ESCALATOR-31 Adjusting documentation

[escalator.git] / docs / A1-Appendix.rst

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-Appendix
---------
-
-A.1 Impact Analysis
-~~~~~~~~~~~~~~~~~~~
-
-Upgrading the different software modules may cause different impact on
-the availability of the infrastructure resources and even on the service
-continuity of the vNFs.
-
-**Software modules in the computing nodes**
-
-#. Host OS patch
-
-#. Hypervisor, such as KVM, QEMU, XEN, libvirt
-#. Openstack agent in computing nodes (like Nova agent, Ceilometer
-   agent...)
-   
-.. <MT> As SW module, we should list the host OS and maybe its
-   drivers as well. From upgrade perspective do we limit host OS
-   upgrades to patches only?
-
-**Software modules in network nodes**
-
-#. Neutron L2/L3 agent
-#. OVS, SR-IOV Driver
-
-**Software modules storage nodes**
-
-#. Ceph
-
-The table below analyses such an impact - considering a single instance
-of each software module - from the following aspects:
-
--  the function which will be lost during upgrade,
--  the duration of the loss of this specific function,
--  if this causes the loss of the vNF function,
--  if it causes incompatibility in the different parts of the software,
--  what should be backed up before the upgrade,
--  the duration of restoration time if the upgrade fails
-
-These values provided come from internal testing and based on some
-assumptions, they may vary depending on the deployment techniques.
-Please feel free to add if you find more efficient values during your
-testing.
-
-https://wiki.opnfv.org/_media/upgrade_analysis_v0.5.xlsx
-
-Note that no redundancy of the software modules is considered in the table.