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https://issues.apache.org/jira/browse/TAJO-1340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14733364#comment-14733364
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ASF GitHub Bot commented on TAJO-1340:
--------------------------------------
Github user jinossy commented on the pull request:
https://github.com/apache/tajo/pull/671#issuecomment-138226623
Change to pre-fetch both TajoMaster and TajoClient
Pre-Fetch, Network: Loopback, Data: lineitem 3GB
```
TEXT format
52 sec (Deserialize), 52 sec (Non-Deserialize)
TEXT format + snappy compression
54 sec (Deserialize), 54 sec (Non-Deserialize)
DRAW format
32 sec (Deserialize), 22 sec (Non-Deserialize)
DRAW format + snappy compression
47 sec (Deserialize), 47 sec (Non-Deserialize)
```
> Change the default output file format.
> --------------------------------------
>
> Key: TAJO-1340
> URL: https://issues.apache.org/jira/browse/TAJO-1340
> Project: Tajo
> Issue Type: Improvement
> Components: Java Client, JDBC Driver, Offheap, Storage
> Reporter: Hyunsik Choi
> Assignee: Jinho Kim
> Fix For: 0.11.0, 0.12.0
>
> Attachments: TAJO-1340.patch, TAJO-1340_2.patch
>
>
> Currently, the default output file is CSV. Due to its nature, CSV has mainly
> three problems:
> * Its line or field delimiter can be duplicated to some character included
> in the result data.
> * Plan text file is likely to be larger than other file formats.
> * Its read and write performance is slow.
> We need to change the default output file format into other file formats. We
> also need to investigate which file format is the best for it.
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