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Re: [linux-lvm] Problems with LVM



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 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 Sistina com                           +49 2626 141200
                                                       FAX 924446
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