FreBSD 9.1 and ZFS v28 performances

[Steven Hartland]

----- Original Message ----- 
From: "Davide D'Amico" <davide.damico at contactlab.com>
To: "Steven Hartland" <killing at multiplay.co.uk>
Cc: <freebsd-fs at freebsd.org>
Sent: Monday, March 18, 2013 4:13 PM
Subject: Re: FreBSD 9.1 and ZFS v28 performances


> Il 18/03/13 16:31, Steven Hartland ha scritto:
>>
>> ----- Original Message ----- From: "Davide D'Amico"
>> <davide.damico at contactlab.com>
>> To: <freebsd-fs at freebsd.org>
>> Sent: Monday, March 18, 2013 2:50 PM
>> Subject: FreBSD 9.1 and ZFS v28 performances
>>
>>
>>> Hi all,
>>> I'm trying to use ZFS on a DELL R720 with 2x6-core, 32GB ram, H710
>>> controller (no JBOD) and 15K rpm SAS HD: I will use it for a mysql 5.6
>>> server, so I am trying to use ZFS to get L2ARC and ZIL benefits.
>>>
>>> I created a RAID10 and used zpool to create a pool on top:
>>
>> While having a separate ZIL disk is good, your benefits may well be
>> limited if said disk is a traditional HD, better to look at enterprise
>> SSD's for this. The same and them some applies to your L2ARC disks.
> 
> I'm using SSD disks for zfs cache and zfs log:
> 
> mfi0 Physical Drives:
>  0 (  279G) ONLINE <SEAGATE ST3300657SS ES65 serial=6SJ5JWFD> SAS E1:S0
>  1 (  279G) ONLINE <SEAGATE ST3300657SS ES65 serial=6SJ5JW8S> SAS E1:S1
>  2 (  558G) ONLINE <SEAGATE ST3600057SS ES65 serial=6SL45EB8> SAS E1:S2
>  3 (  558G) ONLINE <SEAGATE ST3600057SS ES65 serial=6SL44ZV5> SAS E1:S3
>  4 (  558G) ONLINE <SEAGATE ST3600057SS ES65 serial=6SL462QV> SAS E1:S4
>  5 (  558G) ONLINE <SEAGATE ST3600057SS ES65 serial=6SL42YQY> SAS E1:S5
>  6 (  119G) ONLINE <OCZ-VERTEX4 1.4 serial=OCZ-17D56E1KT4PW8MX> SATA E1:S6
>  7 (  119G) ONLINE <OCZ-VERTEX4 1.4 serial=OCZ-605IWNB3XLKQ6CP> SATA E1:S7

So RAID10 on just 6 disks in effect just 3 active spindles? If so then your
throughput of 400MB/s is about right.

    Regards
    Steve

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