It's a tutorial about creating new rules for SonarQube analysis to be applied to Unit Tests. It is not trivial and involves a few tricky database steps, so I want to share my tutorial about it.It's a tutorial about creating new rules for SonarQube analysis to be applied to Unit Tests. It is not trivial and involves a few tricky database steps, so I want to share my tutorial about it.
HBase is by design a columnar store, that is optimized for random reads. You just ask for a row using rowId as an identifier and you get your data instantaneously.
Performing a scan on part or whole table is a completely different thing. First of all, it is sequential. Meaning it is rather slow, because it doesn't use all the RegionServers at the same time. It is implemented that way to realize the contract of Scan command - which has to return results sorted by key.
So, how to do this efficiently?HBase is by design a columnar store, that is optimized for random reads. You just ask for a row using rowId as an identifier and you get your data instantaneously.
Performing a scan on part or whole table is a completely different thing. First of all, it is sequential. Meaning it is rather slow, because it doesn't use all the RegionServers at the same time. It is implemented that way to realize the contract of Scan command - which has to return results sorted by key.
So, how to do this efficiently?
Ostatnio poznałem ciekawe narzędzie do manipulacji schematami bazy danych. Oracle SQL Developer się nazywa i nie służy tylko do baz Oracle. Ponieważ pracuję obecnie przy projekcie opartym o MS SQL, to potrzebowałem możliwości połączenia z M...Ostatnio poznałem ciekawe narzędzie do manipulacji schematami bazy danych. Oracle SQL Developer się nazywa i nie służy tylko do baz Oracle. Ponieważ pracuję obecnie przy projekcie opartym o MS SQL, to potrzebowałem możliwości połączenia z M...
