This option excludes seed only downloads when counting concurrent
active downloads (-j option). This means that if -j3 is given and
this option is turned on and 3 downloads are active and one of those
enters seed mode, then it is excluded from active download count (thus
it becomes 2), and the next download waiting in queue gets started.
But be aware that seeding item is still recognized as active download
in RPC method.
This change changes the behavior of --bt-max-open-files. Previously,
it specifies the maximum number of opened files for each multi-file
download. Since it is more useful to limit the number globally, the
option now specifies the global limit. This change suggests that
aria2.changeOption() method now ignores --bt-max-open-files and
aria2.changeGlobalOption now reads it and dynamically change the
limit.
Historically, aria2 did not send HAVE message to the peer which the
piece is coming from, thinking it is obvious that the peer knows we
have the piece. But it is not obvious if one piece is download from
more than 1 peers (e.g., end game mode). So it is better to send HAVE
to all peers connected.
WebSocketSessionMan now implements DownloadEventListener and is added
to Notifier. It becomes member variable of DownloadEngine. The event
constant for download event is defined in aria2.h so that we can add
event callback API later.
On Mingw32 build, if aria2 opens file with GENERIC_WRITE access right,
some programs cannot open the file aria2 is seeding. To avoid this
situation, re-open files with read-only enabled when seeding is about
to begin.
This option enables disk cache. If SIZE is 0, the disk cache is
disabled. This feature caches the downloaded data in memory, which
grows to at most SIZE bytes. The cache storage is created for aria2
instance and shared by all downloads. The one advantage of the disk
cache is reduce the disk seek time because the data is written in
larger unit and it is reordered by the offset of the file. If the
underlying file is heavily fragmented it is not the case.
--file-allocation option can now take new value 'trunc'. 'trunc' uses
ftruncate() system call or platform-specific counterpart to truncate a
file to a specified length.
Previous implementation does not store information which Command cuid
uses which Piece. Mark Piece acquired by SegmentMan by setting
Piece::setUsedBySegment(true).
Nils Maier