initdb: Add --no-sync-data-files. This new option instructs initdb to skip synchronizing any files in database directories, the database directories themselves, and the tablespace directories, i.e., everything in the base/ subdirectory and any other tablespace directories. Other files, such as those in pg_wal/ and pg_xact/, will still be synchronized unless --no-sync is also specified. --no-sync-data-files is primarily intended for internal use by tools that separately ensure the skipped files are synchronized to disk. A follow-up commit will use this to help optimize pg_upgrade's file transfer step.
The --sync-method=fsync implementation of this option makes use of a new exclude_dir parameter for walkdir(). When not NULL, exclude_dir specifies a directory to skip processing. The --sync-method=syncfs implementation of this option just skips synchronizing the non-default tablespace directories. This means that initdb will still synchronize some or all of the database files, but there's not much we can do about that. Discussion: https://postgr.es/m/Zyvop-LxLXBLrZil%40nathan Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/cf131fa942855acd42e8283185837566c7e8c15e Modified Files -------------- doc/src/sgml/ref/initdb.sgml | 27 +++++++++ src/bin/initdb/initdb.c | 10 +++- src/bin/initdb/t/001_initdb.pl | 1 + src/bin/pg_basebackup/pg_basebackup.c | 2 +- src/bin/pg_checksums/pg_checksums.c | 2 +- src/bin/pg_combinebackup/pg_combinebackup.c | 2 +- src/bin/pg_rewind/file_ops.c | 2 +- src/common/file_utils.c | 85 +++++++++++++++++++---------- src/include/common/file_utils.h | 2 +- 9 files changed, 96 insertions(+), 37 deletions(-)
