thus reduced IO load when creating a table.
Uncompressed abbreviated segment and dicts aren't affected by
this b/c CS'es system catalog uses uncompressed dict files. CS
now doesn't work with empty dicts files.
for extent extention.
Added a getter, moved some methods from protected into public to use
with unit tests, e.g createFile, setPreallocSpace. Added code stub in
FileOp::oid2FileName to use with UT.
Add more comments.
Changed return value for HDFS'es fallocate.
Removed unnecessary code in ColumnBufferCompressed::writeToFile
Replaced Nulls with Empties in variable names.
For some reason version buffer is not turned up for update queries which
means that the version number for dictionary blocks is not changed.
This can lead to dirty cache reads resulting in _CpNoTf_ in the results.
This patch turns on version buffer for updates.
Squashed commit of the following:
commit faaee9141a
Author: Patrick LeBlanc <patrick.leblanc@mariadb.com>
Date: Wed Oct 3 13:03:02 2018 -0500
Commented a debugging printout.
commit e47e784c53
Author: Patrick LeBlanc <patrick.leblanc@mariadb.com>
Date: Wed Oct 3 12:13:23 2018 -0500
Moved the SKIP_OAM_INIT check for cleanliness, added 'config.h' to
other places that need it.
commit 6626045535
Author: Patrick LeBlanc <patrick.leblanc@mariadb.com>
Date: Tue Oct 2 16:33:06 2018 -0500
WIP. First cut of excising OAM and root access from the dev process.
This passes most tests; need to make sure that the tests that fail
have nothing to do with this change.
DMLProc is doing something that results in a sudo password prompt.
Will obliterate that next.
This adds options which are user enabled to debug the LRU cache inside
ColumnStore. Specifically cache flushing.
It adds the following:
* PrimProc flush information when SIGUSR2 mode is enabled
* cpimport dictionary flush information when -d2 is used
* WriteEngineServer DML flush information to STDERR
