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19%
Linux filesystem performance tested
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© nyul, 123rf.com
.3.6 (5-12-2012) Filesystems and versions: ext2, ext3, ext4 (each with e2fsprogs 1.41.14), Btrfs (btrfsprogs 0.19), XFS (xfsprogs 3.1.6), ReiserFS (3.6.21), ZFS (0.6.0-rc8). Operating and Filesystems
19%
Galera Cluster for MySQL
30.11.2025
Home »  Archive  »  2012  »  Issue 10: Traff...  » 
© Noel Powell, fotolia.com
to install the Pen load balancer, and Listing 12 shows a query to Pen. Listing 11 Installing and Starting Pen wget http://siag.nu/pub/pen/pen-0.18.0.tar.gz tar xf /download/pen-0.18.0.tar
19%
Give your servers the once over with Nmap
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© ragsac, 123RF.com
.nmap.org (64.13.134.52): Not shown: 994 filtered ports PORT STATE SERVICE VERSION 22/tcp open ssh OpenSSH 4.3 (protocol 2.0) 25/tcp closed smtp
19%
Tracing applications with OProfile and SystemTap
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© boing, Photocase.com
686 oprofile-0.9.5-4.fc12.i686 To profile the kernel, you need to tell OProfile where the kernel image is located with the --vmlinux option: opcontrol --setup --vmlinux=/usr/lib/debug/lib/ modules
19%
Virtualization with KVM
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
developers pulled the plug, first placing kqemu under the GPL and finally dropping it entirely in favor of KVM. As of version 0.10.0, Qemu officially supports KVM, and as of version 0.12.0, kqemu is history
19%
Monitoring your cluster with a home-grown OCF agent
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Aleksey Mnogosmyslov, 123RF.com
="binary" unique="0" required="0"> 18 19 Location of the Asterisk PBX server binary 20 21 Asterisk PBX server binary 22
19%
A simple approach to the OCFS2 cluster filesystem
30.11.2025
Home »  Archive  »  2010  »  Issue 1: System...  » 
© Kheng Ho Toh, 123RF.com
_dlm] root 3467 7 0 20:07 ? 00:00:00 [o2net] root 3965 7 0 20:24 ? 00:00:00 [ocfs2_wq] root 7921 7 0 22:40 ? 00:00:00 [o2hb-BD5A574EC8] root 7935 7
19%
A standard cloud computing API
30.11.2025
Home »  Archive  »  2011  »  Issue 6: Perfor...  » 
total = summary.values.inject(0) { |sum, i| sum += i } 12 puts "Found #{total} instances in the following states:" 13 summary.keys.sort.each do |s| 14 printf "%20s %d\n", s, summary[s] 15 end 16 puts
19%
Managing virtual machines
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© Igor Klimov, 123RF.com
VALUES ('$hostname', '$ip', 'A', 86400, $time, 1, 0)/; 21 } else { 22 $sql = qq/UPDATE records SET content = '$ip' WHERE name = '$hostname'/; 23 } 24 $sth->finish(); 25 $dbh->do($sql) or warn $dbh
19%
A Btrfs field test and workshop
31.10.2025
Home »  Archive  »  2012  »  Issue 11: Cloud...  » 
© Adrian Hillman, 123RF.com
, you can use the current package from Debian Sid [4], which is available there as version 0.19+20120328. After meeting these preconditions, you can start with a fresh Ubuntu 12.04 LTS server default

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