cloudstack-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Yoshikazu Nojima (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CLOUDSTACK-6369) Qcow2's cluster_size option support
Date Thu, 10 Apr 2014 20:24:14 GMT

     [ https://issues.apache.org/jira/browse/CLOUDSTACK-6369?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yoshikazu Nojima updated CLOUDSTACK-6369:
-----------------------------------------

    Description: 
To improve the qcow2 performance, it is important to tune parameters of "qemu-img create"
command.
preallocation=metadata option, which I am working on in CLOUDSTACK-6191 improves randam IOPS
well, but the qcow2 image created with preallocation=metadata option cannot be used for a
differential image. 
This "cluster_size" option improves IOPS of a differential qcow2 image which is created with
preallocation=off.



  was:
To improve the qcow2 performance, it is important to tune parameters of "qemu-img create"
command.
preallocation=metadata option, which I am working on in CLOUDSTACK-6191 improves randam IOPS
well, but the qcow2 image created with preallocation=metadata option cannot be used as a differential
image. 
This "cluster_size" option improves IOPS of a differential qcow2 image which is created with
preallocation=off.




> Qcow2's cluster_size option support
> -----------------------------------
>
>                 Key: CLOUDSTACK-6369
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-6369
>             Project: CloudStack
>          Issue Type: Improvement
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: KVM
>            Reporter: Yoshikazu Nojima
>            Assignee: Yoshikazu Nojima
>            Priority: Minor
>             Fix For: Future
>
>
> To improve the qcow2 performance, it is important to tune parameters of "qemu-img create"
command.
> preallocation=metadata option, which I am working on in CLOUDSTACK-6191 improves randam
IOPS well, but the qcow2 image created with preallocation=metadata option cannot be used for
a differential image. 
> This "cluster_size" option improves IOPS of a differential qcow2 image which is created
with preallocation=off.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message