- Committer: John Arbash Meinel
- Date: 2009-09-09 18:52:56 UTC
- mto: (4634.52.16 2.0)
- Revision ID: john@arbash-meinel.com-20090909185256-rdaxy872xauoem46
Work around bug #402623 by allowing BTreeGraphIndex(...,unlimited_cache=True).
The basic issue is that the access pattern for chk pages is fully random,
because the keys are 'sha1' handles. As such, we have no locality of
reference, and downloading a large project over HTTP can cause us to
redownload all of the .cix pages multiple times. The bug report
noticed the pages getting downloaded 4-5 times.
This was causing a significant increase in the total bytes downloaded.
(For Launchpad, downloading the 10MB cix file 5 times was 50MB, out of
around 160MB total download.)
The basic issue is that the access pattern for chk pages is fully random,
because the keys are 'sha1' handles. As such, we have no locality of
reference, and downloading a large project over HTTP can cause us to
redownload all of the .cix pages multiple times. The bug report
noticed the pages getting downloaded 4-5 times.
This was causing a significant increase in the total bytes downloaded.
(For Launchpad, downloading the 10MB cix file 5 times was 50MB, out of
around 160MB total download.)
| Filename | Latest Rev | Last Changed | Committer | Comment | Size | ||
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bzrlib
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1185.1.29 | 19 years ago | Robert Collins | merge merge tweaks from aaron, which includes late |
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contrib
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1185.1.29 | 19 years ago | Robert Collins | merge merge tweaks from aaron, which includes late |
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doc
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1185.1.29 | 19 years ago | Robert Collins | merge merge tweaks from aaron, which includes late |
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man1
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2425.1.1 | 17 years ago | Robert Collins | ``make docs`` now creates a man page at ``man1/bzr |
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tools
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1185.1.29 | 19 years ago | Robert Collins | merge merge tweaks from aaron, which includes late |
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.bzrignore |
4580.5.3 | 15 years ago | John Arbash Meinel | Change the Makefile to stage things into a build d | 1.2 KB |
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.rsyncexclude |
1185.33.36 | 19 years ago | Martin Pool | Exclude more files from dumb-rsync upload | 203 bytes |
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BRANCH.TODO |
4325.3.4 | 15 years ago | Johan Walles | Merge from upstream. | 150 bytes |
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bzr |
4596.1.2 | 15 years ago | Martin Pool | Bump format to 2.0dev! | 5.6 KB |
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bzr.ico |
3688.3.3 | 16 years ago | John Arbash Meinel | An updated transparent icon for bzr. | 12.7 KB |
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COPYING.txt |
1861.2.9 | 18 years ago | Alexander Belchenko | rename gpl.txt => COPYING.txt | 17.5 KB |
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INSTALL |
2696.2.4 | 17 years ago | Aaron Bentley | Fix typo | 1.4 KB |
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Makefile |
4580.5.14 | 15 years ago | John Arbash Meinel | more updates to get things to build cleanly. 1) d | 12.2 KB |
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NEWS |
4634.71.1 | 15 years ago | John Arbash Meinel | Work around bug #402623 by allowing BTreeGraphInde | 382 KB |
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profile_imports.py |
4183.7.1 | 15 years ago | Sabin Iacob | update FSF mailing address | 5.5 KB |
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README |
3286 | 16 years ago | Canonical.com Patch Queue Manager | Start 1.4 development | 3.3 KB |
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setup.py |
4634.31.1 | 15 years ago | Alexander Belchenko | update copyrights in the bzr.exe metadata. | 26.6 KB |
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TODO |
2382.2.5 | 17 years ago | Martin Pool | Contents of TODO file moved into bug tracker | 115 bytes |
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