Additional Articles


Technical Article

RAID Scaling Charts, Part 3: 4-128 kB Stripes Compared

This is the third article that deals with analyzing the various possibilities involving various RAID setups and differing numbers of hard drives. We used the same hard disks again here: eight Samsung HM321KJ SATA/300 drives powered all of the possible RAID 0, RAID 5 and RAID 6 setups, with from three to as many as eight hard drives configured to use stripe sizes of 4 to 128 kB.

2007-12-19

2,353 reads

Technical Article

RAID Scaling Charts, Part 1

Most enthusiast and mainstream users would consider setting up a RAID array mainly for performance reasons - few really care about data safety. For this reason, the majority of arrays installed consists of only two drives, which run a simple RAID 0 stripe set. Haven't you ever asked yourself how these RAID arrays scale as you increase the number of hard drives?

2007-12-17

2,911 reads

Technical Article

Log Shipping with SQL Server 2005

Log shipping has been a mechanism for maintaining a warm standby server for years. Though SQL Server supported log shipping with SQL Server 2000 as a part of DB Maintenance Plan, it has become a built-in feature of SQL Server 2005. This article gives brief introduction to SQL Server 2005 Log Shipping, configuration of it, monitoring of it and failing over at the disaster.

2007-12-13

3,459 reads

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Create an HTML Report on the Status of SQL Server Agent Jobs

By Nisarg Upadhyay

Comments posted to this topic are about the item Create an HTML Report on...

We Should Demand Better

By Steve Jones - SSC Editor

Comments posted to this topic are about the item We Should Demand Better

Estimated Rows

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Estimated Rows

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Question of the Day

Estimated Rows

I have two calls to the GENERATE_SERIES TVF in this code:

SELECT   TOP 10 gs.value
FROM     GENERATE_SERIES(1, 10) AS gs
ORDER BY NEWID ()
OPTION (RECOMPILE);
go
DECLARE @a int = 10;
SELECT   TOP (@a) gs.value
FROM     GENERATE_SERIES(1, @a) AS gs
ORDER BY NEWID ()
OPTION (RECOMPILE);
In the actual query plans, what is the estimated number of rows for each batch?

See possible answers