Thank you for your response and I apologize if my initial explanation wasn't
clear. The applications will be running on identical hardware (see specs.
below) but each application will be running on a dedicated system. My original
spreadsheet had this information but it obviously didn't come through
correctly. I would like to tune the XFS file systems to accommodate the two
different applications. As I mentioned before, I experimented with various
parameters (e.g. sunit, swidth, log size, etc.) and different mounting options
(e.g. logbufs, logbsize, etc.), but it sounds like I may have been wasting my
time attempting to benchmark the file systems. Any information or
recommendations you can provide would be greatly appreciated. Also, can you
recommend a tool that would be good for benchmarking an XFS file system (if one
exists)? Thanks again!
Motherboard: Supermicro X8DTU
Chipset: Intel 5520 (Tylersburg)
Processors: Dual Intel Xeon E5540 @2.53GHz
RAM: 32GB PC3-8500 1066MHz
OS: CentOS 5.3
RAID Controller: 3ware 9650SE-12M
Disk Type: SATA
Disk Size: 1.82 TB
RAID Level: 6
# of disks: 11
Stripe Size: 256 KB
File System Size: 16.37 TB
XFS Info: kmod-xfs-0.4-2, xfsprogs-2.9.4-1.el5.centos
> Message: 1
> Date: Sat, 23 Oct 2010 22:38:25 -0500
> From: Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>
> Subject: Re: XFS Test Results Interpretation
> To: xfs@xxxxxxxxxxx
> Message-ID: <4CC3AA31.2000101@xxxxxxxxxxxxxxxxx>
> Content-Type: text/plain; charset=ISO-8859-1
> Andrew Debenham put forth on 10/23/2010 9:59 PM:
> > I am in the process of trying to determine the best parameters to use when
> > creating and mounting an XFS file system on some new hardware we are going
> > to be using. My company has two separate applications that will
> > be running on the same hardware (but on separate systems). One application
> > is the PostgreSQL database and the other is a custom application that does
> > writes to many (~1,000) relatively small (~672MB) files
> Post the detailed hardware specs (server, local RAID or SAN, number of disks
> in stripe set, RAID level, etc), and if both applications are running on the
> same physical machine or different machines. Are both apps writing to > the
> same XFS filesystem or two different filesystems?
> Your description of "what is where" was very confusing.
> Oh, and Bonnie++ test results are usually useless, as well as IOZone, etc.
> Next time ask before taking the time to run benchmarks and jump through hoops
> to get the data onto the list. :)
> -- Stan
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