* [saidump]

    •       Saidump for DNX-SAI sonic-net/sonic-buildimage#13561

    Solution and modification:
    To use the redis-db SAVE option to save the snapshot of DB each time and recover later, instead of looping through each entry in the table and saving it.

    (1) Updated sonic-buildimage/build_debian.sh, to install Python library rdbtools into the host.
    (2) Updated sonic-buildimage/src/sonic-sairedis/saidump/saidump.cpp, add a new option -r, which updates the rdbtools's output-JSON files' format.
    (3) Add a new script file: files/scripts/saidump.sh, to do the below steps
      For each ASIC0, such as ASIC0,

      1. Save the Redis data.
      sudo sonic-db-cli -n asic$1 SAVE > /dev/null

      2. Move dump files to /var/run/redisX/
      docker exec database$1 sh -c "mv /var/lib/redis/dump.rdb /var/run/redis$1/"

      3. Run rdb command to convert the dump files into JSON files
      sudo python /usr/local/bin/rdb --command json  /var/run/redis$1/dump.rdb | sudo tee /var/run/redis$1/dump.json > /dev/null

      4. Run saidump -r to update the JSON files' format as same as the saidump before. Then we can get the saidump result in standard output.
      docker exec syncd$1 sh -c "saidump -r /var/run/redis$1/dump.json"

      5. clear
      sudo rm -f /var/run/redis$1/dump.rdb
      sudo rm -f /var/run/redis$1/dump.json

    (4) Update sonic-buildimage/src/sonic-utilities/scripts/generate_dump, replace saidump with saidump.sh

scripts/generate_dump

@@ -872,6 +872,27 @@ save_redis() {
 #  None
 ###############################################################################
 save_saidump() {
+    trap 'handle_error $? $LINENO' ERR
+    if [[ ( "$NUM_ASICS" == 1 ) ]] ; then
+        save_cmd "docker exec syncd saidump" "saidump"
+    else
+        for (( i=0; i<$NUM_ASICS; i++ ))
+        do
+            save_cmd "docker exec syncd$i saidump" "saidump$i"
+        done
+    fi
+}
+
+###############################################################################
+# SAI DUMP from syncd by Redis Save command
+# Globals:
+#  NUM_ASICS
+# Arguments:
+#  None
+# Returns:
+#  None
+###############################################################################
+save_saidump_by_save_cmd() {
     trap 'handle_error $? $LINENO' ERR
     if [[ ( "$NUM_ASICS" == 1 ) ]] ; then
         save_cmd "saidump.sh" "saidump"
@@ -1791,6 +1812,8 @@ main() {
 
     if [[ "$device_type" != "SpineRouter" ]]; then
         save_saidump
+    else
+        save_saidump_by_save_cmd
     fi
 
     if [ "$asic" = "barefoot" ]; then