Suggested Kernel and LVM version for production storage
Hello,
I'm using LVM2 on a FC2 based linux w/ the following versions:
Kernel (patched to LVM2 w/ snapshots) : 2.4.23
LVM version: 2.00.15 (2004-04-19) Library version: 1.00.14-ioctl (2004-04-06) Driver version: 4.0.5
Sometimes I'm getting the following errors, and get all my LVM FileSystem Blocked .. (mean I can't access the files on these partitions and have to reboot for getting access again)
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Aug 26 01:00:02 nazir kernel: device-mapper:
Unable to allocate hash table space
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Aug 26 01:00:02 nazir kernel: device-mapper:
error adding target to table
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Aug 26 10:50:47 nazir kernel: device-mapper:
4.0.5-ioctl (2003-11-18) initialised:
[email protected]
-----------------------------------------------------Any suggestion for a kernel/LVM version ?
Is anyone running a production system w/ LVM2 and snapshot ? if yes which versions ?
thanks,
--Yedidia
Quoted 6 lines · Yedidia Klein
Sometimes I'm getting the following errors, and get all my LVM FileSystem Blocked .. (mean I can't access the files on these partitions and have to reboot for getting access again)
Aug 26 01:00:02 nazir kernel: device-mapper: Unable to allocate hash table space
i.e. There wasn't enough memory available to set up the snapshot. What sizes: How big is the LV & snapshot?
What chunk size? [Try changing.]
Is there just one snapshot?
Check your memory usage.
Alasdair
Signature · 1 line
[email protected]
Quoted 9 lines · Alasdair G Kergon
Quoted 3 lines · Yedidia Klein
Sometimes I'm getting the following errors, and get all my LVM FileSystem Blocked .. (mean I can't access the files on these partitions and have to reboot for getting access again)
Quoted 8 lines
Quoted 4 lines
Aug 26 01:00:02 nazir kernel: device-mapper: Unable to allocate hash table spacei.e. There wasn't enough memory available to set up the snapshot. What sizes: How big is the LV & snapshot?
main partition is 500GB and I've two snapshots, weekly that is 100G and daily that is 60G
Quoted 4 lines
What chunk size? [Try changing.]
chunk is 8.00 KB (what is the suggested value ??)
Quoted 3 lines
Is there just one snapshot?
as I wrote there are two..
Quoted 3 lines
Check your memory usage.
my hardware memory is almost full 860/1000, but the swap isn't that used (it's now 3.3/2000) do the device mapper need more real mem ?? does it worth to increase the swap ?
tnx,
--Yedidia
Quoted 3 lines
Alasdair