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Date:      Mon, 08 Dec 2008 01:57:18 +0100
From:      Ivan Voras <ivoras@freebsd.org>
To:        freebsd-questions@freebsd.org
Subject:   Re: Performance benchmarks pitting FreeBSD against Windows
Message-ID:  <ghhrdl$f2a$1@ger.gmane.org>
In-Reply-To: <20081208013850.R1852@wojtek.tensor.gdynia.pl>
References:  <0016e64ca7d690e38f045d45227d@google.com>	<ghb2qd$ij6$1@ger.gmane.org>	<20081205163206.GC25258@kokopelli.hydra> <ghhidb$og3$1@ger.gmane.org> <20081208013850.R1852@wojtek.tensor.gdynia.pl>

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Wojciech Puchar wrote:
>>
>> Win2003 R2        NTFS    RAID10-15    87    25    113    6425    1199=
0
>> Ubuntu Server 7.10    ext3    RAID10-15    129    60    167  =20
>> 36114    72562
>> Ubuntu Server 7.10    JFS    RAID10-15    131    64    167    6638  =20
>> 4855
>> Ubuntu Server 7.10    Reiser3    RAID10-15    130    60    159  =20
>> 30307    35101
>> Ubuntu Server 7.10    XFS    RAID10-15    104    62    164    39    10=

>> FreeBSD 7        UFS+SU    RAID10-15    109    43    111    36551  =20
>> 99999
>> FreeBSD 7        UFS+GJ    RAID10-15    50    28    103    52460    46=
604
>> FreeBSD 7        ZFS    RAID10-15    95    63    180    40522    20260=

>>
>> The first three columns describe the system & RAID (e.g. RAID10-15 mea=
ns
>> RAID10 created from 4 15 kRPM drives), the next three are
>> write/rewrite/read speed in MB/s, the last two are random files
>> created/deleted. I hope the mailer doesn't destroy the formatting too
>=20
> could you compare raw device speed between linux and FreeBSD

No, I don't have the system now.

> it looks like there is driver problem - low linear speed.

I don't think so. It's *very* unlikely a driver can mess up linear speed
- it's far more easier to mess up random IO.

I don't know why it's so (it might be cause by FreeBSD's tiny MAXPHYS),
but it's probably not the driver's fault. I've seen this behaviour with
other controllers (including plain SATA).

>> ZFS was very good, but not so much when compared to Linux file systems=
,
>=20
> ZFS in your benchmart is similar to UFS.

Look at the read speed.


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