Changeset: 347320055651 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/347320055651
Modified Files:
gdk/gdk_bbp.c
Branch: Jul2021
Log Message:
Cleanup bat directory after renaming string offset heaps; improve said renaming.
diffs (136 lines):
diff --git a/gdk/gdk_bbp.c b/gdk/gdk_bbp.c
--- a/gdk/gdk_bbp.c
+++ b/gdk/gdk_bbp.c
@@ -1027,16 +1027,40 @@ movestrbats(void)
/* not a valid BAT */
continue;
}
- if (b->ttype != TYPE_str || b->twidth == SIZEOF_VAR_T)
+ if (b->ttype != TYPE_str || b->twidth == SIZEOF_VAR_T ||
b->batCount == 0)
continue;
char *oldpath = GDKfilepath(0, BATDIR,
BBP_physical(b->batCacheid), "tail");
char *newpath = GDKfilepath(0, BATDIR, b->theap->filename,
NULL);
int ret = -1;
- if (oldpath != NULL && newpath != NULL)
- ret = MT_rename(oldpath, newpath);
+ if (oldpath != NULL && newpath != NULL) {
+ struct stat oldst, newst;
+ bool oldexist = MT_stat(oldpath, &oldst) == 0;
+ bool newexist = MT_stat(newpath, &newst) == 0;
+ if (newexist) {
+ if (oldexist) {
+ if (oldst.st_mtime > newst.st_mtime) {
+ GDKerror("both %s and %s exist
with %s unexpectedly newer: manual intervention required\n", oldpath, newpath,
oldpath);
+ ret = -1;
+ } else {
+ TRC_WARNING(GDK, "both %s and
%s exist, removing %s\n", oldpath, newpath, oldpath);
+ ret = MT_remove(oldpath);
+ }
+ } else {
+ /* already good */
+ ret = 0;
+ }
+ } else if (oldexist) {
+ TRC_DEBUG(IO_, "rename %s to %s\n", oldpath,
newpath);
+ ret = MT_rename(oldpath, newpath);
+ } else {
+ /* neither file exists: may be ok, but
+ * will be checked later */
+ ret = 0;
+ }
+ }
GDKfree(oldpath);
GDKfree(newpath);
- if (ret < 0)
+ if (ret == -1)
return GDK_FAIL;
}
return GDK_SUCCEED;
@@ -1257,6 +1281,62 @@ BBPinit(void)
if (BBPcheckbats(bbpversion) != GDK_SUCCEED)
return GDK_FAIL;
+#ifdef GDKLIBRARY_TAILN
+ char *needstrbatmove;
+ needstrbatmove = GDKfilepath(0, BATDIR, "needstrbatmove", NULL);
+ if (bbpversion <= GDKLIBRARY_TAILN) {
+ /* create signal file that we need to rename string
+ * offset heaps */
+ int fd = MT_open(needstrbatmove, O_WRONLY | O_CREAT);
+ if (fd < 0) {
+ TRC_CRITICAL(GDK, "cannot create signal file
needstrbatmove.\n");
+ GDKfree(needstrbatmove);
+ return GDK_FAIL;
+ }
+ close(fd);
+ } else {
+ /* check signal file whether we need to rename string
+ * offset heaps */
+ int fd = MT_open(needstrbatmove, O_RDONLY);
+ if (fd >= 0) {
+ /* yes, we do */
+ close(fd);
+ } else if (errno == ENOENT) {
+ /* no, we don't: set var to NULL */
+ GDKfree(needstrbatmove);
+ needstrbatmove = NULL;
+ } else {
+ GDKsyserror("unexpected error opening %s\n",
needstrbatmove);
+ GDKfree(needstrbatmove);
+ return GDK_FAIL;
+ }
+ }
+#endif
+
+ if (bbpversion < GDKLIBRARY && TMcommit() != GDK_SUCCEED) {
+ TRC_CRITICAL(GDK, "TMcommit failed\n");
+ return GDK_FAIL;
+ }
+
+#ifdef GDKLIBRARY_TAILN
+ /* we rename the offset heaps after the above commit: in this
+ * version we accept both the old and new names, but we want to
+ * convert so that future versions only have the new name */
+ if (needstrbatmove) {
+ /* note, if renaming fails, nothing is lost: a next
+ * invocation will just try again; an older version of
+ * mserver will not work because of the TMcommit
+ * above */
+ if (movestrbats() != GDK_SUCCEED) {
+ GDKfree(needstrbatmove);
+ return GDK_FAIL;
+ }
+ MT_remove(needstrbatmove);
+ GDKfree(needstrbatmove);
+ needstrbatmove = NULL;
+ }
+#endif
+
/* cleanup any leftovers (must be done after BBPrecover) */
for (i = 0; i < MAXFARMS && BBPfarms[i].dirname != NULL; i++) {
int j;
@@ -1277,24 +1357,6 @@ BBPinit(void)
}
}
- if (bbpversion < GDKLIBRARY && TMcommit() != GDK_SUCCEED) {
- TRC_CRITICAL(GDK, "TMcommit failed\n");
- return GDK_FAIL;
- }
-#ifdef GDKLIBRARY_TAILN
- /* we rename the offset heaps after the above commit: in this
- * version we accept both the old and new names, but we want to
- * convert so that future versions only have the new name */
- if (bbpversion <= GDKLIBRARY_TAILN) {
- /* note, if renaming fails, nothing is lost: a next
- * invocation will just try again; an older version of
- * mserver will not work because of the TMcommit
- * above */
- if (movestrbats() != GDK_SUCCEED)
- return GDK_FAIL;
- }
-#endif
-
manager = THRcreate(BBPmanager, NULL, MT_THR_DETACHED, "BBPmanager");
return GDK_SUCCEED;
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