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RE: [Xen-API] lowlevel access to xapi database

To: Jonathan Ludlam <Jonathan.Ludlam@xxxxxxxxxxxxx>
Subject: RE: [Xen-API] lowlevel access to xapi database
From: George Shuklin <george.shuklin@xxxxxxxxx>
Date: Fri, 18 Feb 2011 20:56:21 +0300
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We running separate database of virtual machines for our purposes and
around 1000-1500 VM's syncing starts to be too long and slow.

I thought we can use some non-RPC based mechanism to access database
(even if this will cost us compability with other versions of xapi).

/json actually is RPC too, so it take too much time to use in very
'lively' environment.

We need last_boot to know about shutdown reason - it pretty important

В Пт., 18/02/2011 в 10:17 +0000, Jonathan Ludlam пишет:
> Hi George,
> What do you mean by 'fast sync'? Are you using the event.next api? And were 
> you aware of the /json hack that's used for some web gui type things?
> What's the concern with other_config? That's not abnormal XMLRPC encoding as 
> far as I know. I agree that Last_boot_record stands out as being slightly 
> odd, but it's really only intended for internal use.
> Jon
> -----Original Message-----
> From: George Shuklin [mailto:george.shuklin@xxxxxxxxx] 
> Sent: 17 February 2011 23:57
> To: Jonathan Ludlam
> Cc: xen-api@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-API] lowlevel access to xapi database
> Thank you.
> We actually wish to have fast sync and XML-RPC seems be to bloated and 
> have very strange issues with inner objects conversions (f.e. last_boot, 
> other config and many others strings with format 'parse it yourself').
> And we feel it can be really interesting to change some values of object 
> unchangable via XenAPI, for example set every PV VM marked as 
> 'pv-drivers-up-to-date' (is this field have any meaning for PV guest?), 
> change their limits without shutdown (they will take place at near 
> reboot time) and many others.
> On 17.02.2011 12:40, Jonathan Ludlam wrote:
> > Not yet, it's internal only. Is there anything you need at the database 
> > level that's not available in the API?
> >
> > Jon
> >
> > On 10 Feb 2011, at 17:55, George Shuklin wrote:
> >
> >    
> >> Good day.
> >>
> >> I wonder if there is way to access xapi data lower than XenAPI... I
> >> means any other way to access them form host where xapi master
> >> resides...
> >>
> >> I look to sources and found some DB interface. It it available outside
> >> xapi binary?
> >>
> >> And I saw some json-related functions. Is any way to get access to data
> >> in json format?
> >>
> >> Thanks.
> >>
> >>
> >> _______________________________________________
> >> xen-api mailing list
> >> xen-api@xxxxxxxxxxxxxxxxxxx
> >> http://lists.xensource.com/mailman/listinfo/xen-api
> >>      
> >    

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