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-rw-r--r--database/engine/rrdenginelib.c119
1 files changed, 106 insertions, 13 deletions
diff --git a/database/engine/rrdenginelib.c b/database/engine/rrdenginelib.c
index 0606dd938..287b86be8 100644
--- a/database/engine/rrdenginelib.c
+++ b/database/engine/rrdenginelib.c
@@ -60,7 +60,7 @@ int check_file_properties(uv_file file, uint64_t *file_size, size_t min_size)
if (ret < 0) {
fatal("uv_fs_fstat: %s\n", uv_strerror(ret));
}
- assert(req.result == 0);
+ fatal_assert(req.result == 0);
s = req.ptr;
if (!(s->st_mode & S_IFREG)) {
error("Not a regular file.\n");
@@ -78,17 +78,22 @@ int check_file_properties(uv_file file, uint64_t *file_size, size_t min_size)
return 0;
}
-/*
- * Tries to open a file in direct I/O mode, falls back to buffered mode if not possible.
- * Returns UV error number that is < 0 on failure.
- * On success sets (*file) to be the uv_file that was opened.
+/**
+ * Open file for I/O.
+ *
+ * @param path The full path of the file.
+ * @param flags Same flags as the open() system call uses.
+ * @param file On success sets (*file) to be the uv_file that was opened.
+ * @param direct Tries to open a file in direct I/O mode when direct=1, falls back to buffered mode if not possible.
+ * @return Returns UV error number that is < 0 on failure. 0 on success.
*/
-int open_file_direct_io(char *path, int flags, uv_file *file)
+int open_file_for_io(char *path, int flags, uv_file *file, int direct)
{
uv_fs_t req;
- int fd, current_flags, direct;
+ int fd = -1, current_flags;
- for (direct = 1 ; direct >= 0 ; --direct) {
+ fatal_assert(0 == direct || 1 == direct);
+ for ( ; direct >= 0 ; --direct) {
#ifdef __APPLE__
/* Apple OS does not support O_DIRECT */
direct = 0;
@@ -106,7 +111,7 @@ int open_file_direct_io(char *path, int flags, uv_file *file)
--direct; /* break the loop */
}
} else {
- assert(req.result >= 0);
+ fatal_assert(req.result >= 0);
*file = req.result;
#ifdef __APPLE__
info("Disabling OS X caching for file \"%s\".", path);
@@ -159,8 +164,10 @@ char *get_rrdeng_statistics(struct rrdengine_instance *ctx, char *str, size_t si
"global_io_errors: %ld\n"
"global_fs_errors: %ld\n"
"rrdeng_reserved_file_descriptors: %ld\n"
- "flushing_errors: %ld\n"
- "global_flushing_errors: %ld\n",
+ "pg_cache_over_half_dirty_events: %ld\n"
+ "global_pg_cache_over_half_dirty_events: %ld\n"
+ "flushing_pressure_page_deletions: %ld\n"
+ "global_flushing_pressure_page_deletions: %ld\n",
(long)ctx->stats.metric_API_producers,
(long)ctx->stats.metric_API_consumers,
(long)pg_cache->page_descriptors,
@@ -194,8 +201,94 @@ char *get_rrdeng_statistics(struct rrdengine_instance *ctx, char *str, size_t si
(long)global_io_errors,
(long)global_fs_errors,
(long)rrdeng_reserved_file_descriptors,
- (long)ctx->stats.flushing_errors,
- (long)global_flushing_errors
+ (long)ctx->stats.pg_cache_over_half_dirty_events,
+ (long)global_pg_cache_over_half_dirty_events,
+ (long)ctx->stats.flushing_pressure_page_deletions,
+ (long)global_flushing_pressure_page_deletions
);
return str;
}
+
+int is_legacy_child(const char *machine_guid)
+{
+ uuid_t uuid;
+ char dbengine_file[FILENAME_MAX+1];
+
+ if (unlikely(!strcmp(machine_guid, "unittest-dbengine") || !strcmp(machine_guid, "dbengine-dataset") ||
+ !strcmp(machine_guid, "dbengine-stress-test"))) {
+ return 1;
+ }
+ if (!uuid_parse(machine_guid, uuid)) {
+ uv_fs_t stat_req;
+ snprintfz(dbengine_file, FILENAME_MAX, "%s/%s/dbengine", netdata_configured_cache_dir, machine_guid);
+ int rc = uv_fs_stat(NULL, &stat_req, dbengine_file, NULL);
+ if (likely(rc == 0 && ((stat_req.statbuf.st_mode & S_IFMT) == S_IFDIR))) {
+ //info("Found legacy engine folder \"%s\"", dbengine_file);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+int count_legacy_children(char *dbfiles_path)
+{
+ int ret;
+ uv_fs_t req;
+ uv_dirent_t dent;
+ int legacy_engines = 0;
+
+ ret = uv_fs_scandir(NULL, &req, dbfiles_path, 0, NULL);
+ if (ret < 0) {
+ uv_fs_req_cleanup(&req);
+ error("uv_fs_scandir(%s): %s", dbfiles_path, uv_strerror(ret));
+ return ret;
+ }
+
+ while(UV_EOF != uv_fs_scandir_next(&req, &dent)) {
+ if (dent.type == UV_DIRENT_DIR) {
+ if (is_legacy_child(dent.name))
+ legacy_engines++;
+ }
+ }
+ uv_fs_req_cleanup(&req);
+ return legacy_engines;
+}
+
+int compute_multidb_diskspace()
+{
+ char multidb_disk_space_file[FILENAME_MAX + 1];
+ FILE *fp;
+ int computed_multidb_disk_quota_mb = -1;
+
+ snprintfz(multidb_disk_space_file, FILENAME_MAX, "%s/dbengine_multihost_size", netdata_configured_varlib_dir);
+ fp = fopen(multidb_disk_space_file, "r");
+ if (likely(fp)) {
+ int rc = fscanf(fp, "%d", &computed_multidb_disk_quota_mb);
+ fclose(fp);
+ if (unlikely(rc != 1 || computed_multidb_disk_quota_mb < RRDENG_MIN_DISK_SPACE_MB)) {
+ errno = 0;
+ error("File '%s' contains invalid input, it will be rebuild", multidb_disk_space_file);
+ computed_multidb_disk_quota_mb = -1;
+ }
+ }
+
+ if (computed_multidb_disk_quota_mb == -1) {
+ int rc = count_legacy_children(netdata_configured_cache_dir);
+ if (likely(rc >= 0)) {
+ computed_multidb_disk_quota_mb = (rc + 1) * default_rrdeng_disk_quota_mb;
+ info("Found %d legacy dbengines, setting multidb diskspace to %dMB", rc, computed_multidb_disk_quota_mb);
+
+ fp = fopen(multidb_disk_space_file, "w");
+ if (likely(fp)) {
+ fprintf(fp, "%d", computed_multidb_disk_quota_mb);
+ info("Created file '%s' to store the computed value", multidb_disk_space_file);
+ fclose(fp);
+ } else
+ error("Failed to store the default multidb disk quota size on '%s'", multidb_disk_space_file);
+ }
+ else
+ computed_multidb_disk_quota_mb = default_rrdeng_disk_quota_mb;
+ }
+
+ return computed_multidb_disk_quota_mb;
+}