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Posted to commits@trafodion.apache.org by li...@apache.org on 2017/03/23 05:15:27 UTC
[3/4] incubator-trafodion git commit: incorporate comments for
scratch dirs CQD 2
incorporate comments for scratch dirs CQD 2
Project: http://git-wip-us.apache.org/repos/asf/incubator-trafodion/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-trafodion/commit/b5174665
Tree: http://git-wip-us.apache.org/repos/asf/incubator-trafodion/tree/b5174665
Diff: http://git-wip-us.apache.org/repos/asf/incubator-trafodion/diff/b5174665
Branch: refs/heads/master
Commit: b517466597a2d603a12d5ef8d4a4444562ca2def
Parents: 71f581f
Author: liu.yu <yu...@esgyn.cn>
Authored: Thu Mar 23 12:02:04 2017 +0800
Committer: liu.yu <yu...@esgyn.cn>
Committed: Thu Mar 23 12:02:04 2017 +0800
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.../src/asciidoc/_chapters/query_execution.adoc | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
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http://git-wip-us.apache.org/repos/asf/incubator-trafodion/blob/b5174665/docs/cqd_reference/src/asciidoc/_chapters/query_execution.adoc
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diff --git a/docs/cqd_reference/src/asciidoc/_chapters/query_execution.adoc b/docs/cqd_reference/src/asciidoc/_chapters/query_execution.adoc
index 1f60546..5e41c99 100644
--- a/docs/cqd_reference/src/asciidoc/_chapters/query_execution.adoc
+++ b/docs/cqd_reference/src/asciidoc/_chapters/query_execution.adoc
@@ -243,7 +243,7 @@ If you enable small scanner on large size scan incorrectly, then you are likely
[cols="25%h,75%"]
|===
-| *Description* | Allows a CQD specification to override the envvar settings for scatch and temporary file locations, which gives user more flexibility to change scratch directory locations.
+| *Description* | Allows a CQD specification to override the environment variable settings for scatch and temporary file locations, which gives the user more flexibility to change scratch directory locations.
| *Values* |
Scratch disk locations for overflow (linux path names).
@@ -256,16 +256,16 @@ Multiple locations can be specified, separated by a colon. For example, /tmp/scr
* Specify this location at installation time.
+
-Currently the scratch directory locations are set at installation time. The layer of scratch and temporary file system that manages the scratch file creation and reads the envvar in $TRAF_HOME/etc/ms.env to determine where to create the scratch files.
+Currently the scratch directory locations are set at installation time. The code that manages scratch and temporary files reads environment variables in $TRAF_HOME/etc/ms.env to determine where to create scratch files.
+
-The CQD will override envvar settings, there are two envvar settings: one is STFS_HDD_LOACTION (default), the other is STFS_SSD_LOCATION (SSD disk).
+The CQD overrides the STFS_HDD_LOCATION (disk) and STFS_SSD_LOCATION (SSD disk) environment variables.
+
-If the CQD is not set (empty), the envvar setting will work.
+If the CQD is not set, the environment variable settings will be used.
+
-The requirement is that the directories MUST exist on every node and Trafodion user will need permission to write to those directories. If not, an error will be returned when a query involving sort/hash overflow is executed.
+The directories MUST exist on every node and the Trafodion user must have permission to write to those directories. If not, an error will be returned when a query involving sort/hash overflow is executed.
* Set it in sqconfig.
@@ -274,13 +274,13 @@ The requirement is that the directories MUST exist on every node and Trafodion u
* If the scratch directory location is not set at installation time, this CQD is valid only for the duration of the session.
+
-These settings will not be stored in $TRAF_HOME/etc/ms.env and will override the envvar settings as long as the CQD is in effect.
+These settings will not be stored in $TRAF_HOME/etc/ms.env and will override the environment variables settings as long as the CQD is in effect.
| *Production Usage* | Please contact {project-support}.
| *Impact* |
More volume of data can be processed. For example, large data set.
-Larger disk space can process larger data set.
+More disk space can process larger data sets.
| *Level* | System.
| *Conflicts/Synergies* | Not applicable.