Re: [HPDD-discuss] Strange Issue, No space left, where there, actually over 500TB
Is background file redistribution/OST balancing on the roadmap for lustre ?
This would would be _very_ useful for capacity expansion of existing
lustre installations.
regards,
chris hunter
yale hpc group
Date: Mon, 1 Jun 2015 22:59:03 +0000
From: "Dilger, Andreas" <andreas.dilger(a)intel.com>
Subject: Re: [HPDD-discuss] Strange Issue, No space left, where there
actually over 500TB
Check the striping on the files reporting ENOSPC with "lfs getstripe" to see if
they are on the full OSTs. Appending to existing files will not move them to OSTs with
more space, only new files will avoid the full OSTs.
Even better is to avoid having 100% full OSTs in the first place, since that causes
serious file fragmentation as the last available blocks are allocated to files.
Cheers, Andreas
--
Andreas Dilger
Lustre Software Architect
Intel High Performance Data Division