What Happen If My XenApp Farm Cant Connect to the Data Store?

This is one of my favorite interview question, I just don't know why. it seems simple, but some candidates failed to give a proper answer (poor them). I wish all of them better luck next time.

Okay, now back to the real business. From Citrix Administrators Point-of-View, losing a DB may cost chaos, depending on how severe the issue is. However, from user perspective, nothing is different. Users wont really impacted of this. They still be able to launch Citrix published applications and works as normal. Thanks to Local Host Cache (LHC), it eases the burden of Citrix Admins (oh really?)

However, although all Citrix XenApp servers have LHC, there are some conditions that Citrix Admins need to remember :

There is no grace period for this (MPS 3.0 and above). Users still be able to connect to the Citrix farm (lucky!)
Only static information available to users. No new info can be added and current info cannot be changed (not really...)

In any circumstances, DO NOT :

Restart / reboot the Citrix XenApp servers. it will cause the server to contact DB server. This will result IMA service won't started.
Restart IMA service (same reason as above).
Re-create LHC (in order to re-create LHC, we need to stop IMA service).

Reference :

Comments

Microsoft Assessment and Planning (MAP) Toolkit - Extract Report (3/4)

As mentioned in the first post , this KB series is about Microsoft Assessment and Planning (MAP) Toolkit. There are 4 main steps : Install MAP Toolkit and its basic configuration Collect inventory Data Extract Report Extract Advanced Report Once inventory data collected, we can generate reports. From the inventory data collected earlier, we can use options in the toolkit to generate the report. For this example, we re going to discover Windows 10 Readiness This KB is about how to generate report from collected inventory data. At Overview page, select the targeted scenario category. In this example, it is Desktop . At this page, select specific scenario that we after. In this example, it is Windows 10 Readiness. It is possible to customize assessment properties. The properties will set the threshold of the assessment, such as, threshold for minimum CPU speed, acceptable free disk, as well as minimum assigned RAM. To do so, s...

Microsoft Assessment and Planning (MAP) Toolkit - Collect Inventory Data (2/4)

As mentioned in previous post , this KB series is about Microsoft Assessment and Planning (MAP) Toolkit. There are 4 main steps : Install MAP Toolkit and its basic configuration Collect inventory Data Extract Report Extract Advanced Report Before we could generate a report, we need to collect inventory data. There are a few options, such as Windows computers, Linux computers, computers on VMware, Active Devices and users, etc. For this example, we re going to discover Windows Computers within a specific IP ranges. This KB is about how to collect inventory data. At Overviews section, select Perform an inventory For this testing, let’s select Microsoft computers, and select Next For this testing, we will discover devices via IP range. Select scan an IP address range, and select Next Specify range if IPs, and select Next To discover and connect to the machines, we need to provide user account(s) that have permission to do so. Select ...

Microsoft Assessment and Planning (MAP) Toolkit - Overview

Microsoft created a toolkit called Microsoft Assessment and Planning Toolkit that helps IT to discover current infrastructure for variety of migration projects. This tool kit covers below scenarios : Windows computers Linux/UNIX computers VMware computers Active Directory and Users Exchange Servers Endpoint Protection Server Lync Server Softwre ID (SWID) tags SQL Server SQL Server with Database Details Microsoft Azure Platform Migration Oracle Windows Volume Licensing Client Access Tracking for Windows Server 2012 or Later Client Access Tracking for SQL Server 2012 or later Client Access Tracking for Configuration Manager Client Access Tracking for SharePoint Server 2016 Client Access Tracking for Remote Desktop Services … and IT Admins can use below methods to discover the machines. Use Active Directory Domain Service (AD DS) Use Windows networking protocols Use System Center Configuration Manager (SCCM) Scan an IP Address range Manually enter...

Search This Blog