[tahoe-dev] [tahoe-lafs] #637: support "keep this much disk space free" on Windows as well as other platforms

[tahoe-lafs]

#637: support "keep this much disk space free" on Windows as well as other
platforms
--------------------------+-------------------------------------------------
 Reporter:  zooko         |           Owner:       
     Type:  defect        |          Status:  new  
 Priority:  major         |       Milestone:  1.3.1
Component:  code-storage  |         Version:  1.3.0
 Keywords:  win32         |   Launchpad_bug:       
--------------------------+-------------------------------------------------
 This patch [20090220220353-4233b-24ec3c21004366dbb38ac28ec1fccce44f693b7b]
 makes it so that if we don't know how to find out the free disk space on a
 platform, we fall back gracefully by display something like "I dunno"
 instead of the free disk space.  We also already have code (before that
 patch) which falls back gracefully in the sense of emitting a warning at
 startup if the {{{reserved_space}}} feature has been configured (see
 [src:doc/configuration.txt]) and the current platform can't figure out how
 much free disk space it has.

 However, rather than having such fallbacks, I would really rather just
 ensure that Tahoe figures out how much free disk space it has on all
 supported platforms.  For Windows (the only platform which currently does
 work using {{{statvfs}}}), the way to do that is to require {{{pywin32}}},
 {{{import win32api}}}, and call {{{win32api.GetDiskFreeSpaceEx()}}}

 http://docs.activestate.com/activepython/2.5/pywin32/win32api__GetDiskFreeSpaceEx_meth.html
 http://msdn.microsoft.com/en-us/library/aa364937(VS.85).aspx

 Careful, don't call {{{win32api.GetDiskFreeSpace()}}} -- that's an old
 function that predates disks with more than 2^32 bytes:
 http://msdn.microsoft.com/en-us/library/aa364935.aspx

-- 
Ticket URL: <http://allmydata.org/trac/tahoe/ticket/637>
tahoe-lafs <http://allmydata.org>
secure decentralized file storage grid