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61%
High availability clustering on a budget with KVM
30.11.2025
Home »  Archive  »  2010  »  Issue 0: Active...  » 
Yulia Saponova, 123RF.com
"> 08 09 10 11 12 13 14 15
60%
Managing virtual machines
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© Igor Klimov, 123RF.com
"creating" $vmname 09 10 virsh suspend rhstorage 11 virt-clone -o rhstorage -n $vmname -f /var/lib/libvirt/images/$vmname.qcow 12 virsh resume rhstorage 13 14 oldmac="52:54:00:B4:DF:EB" 15 newmac
60%
An IT nomad's daily diary
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Kateryna Pruchkovska, 123RF.com
print 13 else: 14 print "The system configuration file %s does not exist, aborting." % cblr_systems 15 print 16 sys.exit(1) 17 18 column_header = [ "name","os","eth0-mac
60%
I/O benchmarks with Fio
30.11.2025
Home »  Archive  »  2011  »  Issue 5: Pen Te...  » 
© Kheng Ho Toh, 123RF.com
the Buffer 01 [global] 02 ioengine=libaio 03 direct=1 04 filename=testfile 05 size=2g 06 bs=4m 07 08 refill_buffers=1 09 10 [write] 11 rw=write 12 write_bw_log 13 14 [read] 15 stonewall 16 rw=read 17 write
60%
Beyond monitoring: Mathematical load simulation in Perl
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© kudryashka, 123RF.com
Model"; 11 $work = "ebiz-tx"; 12 $node1 = "WebServer"; 13 $node2 = "AppServer"; 14 $node3 = "DBMServer"; 15 $think = 0.0 * 1e-3; # as per test system 16 $dtime = 2.2 * 1e-3; # dummy service time 17 18
60%
Exploring Nmap's scripting engine
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
.mcwrite.net Starting Nmap 5.00 ( http://nmap.org ) at 2011-03-06 19:35 CST Interesting ports on blogs.typepad.com (204.9.177.195): Not shown: 998 filtered ports PORT STATE SERVICE 80/tcp open http | robots
59%
High-availability workshop: GFS with DRBD and Pacemaker
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Maxim Borovkov, 123RF.com
resource: sudo mkfs.gfs2 -p lock_dlm -j2 -t pcmk:pcmk resource resource is the DRBD resource device node – for example, /dev/drbd/by-res/disk0/0 . What's missing now is the filesystem resource
59%
A Btrfs field test and workshop
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Adrian Hillman, 123RF.com
System, DUP: total=8.00MB, used=4.00KB Metadata, DUP: total=1.00GB, used=79.20MB If Btrfs only has one device available when the filesystem is created, it automatically generates a duplicate
59%
Moving HPC to the cloud
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Zarko Cvijovic, 123RF.com
, basic storage of 500GB) that would cost US$ 14.40/hour [(AWS @ US$ 0.16/hour + Univa @ US$ 0.02/hour)x80]. The larger usage case (256 cores, 4GB of RAM per core, 1TB of fast storage) would cost US$ 58
58%
Optimizing Hyper-V network settings
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
© Stefan Hermans, Fotolia.com
or logically isolate Hyper-V hosts, even if they are configured on the same network. Infos Hyper-V and Dynamic MAC Address Regeneration: http://blogs.msdn.com/b/virtual_pc_guy/archive/2010/05/14

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