SCP是否锁定正在传输的文件？

遇到这样的情况，我们的应用程序日志位于AIX服务器上。该日志不断从应用程序写入，并且我们有Windows用户希望查看该文件。他们一直在使用WinSCP将文件传输到桌面，然后使用文本编辑器将其打开。

我认为可能正在发生的事情是scp在传输期间锁定了文件，并且应用程序不再能够写入该文件。我认为这是因为日志文件将在一天中的任意时间停止增长。

那可能是怎么回事？

你为什么不试试这个。开始截取一个大文件，然后lsof /path/to/file在AIX服务器上运行，然后查看FD列的内容。

在lsof手册页中：

   FD         is the File Descriptor number of the file or:
                   cwd  current working directory;
                   Lnn  library references (AIX);
                   err  FD information error (see NAME column);
                   jld  jail directory (FreeBSD);
                   ltx  shared library text (code and data);
                   Mxx  hex memory-mapped type number xx.
                   m86  DOS Merge mapped file;
                   mem  memory-mapped file;
                   mmap memory-mapped device;
                   pd   parent directory;
                   rtd  root directory;
                   tr   kernel trace file (OpenBSD);
                   txt  program text (code and data);
                   v86  VP/ix mapped file;
              FD is followed by one of these characters, describing the mode under which the file is open:
                   r for read access;
                   w for write access;
                   u for read and write access;
                   space if mode unknown and no lock
                        character follows;
                   `-' if mode unknown and lock
                        character follows.
              The mode character is followed by one of these lock characters, describing the type of lock applied to the file:
                   N for a Solaris NFS lock of unknown type;
                   r for read lock on part of the file;
                   R for a read lock on the entire file;
                   w for a write lock on part of the file;
                   W for a write lock on the entire file;
                   u for a read and write lock of any length;
                   U for a lock of unknown type;
                   x for an SCO OpenServer Xenix lock on part of the file;
                   X for an SCO OpenServer Xenix lock on the entire file;
                   space if there is no lock.
              See the LOCKS section for more information on the lock information character.
              The FD column contents constitutes a single field for parsing in post-processing scripts.

如果这样做，至少在Linux上，您会看到FD列为“ 3r”，这意味着它具有某种读锁定，但是我不确定其前面的3意味着什么。

大多数Unix程序不使用锁定或在使用锁定时不是强制性的，因此我怀疑锁定是否会阻止您的日志增长。SCP传输更有可能减慢日志写入速度。