diff --git a/eden/mononoke/cmds/packer/main.rs b/eden/mononoke/cmds/packer/main.rs
index 9f36ea4f6f4d1..b435e39985abf 100644
--- a/eden/mononoke/cmds/packer/main.rs
+++ b/eden/mononoke/cmds/packer/main.rs
@@ -11,6 +11,7 @@ use std::io;
 use std::io::prelude::*;
 use std::io::BufReader;
 use std::path::Path;
+use std::path::PathBuf;
 use std::time::Instant;
 
 use anyhow::bail;
@@ -64,14 +65,13 @@ struct MononokePackerArgs {
     #[clap(long, help = "If true, print the progress of the packing")]
     print_progress: bool,
 
-    /// The scuba table that contains the tuning debug information,
-    /// for example, the time used for finding the best packing strategy
-    #[clap(
-        long,
-        default_value_t = String::from("file:///tmp/packer_tuning_log.json"),
-        help = "The scuba table that contains the tuning debug information"
-    )]
-    tuning_info_scuba_table: String,
+    /// Scuba table to log tuning information to
+    #[clap(long, alias = "tuning-info-scuba-dataset")]
+    tuning_info_scuba_table: Option<String>,
+
+    /// File to log tuning information to
+    #[clap(long)]
+    tuning_info_scuba_log_file: Option<PathBuf>,
 }
 
 const PACK_PREFIX: &str = "multiblob-";
@@ -145,7 +145,6 @@ fn main(fb: FacebookInit) -> Result<()> {
     let max_parallelism = args.scheduled_max;
     let keys_dir = args.keys_dir;
     let print_progress = args.print_progress;
-    let tuning_info_scuba_table = args.tuning_info_scuba_table;
 
     let env = app.environment();
     let logger = app.logger();
@@ -161,8 +160,14 @@ fn main(fb: FacebookInit) -> Result<()> {
         .collect::<Result<Vec<_>, io::Error>>()?;
     keys_file_entries.shuffle(&mut thread_rng());
 
-    // prepare the tuning info scuba table
-    let tuning_info_scuba_builder = MononokeScubaSampleBuilder::new(fb, &tuning_info_scuba_table)?;
+    let mut tuning_info_scuba_builder = match args.tuning_info_scuba_table {
+        Some(table) => MononokeScubaSampleBuilder::new(fb, &table)?,
+        None => MononokeScubaSampleBuilder::with_discard(),
+    };
+
+    if let Some(file) = args.tuning_info_scuba_log_file {
+        tuning_info_scuba_builder = tuning_info_scuba_builder.with_log_file(file)?;
+    }
 
     let total_file_count = keys_file_entries.len();
     for (cur, entry) in keys_file_entries.iter().enumerate() {
diff --git a/eden/mononoke/tests/integration/test-packer-tuning-debug-info.t b/eden/mononoke/tests/integration/test-packer-tuning-debug-info.t
index 7437dd9996ebe..1bd06d2cf1453 100644
--- a/eden/mononoke/tests/integration/test-packer-tuning-debug-info.t
+++ b/eden/mononoke/tests/integration/test-packer-tuning-debug-info.t
@@ -47,7 +47,7 @@
   $ echo 'repo0000.content.blake2.7f4c8284eea7351488400d6fdf82e1c262a81e20d4abd8ee469841d19b60c94a' >> $TESTTMP/pack_key_files4/reporepo.store0.part0.keys.txt
 
 # Pack content into a pack
-  $ packer --zstd-level 19 --scuba-log-file packed.json --keys-dir $TESTTMP/pack_key_files4/ --print-progress --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json" 2>&1 | strip_glog
+  $ packer --zstd-level 19 --scuba-log-file packed.json --keys-dir $TESTTMP/pack_key_files4/ --print-progress --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json" 2>&1 | strip_glog
   File *reporepo.store0.part0.keys.txt, which has 3 lines (glob)
   Progress: 100.000%	processing took * (glob)
 
diff --git a/eden/mononoke/tests/integration/test-packer.t b/eden/mononoke/tests/integration/test-packer.t
index a7a8dc1c65ac3..cc961c80ca9ad 100644
--- a/eden/mononoke/tests/integration/test-packer.t
+++ b/eden/mononoke/tests/integration/test-packer.t
@@ -49,9 +49,9 @@
   $ echo 'repo0000.content.blake2.7f4c8284eea7351488400d6fdf82e1c262a81e20d4abd8ee469841d19b60c94a' >> $TESTTMP/pack_key_files3/reporepo.store0.part0.keys.txt
 
 # Pack content individually, to show recompression effect
-  $ packer --zstd-level 10 --scuba-log-file pack-individually.json --keys-dir $TESTTMP/pack_key_files1/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
-  $ packer --zstd-level 10 --scuba-log-file pack-individually.json --keys-dir $TESTTMP/pack_key_files2/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
-  $ packer --zstd-level 10 --scuba-log-file pack-individually.json --keys-dir $TESTTMP/pack_key_files3/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level 10 --scuba-log-file pack-individually.json --keys-dir $TESTTMP/pack_key_files1/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level 10 --scuba-log-file pack-individually.json --keys-dir $TESTTMP/pack_key_files2/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level 10 --scuba-log-file pack-individually.json --keys-dir $TESTTMP/pack_key_files3/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
 
 # Check logging for individually packed keys (last 3 digits of the compressed size are matched by glob because they can change on zstd crate updates)
   $ jq -r '.int * .normal | [ .blobstore_id, .blobstore_key, .uncompressed_size, .compressed_size ] | @csv' < pack-individually.json | sort | uniq
@@ -78,7 +78,7 @@
   $ echo 'repo0000.content.blake2.7f4c8284eea7351488400d6fdf82e1c262a81e20d4abd8ee469841d19b60c94a' >> $TESTTMP/pack_key_files4/reporepo.store0.part0.keys.txt
 
