Thanks Robert. When I look at column families files it seems like the format is:
[keyspace]-[cf]-jb-[number]-CompressionInfo.db [keyspace]-[cf]-jb-[number]-Data.db [keyspace]-[cf]-jb-[number]-Filter.db [keyspace]-[cf]-jb-[number]-Index.db [keyspace]-[cf]-jb-[number]-Statistics.db [keyspace]-[cf]-jb-[number]-Summary.db [keyspace]-[cf]-jb-[number]-TOC.txt So basically when I rename all files during merge of keyspaces, I will substitute dest keyspace, column family is the same cause it is same scheme, and I will chose arbitrary number just to avoid collision, correct? What is the range? I can select any number? Regards, Pavel On Fri, Jun 27, 2014 at 1:35 PM, Robert Coli <rc...@eventbrite.com> wrote: > On Fri, Jun 27, 2014 at 8:28 AM, Pavel Kogan <pavel.ko...@cortica.com> > wrote: > >> I want to merge one keyspace (A) data into another (B) with exactly same >> scheme. The partition keys of all records are unique in both keyspaces. Can >> I just copy all files under keyspace A column families into keyspace B >> column families folders, after running nodetool flush? Is filenames >> collision possible? >> > > 1) yes, you can do this. the most space efficient way to do so would be > with hard links. [1] > > 2) yes, filename collision is possible, be careful to avoid it. > > 3) you should copy/hard-link/move the files with the node down, instead of > trying to use "nodetool refresh" (which is unsafe) > > =Rob > [1] > https://issues.apache.org/jira/browse/CASSANDRA-1585?focusedCommentId=13488959&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13488959 > > >
