sstablelevelreset

Resets the level to zero on a set of SSTables using LeveledCompactionStrategy while the DSE node is offline.

Uses LeveledCompactionStrategy to reset the level to zero on a set of SSTables while the DSE node is offline. If the SSTable is already at level 0, no change occurs. If the SSTable is releveled, the metadata is rewritten to designate the level at 0.

Restriction: Stop DataStax Enterprise before you run this command.
The default location of this SSTable tool depends on the type of installation:
  • Package installations: /usr/bin/
  • Tarball installations: installation_location/resources/cassandra/tools/bin

Synopsis

sstablelevelreset 
[--really-reset] 
keyspace_name table_name
Table 1. Legend
Syntax conventions Description
UPPERCASE Literal keyword.
Lowercase Not literal.
Italics Variable value. Replace with a valid option or user-defined value.
[ ] Optional. Square brackets ( [ ] ) surround optional command arguments. Do not type the square brackets.
( ) Group. Parentheses ( ( ) ) identify a group to choose from. Do not type the parentheses.
| Or. A vertical bar ( | ) separates alternative elements. Type any one of the elements. Do not type the vertical bar.
... Repeatable. An ellipsis ( ... ) indicates that you can repeat the syntax element as often as required.
'Literal string' Single quotation ( ' ) marks must surround literal strings in CQL statements. Use single quotation marks to preserve upper case.
{ key:value } Map collection. Braces ( { } ) enclose map collections or key value pairs. A colon separates the key and the value.
<datatype1,datatype2> Set, list, map, or tuple. Angle brackets ( < > ) enclose data types in a set, list, map, or tuple. Separate the data types with a comma.
cql_statement; End CQL statement. A semicolon ( ; ) terminates all CQL statements.
[ -- ] Separate the command line options from the command arguments with two hyphens ( -- ). This syntax is useful when arguments might be mistaken for command line options.
' <schema> ... </schema> ' Search CQL only: Single quotation marks ( ' ) surround an entire XML schema declaration.
@xml_entity='xml_entity_type' Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrconfig files.

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

Command arguments

keyspace_name
Keyspace name. Required.
--really-reset
Specifies that DSE is stopped.
table_name
Table name. Required.

Examples

Verify DataStax Enterprise is not running

nodetool status
Datacenter: Graph
================================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address        Load       Tokens       Owns    Host ID                               Rack
UN  10.200.177.92  265.04 KiB  1            ?       980cab6a-2e5d-44c6-b897-0733dde580ac  rack1
DN  10.200.177.94  426.21 KiB  1            ?       7ecbbc0c-627d-403e-b8cc-a2daa93d9ad3  rack1

Reset cyclist_name to level 0

Restriction: Stop DataStax Enterprise before you run this command.
sstablelevelreset cycling cyclist_name
Skipped /var/lib/cassandra/data/cycling/cyclist_name-4157ef22ce4411e8949e33016bf887c0/aa-2-bti-Data.db since it is already on level 0
Skipped /var/lib/cassandra/data/cycling/cyclist_name-4157ef22ce4411e8949e33016bf887c0/aa-3-bti-Data.db since it is already on level 0