[Cialug] Xfs for centos

[Paul Gray]

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Nathan C. Smith wrote:
>> CentOS 5.1 should have everything you need to create ext3 filesystems
>> in excess of 8TB (The Fedora Project has a 10TB filesystem for it's
>> build farm, except they are on RHEL). AFAIK Centos5.2 doesn't exist
>> yet. CentOS 4 is limited to 8TB ext3 filesystem IIRC.  I'd stick with
>> ext3.
>>
>> If you do go with XFS be sure to install "xfsprogs" which contains the
>> utilities for creating/repairing XFS filesystems.
>>
>> Jeff
> 
> Thanks Jeff.  With ext3 do I have to worry about allocating extra inodes for a really big fs or is the amount allocated by mkfs going to be enough?  I only ask because somebody mentioned indodes to me.

The main gist of large disk support lies with fdisk.  fdisk is still a
bit dumb (or 32 bits dumb) about filesystems larger than 4TB.  Stick
with parted.

I'm using xfs on my 15TB array presently...but I'm using Debian of
course.  On my smaller 3TB array I'm still using ext3.

If you're using ext3 on anything "large", you'll need to format it with

  mkfs.ext3 -F -m0 (device)

- -F is needed if you're above 8TB.  -m0 is just because it's stupid to
reserve 5% of a 15TB array for root by default.

Make sure that you're also specifying gpt as your partition type as well
(in parted).


- --
Paul Gray
314 East Gym, Dept. of Computer Science        -o)
University of Northern Iowa                    /\\
Supercomputing 2008 Education Program Chair   _\_V
Message void if penguin violated ...  Don't mess with the penguin
No one says, "Hey, I can't read that ASCII attachment ya sent me."
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