dsetool utility
Use the dsetool utility for creating system keys, encrypting sensitive configuration information, and performing Cassandra File System (CFS) and Hadoop-related tasks, such as checking the CFS, and listing node subranges of data in a keyspace.
Use the dsetool utility for creating system keys, encrypting sensitive configuration, and performing Cassandra File System (CFS) and Hadoop-related tasks, such as checking the CFS, and listing node subranges of data in a keyspace.
JMX authentication is supported for dsetool commands. You can also authenticate with the configured Cassandra user on some commands.
Synopsis and dsetool command arguments
$ dsetool [-f config_file] [-l username -p password] [-a jmx_username -b jmx_password] [-h=hostname] [-s=Solr_port] [-j=jmx_port] command args
Syntax conventions | Description |
---|---|
Italics |
Variable value. Replace with a 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. |
[ -- ] |
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. |
Short form | Long form | Description |
---|---|---|
-f |
Path to configuration file that stores credentials. The credentials in this configuration file override the ~/.dserc credentials. | |
-l |
--username | User name for authenticating with the configured Cassandra user. |
-p |
--password | Password to authenticate with the configured Cassandra user. |
-a |
--jmxusername arg | User name for authenticating with secure JMX. |
-b |
--jmxpassword arg | Password for authenticating with secure JMX. |
-c |
--cassandra_port | Cassandra port number. |
-h |
--host arg | Node hostname or IP address. |
-j |
--jmxport arg | Remote JMX agent port number. |
-s |
--port | Solr port number. |
-u |
--use_hadoop_config | Get Cassandra host from Hadoop configuration files. |
dsetool commands
- autojt
- Elects Job Trackers for a specified datacenter, or for all datacenters when none is specified. Automatically manage Job Tracker selection and remove manual selections. If the current manually selected tracker is up, the manually selected Job Tracker continues to be used.
- checkcfs
- Checks a single CFS file or the whole CFS. See checking the CFS using dsetool.
- cleanup_leases
- Deletes stale leaders and assigned candidates.
- create_core keyspace.table [option ...]
- Supports Cassandra password authentication with
[-l username -p password]
.
- createsystemkey algorithm[/mode/padding] secret_key_strength [file] [-k=kmip_groupname [-t kmip_template] [-n namespace]]
- Creates a global encryption key, called a system key, for SSTable encryption using the
following options:
algorithm[/mode/padding] secret_key_strength
- When Java Cryptography Extension (JCE) is installed, the cipher_algorithm options and acceptable secret_key_strength values for the algorithms are:cipher_algorithm secret_key_strength AES/CBC/PKCS5Padding 128, 192, or 256 AES/ECB/PKCS5Padding 128, 192, or 256 DES/CBC/PKCS5Padding 56 DESede/CBC/PKCS5Padding 112 or 168 Blowfish/CBC/PKCS5Padding 32-448 RC2/CBC/PKCS5Padding 40-128 Key strength is not required for HMAC algorithms.
file
- Specify the name of the system key file to create. If no name is specified, the default system key file name is system_key. The default system key file name is not configurable.-k=kmip_groupname
- Use the KMIP connection information to create a remote system key for the KMIP key server group that is defined in the kmip_hosts section in the dse.yaml file. The following options are available only for the specified KMIP key server group:-t kmip_template
- Uses the specified KMIP server key template.-n namespace
- Specifies the namespace to create the system key with.
- encryptconfigvalue
- Encrypts sensitive configuration information. This command takes no arguments and prompts for the value to encrypt.
- get_core_config keyspace.table [current=true|false]
- Outputs the latest uploaded solrconfig.xml resource file for the specified core. If current is set to true, returns the current live solrconfig.
- get_core_schema keyspace.table [current=true|false]
- Supports Cassandra password authentication with
[-l username -p password]
.
- infer_solr_schema keyspace.table [coreOptions path_to_options_file]
- Supports Cassandra password authentication with
[-l username -p password]
.
- inmemorystatus [keyspace.table]
- Provides the memory size, capacity, and percentage for this node and the amount of memory each table is using. To get information about a single table, specify the keyspace and table. The unit of measurement is MB. Bytes are truncated.
- jobtracker
- Returns the Job Tracker hostname and port. Returns the Job Tracker that is local to the data center from which you are running the command. See managing the Job Tracker using dsetool commands.
- list_subranges keyspace.table keys_per_range start_token, end_token
- Divides a token range for a given keyspace/table into a number of smaller subranges of approximately keys_per_range. To be useful, the specified range should be contained by the target node's primary range. See Listing sub-ranges using dsetool.
- listjt
- Lists all Job Tracker nodes grouped by the datacenter that is local to them.
- managekmip subcommand kmip_groupname [command_arguments]
- Verifies communication with the specified KMIP key server and lists the KMIP encryption keys on that key server. The follow
subcommands are supported:
- list kmip_groupname [namespace=key_namespace]
- Lists the encryption keys on the specified KMIP host. You can optionally specify the namespace.
- expirekey kmip_groupname key_id [datetime]
- Specifies an expiration date and time for the specified encryption key. After the
specified datetime, no new data will be encrypted with the key. Data can
be decrypted with the key after this expire date/time. If an expire date/time is not
specified, the key is expired immediately.
Format of datetime is YYYY-MM-DD HH:MM:SS:T. For example, use 2016-04-13 20:05:00:0 to expire the encryption key at 8:05 p.m. on 13 April 2016.
- revoke kmip_groupname key_id
- Revokes the specified encryption key. After a key is revoked, the key cannot be used to decrypt data.
- destroy kmip_groupname key_id
- Destroys the specified encryption key. After a key is destroyed, the key cannot be used to decrypt data.
