the query plan generated may be suboptimal. There are multiple ways to address this problem, like modifying the way the query is written, or using query hint or even plan guides under certain circumstances. This blog post discuss an example of using a query hint as well as plan guide.

Monday, March 30, 2015

Query Performance Tuning Example

As DBA, application performance issue and complaints often thrown our way. It is often fun to troubleshoot those performance issue. When it has been identified that the problem lies on SQL Server, it get even more exciting. Here is one of the example of how I tuned a query a while ago and also some lessons learned.