[mythtv-users] Samba 3 better than NFS 3 for recording over Ethernet

Brad DerManouelian myth at dermanouelian.com
Thu Dec 29 01:37:54 EST 2005

On Dec 28, 2005, at 10:30 PM, Yeechang Lee wrote:

> To make a long story short, my 2.8TB JFS-on-LVM2-on-software RAID 5
> array has certain mysterious performance bottlenecks that result in
> 7.5-10MB/s local write speeds, despite eight spindles and two 3Ware
> 7506 controller cards in JBOD mode and on separate buses and with
> iowait never going above a few percentage points at the very
> most. Over the network that's even slower, of course.

This actually sounds pretty typical of RAID 5 to me. Every write  
results in 2 simultaneous writes. Even slower when you're doing it in  
software. Great for redundancy, terrible for throughput. That's the  

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