With RAID 10 on four disks you lose 50% of total disk capacity to
parity. If you have four 72GB drives on RAID 10, your usable space
would be 144GB. Note that you see differing levels of read and write
performance depending on the level of RAID that you use. See this link
for a good description of RAID levels:
http://en.wikipedia.org/wiki/RAID#Standard_levels
We are in the same boat. About 150 users, 18 GB database on Vantage 6.
However our database resides on a RAMSAN - basically a storage system
consisting of 32GB of RAM rather than standard hard drive storage - I
assume this offsets our need for RAM in the server somewhat. So far
we've been able to run our current Progress server with only 4GB of
RAM and two dual core Xeon processors and everything is peachy (except
during backups). Our new Vantage 8 server has 8GB of RAM and two quad
core processors. I would not be surprised if we end up needing more
RAM though.
The fun part is that we are running VMware EXSi server on the new
physical server. Therefore our Vantage 8 server is actually a virtual
machine running on top of ESXi. I am hoping to perform a hot clone
(physical to virtual migration) of our Vantage 6 server this weekend
and test performance of the Vantage 6 system on our new hardware. It
should be interesting.
Andy Moss
Data & Network Systems Specialist
Rosenboom Machine & Tool
parity. If you have four 72GB drives on RAID 10, your usable space
would be 144GB. Note that you see differing levels of read and write
performance depending on the level of RAID that you use. See this link
for a good description of RAID levels:
http://en.wikipedia.org/wiki/RAID#Standard_levels
We are in the same boat. About 150 users, 18 GB database on Vantage 6.
However our database resides on a RAMSAN - basically a storage system
consisting of 32GB of RAM rather than standard hard drive storage - I
assume this offsets our need for RAM in the server somewhat. So far
we've been able to run our current Progress server with only 4GB of
RAM and two dual core Xeon processors and everything is peachy (except
during backups). Our new Vantage 8 server has 8GB of RAM and two quad
core processors. I would not be surprised if we end up needing more
RAM though.
The fun part is that we are running VMware EXSi server on the new
physical server. Therefore our Vantage 8 server is actually a virtual
machine running on top of ESXi. I am hoping to perform a hot clone
(physical to virtual migration) of our Vantage 6 server this weekend
and test performance of the Vantage 6 system on our new hardware. It
should be interesting.
Andy Moss
Data & Network Systems Specialist
Rosenboom Machine & Tool
--- In vantage@yahoogroups.com, "Cliff Drumeller" <cliff@...> wrote:
>
> All
> I have never built a RAID 10 before. When you do a RAID 10 with
four
> disks what do you end up with for usable disk space ? If I used four
72
> GB disks would I have 72 GB or 144 GB that are mirrored ?
>
> I have 150 users. 15 GB database on V6x. How much will in grow
> during the conversion to V8 ? How much RAM for the server ? The
Hardware
> sizing doc says 4GB for 40 users and 1 GB per 40 users beyond that.
That
> does make sense in my brain. Also it says to use 1/3 to 1/2 of your
> servers RAM for the database. Sounds like I would need 16 GB of RAM.
> What are you seeing in the real world ?
>
> Cliff Drumeller
> IT Manager
> Mass Precision, Inc.
> 408 786 0348
> 408 314 7420 cell
>
>
>
> [Non-text portions of this message have been removed]
>