structured compute basics (#714)

this change adds the `zencompute` component, which can be used to distribute work dispatched from UE using the DDB (Derived Data Build) APIs via zenserver

this change also adds a distinct zenserver compute mode (`zenserver compute`) which is intended to be used for leaf compute nodes

to exercise the compute functionality without directly involving UE, a `zen exec` subcommand is also added, which can be used to feed replays through the system

all new functionality is considered *experimental* and disabled by default at this time, behind the `zencompute` option in xmake config

1 files changed, 23 insertions, 16 deletions

diff --git a/src/zen/zen.cpp b/src/zen/zen.cpp
index 25245c3d2..018f77738 100644
--- a/src/zen/zen.cpp
+++ b/src/zen/zen.cpp
@@ -11,6 +11,7 @@
 #include "cmds/cache_cmd.h"
 #include "cmds/copy_cmd.h"
 #include "cmds/dedup_cmd.h"
+#include "cmds/exec_cmd.h"
 #include "cmds/info_cmd.h"
 #include "cmds/print_cmd.h"
 #include "cmds/projectstore_cmd.h"
@@ -316,22 +317,25 @@ main(int argc, char** argv)
 	}
 #endif	// ZEN_WITH_TRACE
 
-	AttachCommand			 AttachCmd;
-	BenchCommand			 BenchCmd;
-	BuildsCommand			 BuildsCmd;
-	CacheDetailsCommand		 CacheDetailsCmd;
-	CacheGetCommand			 CacheGetCmd;
-	CacheGenerateCommand	 CacheGenerateCmd;
-	CacheInfoCommand		 CacheInfoCmd;
-	CacheStatsCommand		 CacheStatsCmd;
-	CopyCommand				 CopyCmd;
-	CopyStateCommand		 CopyStateCmd;
-	CreateOplogCommand		 CreateOplogCmd;
-	CreateProjectCommand	 CreateProjectCmd;
-	DedupCommand			 DedupCmd;
-	DownCommand				 DownCmd;
-	DropCommand				 DropCmd;
-	DropProjectCommand		 ProjectDropCmd;
+	AttachCommand		 AttachCmd;
+	BenchCommand		 BenchCmd;
+	BuildsCommand		 BuildsCmd;
+	CacheDetailsCommand	 CacheDetailsCmd;
+	CacheGetCommand		 CacheGetCmd;
+	CacheGenerateCommand CacheGenerateCmd;
+	CacheInfoCommand	 CacheInfoCmd;
+	CacheStatsCommand	 CacheStatsCmd;
+	CopyCommand			 CopyCmd;
+	CopyStateCommand	 CopyStateCmd;
+	CreateOplogCommand	 CreateOplogCmd;
+	CreateProjectCommand CreateProjectCmd;
+	DedupCommand		 DedupCmd;
+	DownCommand			 DownCmd;
+	DropCommand			 DropCmd;
+	DropProjectCommand	 ProjectDropCmd;
+#if ZEN_WITH_COMPUTE_SERVICES
+	ExecCommand ExecCmd;
+#endif	// ZEN_WITH_COMPUTE_SERVICES
 	ExportOplogCommand		 ExportOplogCmd;
 	FlushCommand			 FlushCmd;
 	GcCommand				 GcCmd;
@@ -388,6 +392,9 @@ main(int argc, char** argv)
 		{"dedup",								&DedupCmd,					"Dedup files"},
 		{"down",								&DownCmd,					"Bring zen server down"},
 		{"drop",								&DropCmd,					"Drop cache namespace or bucket"},
+#if ZEN_WITH_COMPUTE_SERVICES
+		{ExecCommand::Name,						&ExecCmd,					ExecCommand::Description},
+#endif
 		{"gc-status",							&GcStatusCmd,				"Garbage collect zen storage status check"},
 		{"gc-stop",								&GcStopCmd,					"Request cancel of running garbage collection in zen storage"},
 		{"gc",									&GcCmd,						"Garbage collect zen storage"},