[linux-lvm] Problems with LVM
Heinz J . Mauelshagen
mauelshagen at sistina.com
Sun Jul 13 05:14:04 UTC 2003
Petro,
what's the lvcreate command line ?
(highmem may cause problems if you use the snapsho9t, creation should
work fine)
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 ***
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Heinz Mauelshagen Sistina Software Inc.
Senior Consultant/Developer Am Sonnenhang 11
56242 Marienrachdorf
Germany
Mauelshagen at Sistina.com +49 2626 141200
FAX 924446
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