[linux-lvm] Problems with LVM
Petro
petro at corp.vendio.com
Fri Jul 11 19:02:01 UTC 2003
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
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