> -----Original Message-----
> From: Donal Lafferty [mailto:donal.laffe...@citrix.com]
> Sent: Wednesday, July 03, 2013 1:44 PM
> To: dev@cloudstack.apache.org
> Subject: Problems with using the TemplateObjectTO's checksum
>
> I'm trying to improve the performance of CopyCommand when copying a
> TemplateObjectTO to a TemplateObjectTO. On Hyper-V this happens when
> a template is downloaded from S3 to the hypervisor's primary data store.
>
> I notice that the checksum on a TemplateObjectTO cannot be used to verify
> that an uncompressed image already exists on the destination. E.g. for a
> System VM template, the checksum corresponds to the .bz2 file, and not
> the .vhd
Do you update template.sql with the uncompressed template url, and checksum?
For example, the following entry should be updated properly for both "checksum"
field and "url" filed:
INSERT INTO `cloud`.`vm_template` (id, uuid, unique_name, name, public,
created, type, hvm, bits, account_id, url, checksum, enable_password,
display_text, format, guest_os_id, featured, cross_zones, hypervisor_type)
VALUES (9, UUID(), 'routing-9', 'SystemVM Template (HyperV)', 0, now(),
'SYSTEM', 0, 32, 1,
'http://download.cloud.com/templates/acton/acton-systemvm-02062012.vhd.bz2',
'f613f38c96bf039f2e5cbf92fa8ad4f8', 0, 'SystemVM Template (HyperV)', 'VHD', 15,
0, 1, 'Hyperv' );
>
> Should I store only the compressed image, and take a performance hit during
> uncompression? Or can I update the checksum for the TemplateObjectTO?
>
> Any suggestions welcome,
>
> DL
