Solved

Zfs nexenta: howto create log/cache

Posted on 2013-01-01
6
941 Views
Last Modified: 2013-01-02
Please advise howto create cache/logdeive. When I try to create a mirrored volume for log, it says that I have to create a volume first ...?

The error exactly:

Cannot create volume only with log or spare disks: Please add disks to pool This configuration will be used to create volume.

log
0
Comment
Question by:janhoedt
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 3
6 Comments
 
LVL 121
ID: 38735069
did you install Napp-it?

do you have spare disks, to add as log (ZIL) or cache (ARC) ?

to add cache (arc)

zpool add tank cache c4t2d0
zpool add tank cache c4t3d0

where tank is the pool name, and c4t2d0 and c4t3d0 are disks, cache cannot be mirrored.

to add log (zil)

zpool add newpool log mirror c0t6d0 c0t7d0

where newpool is the pool, and c0t6d0 c0t7d0 are disks
0
 

Author Comment

by:janhoedt
ID: 38735972
Thanks, but I really like the gui to configure, helps me to understand zfs concepts. Does screenshot above help to clarify my problem?
It says to add disks to pool, but when I add disks to pool, I don t see option to make log or cache disks.
0
 
LVL 121
ID: 38736091
you have to add logs and cache to a pool.
0
Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

 

Author Comment

by:janhoedt
ID: 38736133
Both to same pool?
0
 
LVL 121

Accepted Solution

by:
Andrew Hancock (VMware vExpert / EE MVE^2) earned 500 total points
ID: 38736140
yes, both ZIL (log) and ARC (cache) are allocated to a pool.

if you open a console, using Nexenta GUI and type zpool status, you will see the status and disks added to your pool.

did you not add log and cache disks at creation?
0
 

Author Comment

by:janhoedt
ID: 38736270
Ok, found it: you need to "grow" the existing volume (for me the zraid on SATA disks), then you can choose disks for log and cache.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Veeam Backup & Replication has added a new integration – Veeam Backup for Microsoft Office 365.  In this blog, we will discuss how you can benefit from Office 365 email backup with the Veeam’s new product and try to shed some light on the needs and …
Giving access to ESXi shell console is always an issue for IT departments to other Teams, or Projects. We need to find a way so that teams can use ESXTOP for their POCs, or tests without giving them the access to ESXi host shell console with a root …
Teach the user how to install and configure the vCenter Orchestrator virtual appliance Open vSphere Web Client: Deploy vCenter Orchestrator virtual appliance OVA file: Verify vCenter Orchestrator virtual appliance boots successfully: Connect to the …
This video shows you how easy it is to boot from ISO images for virtual machines with the ISO images stored on a local datastore on the ESXi host.
Suggested Courses

615 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question