Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-23 Thread Dave Chinner
On Wed, Apr 23, 2014 at 11:21:54AM +0200, Ivan Pantovic wrote: > Hi Dave, > > >xfs_db> freesp > > from to extents blockspct > > 1 1 52463 52463 0.00 > > 2 3 73270 181394 0.01 > > 4 7 134526 739592 0.03 > > 8 15 250469 2870193

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-23 Thread Ivan Pantovic
Hi Dave, xfs_db> freesp from to extents blockspct 1 1 52463 52463 0.00 2 3 73270 181394 0.01 4 7 134526 739592 0.03 8 15 250469 2870193 0.12 16 31 581572 13465403 0.58 32 63 692386 32096932

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-23 Thread Dave Chinner
On Wed, Apr 23, 2014 at 09:23:41AM +0200, Ivan Pantovic wrote: > > >[root@drive-b ~]# xfs_db -r /dev/md0 > >xfs_db> frag > >actual 11157932, ideal 11015175, fragmentation factor 1.28% > >xfs_db> > > this is current level of fragmentation ... is it bad?

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-23 Thread Ivan Pantovic
[root@drive-b ~]# xfs_db -r /dev/md0 xfs_db> frag actual 11157932, ideal 11015175, fragmentation factor 1.28% xfs_db> this is current level of fragmentation ... is it bad? some say over 1% is candidate for defrag? ... we can leave it like this and wait for a next full backup and then check

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-23 Thread Dave Chinner
On Wed, Apr 23, 2014 at 11:21:54AM +0200, Ivan Pantovic wrote: Hi Dave, xfs_db freesp from to extents blockspct 1 1 52463 52463 0.00 2 3 73270 181394 0.01 4 7 134526 739592 0.03 8 15 250469 2870193 0.12 16

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-23 Thread Ivan Pantovic
[root@drive-b ~]# xfs_db -r /dev/md0 xfs_db frag actual 11157932, ideal 11015175, fragmentation factor 1.28% xfs_db this is current level of fragmentation ... is it bad? some say over 1% is candidate for defrag? ... we can leave it like this and wait for a next full backup and then check

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-23 Thread Dave Chinner
On Wed, Apr 23, 2014 at 09:23:41AM +0200, Ivan Pantovic wrote: [root@drive-b ~]# xfs_db -r /dev/md0 xfs_db frag actual 11157932, ideal 11015175, fragmentation factor 1.28% xfs_db this is current level of fragmentation ... is it bad?

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-23 Thread Ivan Pantovic
Hi Dave, xfs_db freesp from to extents blockspct 1 1 52463 52463 0.00 2 3 73270 181394 0.01 4 7 134526 739592 0.03 8 15 250469 2870193 0.12 16 31 581572 13465403 0.58 32 63 692386 32096932

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-22 Thread Dave Chinner
[cc x...@oss.sgi.com] On Mon, Apr 21, 2014 at 10:58:53PM +0200, Speedy Milan wrote: > I want to report very slow deletion of 24 50GB files (in total 12 TB), > all present in the same folder. total = 1.2TB? > OS is CentOS 6.4, with upgraded kernel 3.13.1. > > The hardware is a Supermicro server

Re: rm -f * on large files very slow on XFS + MD RAID 6 volume of 15x 4TB of HDDs (52TB)

2014-04-22 Thread Dave Chinner
[cc x...@oss.sgi.com] On Mon, Apr 21, 2014 at 10:58:53PM +0200, Speedy Milan wrote: I want to report very slow deletion of 24 50GB files (in total 12 TB), all present in the same folder. total = 1.2TB? OS is CentOS 6.4, with upgraded kernel 3.13.1. The hardware is a Supermicro server with