138
73%

Ran 04 May 2015 09:10PM UTC

Jobs 11

Files 89

Run time 6min

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Build # 138

Build Type

Pull #67

travis-ci

Committed by

takluyver

Commit Message

Alternative way to do atomic writing

This is a hopefully more robust way of doing atomic writing of a file.

Previously, we wrote a new temporary file on each write, and renamed it
over the target file on success. This is technically neat, but
constantly recreating the file causes problems with some network
filesystems, and with sync tools like Dropbox.

The new approach copies the old file contents to a temporary file,
overwrites the target using standard open() and write() calls, and then
removes the temporary file. In case of a failure during writing, the
temporary file is renamed over the target, which should preserve the old
data.

This way, we're only using a new inode in case of a write failure, which
is hopefully rare, instead of on successful writes.

Pull Request Pull Request #67: Alternative way to do atomic writing

Run Details

4165 of 5723 relevant lines covered (72.78%)

2.18 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	138.1 (GROUP=python)	04 May 2015 09:11PM UTC	89	72.48	Travis Job 138.1
2	138.2 (GROUP=js/base)	04 May 2015 09:11PM UTC	0		Travis Job 138.2
3	138.3 (GROUP=js/notebook)	04 May 2015 09:13PM UTC	0		Travis Job 138.3
4	138.4 (GROUP=js/services)	04 May 2015 09:11PM UTC	0		Travis Job 138.4
5	138.5 (GROUP=js/tree)	04 May 2015 09:10PM UTC	0		Travis Job 138.5
6	138.6 (GROUP=python)	04 May 2015 09:14PM UTC	89	72.74	Travis Job 138.6
7	138.7 (GROUP=js/base)	04 May 2015 09:14PM UTC	0		Travis Job 138.7
8	138.8 (GROUP=js/notebook)	04 May 2015 09:16PM UTC	0		Travis Job 138.8
9	138.9 (GROUP=js/services)	04 May 2015 09:15PM UTC	0		Travis Job 138.9
10	138.10 (GROUP=js/tree)	04 May 2015 09:16PM UTC	0		Travis Job 138.10
11	138.11 (GROUP=python)	04 May 2015 09:16PM UTC	89	72.5	Travis Job 138.11

Source Files on build 138

Coverage	∆	File	Lines	Relevant	Covered	Missed	Hits/Line

jupyter / jupyter_notebook / 138
73%

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