sstableexpiredblockers
Outputs the SSTables that prevent an SSTable from dropping.
Outputs the SSTables that prevent an SSTable from dropping.
Identify the SSTables that are blocking dropping of entire SSTables during compaction. SSTables are dropped during compaction only when they contain only expired tombstones and are guaranteed not to cover any data in other SSTables.
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
sstableexpiredblockers [--dry-run] keyspace_name table_name
| 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
- --dry-run
- Test command syntax and environment. Do not execute the command.
- keyspace_name
- Keyspace name. Required.
- table_name
- Table name. Required.
Examples
Output the blocking SSTables that prevent an SSTable from dropping
sstableexpiredblockers cycling cyclist_races
Test the output without executing sstableexpiredblockers
sstableexpiredblockers --dry-run cycling cyclist_races