Re: udev VS oracleasm disk aliasing - preferences?
Date: Fri, 6 Jul 2012 11:27:02 -0400
Message-ID: <CAJ7936zPUUvhHPtapdH6fFV1BDN1xOGSwJjR65ru_2PX9BA=Cw_at_mail.gmail.com>
I would say since Oracle is only supporting ASMlib on RHEL6 when you use the OEL6 kernel, that's the first sign that Oracle plans to sunset ASMlib over time. There's still years of support, I'm sure, but you might just go ahead and start planning to use udev, as that's probably the future direction for this aspect of the infrastructure.
Matt
On Fri, Jul 6, 2012 at 11:02 AM, Alex Fatkulin <afatkulin_at_gmail.com> wrote:
> My answer might be a bit strange but I always favored udev because it
> allowed not to use asmlib.
>
> asmlib was developed in the old days mostly to overcome OS
> limitations. OS have improved a great deal since then and amslib lost
> most of its value. There is still stuff being done like minimizing a
> number of open file descriptors and IO coalescing (maybe something
> else but I don't keep a close eye on what's going on with asmlib
> anymore) but its just not big enough for most shops to care. Oracle
> certainly didn't care themselves when they built ODA -- it uses native
> linux multipathing (dm-mapper-multipath) for naming/load
> balancing/failover and no asmlib. Though I won't exclude that some
> exciting value-add features might be coming in the future versions ;-)
>
> In my view udev is a lot more flexible and universal since it comes
> standard with any modern Linux. If I want all my iscsi devices to be
> under /dev/iscsi then I can easily do it with udev.
-- http://www.freelists.org/webpage/oracle-lReceived on Fri Jul 06 2012 - 10:27:02 CDT