Linux Performance analysis tools
cloudibee Understand how various Linux performance monitoring tools behave when the system is heavily loaded in terms of cpu, memory and swapping to disk (IO).
Linux
Linux performance tuning – vm.swappiness
vm.swappiness takes a value between 0 and 100 to change the balance between swapping applications and freeing cache. At 100, the kernel will always prefer to find inactive pages and…
Corrupt RPMDB and recovery
rpm command not working and rpmdb is corrupted ? Here are the steps how to recover it and make rpm commands working again.
Disabling TLS 1.0 on nginx web servers
Disable TLS 1.0 and enable higher versions of TLS in nginx. To disable TLS 1.0 on nginx webserver installations, edit the "ssl_protocols" directive in your nginx.conf, where the TLS server…
GeoIP Based Country Blocking for Apache
The Chinese won’t leave me alone and it’s cluttering Fail2Ban, so I’m resorting to just embargo blocking China. This isn’t likely to work in the long run, so I’ll have…
Change default boot kernel in Linux Grub2
Grub2 : change Linux default boot kernel
Netapp Storage Administration articles
Here are some of the very useful NetApp management articles from Cloudibee. Netapp Storage Administration Commands – Pocket Guide Netapp Deduplication guide Tuning Snapmirror & Snapvault speed Netapp Performance monitoring…
Netapp Deduplication – quick setup guide
Deduplication refers to the elimination of redundant data in the storage. In the deduplication process, duplicate data is deleted, leaving only one copy of the data to be stored. However,…
Pocket guide for netapp commands
This post contains the list of commands that will be most used and will come handy when managing or monitoring or troubleshooting a Netapp filer. sysconfig -a : shows hardware…
Perl script for listing VMware Tools status
In your day to day operations as part of managing a virtual VMware datacenter, you may need to gather or perform a particular operation on a cluster alone or a…
OCFS2 cluster – quick setup guide
OCFS2 is a POSIX-compliant shared-disk cluster file system for Linux capable of providing both high performance and high availability. Cluster-aware applications can make use of parallel I/O for higher performance.…
Squid Cache proxy – a quick setup guide
This post gives the steps to quickly setup Squid proxy and make it up and caching in minutes. There are also some tips & tricks on squid. My squid proxy…
vSphere Management App for iPAD
An interesting application to manage your vmware vsphere datacenter … through an Applie iPAD. Pretty interesting .. The app is still in its early stages, but the demo shows great…
Vsphere Tutorial & demo videos
Mike Laverick has done a great job in sharing out the Vmware Vsphere video tutorials, that clearly explains number of vsphere concepts, howto and technologies in details. Worth watching! Watch…
Tuning Netapp snapmirror/snapvault speed
In Netapp, there is a option to set/limit bandwidth of all snapmirror and snapvault transfers. The option can be either system-wide or for a particular transfer. We can tune either…