sstableupgrade

cassandra.yaml

The location of the cassandra.yaml file depends on the type of installation:

Package installations	/etc/dse/cassandra/cassandra.yaml
Tarball installations	`installation_location`/resources/cassandra/conf/cassandra.yaml

Upgrades the SSTables in the given table or snapshot to the current version of Cassandra.

Synopsis

sstableupgrade 
[--debug] 
[-h | --help] 
[[-k | --keep-source] | [--keep-generation]] 
[-b | --backups]  
[-o | --output-dir output-dir] 
[--schema schema-file [--schema schema-file2 ... ]]
[-t | --throughput rate-limit] 
[--temp-storage tmp-dir]
keyspace_name 
table_name
[snapshot_name]

SSTable compatibility

For details on SSTable versions and compatibility, see DataStax Enterprise, Apache Cassandra, CQL, and SSTable compatibility.

Definition

The short form and long form parameters are comma-separated.

Command arguments

--debug

Display stack traces.

-h, --help

Display the usage and listing of the commands.

-k, --keep-source

Do not delete the source SSTables. Do not use with the --keep-generation option.

-b, --backups

Rewrite incremental backups for the given table. May not be combined with the snapshot_name option.

--keep-generation

Keep the SSTable generation. Do not use with the --keep-source option.

-o, --output-dir

Rewritten files are placed in output-dir/keyspace-name/table-name-and-id.

--schema

Allows upgrading and downgrading SSTables using the schema of the table in a CQL file containing the DDL statements to re-create the schema. Must be a DDL file that allows the recreation of the table including dropped columns. Repeat the option to specify multiple DDL schema files.

Important: Always use the schema.cql from a snapshot of the table so that the DDL has all of the information omitted by DESCRIBE TABLE, including dropped columns.

-t, --throughput

Set to limit the maximum disk read rate in MB/s.

--temp-storage

When used with --schema, specifies location of temporary data. Directory and contents are deleted when the tool terminates. Directory must not be shared with other tools and must be empty. If not specified the default directory is /tmp.

keyspace_name

Keyspace name. Required. Overrides the client_encryption_options in .

table_name

Table name. Required.

snapshot_name

Snapshot name.

Rewrites only the specified snapshot.
Replaces files in the given snapshot and breaks any hard links to live SSTables.
Required before attempting to restore a snapshot taken in a different DSE version than the one that is currently running.

Examples

Upgrade events table in the cycling keyspace

sstableupgrade cycling events

Found 0 sstables that need upgrading.

The SSTables are already on the current version, so the command returns immediately and no action is taken.