Re: [PLUG] PLUG West - Monday June 17, 2013 - Linux Filesystems and Benchmarking, presented by K.S. Bhaskar (7pm at FIS in Malvern)

["K.S. Bhaskar" <bhaskar@bhaskars.com>]

It's possible to convert ext2 --> ext3 --> ext4 in place: seeÂhttp://www.ghacks.net/2010/08/11/convert-ext23-to-ext4/

Running without barriers, especially on SATA drives with large amounts of memory in the drive electronics is for don't care data: seeÂhttp://www.linux-mag.com/id/7773/

Regards

-- Bhaskar

On Tue, Jun 18, 2013 at 6:32 AM, Rich Freeman <r-plug@thefreemanclan.net> wrote:

On Tue, Jun 18, 2013 at 12:51 AM, JP Vossen <jp@jpsdomain.org> wrote:
>
> Work stuff aside, 11 out of 13 machines I just checked are running ext3, the
> other 2 are ext4. ÂGuess I'll need to look into that.
>

One little tip though - put /var/lib/mysql on ext3 and not ext4.
Ext4, mysql, and barrier support combine to give very poor
performance. ÂMySQL recommends just disabling barriers, which IMHO is
right up there with how their motto used to be "who needs ACID?"
Moving just mysql to ext3 results in a fairly dramatic performance
increase (in fact, I should probably stop allocating so much RAM for
it now).

Otherwise, yes, ext4 is probably your best all-around option until
btrfs is production-ready. ÂI don't like xfs since it can't be shrunk
- I like my filesystems to be flexible (preferably with online
resizing).

Rich

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