[storm] Consistent multithreaded operations

Jamu Kakar jkakar at kakar.ca
Fri Sep 5 18:07:36 BST 2008


Hi,

NeedBenzyn NeedBenzyn wrote:
> The problem I think is there is no lock put on the selected row after 
> the first thread has read it - On Mysql it'is handled with running the 
> query with "SELECT ... FOR UPDATE"  or "SELECT ... LOCK IN SHARE MODE"
> 
> Any idea on how to make storm using this behaviour ?

Which table engine are you using?  I believe only one of them,
InnoDB, has proper transaction support.  This may be the issue.  By
default, Storm will attempt to run your statements in a transaction.

Thanks,
J.



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