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SubjectRe: (reiserfs) Re: LVM / Filesystems / High availability
Stephen C. Tweedie wrote:
>
> Hi again,
>
> On Thu, 18 Jun 1998 18:57:12 -0500 (CDT), Shawn Leas <sleas@ixion.honeywell.com> said:
>
> > I think Linux kernel ver 2.3 is going to do just we hope it is going to
> > do. On the list of things that I've seen realistically discussed are:
>
> > 1) Vast improvement in the MM, such as zone alocation, etc.
> > 2) The support for LVM. (I can't tell you how long I've been searching)
> > 3) Super high throughput FS's that are journaled for
> > stability and speed of recovery.
>
> I would be surprised if we did not see _all_ of these in 2.3.
>
> > I think/hope that the kernel group sees these issues as important to the
> > furthering of Linux in general. LVM is a pretty standard and easy
> > interface for doing lots of things, like mirroring, striping, etc.
>
> Actually, we already have mirroring and striping. The current 2.1
> supports raid0, raid1 and raid5 natively, and the network block device
> code even lets you run mirroring over the network to a remote block
> device.
I see some problems in current setup. The problem is that raid0/1/5
provide protection from disk failures, not from crash or unclean
shutdown. With Journaling FS, that knows how to use multiple devices,
it's possible to archieve all 3 - speed, protection from disk failures
and protection from crash/unclead shutdown. As you understand, all 3 are
important.

>
> > I vote for a new age in scalability! Let us not look upon this as
> > kernel bloat. I know personally that the lack of such things in Linux
> > has kept many people from using it.
>
> Absolutely. In fact, I'm beginning to think that linux-2.4 should
> actually be numbered 3.0, with "Enterprise Scalability" being the big
> thing for the new version number. The main thing needed for that over
> and above what's already been described is more scalable SMP.
Linux will have to include many more functions before it'll be usefull
for "Enterprise" level. Some of these functions are already developed
and live separately, some are being developed now and aren't in usable
stage yet, some are not even started.

In about 6 months we'll see what 2.3 will look like. Then it might be
good to think carefully and look @ what is missing.
>
> --Stephen
>
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Vadim

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