tahoe-lafs/trac-2024-07-25

mutable publish: add timing charts to measure RTT #394

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opened 2008-04-24 23:20:23 +00:00 by warner · 2 comments

warner commented

2008-04-24 23:20:23 +00:00

Owner

The first step for this will be better status/visualization tools. Servermap update has a little diagram (using the Google Chart API) of how the queries are spaced out. I'd like to:

make these charts for all mutable file operations
for retrieve, show both the mapupdate queries and the retrieve queries on the same chart
for publish, show mapupdate and publish on the same chart
(maybe) for modify, show everything on the same chart
switch to PIL to get better diagrams and show overlapping queries

I think we may be at 3RTT already, but I'm not sure, and better tools would help me be sure.

We should examine the mutable-file publish process to try and get small files to do read-modify-write in two RTT. Large files should be three RTT (one to update the servermap, a second to read the data, a third to write the data). The first step for this will be better status/visualization tools. Servermap update has a little diagram (using the Google Chart API) of how the queries are spaced out. I'd like to: * make these charts for all mutable file operations * for retrieve, show both the mapupdate queries and the retrieve queries on the same chart * for publish, show mapupdate and publish on the same chart * (maybe) for modify, show everything on the same chart * switch to PIL to get better diagrams and show overlapping queries I think we may be at 3RTT already, but I'm not sure, and better tools would help me be sure.

tahoe-lafs added the

major

task

1.0.0

labels 2008-04-24 23:20:23 +00:00

tahoe-lafs added this to the eventually milestone 2008-04-24 23:20:23 +00:00

warner commented

2008-06-01 20:45:59 +00:00

Author

Owner

I think we're at two RTT for small files, but I still want better diagrams, so I'm changing the title of this ticket.

tahoe-lafs modified the milestone from eventually to undecided

2008-06-01 20:45:59 +00:00

tahoe-lafs changed title from ~~mutable: publish should take two RTT~~ to mutable publish: add timing charts to measure RTT

2008-06-01 20:45:59 +00:00

tahoe-lafs added the

code-mutable

label 2009-12-04 05:07:13 +00:00

zooko commented

2010-05-26 14:51:17 +00:00

Author

Owner

It's really bothering me that mutable file upload and download behavior is so finicky, buggy, inefficient, hard to understand, different from immutable file upload and download behavior, etc. So I'm putting a bunch of tickets into the "1.8" Milestone. I am not, however, at this time, volunteering to work on these tickets, so it might be a mistake to put them into the 1.8 Milestone, but I really hope that someone else will volunteer or that I will decide to do it myself. :-)

tahoe-lafs modified the milestone from undecided to 1.8.0

2010-05-26 14:51:17 +00:00

tahoe-lafs modified the milestone from 1.8.0 to soon

2010-08-10 03:53:20 +00:00