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. Identify key issues that affect vSphere storage visibility, performance, and...
| Autor principal: | |
|---|---|
| Formato: | Libro electrónico |
| Idioma: | Inglés |
| Publicado: |
Birmingham :
Packt Publishing
2013.
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| Edición: | 1st edition |
| Colección: | Professional expertise distilled
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| Materias: | |
| Ver en Biblioteca Universitat Ramon Llull: | https://discovery.url.edu/permalink/34CSUC_URL/1im36ta/alma991009627669606719 |
Tabla de Contenidos:
- Intro
- Troubleshooting vSphere Storage
- Table of Contents
- Troubleshooting vSphere Storage
- Credits
- About the Author
- Acknowledgment
- About the Reviewers
- www.PacktPub.com
- Support files, eBooks, discount offers and more
- Why Subscribe?
- Free Access for Packt account holders
- Instant Updates on New Packt Books
- Preface
- What this book covers
- What you need for this book
- Who this book is for
- Conventions
- Reader feedback
- Customer support
- Errata
- Piracy
- Questions
- 1. Understanding vSphere Storage Concepts and Methodologies
- Storage virtualization
- Supported filesystems
- VMFS
- NFS
- Raw disk
- Storage naming
- Viewing device identifiers
- Within the vSphere Client
- Within ESXi Shell
- The many ways vSphere identifies storage
- Friendly names
- Identifiers
- NAA identifiers
- T10 identifiers
- IQN identifiers
- MPX identifiers
- Runtime names
- The vSphere Pluggable Storage Architecture
- Pluggable Storage Architecture (PSA) roles and commands
- Multipathing Plugin - the VMware Native Multipathing Plugin roles and commands
- Storage Array Type Plugin roles and commands
- Path Selection Plugin roles and commands
- An I/O request - from start to finish
- Summary
- 2. Commonly Used Tools for Troubleshooting Storage
- The vSphere troubleshooting methodology
- vCenter Storage Views (Reports and Maps)
- Reports
- Maps
- Using esxtop/resxtop
- Switching displays
- Field customization
- Refresh interval
- Logfiles used in vSphere Storage troubleshooting
- ESXi logging
- Viewing ESXi logs
- vCenter Server logging
- Virtual machine logging
- Summary
- 3. Troubleshooting Storage Visibility
- Common storage visibility issues across block transport types
- ESXi claim rules and LUN masking
- Troubleshooting paths and path selection
- vCenter Server Storage filters.
- Disk resignaturing
- LUN numbering
- Troubleshooting Fibre Channel storage visibility
- Registered State Change Notification (RSCN)
- Identifying and interpreting Fibre Channel connection issues in the logs
- Troubleshooting IP storage visibility
- Verifying network connectivity to our iSCSI and NFS array
- iSCSI and NFS port requirements
- CHAP authentication
- Identifying and interpreting iSCSI storage connection issues in the logs
- Troubleshooting NFS storage
- NFS ACLs
- NFS permissions
- Identifying and interpreting NFS storage connection issues in the logs
- Summary
- 4. Troubleshooting Storage Contention
- Identifying storage contention and performance issues
- Disk adapter latency statistics
- Disk device latency statistics
- Virtual machine latency statistics
- Using vCenter alarms to monitor latency
- Planning - how to properly scale your storage
- Calculating IOPs requirements
- Calculating the number of disks required
- How do we know when we need more IOPs?
- vSphere features to help with latency, contention, placement, and compliance
- Profile-Driven Storage
- Storage DRS for performance
- SCSI reservation conflicts
- Monitoring SCSI reservation conflicts with esxtop
- Resolving excessive SCSI resolutions
- Storage queuing in vSphere
- OS queue
- Adapter queue
- Per-LUN queue
- Viewing queues in ESXi
- vSphere Storage I/O Control
- Configuring Storage I/O Control
- Troubleshooting NAS/iSCSI storage performance
- iSCSI port binding and Round Robin path policy
- Jumbo Frames and MTU size
- Summary
- 5. Troubleshooting Storage Capacity and Overcommitment
- Monitoring datastore usage
- Thin Provisioning
- Array thin provisioning
- Hypervisor (VMDK) thin provisioning
- Monitoring Thin Provisioning
- Snapshots
- Understanding vSphere Snapshots
- Monitoring snapshot disk usage.
- Datastore file management
- Virtual machine swap files
- Increasing the size of our datastores
- Growing a VMFS datastore
- Adding an extent to a VMFS datastore
- Balancing capacity with Storage DRS
- Summary
- A. Troubleshooting Steps
- You cannot connect to your iSCSI storage
- Have all the network requirements for your iSCSI connection been met?
- Various things to check on ESXi
- Have all CHAP requirements been met?
- Has there been any advanced settings dealing with iSCSI incorrectly configured?
- Further check the logs for iSCSI-related errors
- You cannot connect to your NFS storage
- Have all the network requirements for you NFS connection been met?
- Check the settings on your NFS array
- Has there been any advanced settings dealing with NFS incorrectly configured?
- Further check the logs for NFS related errors
- You cannot connect to your Fibre Channel Storage
- Fibre Channel switch zoning
- Check paths to storage array/PSP
- Various things to check on ESXi
- Check the storage array
- Further check the logs for Fibre Channel related errors
- My storage/virtual machine is slow
- Inspect latency values to further pinpoint where performance degradation is occurring
- Ensure that your storage array is handling the demand
- B. Statistics of esxtop
- Overview of esxtop's interactive commands
- Activating different displays
- Field selection
- Field order
- Filtering and sorting the displayed objects
- Other useful information
- esxtop statistics
- C. iSCSI Error Codes
- Interpreting software iSCSI error codes
- Index.
