annotate TODO @ 121:a0a96e1021c3 noffle

[svn] Performance of group database
author enz
date Wed, 19 Jul 2000 19:20:35 +0100
parents 32ba1198c6fa
children 7c7a7c96d35b
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1 -------------------------------------------------------------------------------
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2 NOFFLE Todolist
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3 -------------------------------------------------------------------------------
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4
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5 Urgent
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6 ------
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8 * Has Client_connect resource leaks if it fails?
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11 Later
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12 -----
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13
121
a0a96e1021c3 [svn] Performance of group database
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14 * Improve performance of group database. Using GDBM is a bad choice,
a0a96e1021c3 [svn] Performance of group database
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15 better use a btree from the Berkeley db library in libc.
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16 This will be a good time for a redesign of the group.h interface
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17 with respect to process concurrency if the simple global locking strategy
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18 will be changed in the future.
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20 * Add "hostname" config option for setting the FQHN in generated message IDs.
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21
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22 * Read timeout when running as server and automatically close if client
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23 does not send data for a longer time.
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24
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25 * Implement simple filter using popen or fifos.
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27 * Make compatible to latest NNTP draft.
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29 * Improve speed of online mode: Keep connection to server open for a while
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31 * Check all in
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32 http://mars.superlink.net/user/tal/writings/news-software-authors.html
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33 (Use NOV library? Use inews for validating posted articles? ... )
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34
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35 * Store requested articles by group + number. This would allow to create
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36 pseudo-groups (like <groupname>.requested) that contained only fully
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37 downloaded articles in overview mode (very nice and clever
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38 idea sent in by a user, it would make using overview mode much easier).
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39 Second advantage: Noffle would work with servers that have retrieving
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40 articles by message-id disabled.
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41
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42 * Expire should clean up empty request/outgoing directories, so they will not
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43 exists forever after a server change.
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44
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45 * Do not log program abortion due to SIGINT, if no inconsistency can occur,
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46 (e.g. when calling 'noffle -d' to a pipe and next program terminates or
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47 pressing ^C).
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48
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49 * Improve www page and documentation.
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50
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51 * Keeping the content list for several lock/unlock times could lead to
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52 inconsistent results, because content list is maybe modified by
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53 pseudo articles. Check this!
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54
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55 * Optimize NEWGROUPS (extra list?)
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56
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57 * Add noffle query option for checking all groups, if they are still
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58 available at the remote server(s) and delete them otherwise.
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59
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60 * In online mode, retrieve full article header from remote server if client
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61 sends a HEAD command. Presently, only the header lines from the overview
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62 are returned and the article is only retrieved on an ARTICLE or BODY command.
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63 The reason for this was that some readers (like pine) retrieve the group
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64 overview by sending lots of HEAD commands and their performance would badly
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65 suffer. On the other hand, some readers (like slrn) cache the header from
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66 a HEAD command, even if a following ARTICLE command gets more header lines,
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67 so that not all header lines are available when reading news in online mode,
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68 before the next start of the reader. But some header lines (e.g. Reply-To)
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69 are important.
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70 Maybe make the behaviour configurable.
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73 Some day far away
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74 -----------------
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75
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76 * Understand supersedes header (useful for reading news.answers group)
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77
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78 * Get and execute cancel messages (read control.cancel, but use xpat to get
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79 only cancels for groups in fetchlist). Seems to be expensive (20000 headers
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80 a day, takes the remote server to search through)
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81