[gpfsug-discuss] Data replication and fileset quotas

[Simon Thompson (Research Computing - IT Services)]

Yes, this correct (I think there was some discussion on the mailing list a little while back).

The quota is the space used on disk, so if you run compression its the compressed size, tape hsm don't count until you recall them.

I assume mcstore is the same, I.e. Only counts on recall, but I haven't tested this.

Simon

--

Simon Thompson

Research Computing Team, IT Services

+44 121 415 8675

-----Original Message-----
From: Bryan Banister [bbanister at jumptrading.com<mailto:bbanister at jumptrading.com>]
Sent: Tuesday, May 03, 2016 09:33 PM GMT Standard Time
To: gpfsug main discussion list
Subject: Re: [gpfsug-discuss] Data replication and fileset quotas

Yes, I believe that is the case due to the fact that every file is replicated therefore taking twice as much space within the file system.
-Bryan

From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Buterbaugh, Kevin L
Sent: Tuesday, May 03, 2016 3:27 PM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: [gpfsug-discuss] Data replication and fileset quotas

Hi again all,

I have another question on a completely different topic and therefore I decided it was better to send two separate e-mails.

For a number of years now we have had a GPFS filesystem where we use filesets and set fileset quotas.  Data replication is set to one.  I understand how that all works.

We are creating another GPFS filesystem where we intend to also use filesets and fileset quotas, but set data replication to two.  Based on my experience with data replication on a filesystem that doesn’t use filesets, I am expecting that setting data replication to two means that I will need to double the quota for each fileset (i.e. if a group has bought 5 TB of space I’ll need to set their fileset quota to 10 TB) but haven’t found where that is explicitly documented.  Is that correct?

Thanks again, all…

Kevin

—
Kevin Buterbaugh - Senior System Administrator
Vanderbilt University - Advanced Computing Center for Research and Education
Kevin.Buterbaugh at vanderbilt.edu<mailto:Kevin.Buterbaugh at vanderbilt.edu> - (615)875-9633




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