Re: Extremely slow metadata performance

2013-12-07 Thread Kai Krakow
Marc MERLIN schrieb: > I'm one of those people who uses cp -al and rsync to do backups. Indeed > I should likely rework the flow to use subvolumes and snapshots. > You also mentioned reflinks, and it sounds like I can use > cp -a --reflink instead of cp -al. > > Also, would the dedupe code in bt

Re: Extremely slow metadata performance

2013-12-07 Thread Marc MERLIN
On Thu, Dec 05, 2013 at 07:39:30PM +, Duncan wrote: > John Goerzen posted on Thu, 05 Dec 2013 11:52:04 -0600 as excerpted: > > > Hello, > > > > I have observed extremely slow metadata performance with btrfs. This may > > be a bit of a nightmare scenario; it

Re: Extremely slow metadata performance

2013-12-06 Thread John Goerzen
On 12/05/2013 05:32 PM, Russell Coker wrote: On Thu, 5 Dec 2013 11:52:04 John Goerzen wrote: > I have observed extremely slow metadata performance with btrfs. This may > be a bit of a nightmare scenario; it involves untarring a backup of > 1.6TB of backuppc data, which contains mi

Re: Extremely slow metadata performance

2013-12-05 Thread John Goerzen
On 12/05/2013 05:32 PM, Russell Coker wrote: On Thu, 5 Dec 2013 11:52:04 John Goerzen wrote: > I have observed extremely slow metadata performance with btrfs. This may > be a bit of a nightmare scenario; it involves untarring a backup of > 1.6TB of backuppc data, which contains mi

Re: Extremely slow metadata performance

2013-12-05 Thread Russell Coker
On Thu, 5 Dec 2013 11:52:04 John Goerzen wrote: > I have observed extremely slow metadata performance with btrfs. This may > be a bit of a nightmare scenario; it involves untarring a backup of > 1.6TB of backuppc data, which contains millions of hardlinks and much > data, onto USB 2.0

Re: Extremely slow metadata performance

2013-12-05 Thread Duncan
John Goerzen posted on Thu, 05 Dec 2013 11:52:04 -0600 as excerpted: > Hello, > > I have observed extremely slow metadata performance with btrfs. This may > be a bit of a nightmare scenario; it involves untarring a backup of > 1.6TB of backuppc data, which contains millions of har

Extremely slow metadata performance

2013-12-05 Thread John Goerzen
Hello, I have observed extremely slow metadata performance with btrfs. This may be a bit of a nightmare scenario; it involves untarring a backup of 1.6TB of backuppc data, which contains millions of hardlinks and much data, onto USB 2.0 disks. I have run disk monitoring tools such as dstat