Rename "pg_xlog" directory to "pg_wal".

"xlog" is not a particularly clear abbreviation for "write-ahead log",
and it sometimes confuses users into believe that the contents of the
"pg_xlog" directory are not critical data, leading to unpleasant
consequences.  So, rename the directory to "pg_wal".

This patch modifies pg_upgrade and pg_basebackup to understand both
the old and new directory layouts; the former is necessary given the
purpose of the tool, while the latter merely avoids an unnecessary
backward-compatibility break.

We may wish to consider renaming other programs, switches, and
functions which still use the old "xlog" naming to also refer to
"wal".  However, that's still under discussion, so let's do just this
much for now.

Discussion: CAB7nPqTeC-8+zux8_-4ZD46V7YPwooeFxgndfsq5Rg8ibLVm1A@mail.gmail.com

Michael Paquier

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bin/pg_xlogdump/pg_xlogdump.c b/src/bin/pg_xlogdump/pg_xlogdump.c
index 9ad9321e1f9..74903980ae5 100644
--- a/src/bin/pg_xlogdump/pg_xlogdump.c
+++ b/src/bin/pg_xlogdump/pg_xlogdump.c
@@ -680,7 +680,7 @@ usage(void)
 	printf("  -f, --follow           keep retrying after reaching end of WAL\n");
 	printf("  -n, --limit=N          number of records to display\n");
 	printf("  -p, --path=PATH        directory in which to find log segment files\n");
-	printf("                         (default: ./pg_xlog)\n");
+	printf("                         (default: ./pg_wal)\n");
 	printf("  -r, --rmgr=RMGR        only show records generated by resource manager RMGR\n");
 	printf("                         use --rmgr=list to list valid resource manager names\n");
 	printf("  -s, --start=RECPTR     start reading at log position RECPTR\n");