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2018-02-20xci: Switch VM disk cache to 'unsafe' and use 'iothreads' for I/OMarkos Chandras1-1/+0
According to the docs[1] "writeback: This mode causes the hypervisor to interact with the disk image file or block device with neither O_DSYNC nor O_DIRECT semantics. The host page cache is used and writes are reported to the guest as completed when they are placed in the host page cache. The normal page cache management will handle commitment to the storage device. Additionally, the guest's virtual storage adapter is informed of the writeback cache, so the guest would be expected to send down flush commands as needed to manage data integrity. Analogous to a raid controller with RAM cache." and "writeback: This mode informs the guest of the presence of a write cache, and relies on the guest to send flush commands as needed to maintain data integrity within its disk image. This is a common storage design which is completely accounted for within modern file systems. This mode exposes the guest to data loss in the unlikely case of a host failure, because there is a window of time between the time a write is reported as completed, and that write being committed to the storage device." "unsafe: This mode is similar to writeback caching except for the following: the guest flush commands are ignored, nullifying the data integrity control of these flush commands, and resulting in a higher risk of data loss because of host failure. The name “unsafe” should serve as a warning that there is a much higher potential for data loss because of a host failure than with the other modes. As the guest terminates, the cached data is flushed at that time." It's beneficial to use the host page cache to cache I/O from the guest instead of waiting for data to reach the actual disk device. We do not normally care about data integrity so data loss is not a problem. Moreover, we drop the cache configuration from the flavor files since it's independent of the flavor that's being deployed. [1] https://www.suse.com/documentation/sles-12/singlehtml/book_virt/book_virt.html#cha.cachemodes Change-Id: I118ffdf84b1be672185b3eff60fe5d0b5f1a590d Signed-off-by: Markos Chandras <mchandras@suse.de>
2017-12-18Increase ram of XCI VM and change disk cache type for all VMsFatih Degirmenci1-1/+1
These options seem to help with the functest execution within XCI VM. Change-Id: I3b9b6b02fc571feb42543025f8ab179c6db18e0a Signed-off-by: Fatih Degirmenci <fdegir@gmail.com>
2017-08-17prototypes: xci: config: Allow users to set VM specsMarkos Chandras1-4/+4
The default VM spec may not be good enough for every host so allow users to override the default VM_* variables. Change-Id: Ie846620ab81b7fedcbe4b23da735379ab75d3cc2 Signed-off-by: Markos Chandras <mchandras@suse.de>
2017-08-11xci: Rename the deployment host to opnfvFatih Degirmenci1-1/+1
Reflect the changes to other impacted files as well. Change-Id: I106f4e47fe5c75d288f4878fe6ec9f8ff39c652e Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>
2017-08-11xci: Yet another try to find how best to structure stuffFatih Degirmenci1-0/+18
Summary of changes are - flavors directory has been removed and the flavor config files are moved into config and renamed to <flavor>-vars - common files are put under file - files specific to flavors are put under file/<flavor> directories - templates and var files are stored in template and var directories respectively - 3 playbooks are created Change-Id: I8a93e0947ccb02f93a6c8f00da27e0cc6b4dc21e Signed-off-by: Fatih Degirmenci <fatih.degirmenci@ericsson.com>