Changes between Version 24 and Version 25 of Performance

Timestamp:

2007-12-19T04:13:07Z (18 years ago)

Author:

warner

Comment:

add mostly-download load test data

Performance

@@ -178 +178 @@
 factor than per-byte overhead.
 
+=== test three: 80% upload, 20% download, 1MB mean file size ===
+
+Same environment as test 2, but 80% of the operations are uploads.
+
+{{{
+clients: 150kBps down, 680kBps up, .14 fps down, .67 fps up
+tahoecs1: 62% CPU, 11Mbps out, 2.9Mbps in, load avg .85
+tahoecs2: 57% CPU, 10Mbps out, 4Mbps in, load avg .76
+tahoebs4: 16% CPU, 700kBps out, 5.4Mbps in, load avg 0.4ish
+tahoebs5: 21%, 870kBps out, 5.1Mbps in, load avg about 0.35
+}}}
+
+Overall throughput is about half of the download case. Either uploading files
+or modifying the dirnodes looks to be more expensive than downloading. The
+CPU usage on the web servers was lower, suggesting that the expense might be
+in round trips rather than actual computation.
+
 === initial conclusions ===