Archive for the tag 'redhat'

 

 

Aug 27 2014

LVS: a Free Load-Balancer for Microsoft Exchange

Published by under Linux

Microsoft Exchange traffic can be load-balanced with Microsoft NLB but it requires to set up 4 Exchange servers for the sake that NLB isn’t compatible with Exchange cluster. Most Microsoft guys do not recommend it.Among NLB downsides, Exchange services are monitored with a basic ping, meaning the service is considered to be active even if […]

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Feb 23 2011

MSA 2012i SAN Performance Windows vs Linux

Published by under Storage

I’ve noticed backups are getting slower and slower over time going from 500 to 2500MB/min throughput. I run backups on 2 dedicated RAID0 disks hosted on a iSCSI MSA array first, and duplicate them on tapes. Since I want to use the same array for a new database project, I want to measure and tune […]

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Jan 14 2011

Multipath on iSCSI Disks and LVM Partitions on Linux

Published by under Linux,Storage

Here are a few steps to configure iSCSI disks on Linux. Although I set this up on a Redhat Enterprise connected to an HP MSA 2012i, the whole configuration remains generic and can be applied to any SAN.I will add another post to check how both Linux and Windows perform on the same iSCSI device, […]

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Dec 19 2009

Redhat/Ubuntu/Debian Bridge Interface Startup Scripts

Published by under Linux

All systems need bridge-utils package installed either with yum or apt-get.  Redhat / Fedora Edit each network interface startup file that is going to be added to the bridge  And create the bridge configuration file Ubuntu Debian

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Dec 14 2009

A Virtual Cisco Router on your Network

Published by under Cisco,Linux

Dynamips and dynagen let you create a virtual Cisco router on a Linux box. It would be even better if that router was reachable from the LAN, wouldn’t it? Going further, that same router could lead us to another couple of virtual routers running in a lab.   Download and Installation Download dynamips and dynagen […]

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