diff options
Diffstat (limited to 'doc/design/assistant')
| -rw-r--r-- | doc/design/assistant/inotify.mdwn | 40 |
1 files changed, 8 insertions, 32 deletions
diff --git a/doc/design/assistant/inotify.mdwn b/doc/design/assistant/inotify.mdwn index 9d3db9192..7fe2a89ce 100644 --- a/doc/design/assistant/inotify.mdwn +++ b/doc/design/assistant/inotify.mdwn @@ -13,6 +13,14 @@ There is a `watch` branch in git that adds the command. * When you `git annex unlock` a file, it will immediately be re-locked. +* With kqueue, added files are not staged because the symlink change event + it's expecting rarely arrives. I think due to a race. + +* With kqueue, if a while is created and still has a writer, it'll + give up adding it, and it will never get added. This is because kqueue + cannot track file closes. Need to go back and check these files every + second or something. + ## beyond Linux I'd also like to support OSX and if possible the BSDs. @@ -58,40 +66,8 @@ I'd also like to support OSX and if possible the BSDs. * Windows has a Win32 ReadDirectoryChangesW, and perhaps other things. -## beyond Linux - -I'd also like to support OSX and if possible the BSDs. - -* kqueue ([haskell bindings](http://hackage.haskell.org/package/kqueue)) - is supported by FreeBSD, OSX, and other BSDs. - - From what I can find, kqueue does not provide full directory watching - capabilities. To watch a file, you have to have an open file descriptor - to the file. This wouldn't scale. - - Gamin does the best it can with just kqueue, supplimented by polling. - The source file `server/gam_kqueue.c` makes for interesting reading. - Using gamin to do the heavy lifting is one option. - ([haskell bindings](http://hackage.haskell.org/package/hlibfam) for FAM; - gamin shares the API) - -* hfsevents ([haskell bindings](http://hackage.haskell.org/package/hfsevents)) - is OSX specific. - - Originally it was only directory level, and you were only told a - directory had changed and not which file. Based on the haskell - binding's code, from OSX 10.7.0, file level events were added. - - This will be harder for me to develop for, since I don't have access to - OSX machines.. - -* Windows has a Win32 ReadDirectoryChangesW, and perhaps other things. - ## todo -- Support OSes other than Linux; it only uses inotify currently. - OSX and FreeBSD use the same mechanism, and there is a Haskell interface - for it, - Run niced and ioniced? Seems to make sense, this is a background job. - configurable option to only annex files meeting certian size or filename criteria |