[Qemu-devel] big hidden file

[Qemu-devel] big hidden file

[Marc Collin]

hi 
 
 i use suse 9.2, qemu 0.62 and kqemu. 
 
 in the documentation of kqemu we can read 
 
 "When using KQEMU, QEMU will create a big hidden file containing the RAM of 
the virtual machine. For best performance, it is important that this file is 
kept in RAM and not on the hard disk. QEMU uses the `/dev/shm' directory to 
create this file because tmpfs is usually mounted on it (check with the shell 
command df). Otherwise `/tmp' is used as fallback. You can use the 
QEMU_TMPDIR shell variable to set a new directory for the QEMU RAM file." 
 
 linux:/home/collinm/Documents/qemu/qemu # df 
 Sys. de fich.        1K-blocs       Occupé Disponible Capacité Monté sur 
 /dev/sda5             12586488    141504  12444984   2% / 
 tmpfs                   253944      6484    247460   3% /dev/shm 
 /dev/sda1                31077      5854     23619  20% /boot 
 /dev/sdc5             35542652   4087660  31454992  12% /home 
 /dev/sdb6              8393656    452956   7940700   6% /opt 
 /dev/sda7              2007996     33468   1974528   2% /tmp 
 /dev/sdb5             26217176   1985736  24231440   8% /usr 
 /dev/sda6              3148568    472076   2676492  15% /var 
 
 how to keep this file in ram?

Re: [Qemu-devel] big hidden file

[André Braga]

export QEMU_TMPDIR=/dev/shm

qemu [any useful custom flags here] -m 192 
[or something closer to the 256MB you have available on /dev/shm; I
just like standard RAM sizes better...]

-- 
"I invented the term Object-Oriented, and I can tell you I did not
have C++ in mind"-Alan Kay


On Thu, 24 Feb 2005 22:16:48 -0500, Marc Collin <os2@videotron.ca> wrote:
> hi
> 
>  i use suse 9.2, qemu 0.62 and kqemu.
> 
>  in the documentation of kqemu we can read
> 
>  "When using KQEMU, QEMU will create a big hidden file containing the RAM of
> the virtual machine. For best performance, it is important that this file is
> kept in RAM and not on the hard disk. QEMU uses the `/dev/shm' directory to
> create this file because tmpfs is usually mounted on it (check with the shell
> command df). Otherwise `/tmp' is used as fallback. You can use the
> QEMU_TMPDIR shell variable to set a new directory for the QEMU RAM file."
> 
>  linux:/home/collinm/Documents/qemu/qemu # df
>  Sys. de fich.        1K-blocs       Occupé Disponible Capacité Monté sur
>  /dev/sda5             12586488    141504  12444984   2% /
>  tmpfs                   253944      6484    247460   3% /dev/shm
>  /dev/sda1                31077      5854     23619  20% /boot
>  /dev/sdc5             35542652   4087660  31454992  12% /home
>  /dev/sdb6              8393656    452956   7940700   6% /opt
>  /dev/sda7              2007996     33468   1974528   2% /tmp
>  /dev/sdb5             26217176   1985736  24231440   8% /usr
>  /dev/sda6              3148568    472076   2676492  15% /var
> 
>  how to keep this file in ram?
> 
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