X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=bluesky%2Finit.c;h=fee9aade5310fdf1b7b287d71273fa53a10339ae;hb=966a43ffed492d387e0d75e56c3984d9001c15b1;hp=4b7ec9315470b8ef903982bd5ec12604cf4cef56;hpb=ccd8dcd110e04b43ae1d04a3b1ab058cc1761d8b;p=bluesky.git

diff --git a/bluesky/init.c b/bluesky/init.c
index 4b7ec93..fee9aad 100644
--- a/bluesky/init.c
+++ b/bluesky/init.c
@@ -13,11 +13,47 @@
 
 #include "bluesky-private.h"
 
+int bluesky_verbose = 0;
+
 BlueSkyOptions bluesky_options;
 
+/* Maximum number of threads to use in any particular thread pool, or -1 for no
+ * limit */
+int bluesky_max_threads = 16;
+
+/* Watermark levels for cache tuning: these control when dirty data is flushed
+ * from cache, when clean data is dropped from the cache, etc.  These values
+ * are measured in blocks, not bytes.
+ *
+ * There are a few relevant levels:
+ *   low: Below this point, data is not forced out due to memory pressure
+ *   medium: At this point start flushing data to get back below medium
+ *   high: Flush data very aggressively (launch extra tasks if needed)
+ */
+int bluesky_watermark_low_dirty    = (64 << 20) / BLUESKY_BLOCK_SIZE;
+int bluesky_watermark_medium_dirty = (96 << 20) / BLUESKY_BLOCK_SIZE;
+int bluesky_watermark_high_dirty   = (192 << 20) / BLUESKY_BLOCK_SIZE;
+
+int bluesky_watermark_low_total    = (64 << 20) / BLUESKY_BLOCK_SIZE;
+int bluesky_watermark_medium_total = (128 << 20) / BLUESKY_BLOCK_SIZE;
+int bluesky_watermark_high_total   = (256 << 20) / BLUESKY_BLOCK_SIZE;
+
+/* Environment variables that can be used to initialize settings. */
+static struct {
+    const char *env;
+    int *option;
+} option_table[] = {
+    {"BLUESKY_OPT_SYNC_STORES", &bluesky_options.synchronous_stores},
+    {"BLUESKY_OPT_WRITETHROUGH", &bluesky_options.writethrough_cache},
+    {"BLUESKY_OPT_SYNC_INODE_FETCH", &bluesky_options.sync_inode_fetches},
+    {"BLUESKY_OPT_SYNC_FRONTENDS", &bluesky_options.sync_frontends},
+    {NULL, NULL}
+};
+
 /* BlueSky library initialization. */
 
 void bluesky_store_init_s3(void);
+void bluesky_store_init_kv(void);
 
 /* Initialize the BlueSky library and dependent libraries. */
 void bluesky_init(void)
@@ -25,8 +61,16 @@ void bluesky_init(void)
     g_thread_init(NULL);
     bluesky_crypt_init();
 
-    //bluesky_options.synchronous_stores = 1;
+    for (int i = 0; option_table[i].env != NULL; i++) {
+        const char *val = getenv(option_table[i].env);
+        if (val != NULL) {
+            int v = atoi(val);
+            g_print("Option %s set to %d\n", option_table[i].env, v);
+            *option_table[i].option = atoi(val);
+        }
+    }
 
     bluesky_store_init();
+    bluesky_store_init_kv();
     bluesky_store_init_s3();
 }