FreBSD 9.1 and ZFS v28 performances

[Steven Hartland]

----- Original Message ----- 
From: "Davide D'Amico" <davide.damico at contactlab.com>
>>> And the result from sysbench:
>>> General statistics:
>>>     total time:                          82.9567s
>>>     total number of events:              1
>>>     total time taken by event execution: 82.9545s
>> 
>> Thats hardly doing any disk access at all, so odd it would be doubling
>> your benchmark time.
>> 
>>> Using a SSD:
>>> # iostat mfid2 -x 2
>>>        tty           mfid2             cpu
>>>  tin  tout  KB/t tps  MB/s  us ni sy in id
>>>    0    32 125.21  31  3.84   0  0  0  0 99
> [...]
>>>    0   585  0.00   0  0.00   3  0  1  0 96
>>>    0    22  4.00   0  0.00   0  0  0  0 100
>>> And the result from sysbench:
>>> General statistics:
>>>     total time:                          36.1146s
>>>     total number of events:              1
>>>     total time taken by event execution: 36.1123s
>>> That are the same results using SAS disks.
>> 
>> So this is ZFS on the SSD, resulting the same benchmark results as 
>> UFS?
> This is UFS on SSD, that has the same behaviour than UFS on RAID10 HW 
> on SAS drives.

I'd recommend doing the same test on the SSD with ZFS as well as that would
give you a simple like for like comparison.

    Regards
    Steve

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