[Linux-cluster] which is better gfs2 and ocfs2?
thomas at sjolshagen.net
Sun Mar 13 16:21:40 UTC 2011
I'm using gfs2 to host KVM vm image files for a pair of clustered hosts. Am using iscsi targets for the vm data devices however as they are hosting imap spools. No stability issues or performance problems I can readily or easily attribute to the gfs2 FS in my use case.
On Mar 13, 2011, at 9:37 AM, yue <ooolinux at 163.com> wrote:
> 1.i need gfs2 or ocfs2 to store xen-disk image file(20G--100G),it is big file. the underlying storage is fc-san. both of them have cluster sence.so they fit for me.
> if gfs2 is ready for product? anyone use gfs2 in product? stability is the most important thing.
> 2.i have try gfs2 and ocfs2 , iozone shows , gfs2 has a good throughput when record>=512k and file size > 4G.
> 3.my kernel is 2.6.32 and latest.
> At 2011-03-13 12:48:17，"Alan Brown" <ajb2 at mssl.ucl.ac.uk> wrote:
> >On 12/03/11 23:13, Bob Peterson wrote:
> >> Agreed. We're abundantly aware of the performance problems,
> >> and we're not ignoring them.
> >I know Bob, thanks.
> >> (1) We recently found and fixed a problem that caused the
> >> dlm to pass locking traffic much slower than possible.
> >Is this rolled into 2.6.18-238.5.1.el5 ?
> >> (2) We recently increased the speed and accuracy of fsck.gfs2
> >> quite a bit.
> >Noted and appreciated. I had cause to use them a few days ago.
> >> (3) We also recently developed a patch that improves GFS2's
> >> management of cluster locks by making hold times self-tuning.
> >> This makes gfs2 perform much faster in many situations.
> >> (4) We've recently developed another performance patch that
> >> sped up clustered deletes (unlinks) as much as 25%.
> >Good. This has been a real cow but at least for this kind of thing users
> >simply tend to go for lunch and let it run.
> >> (5) We recently identified and fixed a performance problem
> >> related to writing large files that sped things up considerably.
> > See question 1 :)
> >Can I get hotfixes if possible? (el5.6 x64)
> >Linux-cluster mailing list
> >Linux-cluster at redhat.com
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