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Operating Systems Linux Red Hat KVM/Qemu allocated memory not showing in guest Post 303027055 by joeg1484 on Friday 7th of December 2018 03:21:20 PM
Old 12-07-2018
KVM/Qemu allocated memory not showing in guest

So we have a RHEL 7.6 workstation with 128 gigs of ram. The OS sees all the ram and 80 cors (40 HT)


We have 1 guest with 8 CPUs and 32gigs of ram running RHEL 7.6 workstation as well. We are trying to create another guest with 64 CPUs and 80 gigs of ram. We setup the system using virt-manager and PXE boot the system to install the OS.


All this goes without a hitch, but when we log in after the system is build with PXE and do a free -g it only shows 2 gigs instead of 80 gigs.


I have tried many variation of memory including 64gigs, but each time we try something above 32gigs, its only shows 2gigs.


Any ideas?
Thanks!

Joe
 

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BHOST(5)							 LAM FILE FORMATS							  BHOST(5)

NAME
bhost - LAM boot schema (host file) format SYNTAX
# # comments # <machine> [cpu=<cpucount>] [user=<userid>] <machine> [cpu=<cpucount>] [user=<userid>] ... DESCRIPTION
A boot schema describes the machines that will combine to form a multicomputer running LAM. It is used by recon(1) to verify initial con- ditions for running LAM, by lamboot(1) to start LAM, and by lamhalt(1) to terminate LAM (note that wipe(1) has been deprecated by the lamhalt(1) command). The particular syntax of a LAM boot schema is sometimes called the "host file" syntax. It is line oriented. One line indicates the name of a machine, typically the full Internet domain name, an optional number of CPUs available on that machine, and optionally the userid with which to access it. Common boot schema for a particular site may be created by the system administrator and placed in the installation directory under etc/. They typically start with the prefix bhost. Individual users usually create their own boot schema, especially if the configurations are simple. EXAMPLE
Here is an example three node boot schema: # # example LAM host file # beowulf1.nd.edu cpu=2 beowulf2.nd.edu beowulf2.nd.edu somewhere.else.college.edu user=guest Note that the "guest" ID is significant, since the user has an alternate login ID on somewhere.else.college.edu. Additionally note that beowulf1 has a CPU count of 2 listed (a CPU count of 1 is assumed if it is not given). This value is used by mpirun(1), MPI_Comm_spawn(2), and MPI_Comm_spawn_multiple(2) for the "C" (or CPU) notation that specifies how many ranks to start. This is particularly useful for run- ning on SMP machines. beowulf2 is listed twice, but has no specific CPU count listed. In this case, LAM will keep a running tally of the total number of CPUs for that host. Hence, LAM will calculate that beowulf2 has two CPUs available for use. Calculating the number of CPUs by counting occu- rances of a hostname is useful in a batch environment where a hostfile may list the same hostname multiple times, indicating that the batch scheduler has allocated multiple CPUs for a single job (e.g., PBS operates this way). For the above-mentioned schema, the command "mpirun C foo" would start five instances of the foo program; two on beowulf1, two on beowulf2, and one on somewhere.else. FILES
$LAMHOME/etc/bhost.def default boot schema file SEE ALSO
lamboot(1), lamhalt(1), mpirun(1), MPI_Comm_spawn(1), MPI_Comm_spawn_multiple(1), recon(1), wipe(1) LAM 6.5.8 November, 2002 BHOST(5)
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