Changes between Version 1 and Version 2 of Performance

Timestamp:

2007-09-09T00:09:46Z (17 years ago)

Author:

warner

Comment:

--

Performance

@@ -37 +37 @@
 
  1. allocate_buckets
- 1. send_subshare (once per segment)
- 1. send_plaintext_hash_tree
- 1. send_crypttext_hash_tree
- 1. send_subshare_hash_trees
- 1. send_share_hash_trees
- 1. send_UEB
- 1. close
- 1. dirnode update
+ 2. send_subshare (once per segment)
+ 3. send_plaintext_hash_tree
+ 4. send_crypttext_hash_tree
+ 5. send_subshare_hash_trees
+ 6. send_share_hash_trees
+ 7. send_UEB
+ 8. close
+ 9. dirnode update
 
 We need to keep the send_subshare calls sequential (to keep our memory
@@ -50 +50 @@
 update (for robustness and clarity), but the others could be pipelined.
 9*14ms=126ms, which accounts for about 15% of the measured upload time.
+
+Doing steps 2-8 in parallel (using the attached pipeline-sends.diff patch)
+does indeed seem to bring the time-per-file down from 900ms to about 800ms,
+although the results aren't conclusive.
 
 == Storage Servers ==