Failure growing xfs with linux 3.10.5

[Michael Maier]

Stan Hoeppner wrote:
> If you keep growing until you consume the disk, you'll have ~100
> allocation groups.  Typically you'd want to have no more than 4 AGs per
> spindle.  You already have 42 (or 45) which will tend to seek the disk
> to death with many workloads, driving latency through the roof and
> decreasing throughput substantially.  Do you notice any performance
> problems yet?

What are expected rates for copying e.g. a 10GB file? It's a Seagate
Barracuda 3000GB Model ST3000DM001 SATA connected to SATA 6 Gb/s chip.
The source and the destination FS is LUKS crypted. About 3 GB usable RAM
(cache), AMD FX-8350 processor @ max. 3800MHz.

It's getting slower as more as the free space on the fs is reduced
(beginning at about the last GB). Resizing it makes the problem
disappear again.

> Or is this XFS strictly being used as a WORM like backup
> silo?

yes


Thanks,
Michael