[ovirt-users] ovirt sdk and pipelining

[nicolas at devels.es]

El 2017-06-16 08:52, Fabrice Bacchella escribió:
> I just read the blog entry about performance increate in for the
> python sdk
> (https://www.ovirt.org/blog/2017/05/higher-performance-for-python-sdk/).
> 
> I'm quite sceptical about pipelining.
> 

I disagree. Even without reading the post you mention, we already 
noticed that since this version everything is working much faster than 
with prior versions. We have a lot of stuff implemented with Python-SDK 
but on one of them the effect is quite notorious: A script checks VMs' 
permissions and takes decisions based on them. Without pipelining this 
script took about 5 minutes to execute, with pipelining it doesn't take 
more than 15 seconds on a ~1000VMs infrastructure.

Regards,

Nicolás

> A few explanation about that can be found at:
> https://devcentral.f5.com/articles/http-pipelining-a-security-risk-without-real-performance-benefits
> https://stackoverflow.com/questions/14810890/what-are-the-disadvantages-of-using-http-pipelining
> 
> It also talks about multiple connection, but don't use
> pycurl.CurlShare(). I thing this might be very helpfull, as it allows
> to share cookies, see
> https://curl.haxx.se/libcurl/c/CURLOPT_SHARE.html.
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