[gpfsug-discuss] Asymetric SAN with GPFS

[Simon Thompson]

Surely you would need to use different data pools for this. Given in a single pool data will be distributed over all available nsd devices in that pool, you are highly likely to only ever go as fast as the slowest LUN.

Simon
________________________________________
From: gpfsug-discuss-bounces at spectrumscale.org [gpfsug-discuss-bounces at spectrumscale.org] on behalf of xhejtman at ics.muni.cz [xhejtman at ics.muni.cz]
Sent: 29 July 2019 17:11
To: gpfsug-discuss at spectrumscale.org
Subject: [gpfsug-discuss] Asymetric SAN with GPFS

Hello,

is there any settings for GPFS 5.x so that you could mitigate slow down of
asymmetric SAN? The asymmetric SAN means, that not every LUN has the same
speed, or not every disk array has the same number of LUNs. It seems that
overal speed is degraded to the slowest LUN. Is there any workaround for this
except avoiding that LUN at all?

--
Lukáš Hejtmánek

Linux Administrator only because
  Full Time Multitasking Ninja
  is not an official job title
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