Re: Building New Server - What RAID should be used and how to divi
It is a transactional database that is also used for reporting. It also
doesn't have the best designed.
"Ekrem Önsoy" wrote:
> I agree with Andrew from the start to the end of his message.
>
> He also told you some from Best Practices, however, best practices may not
> apply your environment. We do not even know if your databases is OLAP or
> OLTP, I think it would be right to say "You should determine this first of
> all"
>
> --
> Ekrem Önsoy
>
>
>
> "Andrew J. Kelly" <sqlmvpnooospam@shadhawk.com> wrote in message
> news:%23a6X1rsCIHA.1188@TK2MSFTNGP04.phx.gbl...
> > Don't take this the wrong way but why is he asking you to come up with
> > something that you admit you know nothing about? There are a lot of
> > factors to consider and we don't have enough information to give you the
> > best answer for your situation. He should contract someone who does know
> > how to get to the bottom of this so that you make the correct decision and
> > do it right the first time. But some basics are:
> >
> > Don't confuse a Logical drive with a Physical drive or array. Creating
> > multiple Logical drives such as C:, D: & E: on one physical array does
> > nothing for performance but gives false impressions of files residing on
> > different drives.
> >
> > Never use Raid 0 if you are concerned with data loss.
> >
> > Raid 5 should only be considered if there is mostly Read activity or very
> > low write activity. Raid 10 is a better choice for data files.
> >
> > RAID 1 is a starting point for Log files. Heavy systems may need Raid 10
> >
> > Never mix Log files with Data files. You can get away with adding multiple
> > log files to a single Raid 1 but never put data files on it.
> >
> > Use a Raid 1 for the OS and sql binaries. If the usage is low enough you
> > can usually get by with placing the log files on this array as well.
> > --
> > Andrew J. Kelly SQL MVP
> > Solid Quality Mentors
> >
> >
> > "lcerni" <lcerni@discussions.microsoft.com> wrote in message
> > news:A36B636F-D433-40E6-8EF6-B70AFB929907@microsoft.com...
> >> Building New Server - What RAID should be used and how to divide the
> >> files
> >> among the disk drives?
> >>
> >> Ok. I admit I am completely confused. I am being asked to research for
> >> a
> >> new server. My manager wants to know how many drives are needed
> >> depending on
> >> the RAID. Currently our organization is using RAID-5. However, I am not
> >> sure how to split up the data files and transactional logs.
> >>
> >> Should the master, msdb, model data files be on drive e?
> >> Should the master, msdb, model log files be on drive g?
> >> Or should each database data file be on its own drive and each database
> >> log
> >> file on another drive?
> >> Or should all the data files be on one drive and the log files on a
> >> second
> >> drive?
> >> What about tempdb? Should the tempdb data file be on one drive separate
> >> from the others and its log file on a drive separate from the other log
> >> files? Also I think that I read that tempdb should be on RAID 0; that it
> >> can
> >> be on a separate RAID from the other files? Is this true?
> >>
> >> This is an example that I have put together. I don't know how
> >> correct/not
> >> correct it is though.
> >> c: operating system ?
> >> d: data files for all user databases ?
> >> e: data files for all system databases ?
> >> f: log files for all user databases ?
> >> g: log files for all system databases ?
> >> h: tempdb data file RAID 0
> >> i: tempdb log file RAID 0
> >>
> >> He made a remark that he thought that we might need about 16 drives? I
> >> am
> >> not sure I understand the relationship between the drives and RAID. I am
> >> wondering if I am misunderstanding him.
> >>
> >> How do most people have their servers set up?
> >>
> >> Are there recommendations which files should be what RAID?
> >>
> >
>
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