 # Pack content into a pack
-  $ packer --zstd-level 19 --scuba-log-file packed.json --keys-dir $TESTTMP/pack_key_files4/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level 19 --scuba-log-file packed.json --keys-dir $TESTTMP/pack_key_files4/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
 
 # Check logging for packed keys (last 3 digits of the compressed size are matched by glob because they can change on zstd crate updates)
   $ jq -r '.int * .normal | [ .blobstore_id, .blobstore_key, .pack_key, .uncompressed_size, .compressed_size ] | @csv' < packed.json | sort | uniq
@@ -125,7 +125,7 @@
   $ echo 'repo0000.alias.sha256.85b856bc2313fcddec8464984ab2d384f61625890ee19e4f909dd80ac36e8fd7' >> $TESTTMP/pack_key_files_aliases/reporepo.store0.part0.keys.txt
   $ echo 'repo0000.alias.sha256.9b798d4eb3901972c1311a3c6a21480e3f29c8c64cd6bbb81a977ecab56452e3' >> $TESTTMP/pack_key_files_aliases/reporepo.store0.part0.keys.txt
 
-  $ packer --zstd-level 19 --keys-dir $TESTTMP/pack_key_files_aliases/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level 19 --keys-dir $TESTTMP/pack_key_files_aliases/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
 
 # Show that they're not packed (hardlink count of 1)
   $ stat -c '%s %h %N' $TESTTMP/blobstore/0/blobs/blob-repo0000.alias.* | sort -n
@@ -152,7 +152,7 @@
   $ echo '' >> $TESTTMP/pack_key_files5/reporepo.store0.part0.keys.txt
   $ echo 'repo0000.content.blake2.7f4c8284eea7351488400d6fdf82e1c262a81e20d4abd8ee469841d19b60c94a' >> $TESTTMP/pack_key_files5/reporepo.store0.part0.keys.txt
 
-  $ packer --zstd-level 19 --keys-dir $TESTTMP/pack_key_files5/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level 19 --keys-dir $TESTTMP/pack_key_files5/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
   $ stat -c '%s %h %N' $TESTTMP/blobstore/0/blobs/blob-repo0000.content.blake2.* | sort -n
   * 1 '$TESTTMP/blobstore/0/blobs/blob-repo0000.content.blake2.7f4c8284eea7351488400d6fdf82e1c262a81e20d4abd8ee469841d19b60c94a.pack' (glob)
   * 2 '$TESTTMP/blobstore/0/blobs/blob-repo0000.content.blake2.4caa3d2f7430890df6f5deb3b652fcc88769e3323c0b7676e9771d172a521bbd.pack' (glob)
diff --git a/eden/mononoke/tests/integration/walker/test-new-walker-pack-info-multiplex.t b/eden/mononoke/tests/integration/walker/test-new-walker-pack-info-multiplex.t
index 13116cb056db6..baee9b4376251 100644
--- a/eden/mononoke/tests/integration/walker/test-new-walker-pack-info-multiplex.t
+++ b/eden/mononoke/tests/integration/walker/test-new-walker-pack-info-multiplex.t
@@ -30,8 +30,8 @@ Set up the key file for packing
   $ (cd blobstore/0/blobs; ls) | sed -e 's/^blob-//' -e 's/.pack$//' >> $TESTTMP/pack_key_files_1/reporepo.store1.part1.keys.txt
 
 Pack the blobs in the two packed stores differently
-  $ packer --zstd-level=3 --keys-dir $TESTTMP/pack_key_files_0/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
-  $ packer --zstd-level=19 --keys-dir $TESTTMP/pack_key_files_1/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level=3 --keys-dir $TESTTMP/pack_key_files_0/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level=19 --keys-dir $TESTTMP/pack_key_files_1/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
 
 Run a scrub, need a scrub action to put ScrubBlobstore in the stack, which is necessary to make sure all the inner stores of the multiplex are read
   $ mononoke_walker -l loaded --blobstore-scrub-action=ReportOnly scrub -q -I deep -i bonsai -i FileContent -b master_bookmark -a all --pack-log-scuba-file pack-info-packed.json 2>&1 | strip_glog
diff --git a/eden/mononoke/tests/integration/walker/test-new-walker-pack-info.t b/eden/mononoke/tests/integration/walker/test-new-walker-pack-info.t
index ecedfecdcf864..32aec9b0d290a 100644
--- a/eden/mononoke/tests/integration/walker/test-new-walker-pack-info.t
+++ b/eden/mononoke/tests/integration/walker/test-new-walker-pack-info.t
@@ -41,7 +41,7 @@ Check logged pack info. Commit time is forced to zero in tests, hence mtime is 0
   $ (cd blobstore/blobs; ls) | sed -e 's/^blob-//' -e 's/.pack$//' >> $TESTTMP/pack_key_files/reporepo.store.part0.keys.txt
 
 Now pack the blobs
-  $ packer --zstd-level=3 --keys-dir $TESTTMP/pack_key_files/ --tuning-info-scuba-table "file://${TESTTMP}/tuning_scuba.json"
+  $ packer --zstd-level=3 --keys-dir $TESTTMP/pack_key_files/ --tuning-info-scuba-log-file "${TESTTMP}/tuning_scuba.json"
 
 Run a scrub again now the storage is packed
   $ mononoke_walker -l loaded scrub -q -I deep -i bonsai -i FileContent -p Changeset --checkpoint-name=bonsai_packed --checkpoint-path=test_sqlite -a all --pack-log-scuba-file pack-info-packed.json 2>&1 | strip_glog