diff --git a/db.go b/db.go
index 6b2ae5a..138ffaf 100644
--- a/db.go
+++ b/db.go
@@ -6,6 +6,8 @@ package main
 
 import (
 	"database/sql"
+	"fmt"
+	"strconv"
 	"time"
 
 	_ "github.com/mattn/go-sqlite3"
@@ -14,6 +16,10 @@ import (
 	"code.dumpstack.io/tools/out-of-tree/qemu"
 )
 
+const CURRENT_DATABASE_VERSION = 1
+
+const VERSION_FIELD = "db_version"
+
 type logEntry struct {
 	ID        int
 	Timestamp time.Time
@@ -46,12 +52,71 @@ func createLogTable(db *sql.DB) (err error) {
 		test_output	TEXT,
 		test_ok		BOOLEAN,
 
+		qemu_stdout	TEXT,
+		qemu_stderr	TEXT,
+
 		kernel_panic	BOOLEAN,
 		timeout_kill	BOOLEAN
 	)`)
 	return
 }
 
+func createMetadataTable(db *sql.DB) (err error) {
+	_, err = db.Exec(`
+	CREATE TABLE IF NOT EXISTS metadata (
+		id	INTEGER PRIMARY KEY,
+		key	TEXT,
+		value	TEXT
+	)`)
+	return
+}
+
+func metaChkValue(db *sql.DB, key string) (exist bool, err error) {
+	sql := "SELECT EXISTS(SELECT id FROM metadata WHERE key = $1)"
+	stmt, err := db.Prepare(sql)
+	if err != nil {
+		return
+	}
+	defer stmt.Close()
+
+	err = stmt.QueryRow(key).Scan(&exist)
+	return
+}
+
+func metaGetValue(db *sql.DB, key string) (value string, err error) {
+	stmt, err := db.Prepare("SELECT value FROM metadata " +
+		"WHERE key = $1")
+	if err != nil {
+		return
+	}
+	defer stmt.Close()
+
+	err = stmt.QueryRow(key).Scan(&value)
+	return
+}
+
+func metaSetValue(db *sql.DB, key, value string) (err error) {
+	stmt, err := db.Prepare("INSERT INTO metadata " +
+		"(key, value) VALUES ($1, $2)")
+	if err != nil {
+		return
+	}
+	defer stmt.Close()
+
+	_, err = stmt.Exec(key, value)
+	return
+}
+
+func getVersion(db *sql.DB) (version int, err error) {
+	s, err := metaGetValue(db, VERSION_FIELD)
+	if err != nil {
+		return
+	}
+
+	version, err = strconv.Atoi(s)
+	return
+}
+
 func addToLog(db *sql.DB, q *qemu.QemuSystem, ka config.Artifact,
 	ki config.KernelInfo, res *phasesResult) (err error) {
 
@@ -60,9 +125,10 @@ func addToLog(db *sql.DB, q *qemu.QemuSystem, ka config.Artifact,
 		"build_output, build_ok, " +
 		"run_output, run_ok, " +
 		"test_output, test_ok, " +
+		"qemu_stdout, qemu_stderr, " +
 		"kernel_panic, timeout_kill) " +
 		"VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, " +
-		"$10, $11, $12, $13);")
+		"$10, $11, $12, $13, $14, $15);")
 	if err != nil {
 		return
 	}
@@ -75,6 +141,7 @@ func addToLog(db *sql.DB, q *qemu.QemuSystem, ka config.Artifact,
 		res.Build.Output, res.Build.Ok,
 		res.Run.Output, res.Run.Ok,
 		res.Test.Output, res.Test.Ok,
+		q.Stdout, q.Stderr,
 		q.KernelPanic, q.KilledByTimeout,
 	)
 	if err != nil {
@@ -161,6 +228,7 @@ func getLogByID(db *sql.DB, id int) (le logEntry, err error) {
 		"distro_type, distro_release, kernel_release, " +
 		"build_ok, run_ok, test_ok, " +
 		"build_output, run_output, test_output, " +
+		"qemu_stdout, qemu_stderr, " +
 		"kernel_panic, timeout_kill " +
 		"FROM log WHERE id=$1")
 	if err != nil {
@@ -173,12 +241,18 @@ func getLogByID(db *sql.DB, id int) (le logEntry, err error) {
 		&le.DistroType, &le.DistroRelease, &le.KernelRelease,
 		&le.Build.Ok, &le.Run.Ok, &le.Test.Ok,
 		&le.Build.Output, &le.Run.Output, &le.Test.Output,
+		&le.Stdout, &le.Stderr,
 		&le.KernelPanic, &le.KilledByTimeout,
 	)
 	return
 }
 
 func createSchema(db *sql.DB) (err error) {
+	err = createMetadataTable(db)
+	if err != nil {
+		return
+	}
+
 	err = createLogTable(db)
 	if err != nil {
 		return
@@ -193,10 +267,30 @@ func openDatabase(path string) (db *sql.DB, err error) {
 		return
 	}
 
-	err = createSchema(db)
+	db.SetMaxOpenConns(1)
+
+	exists, _ := metaChkValue(db, VERSION_FIELD)
+	if !exists {
+		err = createSchema(db)
+		if err != nil {
+			return
+		}
+
+		err = metaSetValue(db, VERSION_FIELD,
+			strconv.Itoa(CURRENT_DATABASE_VERSION))
+		return
+	}
+
+	version, err := getVersion(db)
 	if err != nil {
 		return
 	}
 
+	if version != CURRENT_DATABASE_VERSION {
+		err = fmt.Errorf("Database is not supported (%d instead of %d)",
+			version, CURRENT_DATABASE_VERSION)
+		return
+	}
+
 	return
 }
diff --git a/log.go b/log.go
index 889e23f..3e5de44 100644
--- a/log.go
+++ b/log.go
@@ -129,5 +129,11 @@ func logDumpHandler(db *sql.DB, id int) (err error) {
 	fmt.Printf("Test output:\n%s\n", l.Test.Output)
 	fmt.Println()
 
+	fmt.Printf("Qemu stdout:\n%s\n", l.Stdout)
+	fmt.Println()
+
+	fmt.Printf("Qemu stderr:\n%s\n", l.Stderr)
+	fmt.Println()
+
 	return
 }