const TTL_PROC_LONG = 30; // loose cache time that can survive slow web requests
const TTL_INDEFINITE = 0;
+
+ // Attribute and QoS constants; higher QOS values with the same prefix rank higher...
+ // Medium attributes constants related to emulation or media type
+ const ATTR_EMULATION = 1;
+ const QOS_EMULATION_SQL = 1;
+ // Medium attributes constants related to replica consistency
+ const ATTR_SYNCWRITES = 2; // SYNC_WRITES flag support
+ const QOS_SYNCWRITES_NONE = 1; // replication only supports eventual consistency or less
+ const QOS_SYNCWRITES_BE = 2; // best effort synchronous with limited retries
+ const QOS_SYNCWRITES_QC = 3; // write quorum applied directly to state machines where R+W > N
+ const QOS_SYNCWRITES_SS = 4; // strict-serializable, nodes refuse reads if possible stale
+ // Generic "unknown" value that is useful for comparisons (e.g. always good enough)
+ const QOS_UNKNOWN = INF;
}