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ASF GitHub Bot commented on TRAFODION-647: ------------------------------------------ GitHub user CoderSong2015 opened a pull request: https://github.com/apache/incubator-trafodion/pull/1198 [TRAFODION-647]Make threshold of compression configurable In Windows,you need to modify the registry to set the compression threshold. In Linux,you need to set the threshold by DSN file like: [Default_DataSource] ... Compression = balance CompressionThreshold = 3000 ... You also can config it by connection string like: "DSN=Default_DataSource;USER=XX;PWD=XXX;CompressionThreshold=3000" You can merge this pull request into a Git repository by running: $ git pull https://github.com/CoderSong2015/incubator-trafodion master Alternatively you can review and apply these changes as the patch at: https://github.com/apache/incubator-trafodion/pull/1198.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #1198 ---- commit a731155a95df05b41ad780a8254a60faada79027 Author: CoderSong2015 <403438...@qq.com> Date: 2017-08-04T03:36:14Z Make threshold of compression configurable in linux commit c181c842beb1c8c9617c1c5db507d672eff0ea46 Author: CoderSong2015 <403438...@qq.com> Date: 2017-08-04T03:48:18Z Make threshold of compression configurable in windows ---- > LP Bug: 1371452 - allow user to set starting compress threshold value in odbc > driver > ------------------------------------------------------------------------------------ > > Key: TRAFODION-647 > URL: https://issues.apache.org/jira/browse/TRAFODION-647 > Project: Apache Trafodion > Issue Type: Bug > Components: client-odbc-linux, client-odbc-windows, > connectivity-dcs, connectivity-mxosrvr > Reporter: Daniel Lu > Assignee: Daniel Lu > > Currently, driver compression is turned on by the DSN setting > "Compression=?", but still, if the sending buffer size is too small, we do > not compress it. because in this case the time would be taken by > compress+extract code, very possible longer than actually transmit time of > the small buffer. so we have a hard code threshold value for this in driver > and server. but we know what is the best value for this depend on actual H/W > and network delay. so hard code is not a good option. we need to externalize > it to outside user. for driver, we can put it in DSN setting, but for server > side, a new property is required for DCS server, we need consider about it. -- This message was sent by Atlassian JIRA (v6.4.14#64029)