hammer-inodes: malloc limit exceeded

[Francois Tigeot]

On Sun, Aug 31, 2008 at 03:12:52PM -0700, Matthew Dillon wrote:
> 
> :This is 2.0 + patches (current DragonFly_RELEASE_2_0_Slip)
> :
> :...
> :>     And tell me what it says.  If the value is greater then 70000, set it
> :>     to 70000.
> :
> :There is no such sysctl. I used kern.maxvnodes instead; the original value
> :was 129055.
> 
>     Yah, I mistyped that.  its kern.maxvnodes.  The fix I had made was
>     MFC'd to 2.0_Slip so the calculation must still be off.  Reducing
>     maxvnodes should solve the panic.  The basic problem is that HAMMER's
>     struct hammer_inode is larger then struct vnode so the vnode limit
>     calculations wind up being off.

The panic occurred again with kern.maxvnodes set to 70000.
I have reduced it to 35000; we will see if the system is still stable in a
few days...
> 
>     You don't need to use the hardlink trick if backing up to a HAMMER
>     filesystem.  I still need to write utility support to streamline
>     the user interface but basically all you have to do is use rdist, rsync,
>     or cpdup (without the hardlink trick) to overwrite the same destination
>     directory on the HAMMER backup system, then generate a snapshot
>     softlink.  Repeat each day.

I agree this is a better way with Hammer. I just don't want to use something
too different from my other backup servers for the time being...

-- 
Francois Tigeot