cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <>
Subject Re: batch dump of data from cassandra?
Date Mon, 23 May 2011 04:56:19 GMT
I'd modify SSTableExport.serializeRow (the sstable2json class) to
output to whatever system you are targeting.

On Sun, May 22, 2011 at 11:19 PM, Yang <> wrote:
> let's say periodically (daily) I need to dump out the contents of my
> Cassandra DB, and do a import into oracle , or some other custom data
> stores,
> is there a way to do it?
> I checked that you can do multi-get() but you probably can't pass the
> entire key domain into the API, cuz the entire db would be returned on
> a single thrift call, and probably overflow the
> API? plus multi-get underneath just sends out per-key lookups one by
> one, while I really do not care about which key corresponds to which
> result, a simple scraping of the underlying SSTable would
> be perfect, because I could utilize the file cache coherency as I read
> down the file.
> Thanks
> Yang

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support

View raw message