Hi there,
I would like to select a subset of a Accumulo talbe and refactor the keys to
create a new table.
There are about 30M records with a value size about 5-20KB each.
I'm using Accumulo 1.8.0 and Java accumulo-core client library 1.8.0.
I've written client code like that:
* create a scanner fetching a specific column in a specific range
* transforming the key into the new schema
* using a batch writer to write the new generated mutations into the new table
scan = createScanner(FROM, auths)
// range, fetchColumn
writer = createBatchWriter(TO, configWriter)
iter = scan.iterator()
while (iter.hasNext()) {
entry = iter.next()
// create mutation with new key schema, but unaltered value
writer.addMutation(mutation)
}
writer.close()
But this is slow and error prone (hiccups, ...).
Is it possible to use the Accumulo shell for such a task?
Are there another solutions I can use or some tricks?
Thank you very much for any advices!
Regards,
Sven
--
Sven Hodapp, M.Sc.,
Fraunhofer Institute for Algorithms and Scientific Computing SCAI,
Department of Bioinformatics
Schloss Birlinghoven, 53754 Sankt Augustin, Germany
sven.hod...@scai.fraunhofer.de
www.scai.fraunhofer.de
