There is information for how the mounts are currently configured (for
instance if you used defaults in /etc/fstab) located in: /proc/mounts on
most Linux hosts.
The options should likely be referred to from either /proc/mounts, or
/etc/mtab - and of course in the man pages mkfs.{your_filesystem_choice).
On Tue, Jun 7, 2016 at 9:26 AM, Edward Ned Harvey (lopser) <
lop...@nedharvey.com> wrote:
> I seem to recall seeing, somewhere in the linux kernel, or somewhere, a
> way that you could list filesystem feature flags. For example, you could
> see that ext3 and ext4 support journaling, and btrfs does something like
> journaling and intent logging, but you could see that btrfs lacked some
> other features that are present in extfs, and you could further see that
> nfs and gluster/ceph had yet again, a different set of feature flags.
>
>
>
> Can anyone think of where that set of feature flags exists?
>
>
>
> By comparison, I know you can cat /proc/cpuinfo, and get a list of feature
> flags of your CPU. I **swear** I saw something similar, somewhere, for
> filesystems, but I'm not seeing it under /proc, and I don't recall where
> else I might have seen such a thing.
>
>
>
> The specific issue I'm trying to address is: If you have a bunch of
> services on a bunch of servers, that are all using a NFS server, and you
> want to improve performance by migrating that storage to a distributed
> filesystem (specifically gpfs) how do you get a handle on whether and which
> applications might be affected by the filesystem change? I'm pretty sure
> some sort of file locking feature would be one of the flags to pay
> attention to. I'm also pretty sure filesystem notifications (inotify, etc)
> would be another - I'm pretty sure there aren't any distributed filesystems
> that support distributed change notification. All of these are kernel-level
> features, and I'd like to precisely identify the differences, in order to
> assess which applications might rely on those features.
>
> _______________________________________________
> Tech mailing list
> Tech@lists.lopsa.org
> https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech
> This list provided by the League of Professional System Administrators
> http://lopsa.org/
>
>
--
Miano, Steven M.
http://stevenmiano.com
_______________________________________________
Tech mailing list
Tech@lists.lopsa.org
https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech
This list provided by the League of Professional System Administrators
http://lopsa.org/
