Posted by
xm_zzc on
Oct 07, 2018; 4:20pm
URL: http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/Change-the-comment-content-for-column-when-execute-command-desc-formatted-table-name-tp46848p64709.html
Hi:
I agree with Jacky.
Currently if i use the default value of blocklet size (64mb) to create a
table and load some data into table, and then change the default value of
blocklet size to 128mb, it will affect the table created before, is it
right? I think it still need to use 64mb as blocklet size for tables created
before.
These properties either specified by user or from default value need to be
saved when create table:
file level properties:
|Blocklet Size |64 MB |64 MB |
table level properties:
|Table Block Size |1024 MB |1024 MB |
|SORT_SCOPE |LOCAL_SORT |LOCAL_SORT |
|CACHE_LEVEL |BLOCKLET |BLOCK |
|AUTO_LOAD_MERGE |true |false |
|COMPACTION_LEVEL_THRESHOLD |2,8 |4,3 |
|COMPACTION_PRESERVE_SEGMENTS |0 |0 |
|ALLOWED_COMPACTION_DAYS |0 |0 |
|MAJOR_COMPACTION_SIZE |3072 MB |1024 MB |
|Local Dictionary Enabled |false |false |
|Local Dictionary Threshold |10000 |10000 |
Hi Jacky:
I think we need to refactor CarbonCli module and move some common tools to
core module, and then CarbonCli module and Spark2 module can use them,
right?
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