Snapshots shell

hbase shell with snapshot commands

• snapshot <snapshot name> <table name>
  • Take a snapshot of the specified name with the specified name
• restore_snapshot <snapshot name>
  • Restore specified snapshot on the original table
• clone_snapshot <snapshot name> <table name>
  • Create a new table based on the snapshot content
• list_snapshots [filter]
  • Show the list of snapshots taken
• delete_snapshot <snapshot name>
  • Remove a specified snapshot
• rename_snapshot <snapshot name> <new snapshot name>
  • Rename a snapshot to a new name

Restore Table

Given a "snapshot name" restore override the original table with the snapshot content.
Before restoring a new snapshot of the table is taken, just to avoid bad situations.
This allows a full and quick rollback to a previous snapshot.

Clone from Snapshot

Given a "snapshot name" a new table is created with the content of the specified snapshot.

This operation allows:

• To have an old version of the table in parallel with the current one.
  • Look at snapshot side-by-side with the "current" before making the decision whether to roll back or not
• To Add/Remove data from this table without affecting the original one or the snapshot.
• To Restore only "individual items" (only some small range of data was lost from "current")
  • MR job that scan the cloned table and update the data in the original one. (Partial restore of the data)

Open points

• Add snapshot type option on take snapshot command (global, timestamp)?