Re: LVM2
From: Jeffrey E. Hundstad
Date: Thu Jan 20 2005 - 17:28:26 EST
XFS is an SGI project.
http://oss.sgi.com/
I've been using it for quite a while and am quite happy with it; it is
very fast and very fault tolerant. The only warning I'd like to give
about it is it seems that some Linux developers seem to have a bad taste
in their mouth when it comes to XFS; go figure.
--
jeffrey hundstad
Trever L. Adams wrote:
It is for a group. For the most part it is data access/retention. Writes
and such would be more similar to a desktop. I would use SATA if they
were (nearly) equally priced and there were awesome 1394 to SATA bridge
chips that worked well with Linux. So, right now, I am looking at ATA to
1394.
So, to get 2TB of RAID5 you have 6 500 GB disks right? So, will this
work within on LV? Or is it 2TB of diskspace total? So, are volume
groups pretty fault tolerant if you have a bunch of RAID5 LVs below
them? This is my one worry about this.
Second, you mentioned file systems. We were talking about ext3. I have
never used any others in Linux (barring ext2, minixfs, and fat). I had
heard XFS from IBM was pretty good. I would rather not use reiserfs.
Any recommendations.
Trever
P.S. Why won't an LV support over 2TB?
S.P.S. I am not really worried about the boot and programs drive. They
will be spun down most of the time I am sure.
On Thu, 2005-01-20 at 22:40 +0100, Norbert van Nobelen wrote:
A logical volume in LVM will not handle more than 2TB. You can tie together
the LVs in a volume group, thus going over the 2TB limit. Choose your
filesystem well though, some have a 2TB limit too.
Disk size: What are you doing with it. 500GB disks are ATA (maybe SATA). ATA
is good for low end servers or near line storage, SATA can be used equally to
SCSI (I am going to suffer for this remark).
RAID5 in software works pretty good (survived a failed disk, and recovered
another failing raid in 1 month). Hardware is better since you don't have a
boot partition left which is usually just present on one disk (you can mirror
that yourself ofcourse).
Regards,
Norbert van Nobelen
On Thursday 20 January 2005 20:51, you wrote:
I recently saw Alan Cox say on this list that LVM won't handle more than
2 terabytes. Is this LVM2 or LVM? What is the maximum amount of disk
space LVM2 (or any other RAID/MIRROR capable technology that is in
Linus's kernel) handle? I am talking with various people and we are
looking at Samba on Linux to do several different namespaces (obviously
one tree), most averaging about 3 terabytes, but one would have in
excess of 20 terabytes. We are looking at using 320 to 500 gigabyte
drives in these arrays. (How? IEEE-1394. Which brings a question I will
ask in a second email.)
Is RAID 5 all that bad using this software method? Is RAID 5 available?
Trever Adams
--
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." -- Benjamin Franklin, 1759
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