Waclaw Chrabaszcz
... there is no spoon ...

March 2013 Entries

SCOM 2012 SP1 – XenApp monitoring

If you have to manage many XenApp farm, or just one but really big - it will be worth to have good robust tool for it. As a Citrix guy I should prefer EdgeSight, hopefully I am Microsoft victim and I am going choose SCOM. Why, because SCOM offers active monitoring, it is not only checking the health of my servers it can recover them in many situations. To start monitoring we have to: Deploy SCOM agents on Citrix boxes Mark them as a proxy to forward XenApp events (in my opinion SCOM run as account ......

Shared resources and stopped services

A hypervisor is like a bank. It is offering inexistent CPU cycles and HDD I/Os up to 150% of real capacity. In normal situation VMs consumes about 20% of declared (maximum) RAM, CPU and disk IO, and business is running perfectly … until … Until everyone will come to bank and ask "I want my money back". Good example, short power outage or unexpected hypervisor reboot. Once the hypervisor will start it will try to power on all VM guests, and every of them will want "his money back". As a result we ......

A Windows Client and Site Link Costs

I was thinking that Windows client systems (XP, Vista, 7, 8) respects link costs. Let's use standard Microsoft diagram. If PC within Site B with default settings lose connection to every site B Domain Controller, it will not contact DC within Site A, it will try to use as a logon server random DC from the domain. And it could be Site D for example. In the real world scenario PC from New York will use DC from Sydney instead of WashingtonJ. To enable expected behavior we have to set followed policy: ......