Re: [linux-lvm] Suggested Kernel and LVM version for production storage

[Yedidia Klein <yedidia jct ac il>]

Alasdair G Kergon wrote:

> On Sun, Aug 29, 2004 at 11:37:06AM +0300, Yedidia Klein wrote:
>  
>
> > 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?
main partition is 500GB and I've two snapshots, weekly that is 100G and 
daily that is 60G

> What chunk size?  [Try changing.]
>  
chunk is 8.00 KB (what is the suggested value ??)

> Is there just one snapshot?
>  
as I wrote there are two..

> 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

> Alasdair
>