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AFM, fileset snapshots and some other features can only be used with independent filesets. Thus GPFS customers are advised to prefer them over dependent filesets.
But GPFS has a hardcoded limit of 1000 independent filesets per filesystem which is too low for some use cases.
According to GPFS development this limit is arbitrary and has no technical reason.
Please increase the limit.
Idea priority | High |
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Due to processing by IBM, this request was reassigned to have the following updated attributes:
Brand - Servers and Systems Software
Product family - IBM Spectrum Scale
Product - Spectrum Scale (formerly known as GPFS) - Public RFEs
Component - Product functionality
For recording keeping, the previous attributes were:
Brand - Servers and Systems Software
Product family - IBM Spectrum Scale
Product - Spectrum Scale (formerly known as GPFS) - Public RFEs
Component - V4 Product functionality
This issue is addressed by an already existing RFE.
Creating a new RFE based on Community RFE #85282 in product Spectrum Scale (formerly known as GPFS) - Public RFEs.
At the Leibniz Supercomuting Centre we see several use cases where the number of 1000 independent filesets is a limitation, at least in the midterm. This is first using it together with Openstack and Manial as "Cloud Network Filer" in a mid to large scale Openstack environment, we currently plan.
And second using it as Long Term HPC Project Storage in SuperMUC NG where we want (to continue) to deploy an independent fileset for each HPC Project. This schema we already use for SuperMUC and have already 800 independet filesets deployed. On SuperMUC NG we will definitely cross the 1000 boundery.
We suggest a new "limit" in the range between 10000 to 20000.
The issue has already been discussed with GPFS 3rd level support and people from development. There are several major GPFS customers which run into problems because of the fileset limit.