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into the kernel, you only need the userspace tools from the lxc package to take the software for a trial run. The following line in /etc/fstab
none /cgroup cgroup defaults 0 0
mounts the cgroup filesystem, which
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machine, and the database can easily be installed on a separate host.
Setting up a Test Environment
The installation requirements of 128MB of free RAM and 256MB of free disk space, as cited
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were run on a virtual system (using ESX as the hypervisor) with fixed reservations for CPU and memory. To be more precise, I used a virtual CPU running at 1.5GHz and with 512MB of RAM in the virtual
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node1
192.168.56.101 (eth1)
10.0.2.1 (eth0)
node2
192.168.56.102 (eth1)
10.0.2.2 (eth0)
node3
192.168.56.103 (eth1)
10.0.2.3 (eth0
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/loadavg/ [3]:
1.00 0.97 0.94 1/1279 7743
The three additional numbers provided by Linux are the number of running processes (one in this case), the total number of processes, and the last process ID (PID
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.
Listing 3
Loop with OpenMP Directives
!$OMP PARALLEL DO SHARED(m,unew,u) REDUCTION(max:diff)
137 DO j=2,m-1
138 DO i=2,m-1
139 unew(i,j) = (u(i+1,j) + u(i-1,j) + u(i,j+1) + u(i,j-1))/4.0
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#! /usr/bin/perl
02 # groxq.pl
03 use pdq;
04 #--------------- INPUTS ---------------
05 $ArrivalRate = 3/4; # customers per second
06 $ServiceRate = 1.0; # customers per second
07 $SeviceTime = 1/$Service
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: 1487680 0 IO-APIC-fasteoi uhci_hcd:usb3
14 22: 22998855 0 IO-APIC-fasteoi psb@pci:0000:00:02.0
15 23: 3084145 0 IO-APIC-fasteoi hda_intel
16 24: 1 0 ... 0
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(Figure 3). In subsequent test runs, you can compare the results with a previously saved map; devices added or removed are listed in each category.
Figure 3
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).
Listing 1
Crush Map for Six Servers in Two Racks
001 # begin crush map
002
003 # devices
004 device 0 device0
005 device 1 device1
006 device 2 device2
007 device 3 device3
008 device 4 device4
