[Workaround.org] lenny alpha basic installation
martinsimovic at gmail.com
Tue Jun 16 15:59:55 CEST 2009
2009/6/16 Christoph Haas <email at christoph-haas.de>
> MALTE SIMON schrieb:
> > Now use this volume group to "Create a logical volume" and select your
> > volume group
> > (vgmailserver) to contain it. Give the new logical volume an explanatory
> > name like "lvboot"
> > (the "lv" makes it clear that it's a logical volume). Make it 2 GB large.
> > you mean name like lvroot or not?
> > You should write VG LV in big lettern so its is better to understand.
> Are volume names case-sensitive? Just in case. :)
> > Wye the swap not double or 1,5 of the RAM?
> Because that rule is rather outdated. Imagine you have a server with 32
> GB RAM and a 130 GB hard disk. Half of your disk would be used as swap.
> I rather think the opposite is true. The more RAM you have the less swap
> you need. The only reasons for swap are to help the kernel sort virtual
> memory pages, to swap out parts that are really only needed upon the
> boot phase or if you want your computer to hibernate to store the RAM's
> contents there.
> > You should talk about the nachteil "Single-Point-of-Failure" will grow
> > like on raid0
> Right, I'll add that. After all the MTBF shrinks if more disks are used
> like in a JBOD.
> > To rescue your server you should be shoure that your Rescue CD support
> True. The Knoppix CD I had at hand failed at this. However the "grml" CD
> seemed to work well. Although I wonder whether a warning about SPOFs
> should suffice. After all I'm not trying to help with every situation
> like failure of a single PV in an LVM setup. I'd assume that most people
> even just use one PV. And in 1U servers those are usually already backed
> by a RAID-1.
> > when you use XFS then the danger of data loose by a power loose grow a
> How come? Does the journal work any different from the one used in ext3?
> (Hmm, perhaps I should mention battery-backed write caches.)
> > Please offer the /boot Partiton 200mb if more kernels are used.
> > I forget why but sommeone told me that for a small boot partition ext2
> > is the best
> > filesystem. Maybe somme one cann prof that.
> On /boot a journal is pretty useless because it hardly ever changes.
> Especially not after the system is up and running. ext2 had the
> advantage that every rescue disk can work with it and even old versions
> of Grub could handle that. I'd assume that this isn't necessary any
> more. (Still I wonder why Grub wasn't used when I played with LVM here.)
this is not true. /boot is read-only during the boot stage (this is why
journal is useless) however after the system is up and running there IS data
written to it every time you install a new kernel.
> Thanks for the input.
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