# Parallelism in CloverETL **URL:** \ **Category:** CloverDX Platform\ **Created:** [April 22, 2014, 12:00am UTC](https://forum.cloverdx.com/t/parallelism-in-cloveretl/1393 "2014-04-22T00:00:00Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![sameerj365](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@sameerj365](https://forum.cloverdx.com/u/sameerj365)\ **Post date:** [April 22, 2014, 12:00am UTC](https://forum.cloverdx.com/t/parallelism-in-cloveretl/1393/1 "2014-04-22T00:00:00Z")
Does CloverETL have layout parallelism like Ab Initio. In Ab\> Initio we can run as many processes of same component based on the depth of layout. For e.g. if there is a Reformat component which is reading a multifile which is 4 way partitioned then Reformat will also run 4-way which means internally it will fork 4 Reformat processes on the same server. Looking at the help file, it seems like the parallelism in built at the server level and not at the component/layout/flow level. Appreciate if someone can explain whether this is possible in CloverETL. Also, is there any chance to implement it in future versions ---
**Author:** ![dpavlis](https://avatars.discourse-cdn.com/v4/letter/d/90ced4/32.png) [@dpavlis](https://forum.cloverdx.com/u/dpavlis)\ **Post date:** [April 22, 2014, 10:04am UTC](https://forum.cloverdx.com/t/parallelism-in-cloveretl/1393/2 "2014-04-22T10:04:32Z")
The CloverETL Cluster offers similar kind of parallelism to AbInitio - [look at this presentation on Slideshare](http://www.slideshare.net/cloveretl/cloveretl-cluster). ---
**Author:** ![sameerj365](https://avatars.discourse-cdn.com/v4/letter/s/47e85d/32.png) [@sameerj365](https://forum.cloverdx.com/u/sameerj365)\ **Post date:** [May 2, 2014, 3:06am UTC](https://forum.cloverdx.com/t/parallelism-in-cloveretl/1393/3 "2014-05-02T03:06:29Z")
Thank you for your reply. However, I still see some huge difference. Can Clover Spawn multiple processes on a single server utilising multiple cores. I am just trying to compare it with our current Ab Initio graphs which works 8 way parallel. I have a 8 way parallel file which is MFS i.e. multiple file system and the whole graph itself runs 8 way. In Clover, if I need to perform the same thing then it needs node allocation which means unless I dont have cluster environment , the whole graph cannot run in parallel mode. Please correct me if I am wrong. Regards, Sameer ---
**Author:** ![dpavlis](https://avatars.discourse-cdn.com/v4/letter/d/90ced4/32.png) [@dpavlis](https://forum.cloverdx.com/u/dpavlis)\ **Post date:** [May 2, 2014, 12:55pm UTC](https://forum.cloverdx.com/t/parallelism-in-cloveretl/1393/4 "2014-05-02T12:55:16Z")
Clover is using “Allocation” to define how many copies of certain component will be started. Allocation can be defined: - through “Partitioned sandbox” reference - that means how many partitions the sandbox has, so many copies and at those individual nodes included in the partitioned sandbox will be run - similar to MFS layout - through list of nodes of cluster - so on each node one instance of such component(s) will be run. (one particular node can be listed more than once, it increases the n-way factor). - through a number - number specifies how many instances will be run So you don’t actually need a cluster of CloverETL nodes. One server (with clustering option enabled) is enough and you can just define (even dynamically through parameter) how many instances of component/set of components should be executed. Of course you need to use components which partition data and gather at the end, but your main processing flow can be run n-way parallel even on a single machine - just utilising more core and possibly writing in parallel to multiple attached disks (through the setup of Partitioned sandbox - a’la MFS, which can also exist just as individual disks/subdirs on single machine). So essentially CloverETL offers similar MPP capabilities to AbInitio. If you are serious about Clover and its MPP, you can contact us at info@cloveretl.com and we can arrange a demo of the mentioned functionality.