Jumbo Frames Due to the additional network configuration required, Nutanix does not recommend configuring jumbo frames on AHV for most deployments. However, some scenarios such as database workloads using Nutanix Acropolis Block Services (ABS) with iSCSI network connections can benefit from the larger frame sizes and reduced number of frames. To enable jumbo frames, refer…
What is X-FIT? X-FIT is a distributed time series analysis and forecasting system that uses an ensemble of models. The models compete in a distributed tournament, where the system performs cross-validation and selects the top models based on the mean absolute scaled error (MASE) on the out-of-sample forecasts during the cross validation. Then the final…
Capacity Runway Capacity Runway focuses on consumption from three resource buckets, which include Storage capacity CPU Memory The capacity runway shows the number of days remaining before a resource is consumed. The multi-cluster view is shown as a table and individual cluster is shown as a graph. It uses machine learning algorithms to forecast capacity….
After completing the NCP, the NCAP was the next goal on my list. I began to prepare for this in a similar fashion to how I did with the NCP. The first step was of course, to download the Exam Blueprint. As with the NCP guide, a big credit again goes to Steven Poitras, and…
Compression Select the check box to enable compression. A Delay (In Minutes) field appears after checking the box. Enter a zero to enable inline compression or a value (number of minutes) to enable post-write compression, which can begin (up to) that number of minutes after the initial write. All data in the storage container is…
Snapshots + Clones DSF provides native support (VAAI, ODX, etc) Leverage redirect-on-write algorithm VM data consists of files (vmdk/vhdx) which are vDisks Snapshot taken = vDisk marked immutable New vDisk created as read/write Both vDisks have same block map Metadata mapping to corresponding extents Since each vDisk is its own block map, it eliminates need…
Erasure Coding Similar to RAID where parity is calculated, EC encodes a strip of data blocks on different nodes to calculate parity In event of failure, parity used to calculate missing data blocks (decoding) Data block is an extent group, and each block is on a different node belonging to a different vDisk Configurable based…
I have always been a fan of leveraging community resources when studying for certification exams. The VCAP study guides here, and here were invaluable when I was studying for those exams. When I began preparing for the Nutanix NCP, I was a little bummed out when I couldn’t find any community resources like these. I…