[OpenIndiana-discuss] ZFS storage best practices

[LaoTsao]

IMHO, exadata cell in oracle rac is very different beast, not sure your iozone test make any sense

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Hung-Sheng Tsao ( LaoTsao) Ph.D

On May 28, 2011, at 2:07 PM, Gary <gdriggs at gmail.com> wrote:

> On 5/27/11, Dan Swartzendruber wrote:
>> It all depends, I guess.  Some people get better performance with iSCSI,
>> others with NFS.  The big advantage of going NFS is that the OI server
>> can back up user data by snapshotting the zfs filesystem on the OI
>> server (this is not the only kind of backup you want, of course...)
> 
> This is largely dependent on your infrastructure, file sizes, usage
> patterns, applications, etc. At the office I'm in the middle of an
> extensive comparison benchmarking analysis using iozone and the Excel
> spreadsheet that I gladly bought from the author (I'll try the free
> gnuplot scripts eventually). The presentation is slightly different
> under LibreOffice but the data is still the same and I'd be glad to
> post my files on DropBox for others to peruse if there's any interest.
> Here's what I'm testing with...
> 
> Cisco:
> Nexus series (can't recall which)
> 
> NetApp:
> ONTAP 8.0.1 p2 - soon to be p3 with 10G ethernet ports
> 
> VMware:
> Linux (CentOS) and Solaris x86 under VMware
>  (10G backend from the cluster to storage but the virtual devices
> limit it to 1G)
> 
> Solaris:
> Solaris 10 on M5000 with 10G
>  (have to check which sol update it's using but it was fully patched
> on our last quarterly cycle)
> 
> Exadata X2-2:
>  (40G Infiniband to cell storage in the rack)
> 
> 
> I started on the Linux side with VMware hosts and so far I've tested
> iSCSI single disk and mirrored volumes using soft RAID and LVM2 under
> CentOS. I also tested NFSv3 and ran one test on the Exadata cell
> storage. But I plan on moving to Solaris and Linux variants of NFSv4,
> Oracle DirectNFS, and possibly some 8G fibre channel LUNs as well.
> Eventually, I'd like to throw in a recent release of OI but it may
> have to be run under VMware unless I can find some spare hardware or
> the SPARC release comes out by then. Also, each of my tests take about
> a half a day to run because I'm scaling all the way up to 16G file
> sizes. I'm using non-prod infrastructure so I can start most of them
> during the day but even our dev Exadata nodes are starting to get some
> use during business hours that necessitates running in the evenings
> and weekends.
> 
> -Gary
> 
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