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Arrange for the postmaster (and standalone backends, initdb, etc) to

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chdir into PGDATA and subsequently use relative paths instead of absolute
paths to access all files under PGDATA.  This seems to give a small
performance improvement, and it should make the system more robust
against naive DBAs doing things like moving a database directory that
has a live postmaster in it.  Per recent discussion.
This commit is contained in:
Tom Lane
2005-07-04 04:51:52 +00:00
parent 7504f0bae8
commit eb5949d190
27 changed files with 364 additions and 474 deletions
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12
src/backend/storage/smgr/md.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/smgr/md.c,v 1.116 2005/06/20 18:37:01 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/smgr/md.c,v 1.117 2005/07/04 04:51:49 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -155,7 +155,7 @@ mdcreate(SMgrRelation reln, bool isRedo)
path = relpath(reln->smgr_rnode);
fd = FileNameOpenFile(path, O_RDWR | O_CREAT | O_EXCL | PG_BINARY, 0600);
fd = PathNameOpenFile(path, O_RDWR | O_CREAT | O_EXCL | PG_BINARY, 0600);
if (fd < 0)
{
@@ -169,7 +169,7 @@ mdcreate(SMgrRelation reln, bool isRedo)
* mdopen)
*/
if (isRedo || IsBootstrapProcessingMode())
fd = FileNameOpenFile(path, O_RDWR | PG_BINARY, 0600);
fd = PathNameOpenFile(path, O_RDWR | PG_BINARY, 0600);
if (fd < 0)
{
pfree(path);
@@ -340,7 +340,7 @@ mdopen(SMgrRelation reln, bool allowNotFound)
path = relpath(reln->smgr_rnode);
fd = FileNameOpenFile(path, O_RDWR | PG_BINARY, 0600);
fd = PathNameOpenFile(path, O_RDWR | PG_BINARY, 0600);
if (fd < 0)
{
@@ -352,7 +352,7 @@ mdopen(SMgrRelation reln, bool allowNotFound)
* (See mdcreate)
*/
if (IsBootstrapProcessingMode())
fd = FileNameOpenFile(path, O_RDWR | O_CREAT | O_EXCL | PG_BINARY, 0600);
fd = PathNameOpenFile(path, O_RDWR | O_CREAT | O_EXCL | PG_BINARY, 0600);
if (fd < 0)
{
pfree(path);
@@ -879,7 +879,7 @@ _mdfd_openseg(SMgrRelation reln, BlockNumber segno, int oflags)
fullpath = path;
/* open the file */
fd = FileNameOpenFile(fullpath, O_RDWR | PG_BINARY | oflags, 0600);
fd = PathNameOpenFile(fullpath, O_RDWR | PG_BINARY | oflags, 0600);
pfree(fullpath);