[BlueOnyx:07326] Re: Does BlueOnyx have 'Large File Support'enabled?

[rodrigo at xnet.mx]

Sorry for top posting 

We have mbox files over 5gig on a pae kernel on bo

They are slow on webmail but the files work, they are trouiblesome on outlook and choke server resources, but work

Hth

Rodrigo o

servicio email movil Blackberry
by xnet.mx

-----Original Message-----
From: "Support" <support at etmpacific.com.au>
Sender: blueonyx-bounces at mail.blueonyx.it
Date: Tue, 17 May 2011 11:06:50 
To: 'BlueOnyx General Mailing List'<blueonyx at mail.blueonyx.it>
Reply-To: BlueOnyx General Mailing List <blueonyx at mail.blueonyx.it>
Subject: [BlueOnyx:07318] Re: Does BlueOnyx have 'Large File Support'
	enabled?

Michael,

> That's a kernel option if I recall correctly. If standard CentOS kernels
have 
> that enabled, then we have it as well, as  BlueOnyx uses the standard
CentOS 
> kernel.

So I have figured out....

dumpe2fs -h /dev/cciss/c0d0p1  | grep "Filesystem features"
dumpe2fs 1.39 (29-May-2006)
Filesystem features:      has_journal ext_attr resize_inode dir_index
filetype needs_recovery sparse_super

.... and what I think that I want to see is;

++++++++++++++++++++++++++++++++++++++++
dumpe2fs 1.41.4 (27-Jan-2009)
Filesystem features:      has_journal ext_attr resize_inode dir_index
filetype needs_recovery sparse_super large_file

large_file
 Filesystem can contain files that are greater than
 2GB. (Modern kernels set this feature automatically
 when a file > 2GB is created.)
++++++++++++++++++++++++++++++++++++++++

And then I looked at the 'automatically' bit and thought it worth a try so
then I did the following;

[root at main home]# dd if=/dev/zero of=file.txt count=2048 bs=1048576
2048+0 records in
2048+0 records out
2147483648 bytes (2.1 GB) copied, 43.5845 seconds, 49.3 MB/s

... so I can make a 2.1gb file, and then I tried to make a 10gb file;

[root at main home]# dd if=/dev/zero of=file.txt count=10240 bs=1048576
10240+0 records in
10240+0 records out
10737418240 bytes (11 GB) copied, 574.531 seconds, 18.7 MB/s

... and there is it.

But in reality ( from what I can see ) it's 4gb based on
http://dev.mysql.com/doc/refman/5.0/en/full-table.html but I will make some
tests later today to see what my machine can realistically do.

Tony









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