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[expand - 1 more] - [DISCUSSION] Optimizing the writing of min max for a column - CarbonData - [mail # dev]
...Hi manish, after reviewing your PR, I do come across another idea ofimplementing this feature:I'd like to use an unique `FAKE` value to store the minmax for thosecolumns.While judging the fi...
   Author: xuchuanyin , 2018-09-18, 01:27
[CARBONDATA-2930] Support customize column compressor - CarbonData - [issue]
...Support customize compressor to compress the final store.User can create their own compressor and specify it during creating table or loading data....
http://issues.apache.org/jira/browse/CARBONDATA-2930    Author: xuchuanyin , 2018-09-17, 13:29
[CARBONDATA-2944] optimize compress/decompress related procedure - CarbonData - [issue]
...While implementing customize compressor, I found that carbon compressor deal with primitive object while compressing/decompressing which I think will cause efficiency because: 1. many compre...
http://issues.apache.org/jira/browse/CARBONDATA-2944    Author: xuchuanyin , 2018-09-17, 12:55
[DISCUSSION] Support Binary DataType - CarbonData - [mail # dev]
...What is the difference between string and binary datatype in your processing? Will you introduce special UDFs for the binary datatype?At last, since you will add a new datatype, the test cas...
   Author: xuchuanyin , 2018-09-16, 03:58
[CARBONDATA-2933] Fix errors in spelling - CarbonData - [issue]
http://issues.apache.org/jira/browse/CARBONDATA-2933    Author: xuchuanyin , 2018-09-14, 07:35
[Discussion] Support for Float and Byte data types - CarbonData - [mail # dev]
...The actual storage datatype for that column is stored in ColumnPage level.In previous implementation, columns with literal datatype 'float' and'double' shared the same storage datatype 'doub...
   Author: xuchuanyin , 2018-09-14, 01:35
CarbonWriterBuild issue - CarbonData - [mail # dev]
...Yeah, it actually belongs to 'Builder Pattern'. We should simplify thisbefore they are widely used.--Sent from: http://apache-carbondata-dev-mailing-list-archive.1130556.n5.nabble.com/...
   Author: xuchuanyin , 2018-09-13, 03:44
[expand - 3 more] - Support Zstd as Column Compressor - CarbonData - [mail # dev]
...Yeah. Zstd and Snappy knows the size of decompress size from the compresseddata, but LZ4 don't. I find a link to describe this:https://github.com/lz4/lz4-java/issues/26To work around with LZ...
   Author: xuchuanyin , 2018-09-13, 02:36
[CARBONDATA-2850] Support configurable column compressor for final store - CarbonData - [issue]
...ZSTD has a better compression ratio that snappy and the compress/decompress rate is acceptable compared with snappy.After we introduce zstd as the column compressor, the size of carbondata f...
http://issues.apache.org/jira/browse/CARBONDATA-2850    Author: xuchuanyin , 2018-09-12, 12:18
[CARBONDATA-2852] support zstd on legacy store - CarbonData - [issue]
...Currently carbondata reads the column compressor from system property. This will cause problems on legacy store if we have changed the compressor.It should read that information from metadat...
http://issues.apache.org/jira/browse/CARBONDATA-2852    Author: xuchuanyin , 2018-09-12, 12:01