Troubleshooting vSphere Storage

All vSphere administrators will benefit big-time from this book because it gives you clear, practical instructions on troubleshooting a whole host of storage problems. From fundamental to advanced techniques, it’s all here.

Overview

• Identify key issues that affect vSphere storage visibility, performance, and capacity
• Comprehend the storage metrics and statistics that are collected in vSphere
• Get acquainted with the many vSphere features that can proactively protect your environment

In Detail

Virtualization has created a new role within IT departments everywhere; the vSphere administrator. vSphere administrators have long been managing more than just the hypervisor, they have quickly had to adapt to become a ‘jack of all trades’ in organizations. More and more tier 1 workloads are being virtualized, making the infrastructure underneath them all that more important. Due to this, along with the holistic nature of vSphere, administrators are forced to have the know-how on what to do when problems occur.

This practical, easy-to-understand guide will give the vSphere administrator the knowledge and skill set they need in order to identify, troubleshoot, and solve issues that relate to storage visibility, storage performance, and storage capacity in a vSphere environment.

This book will first give you the fundamental background knowledge of storage and virtualization. From there, you will explore the tools and techniques that you can use to troubleshoot common storage issues in today’s data centers.

You will learn the steps to take when storage seems slow, or there is limited availability of storage. The book will go over the most common storage transport such as Fibre Channel, iSCSI, and NFS, and explain what to do when you can’t see your storage, where to look when your storage is experiencing performance issues, and how to react when you reach capacity. You will also learn about the tools that ESXi contains to help you with this, and how to identify key issues within the many vSphere logfiles.

What you will learn from this book

• Identify the root cause of storage issues within vSphere
• Understand where to look when storage is suddenly not available
• Use esxtop to monitor and discover pain points in your infrastructure
• Diagnose and resolve SCSI reservations and queuing issues
• Design storage properly based on workloads
• Monitor and alert on your thinly provisioned disks and data store capacity
• Utilize Storage DRS to proactively balance your capacity and workload on your data stores
• Maintain compliance in terms of placement with Profile Driven Storage
• Grant VMs the performance they need with Storage I/O Control
• Decipher storage-related error entries in the vSphere logfiles

Approach

This is a step-by-step example-oriented tutorial aimed at showing the reader how to troubleshoot a variety of vSphere storage problems, and providing the reader with solutions that can be completed with minimal effort and time in order to limit damage to work.

Who this book is written for

If you are a vSphere administrator, this is the book for you. This book will provide you with 'need to know' information about the various storage transports that ESXi utilizes, the tools and techniques we can use to identify problems, and the fundamental knowledge and steps to take to troubleshoot storage-related issues. Prior knowledge of the VMWare environment is assumed.

所有vSphere管理員都將從這本書中受益匪淺，因為它提供了清晰、實用的指導，幫助您解決各種存儲問題。從基礎到高級技術，這裡都有。

概述：
- 確定影響vSphere存儲可見性、性能和容量的關鍵問題
- 理解在vSphere中收集的存儲指標和統計數據
- 熟悉可以主動保護您環境的許多vSphere功能

詳細內容：
虛擬化在各個IT部門中創造了一個新的角色，即vSphere管理員。vSphere管理員長期以來一直在管理不僅僅是虛擬機監控器，他們迅速適應成為組織中的“萬事通”。越來越多的一級工作負載正在虛擬化，這使得基礎架構變得更加重要。由於vSphere的整體性質，管理員被迫了解問題發生時應該怎麼做。

這本實用、易於理解的指南將為vSphere管理員提供所需的知識和技能，以識別、排除故障並解決與vSphere環境中的存儲可見性、性能和容量相關的問題。

本書首先將為您提供存儲和虛擬化的基礎背景知識。然後，您將探索可以用於排除當今數據中心常見存儲問題的工具和技術。

您將學習當存儲速度變慢或存儲可用性有限時應採取的步驟。本書將介紹最常見的存儲傳輸方式，如光纖通道、iSCSI和NFS，並解釋在無法看到存儲時應該怎麼做，當存儲出現性能問題時應該從哪裡查找，以及在容量達到上限時應該如何應對。您還將了解ESXi中的工具以及如何在眾多vSphere日誌文件中識別關鍵問題。

您將從本書中學到：
- 確定vSphere存儲問題的根本原因
- 當存儲突然不可用時應該從哪裡查找
- 使用esxtop監控和發現基礎架構中的痛點
- 診斷和解決SCSI保留和排隊問題
- 根據工作負載適當地設計存儲
- 監控和警報您的薄虛擬磁盤和數據存儲容量
- 利用存儲DRS在數據存儲上主動平衡容量和工作負載
- 通過配置驅動存儲維護放置合規性
- 使用存儲I/O控制為虛擬機提供所需的性能
- 解讀vSphere日誌文件中與存儲相關的錯誤項目

方法：
這是一本以示例為導向的逐步教程，旨在向讀者展示如何解決各種vSphere存儲問題，並提供可以在最短時間內以最小努力完成的解決方案，以限制工作損害。

本書的讀者：
如果您是vSphere管理員，這本書適合您。本書將為您提供有關ESXi使用的各種存儲傳輸方式的“必須知道”信息，以及我們可以用來識別問題的工具和技術，以及排除與存儲相關問題時所需的基礎知識和步驟。假設您已具備VMWare環境的相關知識。