Results for 2 Intel 160GB x25-m (G2) Sata SSD in Raid1 (Mirrored)

--------------------------------------------------
CrystalDiskMark 2.2 (C) 2007-2008 hiyohiyo
Crystal Dew World : http://crystalmark.info/
--------------------------------------------------

Sequential Read : 244.366 MB/s
Sequential Write : 86.516 MB/s
Random Read 512KB : 242.880 MB/s
Random Write 512KB : 87.942 MB/s
Random Read 4KB : 20.990 MB/s
Random Write 4KB : 41.334 MB/s

Test Size : 1000 MB
Date : 2010/12/30 22:36:39

----- Original Message -----
From: "Leyne, Sean" <Sean@...>
To: <firebird-support@yahoogroups.com>
Sent: Thursday, December 30, 2010 5:04 PM
Subject: RE: [firebird-support] SSD and "hotspots"?


> Kjell,
>
>> > Finally, a RAID 5 array made up of 4 x 2TB 7200rpm 6gbps SAS drives
>> > **smokes** a single SSD (280MB/s reads and 320MB/s writes @ 8KB and
>> Q=4).
>>
>> Yes, but what about seeks? if you have a lot of forced write transactions
>> the
>> disk will do an awful lot of seeking... An SSD will not. There won't be a
>> lot of
>> sequential I/O for a DB, will there?
>
> The test numbers were from the ATTO Disk Benchmark tool, which does random
> IO tests. So, the numbers I provided included/considered seek times.
>
> The numbers for Crystal Disk Mark v2.2 (5 passes, 1000MB run length) are:
>
> Local RAID0 2 x 7200 SATA HDD - Reads (MB/s)
> - Sequential = 146.2
> - 512K Random = 28.76
> - 4K Random = .0317
>
> Local RAID0 2 x 7200 SATA HDD - Writes (MB/s)
> - Sequential = 167.6
> - 512K Random = 43.66
> - 4K Random = 1.283
>
> Local SSD - Reads (MB/s)
> - Sequential = 269.6
> - 512K Random = 258.3
> - 4K Random = 28.69
>
> Local SSD - Writes (MB/s)
> - Sequential = 215.5
> - 512K Random = 211.9
> - 4K Random = 49.37
>
>
> Sean
>
>
>
> ------------------------------------
>
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>
> Visit http://www.firebirdsql.org and click the Resources item
> on the main (top) menu. Try Knowledgebase and FAQ links !
>
> Also search the knowledgebases at http://www.ibphoenix.com
>
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> Yahoo! Groups Links
>
>
>