Hotfix XS61E003 for XenServer 6.1.0

After Hotfix 1 and Hotfix 2 Citrix has released the third hotfix for XenServer 6.1.0.

This hotfix resolves the following issues:

Note: There is no specific threshold for the performance issues described below. Customers experiencing any of the symptoms should install the hotfix.

  1. Connecting XenCenter to a large pool can increase the load on the pool master, resulting in excessive inter-host communication and cause delays when performing VM lifecycle operations.
  2. Delays can occur when restarting XAPI in a pool consisting of large number of Virtual Disk Images (VDIs), for example more than 1000, as this can cause excessive load on the pool master.
  3. A pool consisting of a large number of Windows VMs with XenServer Tools installed, can cause a high (up to 100%) CPU load on the pool master, resulting in communication overhead. For example, customers may not be able to connect XenCenter to the pool.
  4. When using High Availability (HA) in an environment where the protected Virtual Machines (VMs) use VLANs, HA may be unable to detect that a VM is agile: it cannot therefore plan a suitable recovery procedure. In this case, customers may find that their XenServer pools unexpectedly become “overcommitted”, or that they may be unable to use HA.
  5. QoS settings do not work when set through XenCenter or the xe CLI.
  6. For active-active bonds on the vSwitch network stack, the bond rebalancing interval has changed from 10 seconds to 30 minutes.
  7. Performance data collection from pool members can cause XAPI session leaks, which eventually may exceed the maximum allowed number of open sessions. If this occurs, the pool master’s xensource.log file will display the following message: Number of disposable sessions in database (416/416) exceeds limit (400): will delete the oldest.

You can download the hotfix here.

Hotfix XS61E001 for XenServer 6.1.0

It’s not that long ago that Citrix has released version 6.1.0 for it’s XenServer product. Today they have released the first hotfix for this version.

This hotfix resolves the following issues:

After installing XenServer 6.1.0, multipathing will only use one path for Software iSCSI on arrays which contain the same IQN on multiple target portals. As a result, customers will see only one active path and will not successfully failover in the event of an infrastructure issue. This hotfix resolves this issue.

NOTE: Customers who are currently experiencing this problem should detach and re-attach the Storage Repositories (SRs) after applying the hotfix. However, customers who cannot detach and re-attach the SR, should refer to CTX135277 – Workaround for the Multipathing Behavior Change in XenServer 6.1.0 for a temporary workaround.

You can download the hotfix (and find installation instructions) here at the Citrix Knowledge Base.