[ovirt-users] Spam Re: Spam Latency

[Daniel Helgenberger]

Hi Maurice,

I have the same issue, and already read several other people noticing
the same. IIRC (sadly I do not find the mails anymore, I keep the list
only for one month) this may have something to do with log file noise,
setting them to 'warning' may help, see below for an example.

Since I observed high network IO with little no disk traffic, I suspect
the disk image is converted to RAW and compressed again; making oVirt
neartly unusable with multi terrabyte disk images (my test took about
3hs/TB).

Can someone clarify the export / template creation process?

Thanks,
Daniel

------
cat /etc/vdsm/logger.conf

[loggers]
keys=root,vds,Storage,metadata,ovirt_hosted_engine_ha

[handlers]
keys=console,syslog,logfile,metadata

[formatters]
keys=long,simple,none,sysform

[logger_root]
level=WARNING
handlers=syslog,logfile
propagate=0

[logger_vds]
level=WARNING
handlers=syslog,logfile
qualname=vds
propagate=0

[logger_Storage]
level=WARNING
handlers=logfile
qualname=Storage
propagate=0

[logger_metadata]
level=WARNING
handlers=metadata
qualname=irs.metadata
propagate=0

[logger_ovirt_hosted_engine_ha]
level=ERROR
handlers=
qualname=ovirt_hosted_engine_ha
propagate=1

[handler_syslog]
level=WARNING
class=handlers.SysLogHandler
formatter=sysform
args=('/dev/log', handlers.SysLogHandler.LOG_USER)

[handler_logfile]
class=logging.handlers.WatchedFileHandler
args=('/var/log/vdsm/vdsm.log',)
filters=storage.misc.TracebackRepeatFilter
level=WARNING
formatter=long

[handler_metadata]
class=logging.handlers.WatchedFileHandler
args=('/var/log/vdsm/metadata.log',)
level=WARNING
formatter=long

[handler_console]
class: StreamHandler
args: []
formatter: none

[formatter_simple]
format: %(name)s:%(levelname)s:  %(message)s

[formatter_none]
format: %(message)s

[formatter_long]
format: %(threadName)s::%(levelname)s::%(asctime)s::%(module)s::
%(lineno)d::%(name)s::(%(funcName)s) %(message)s

[formatter_sysform]
format= vdsm %(name)s %(levelname)s %(message)s
datefmt=




On Do, 2014-06-26 at 21:14 -0400, Maurice James wrote:
> Wow this is a new record for an action 
> Snapshot removal: 
> started at 18:31 
> finished at 21:02 
> 50GB thin provisioned disk. Actual size 30GB 
> ----- Original Message -----
> 
> From: "Maurice James" <mjames at media-node.com> 
> To: "users" <users at ovirt.org> 
> Sent: Thursday, June 26, 2014 7:42:45 PM 
> Subject: [ovirt-users] Spam Latency 
> 
> I noticed that the following operations take way, way too long: 
> 
> Any type of import/export (VM, template. etc.) 
> Disk migration 
> Snapshot deletion 
> 
> These operations take over 60 minutes, most of the time pushing 90 minutes. I know I don't have the fastest storage disks but wow, up to 90 minutes?. 
> My NFS storage is on a 4 disk RAID 5. 7200rpm disks. 2GBps network connection. 
> 
> Specs: 
> Cluster of 4 Dell R420 
> Dual 6 core Xeon 
> 32 GB Ram per server 
> 4 500GB 7200 rpm disks RAID 5 
> 
> 
> 
> _______________________________________________ 
> Users mailing list 
> Users at ovirt.org 
> http://lists.ovirt.org/mailman/listinfo/users 
> 
> _______________________________________________
> Users mailing list
> Users at ovirt.org
> http://lists.ovirt.org/mailman/listinfo/users

-- 

Daniel Helgenberger 
m box bewegtbild GmbH 

P: +49/30/2408781-22
F: +49/30/2408781-10

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