[SGVLUG] FW: Video server

[Chris Louden]

On Wed, Apr 15, 2009 at 4:59 PM, Matt Campbell <dvdmatt at gmail.com> wrote:
> Thanks Chris,
>
> I talked to a number of people and the recommendation had been to avoid ext3
> with large static files as the journaling would slow down performance.  It
> sounds like you disagree.  Where do you go to find a good performance

The reference for dealing with large files I should have clarified
more. I was only refering to EXT4 and XFS. EXT3 is awful at large
files.


> comparison of the various FSs?
>

I did my own recently XFS came out as the winner until I broke 50GB in
fiie size. At which point EXT4 took the lead. The difference was only
a minute as i recall. 6min to write a 52GB file with EXT4, took 7 with
XFS. At 25GB XFS was about 30 seconds faster.

I ended up picking XFS, which i had never worked with till now.

> Matt
>
>> -----Original Message-----
>> From: sgvlug-bounces at sgvlug.net [mailto:sgvlug-bounces at sgvlug.net] On
>> Behalf Of Chris Louden
>> Sent: Wednesday, April 15, 2009 3:11 PM
>> To: SGVLUG Discussion List.
>> Subject: Re: [SGVLUG] Video server
>>
>> On Wed, Apr 15, 2009 at 3:07 PM, Chris Louden <chris at chrislouden.com>
>> wrote:
>> > Ext2?
>> >
>> > ...3 would be faster....EXT4 or XFS would be even faster.
>>
>> Especially if you are dealing with large files.
>>
>> -Chris
>>
>>
>> >
>> > -Chris
>> >
>> >
>> >
>> > On Wed, Apr 15, 2009 at 2:38 PM, Matt Campbell <dvdmatt at gmail.com>
>> wrote:
>> >> Hi Matti, thanks for answering.
>> >>
>> >> The details are on the site;).  There are 12 WD RE3 1TB drives
>> hooked up to
>> >> an Adaptec 31205 SAS/SATA RAID controller.  This appears as /dev/sdb
>> and has
>> >> a single Ext2 partition on it.
>> >>
>> >> The 31205 is a PCIe8 card supported on RedHat and SUSE directly and
>> reported
>> >> working on Fedora, Ubuntu and others.  It looks like they released
>> the
>> >> driver source code for a number of distros.
>> >>
>> >> What other details are useful?
>> >>
>> >> Matt
>> >>
>> >>> -----Original Message-----
>> >>> From: sgvlug-bounces at sgvlug.net [mailto:sgvlug-bounces at sgvlug.net]
>> On
>> >>> Behalf Of matti
>> >>> Sent: Wednesday, April 15, 2009 1:50 PM
>> >>> To: SGVLUG Discussion List.
>> >>> Subject: Re: [SGVLUG] Video server
>> >>>
>> >>>
>> >>> Hi,
>> >>>
>> >>> What's the details on the RAID config?
>> >>> ( sw/hw? )
>> >>>
>> >>> Drives?
>> >>>
>> >>> thanks
>> >>> matti
>> >>>
>> >>> > The RAID is giving less than 20MB/sec
>> >>> > write speeds
>> >>> > (>300MB/sec read though!)  Does anyone know what I
>> >>> > can look at to help
>> >>> > diagnose this?
>> >>>
>> >>>
>> >>>
>> >>>
>> >>
>> >>
>> >
>
>