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17%
Monitoring KVM instances with Opsview
30.11.2025
Home »  Archive  »  2012  »  Issue 07: Xen v...  » 
© Gina Sanders, Fotolia
Since the Linux kernel 2.6.20 release in February 2007, the Kernel-Based Virtual Machine, KVM [1], has made much progress in its mission to oust other virtualization solutions from the market. KVM
17%
The RADOS object store and Ceph filesystem
30.11.2025
Home »  Archive  »  2012  »  Issue 09: Windo...  » 
© Brigida Soriano, Fotolia.com
to install RADOS and Ceph. Ceph, which is a plain vanilla filesystem driver on Linux systems (e.g., ext3 or ext4), made its way into the Linux kernel in Linux 2.6.34 and is thus available for any distribution
17%
A script for strict packet filter updates
05.12.2016
Home »  Archive  »  2016  »  Issue 36: Autom...  » 
Lead Image © french 03, photocase.com
of the required results. You can thus automatically receive the required information via simple interfaces, such as the IP-to-ASN mapping service by Team Cymru [6], by regularly querying the assignment of an IP
17%
Microsoft Exchange replacement
20.06.2022
Home »  Archive  »  2022  »  Issue 69: Terra...  » 
Photo by Gabriel Crismariu on Unsplash
is available on GitHub [6] or as a packaged distribution from grommunio's customer repository service [7] or a community repository service [8]. Internally, grommunio uses the Open Build Service [9]. Initially
17%
Single sign-on with SSSD, LDAP, and Kerberos
30.11.2025
Home »  Archive  »  2010  »  Issue 2: Backup...  » 
Anja Kaiser; Fotolia
posixaccount /etc/dirsrv/schema/10rfc2307.ldif objectClasses: ( 1.3.6.1.1.1.2.0 NAME 'posixAccount' DESC 'Standard LDAP objectclass' SUP top AUXILIARY MUST ( cn $ uid $ uidNumber $ gidNumber $ home
17%
Cross-Vendor IPsec
25.10.2011
Home »  Articles  » 
 
connections to join remote LANs through a private tunnel over the Internet. The first RFCs on IPsec were drafted during the development of IPv6 and date back to 1995. The current version is described by RFC
17%
Linux device mapper writecache
30.01.2020
Home »  Archive  »  2020  »  Issue 55: AWS L...  » 
Lead Image © lightwise, 123R.com
lvm2 --- <232.89g <232.89g /dev/sdb lvm2 --- <6.37t <6.37t Next, I add both volumes into a new volume group labeled vg-cache, $ sudo vgcreate vg-cache /dev/nvme0n1 /dev
17%
Clustering with OpenAIS and Corosync
30.11.2025
Home »  Archive  »  2011  »  Issue 3: Are yo...  » 
brunoilfo, 123RF.com
and maintained only by Red Hat. In more recent versions (e.g., 2.0 in RHEL 5 and Fedora Core 6 or later), the legacy CMAN implementation was replaced by an open implementation based on the Application Interface
17%
Fixing Ceph performance problems
29.09.2020
Home »  Archive  »  2020  »  Issue 59: Custo...  » 
Lead Image © Kritiya Sumpun, 123RF.com
and implemented in line with all of the current best practices with a 25Gbps fast network over redundant Link Aggregation Control Protocol (LACP) links. A dedicated network with its own Ethernet hardware
17%
Scalable network infrastructure in Layer 3 with BGP
14.08.2017
Home »  Archive  »  2017  »  Issue 40: Lean...  » 
Lead Image © artqu, 123RF.com
at the top of the rack (hence the name "top of rack"). Cross-cabling of multiple racks can make sense. For example, if you have two racks side by side, each with a Mellanox SN2410 switch (48x25Gbps Ethernet

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