mirror of
https://github.com/scylladb/scylladb.git
synced 2026-05-31 20:16:43 +00:00
e5f0314afd
This change is intended to make migration process safer and easier. All column families will now have a directory called upload. With this feature, users may choose to copy migrated sstables to upload directory of respective column families, and call 'nodetool refresh'. That's supposed to be the preferred option from now on. For each sstable in upload directory, refresh will do the following: 1) Mutate sstable level to 0. 2) Create hard links to its components in column family dir, using a new generation. We make it safe by creating a hard link to temporary TOC first. 3) Remove all of its components in upload directory. This new code runs after refresh checked for new sstables in the column family directory. Otherwise, we could have a generation conflict. Unlike the first step, this new step runs with sstable write enabled. It's easier here because we know exactly which sstables are new. After that, refresh will load new sstables found in column family and upload directories. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com>