[GitHub] [iotdb] HTHou commented on pull request #6729: [IOTDB-2569] Support ZSTD Compression use airlift

[GitBox <gi...@apache.org>]

HTHou commented on PR #6729:
URL: https://github.com/apache/iotdb/pull/6729#issuecomment-1200848462

   > > SNAPPY
   > > ```
   > > 2022-07-28 18:26:02,294 [pool-6-IoTDB-Flush-1] INFO  o.a.i.d.e.f.MemTableFlushTask:95 - The memTable size of SG root.test-0 is 1124046000, the avg series points num in chunk is 2310, total timeseries number is 25000 
   > > 2022-07-28 18:26:04,285 [pool-6-IoTDB-Flush-1] INFO  o.a.i.d.e.f.MemTableFlushTask:177 - Storage group root.test-0 memtable PrimitiveMemTable{planIndex=[0,0]} flushing a memtable has finished! Time consumption: 1991ms 
   > > 2022-07-28 18:26:04,615 [pool-6-IoTDB-Flush-1] INFO  o.a.i.d.c.a.CompressionRatio:98 - Compression ratio is 58.469725192679576 
   > > 2022-07-28 18:26:04,733 [pool-6-IoTDB-Flush-1] INFO  o.a.i.d.e.s.TsFileProcessor:1424 - Storage group root.test-0 close the file /data2/data/sequence/root.test/0/0/1659003958469-33-0-0.tsfile, TsFile size is 20195302, time consumption of flushing metadata is 117ms 
   > > ```
   > > 
   > > 
   > >     
   > >       
   > >     
   > > 
   > >       
   > >     
   > > 
   > >     
   > >   
   > > ZSTD
   > > ```
   > > 2022-07-28 17:31:40,842 [pool-6-IoTDB-Flush-12] INFO  o.a.i.d.e.f.MemTableFlushTask:95 - The memTable size of SG root.test-0 is 1117233600, the avg series points num in chunk is 2296, total timeseries number is 25000 
   > > 2022-07-28 17:31:44,075 [pool-6-IoTDB-Flush-12] INFO  o.a.i.d.e.f.MemTableFlushTask:177 - Storage group root.test-0 memtable PrimitiveMemTable{planIndex=[0,0]} flushing a memtable has finished! Time consumption: 3232ms 
   > > 2022-07-28 17:31:44,438 [pool-6-IoTDB-Flush-12] INFO  o.a.i.d.c.a.CompressionRatio:98 - Compression ratio is 98.23160330411592 
   > > 2022-07-28 17:31:44,539 [pool-6-IoTDB-Flush-12] INFO  o.a.i.d.e.s.TsFileProcessor:1424 - Storage group root.test-0 close the file /data2/data/sequence/root.test/0/0/1659000697005-44-0-0.tsfile, TsFile size is 12651862, time consumption of flushing metadata is 101ms 
   > > ```
   > 
   > ok, thank you. Thanks for tell me what can I do next?
   
   Any idea about how to reduce the encoding time? The current version takes more time than SNAPPY.


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