- movejt
- Moves the Job Tracker and notifies the Task Tracker nodes. This option has been deprecated. Use setjt and setrjt.
- node_health
- Retrieves a dynamic score between 0 and 1 that describes the health
of the specified DataStax Enterprise node. A higher score indicates better node health.
Nodes that have a large number of dropped mutations and nodes that are just started have a
lower health score.
$ dsetool -h IP_address node_health
where IP_address is the IP address that is output by thedsetool ring
command.For example:$ dsetool -h 200.192.10.11 node_health Node Health: 0.7
If you do not specify the IP address, the default is the local DataStax Enterprise node.
- partitioner
- Returns the fully qualified classname of the IPartitioner that is in use by the cluster.
- perf subcommand
- Modifies performance object settings as described in the subcommand section.
- read_resource keyspace.table name=resfilename
- Supports Cassandra password authentication with
[-l username -p password]
.
- rebuild_indexes keyspace.table [idx1,idx2,...]
- Rebuilds specified secondary indexes for specified keyspace/table. To rebuild all indexes,
do not specify indexes and use only
rebuild_indexes keyspace.table
.
- reload_core keyspace.table [option ...]
- Supports Cassandra password authentication with
[-l username -p password]
.
- repaircfs
- Repairs the CFS from orphan blocks.
- ring
- Lists the nodes in the ring, including their node type.
- setjt IP_address_of_JobTracker_node
- Moves the JobTracker to the specified node and notifies the TaskTracker nodes of the change.
- setrjt IP_address_of_reserve_JobTracker_node
- Moves the reserve JobTracker node to the specified IP address and notifies the TaskTracker nodes of the change.
- sparkmaster [subcommand]
- Unless a subcommand is provided, this command returns the address of Spark Master running
in a datacenter. Otherwise, this command executes a subcommand related to Spark Master.
cleanup
- Drops and recreates the Spark Master recovery table.cleanup data_center_name
- Removes recovery data for the specified datacenter.
- sparkworker restart
- Manually restarts the Spark Worker on the selected node, without restarting the node.
- status
- Lists the nodes in their ring, including the node type. Same as the ring command.
- token --generate|cancel
- Only for Kerberos authentication: obtains or cancels a delegation token. See Using dsetool with Kerberos.
Checking the CFS using dsetool
$ dsetool checkcfs cfs:///
$ dsetool checkcfs /tmp/myhadoop/mapred/system/jobtracker.info
Listing sub-ranges using dsetool
$ dsetool [-h hostname ] list_subranges keyspace table rows_per_subrange start_token end_token
- rows_per_subrange - The approximate number of rows per subrange.
- start_partition_range - The start range of the node.
- end_partition_range - The end range of the node.
$ dsetool list_subranges Keyspace1 Standard1 10000 113427455640312821154458202477256070485 0
Output
Start Token End Token Estimated Size ------------------------------------------------------------------------------------------------ 113427455640312821154458202477256070485 132425442795624521227151664615147681247 11264 132425442795624521227151664615147681247 151409576048389227347257997936583470460 11136 151409576048389227347257997936583470460 0 11264
Nodetool repair command options
$ nodetool repair keyspace table -st start_token -et end_token
$ nodetool repair Keyspace1 Standard1 -st 113427455640312821154458202477256070485 -et 132425442795624521227151664615147681247 $ nodetool repair Keyspace1 Standard1 -st 132425442795624521227151664615147681247 -et 151409576048389227347257997936583470460 $ nodetool repair Keyspace1 Standard1 -st 151409576048389227347257997936583470460 -et 0
These commands begins an anti-entropy node repair from the start partition range to the end partition range.
Performance object subcommands
Subcommand name | Possible values | Description |
---|---|---|
clustersummary | - enable|disable | Toggle cluster summary statistics. See Collecting database summary diagnostics. |
cqlslowlog | - threshold - enable|disable |
Set the CQL slow log threshold. Toggle the CQL slow log. See Collecting slow queries. |
cqlsysteminfo | - enable|disable | Toggle CQL system information statistics. See Collecting system level diagnostics. |
dbsummary | - enable|disable | Toggle database summary statistics. See Collecting database summary diagnostics. |
histograms | - enable|disable | Toggle table histograms. See Collecting table histogram diagnostics. |
resourcelatencytracking | - enable|disable | Toggle resource latency tracking. See Collecting system level diagnostics. |
solrcachestats | - enable|disable | Toggle Solr cache statistics. |
solrindexingerrorlog | - enable|disable | Toggle Solr indexing error log. |
solrindexstats | - enable|disable | Toggle Solr index statistics. |
solrlatencysnapshots | - enable|disable | Toggle Solr latency snapshots. |
solrrequesthandlerstats | - enable|disable | Toggle Solr request handler statistics. |
solrslowlog | - enable|disable | Toggle Solr slow sub-query log. See Collecting slow Solr queries. |
solrupdatehandlerstats | - enable|disable | Toggle Solr update handler statistics. |
userlatencytracking | - enable|disable | Toggle user latency tracking. See Collecting user activity diagnostics. |
Using dsetool with Kerberos
- Using the ~/.dserc fileCreate or edit the ~/.dserc file in your DataStax Enterprise home directory and add the following entries:
sasl_protocol=service_name login_config=path_to_login_config
- Command line optionsSpecify the service name and JAAS configuration file on the command line:
where:-Ddse.sasl.protocol=service_name -Djava.security.auth.login.config=path_to_login_config
-
- service_name is the service name component of the
service_principal
that is defined in the dse.yaml file - path_to_login_config is the JAAS configuration file with the
following options declared in
it:
DseClient { com.sun.security.auth.module.Krb5LoginModule required useTicketCache=true renewTGT=true; };
- service_name is the service name component of the
-