.schema is column group's schema file; .btschema is Zebra table's schema file; .meta is column group's index file.
The bottom line is that they are all internal files maintained by Zebra and users should not access or manipulate them directly. Also, the storage format by Zebra is probably different from that used by you data already on HDFS.
In summary, you have to use Zebra to generate Zebra data and no other data format can be used by Zebra.
From: Renato Marroquín Mogrovejo
Sent: Sunday, October 24, 2010 1:15 PM
Subject: Using data with Zebra
Hi there, I have some doubts about zebra usage.
The thing is that all my data is already in HDFS, and want to use the zebra
storers and loaders, but I don't want to reprocess all my data just to get
the .meta, .schema and the .btschema files, and by the way how are those
files related? I mean they all keep file's metadata, right?
Is there any way I can create the necessary files to use zebra's loaders and
storers functionality? Any advice or suggestion is highly appreciated.
Thanks in advanced.