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与远程服务器 rsync 导致媒体播放器出现问题

tag-icon • tag-icon linux ubuntu bash rsync
与远程服务器 rsync 导致媒体播放器出现问题

我有一个运行 Serviio 作为 DLNA 媒体服务器的 ubuntu 服务器。

服务器所做的其他事情几乎就是检查远程服务器上的新媒体。我每分钟都会使用 cron 运行此脚本。

#!/bin/bash
DestDir='/home/vince/media'
lockfile='/home/vince/cron/sync.lock'

if [ ! -e $lockfile ]; then
   trap "rm -f $lockfile; exit" INT TERM EXIT
   touch $lockfile
   nice -n 20 ionice -c 3 rsync -axvmP --rsh="ssh -c arcfour" --progress --delete --include='*/' --include='*.mkv' --include='*.mp4' --include='*.avi' --exclude='*' --log-file='/home/vince/log/sync' ***@***:/home/vince/media/ "$DestDir"
   rm $lockfile
   trap - INT TERM EXIT
   [ $? -eq 0 ] && logger 'RSYNC sync completed successfully' || logger 'RSYNC sync Failed'
else
   echo "script already running"
fi

你看，我使用了更弱的密码，nice 和 ionice，但是如果 rsync 找到一个 6GB 的文件，而我当时正在流式传输媒体，它会导致播放缓冲和跳转。

如果我将此脚本移动到远程服务器并推送数据而不是拉取数据，这会有帮助吗？还是没有什么区别？

还有其他建议吗？

答案1

如果问题出在带宽上，那么请检查 rsync 的选项，例如：

   --bwlimit=KBPS
          This  option  allows  you  to specify a maximum transfer rate in
          kilobytes per second for the data the daemon sends.  The  client
          can still specify a smaller --bwlimit value, but their requested
          value will be rounded down if they try to exceed  it.   See  the
          client version of this option (above) for some extra details.

根据打嗝的原因，也许有以下几种情况：

   -z, --compress
          With this option, rsync compresses the file data as it  is  sent
          to  the  destination  machine,  which reduces the amount of data
          being transmitted â something that is useful over a slow connecâ
          tion.

          Note  that  this  option  typically  achieves better compression
          ratios than can be achieved by using a compressing remote  shell
          or  a  compressing  transport  because it takes advantage of the
          implicit information in the matching data blocks  that  are  not
          explicitly sent over the connection.

          See the --skip-compress option for the default list of file sufâ
          fixes that will not be compressed.

   --compress-level=NUM
          Explicitly set the compression level  to  use  (see  --compress)
          instead  of  letting it default.  If NUM is non-zero, the --comâ
          press option is implied.

   --skip-compress=LIST
          Override the list of file suffixes that will not be  compressed.
          The  LIST  should be one or more file suffixes (without the dot)
          separated by slashes (/).

          You may specify an empty string to indicate that no file  should
          be skipped.

          Simple  character-class matching is supported: each must consist
          of a list of letters inside the square brackets (e.g. no special
          classes, such as â[:alpha:]â

          The  characters  asterisk (*) and question-mark (?) have no speâ
          cial meaning.

          Here's an example that specifies 6 suffixes to skip (since 1  of
          the 5 rules matches 2 suffixes):

              --skip-compress=gz/jpg/mp[34]/7z/bz2

          The default list of suffixes that will not be compressed is this
          (several of these are newly added for 3.0.0):

              gz/zip/z/rpm/deb/iso/bz2/t[gb]z/7z/mp[34]/mov/avi/ogg/jpg/jpeg

          This list will be replaced by your --skip-compress list  in  all
          but  one  situation:  a  copy  from a daemon rsync will add your
          skipped suffixes to its list of non-compressing files  (and  its
          list may be configured to a different default).

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