topic what are sequential and parallel reloads? in QlikView

what are sequential and parallel reloads?

abhaysingh — Thu, 14 Jan 2016 08:48:01 GMT

Hi All,

Can any one help me to understand Sequential and Parallel Reloads in qlik?

Regards

Abhay

Re: what are sequential and parallel reloads?

tresB — Thu, 14 Jan 2016 08:56:53 GMT

As the word suggest itself:

Sequential reload: multiple reload run one-after-another, i.e. - the second reload can only start when the first one is over.

Parallel reload: more than one reloads run simultaneously in the same system.

Re: what are sequential and parallel reloads?

abhaysingh — Thu, 14 Jan 2016 08:59:37 GMT

thanks tresesco, but i would like to understand the concept of it apart from it. with any example if possible

Re: what are sequential and parallel reloads?

manojkulkarni — Thu, 14 Jan 2016 09:05:08 GMT

Sequential reload: As name suggests, load will one after other. eg: This will be more usefull when you need to make any operation or aggregate on already loaded data. So you next load is dependent on the previous one.

Parallel Load: You have different set of data present, where in there is dependency but load time is constraint. Then you go for parallel load to reduce the reload time of operation.

But I don't think you can do parallel load in single QVW application. It has to be from multiple applications.

Re: what are sequential and parallel reloads?

tresB — Thu, 14 Jan 2016 09:08:26 GMT

In server environment, you would get an option that lets you set maximum number (default - 4, I guess) of simultaneous application that can be reloaded (i.e- parallel reload). This is important, because if you allow too many application to be reloaded at the same time, the server resource might reach a bottle neck, would affect the performance negatively.

Hope this gives you an idea.

Re: what are sequential and parallel reloads?

mithilesh17 — Thu, 14 Jan 2016 09:10:04 GMT

Hi,

As far as I know dependency is there in sequential (one reload have to be completed before second i.e. second is dependent on first, there is an option in QMC as Dependency under Documents-> Reload) and in parallel reload, concurrent reloads can be take place at once.

HTH.

Regards,