- Introduction
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- ADMIN CANCEL REPAIR
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- ALTER CLUSTER
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- SPARK LOAD
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- STREAM LOAD
- Data Type
- Auxiliary Commands
- Function Reference
- Date Functions
- convert_tz
- curdate
- current_timestamp
- curtime
- datediff
- date_add
- date_format
- date_sub
- date_trunc
- day
- dayname
- dayofmonth
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- dayofyear
- from_days
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- hour
- minute
- month
- monthname
- now
- second
- str_to_date
- timediff
- timestampadd
- timestampdiff
- to_date
- to_days
- unix_timestamp
- utc_timestamp
- weekofyear
- year
- Geographic Functions
- String Functions
- append_trailing_char_if_absent
- ascii
- char_length
- concat
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- ends_with
- find_in_set
- get_json_double
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- get_json_string
- group_concat
- instr
- lcase
- left
- length
- locate
- lower
- lpad
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- money_format
- null_or_empty
- regexp_extract
- regexp_replace
- repeat
- reverse
- right
- rpad
- split
- split_part
- starts_with
- strleft
- strright
- Aggregation Functions
- Bitmap Functions
- Array Functions
- cast function
- hash function
- Crytographic Functions
- Date Functions
- System Variables
- Error Code
- System Limit
- SQL Reference
- Administration
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- SQL
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- Benchmark
- Release Notes
ALTER CLUSTER
description
This statement is used to update the logical cluster. It requires administrator privileges.
Syntax:
ALTER CLUSTER cluster_name PROPERTIES ("key"="value", ...);- Scaling up and scaling down (Based on the current number of "be" existing in the cluster, it scales up when the number is large and scales down when the number is small.) It scales up through synchronous operation and scales down through asynchronous operation. The status of backend shows whether the scaling is completed.
PROERTIES ("instance_num" = "3")instance_num is the node number of logical clusters.
example
Scale down and reduce the number of "be" in logical cluster test_cluster from 3 to 2.
ALTER CLUSTER test_cluster PROPERTIES ("instance_num"="2");Scale up and increase the number of "be" in logical cluster test_cluster from 3 to 4.
ALTER CLUSTER test_cluster PROPERTIES ("instance_num"="4");
keyword
ALTER,CLUSTER
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