Re: Spread table.
- From: Rogers <Rogers@xxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Thu, 31 Mar 2005 08:05:02 -0800
Thanks for your reply but the question is how can I set one table into
separate file and I will devide that files into three different physical
drive but I wanna know how can I split one table into three different files.
Thanks
"Andrew J. Kelly" wrote:
> This is not true for SQL 2000 and above. It used to be in 7.0 that a single
> thread was used per file. In 2000 it can use multiple threads on a single
> file. 10 million rows is not a lot and you don't gain much by creating
> multiple files unless each file is on a separate drive array. Not a
> separate Logical drive but a physical drive. But on a fast array such as a
> Raid 10 and with multiple processors Sql Server can use multiple threads to
> read a single file in parallel.
>
> --
> Andrew J. Kelly SQL MVP
>
>
> "Rogers" <Rogers@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
> news:98DB88E9-DEFB-49AB-8DED-ED11C6F9A6B9@xxxxxxxxxxxxxxxx
> > If your database is very large and very busy, multiple files can be used
> > to
> > increase performance. Here is one example of how you might use multiple
> > files. Let's say you have a single table with 10 million rows that is
> > heavily
> > queried. If the table is in a single file, such as a single database file,
> > then SQL Server would only use one thread to perform a sequential read of
> > the
> > rows in the table. But if the table were divided into three physical files
> > (all part of the same filegroup), then SQL Server would use three threads
> > (one per physical file) to sequentially read the table, which potentially
> > could be much faster. In addition, if each file were on its own separate
> > disk
> > or disk array, the performance would even be greater.
> >
> > Can any one let me know how can I spread one large table into three
> > different files.
>
>
>
.
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