[gpfsug-discuss] gpfs native raid

[Daniel Kidger]

Aaron,
   
    GNR is a key differentiator for IBM's (and Lenovo's) Storage hardware appliance.
    ESS and GSS are otherwise commodity storage arrays connected to commodity NSD servers, albeit with a high degree of tuning and rigorous testing and validation.
    This competes with equivalent DDN and Seagate appliances as well other non s/w Raid offerings from other IBM partners. GNR only works for a small number of disk arrays and then only in certain configurations. GNR then might be thought of as 'firmware' for the hardware rather than part of a software defined products at is Spectrum Scale.
    
    If you beleive the viewpoint that hardware Raid 'is dead' then GNR will not be the only s/w Raid that will be used to underly Spectrum Scale. As well as vendor specific offerings from DDN, Seagate, etc. ZFS is likely to be a popular choice but is today not well understood or tested. This will change as more 3rd parties publish their experiences and tuning optimisations, and also as storage solution vendors bidding Spectrum Scale find they can't compete without a software Raid component in their offering. 
    
    
    Disclaimer: the above are my own views and not necessarily an IBM official viewpoint.
  
  Daniel
  
  IBM Spectrum Storage Software
  +44 (0)7818 522266
  Sent from my iPad using IBM Verse
  
  
  On 30 Aug 2016, 18:17:01, aaron.s.knister at nasa.gov wrote:
  
  From: aaron.s.knister at nasa.gov
  To: gpfsug-discuss at spectrumscale.org
  Cc: 
  Date: 30 Aug 2016 18:17:01
  Subject: Re: [gpfsug-discuss] gpfs native raid
  
  
     Thanks Christopher. I've tried GPFS on zvols a couple times and the 
   write throughput I get is terrible because of the required sync=always 
   parameter. Perhaps a couple of SSD's could help get the number up, though.
   -Aaron
   On 8/30/16 12:47 PM, Christopher Maestas wrote:
   > Interestingly enough, Spectrum Scale can run on zvols. Check out:
   >
   > http://files.gpfsug.org/presentations/2016/anl-june/LANL_GPFS_ZFS.pdf
   >
   > -cdm
   >
   > ------------------------------------------------------------------------
   > On Aug 30, 2016, 9:17:05 AM, aaron.s.knister at nasa.gov wrote:
   >
   > From: aaron.s.knister at nasa.gov
   > To: gpfsug-discuss at spectrumscale.org
   > Cc:
   > Date: Aug 30, 2016 9:17:05 AM
   > Subject: [gpfsug-discuss] gpfs native raid
   >
   > Does anyone know if/when we might see gpfs native raid opened up for the
   > masses on non-IBM hardware? It's hard to answer the question of "why
   > can't GPFS do this? Lustre can" in regards to Lustre's integration with
   > ZFS and support for RAID on commodity hardware.
   > -Aaron
   > --
   > Aaron Knister
   > NASA Center for Climate Simulation (Code 606.2)
   > Goddard Space Flight Center
   > (301) 286-2776 <tel:(301)%C2%A0286-2776>
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   -- 
   Aaron Knister
   NASA Center for Climate Simulation (Code 606.2)
   Goddard Space Flight Center
   (301) 286-2776
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