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Nutanix_Bible非常全面的一份介绍Nutanix虚拟化技术的文档
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The Nutanix Bible
1. Intro
2. Book of Nutanix
Architecture
Converged Platform
Cluster Components
Data Structure
I/O Path Overview
How It Works
Data Protection
Data Locality
Scalable Metadata
Shadow Clones
Elastic Dedupe Engine
Networking and I/O
CVM Autopathing
Disk Balancing
Software-Defined Controller Architecture
Storage Tiering and Prioritization
Storage Layers and Monitoring
APIs & Interfaces - new!
Administration
Important Pages
Cluster Commands
NCLI
Metrics & Thresholds
Gflags
Troubleshooting
3. Book of vSphere
Architecture
How It Works
Array Offloads – VAAI
Administration
Important Pages
Command Reference
Metrics & Thresholds
Troubleshooting
4. Book of Hyper-V
Architecture
How It Works
Array Offloads – ODX
Administration
Important Pages
Command Reference
Metrics & Thresholds
Troubleshooting
5. Revisions
Intro
Welcome to The Nutanix Bible! I work the with Nutanix platform on a daily basis –
trying to find issues, push its limits as well as administer it for my production
benchmarking lab. This page is being produced to serve as an living document outlining
tips and tricks used every day by myself and a variety of engineers at Nutanix. This will
also include summary items discussed as part of the Advanced Nutanix series. NOTE:
This is not an official reference so tread at your own risk!
Book of Nutanix
Architecture
Converged Platform
The Nutanix solution is a converged storage + compute solution which leverages local
components and creates a distributed platform for virtualization aka virtual computing
platform. The solution is a bundled hardware + software appliance which houses 2
(6000/7000 series) or 4 nodes (1000/2000/3000/3050 series) in a 2U footprint. Each
node runs an industry standard hypervisor (ESXi, KVM, Hyper-V currently) and the
Nutanix Controller VM (CVM). The Nutanix CVM is what runs the Nutanix software and
serves all of the I/O operations for the hypervisor and all VMs running on that host. For
the Nutanix units running VMware vSphere, the SCSI controller, which manages the
SSD and HDD devices, is directly passed to the CVM leveraging VM-Direct Path (Intel
VT-d). In the case of Hyper-V the storage devices are passed through to the CVM. Below
is an example of what a typical node logically looks like:
Together, a group of Nutanix
Nodes forms a distributed platform called the Nutanix Distributed Filesystem
(NDFS). NDFS appears to the hypervisor like any centralized storage array, however all
of the I/Os are handled locally to provide the highest performance. More detail on how
these nodes form a distributed system can be found below. Below is an example of how
these Nutanix nodes form NDFS:
top
Cluster Components
The Nutanix platform is composed of the following high-level components:
Medusa
Key Role: Distributed metadata store
Description: Medusa stores and manages all of the cluster metadata in a
distributed ring like manner based upon a heavily modified Apache Cassandra. The
Paxos algorithm is utilized to enforce strict consistency. This service runs on every
node in the cluster.
Zeus
Key Role: Cluster configuration manager
Description: Zeus stores all of the cluster configuration including hosts, IPs, state,
etc. and is based upon Apache Zookeeper. This service runs on three nodes in the
cluster, one of which is elected as a leader. The leader receives all requests and
forwards them to the peers. If the leader fails to respond a new leader is
automatically elected.
Stargate
Key Role: Data I/O manager
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