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Subject: Re: FS of choice for max random iops ( Maildir )
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On 16/09/2011 12:31, freebsd@top-consulting.net wrote:

> A. TEST1: dd bs=1024 if=/dev/zero of=/data/t1 count=1M
> 
> 1. ZFS performed the worst, averaging 67MB/sec
> 2. UFS + gjournal did around 130MB/sec
> 3. UFS did around 190MB/sec
> 
> B. TEST2 ( random file creation ): bonnie++ -d /data -c 10 -s 0 -n 50 -u 0
> 
> 1. UFS + gjournal performed the worst
> 2. ZFS performed somewhat better
> 3. UFS performed the best again ( about 50% better )
> 
> C. TEST3 ( sequential writing ): bonnie++ -d /data -c 10 -s 8088 -n 0 -u 0
> 
> 1. UFS + gjournal crashed the box
> 2. ZFS performed average
> 3. UFS performed better than ZFS ( about 50% better )
> 
> 
> I really like the concepts behind ZFS and UFS + Journaling but the
> performance hit is quite drastic when compared to UFS.
> 
> What I'm looking for here is max IOPS when doing random read/writes. Is
> UFS the best choice for this ? Do my results make sense ?

Your tests do look a bit odd - ZFS usually does better on sequential and
UFS on random IO (rw mix). For random IO I'd go with UFS.

Try comparing with blogbench.