[linux-lvm] Problems with LVM
Petro
petro at corp.vendio.com
Sun Jul 13 13:29:01 UTC 2003
On Sun, Jul 13, 2003 at 12:11:51PM +0200, Heinz J . Mauelshagen wrote:
> Petro,
> what's the lvcreate command line ?
lvcreate -L10G -n snap000 -s /dev/vg0
> (highmem may cause problems if you use the snapsho9t, creation should
> work fine)
Is this highmem problem across all 2.4 kernels, or just 2.4.19+? The
first report I've seen of it is with a 2.4.19 kernel.
>
> Regards,
> Heinz -- The LVM Guy --
>
> On Fri, Jul 11, 2003 at 05:01:27PM -0700, Petro wrote:
> > Hello again.
> >
> > I'm having a problem with LVM, and I'm really, really hoping you won't
> > tell me it's because of:
> >
> > # CONFIG_NOHIGHMEM is not set
> > CONFIG_HIGHMEM4G=y
> > # CONFIG_HIGHMEM64G is not set
> > CONFIG_HIGHMEM=y
> > CONFIG_HIGHIO=y
> >
> > (linux kernel 2.4.21, lvm 1.0.7 stuff installed)
> >
> > I've got 8 boxes with 4 gig of memory, and 6 200 gig drives in a raid 0
> > setup, and I need to use LVM+Snapshots.
> >
> > I can setup and create a 1.09T logical volume, but when I go to create a
> > snaphot, I get:
> >
> > lvcreate -- INFO: using default snapshot chunk size of 64 KB for "/dev/vg0/test"
> > lvcreate -- ERROR "Cannot allocate memory" creating VGDA for "/dev/vg0/test" in kernel
> >
> > Now, in reading past posts there is some talk of how having "high
> > memory" turned on will cause problems with snapshots.
> >
> > The problem is that on these machines I *need* 4 gig of memory, and I
> > *need* snapshots.
> >
> > Help?
> >
> >
> > --- Physical volume ---
> > PV Name /dev/sda
> > VG Name vg0
> > PV Size 1.09 TB [2344319232 secs] / NOT usable 32.31 MB [LVM: 267 KB]
> > PV# 1
> > PV Status available
> > Allocatable yes
> > Cur LV 1
> > PE Size (KByte) 32768
> > Total PE 35770
> > Free PE 570
> > Allocated PE 35200
> > PV UUID LyEPH1-pq2I-D022-v5c9-98rp-n7Ff-4LnNKL
> >
> > --- Volume group ---
> > VG Name vg0
> > VG Access read/write
> > VG Status available/resizable
> > VG # 0
> > MAX LV 256
> > Cur LV 1
> > Open LV 1
> > MAX LV Size 2 TB
> > Max PV 256
> > Cur PV 1
> > Act PV 1
> > VG Size 1.09 TB
> > PE Size 32 MB
> > Total PE 35770
> > Alloc PE / Size 36032 / 1.10 TB
> > Free PE / Size 4294967034 / 131071.99 TB
> > VG UUID KciSkB-xbr8-22RM-zmke-6A69-6BEM-xLWMzv
> >
> > --- Logical volume ---
> > LV Name /dev/vg0/lv0
> > VG Name vg0
> > LV Write Access read/write
> > LV Status available
> > LV # 1
> > # open 1
> > LV Size 1.07 TB
> > Current LE 35200
> > Allocated LE 35200
> > Allocation next free
> > Read ahead sectors 1024
> > Block device 58:0
> >
> >
> > procs memory swap io system cpu
> > r b w swpd free buff cache si so bi bo in cs us sy id
> > 0 0 0 0 3949704 1648 26104 0 0 3 2 27 5 0 0 100
> >
> >
> > --
> > "On two occasions, I have been asked [by members of Parliament], 'Pray,
> > Mr. Babbage, if you put into the machine wrong figures, will the right
> > answers come out?' I am not able to rightly apprehend the kind of confusion
> > of ideas that could provoke such a question." -- Charles Babbage
> >
> > _______________________________________________
> > linux-lvm mailing list
> > linux-lvm at sistina.com
> > http://lists.sistina.com/mailman/listinfo/linux-lvm
> > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
>
> *** Software bugs are stupid.
> Nevertheless it needs not so stupid people to solve them ***
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
> Heinz Mauelshagen Sistina Software Inc.
> Senior Consultant/Developer Am Sonnenhang 11
> 56242 Marienrachdorf
> Germany
> Mauelshagen at Sistina.com +49 2626 141200
> FAX 924446
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
>
> _______________________________________________
> linux-lvm mailing list
> linux-lvm at sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
--
"On two occasions, I have been asked [by members of Parliament], 'Pray,
Mr. Babbage, if you put into the machine wrong figures, will the right
answers come out?' I am not able to rightly apprehend the kind of confusion
of ideas that could provoke such a question." -- Charles Babbage
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