Multiple FTP scripts submitted to a subprocess


 
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Old 02-11-2005
Question Multiple FTP scripts submitted to a subprocess

Why does running 5 FTP scripts sequentially take longer to run (16 seconds)
than when all 5 are submitted to a subprocess and run simultaneously (7 seconds)?
I would think there would be some I/O contention.
There are about 10 files to be FTP'd in each script.
Although each script connects to the same FTP site,
each script writes to a separate directory.
I tried just one FTP script and just changed directories before putting the files,
but it still took about 16 seconds.
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FTP_SET_OPTION(3)							 1							 FTP_SET_OPTION(3)

ftp_set_option - Set miscellaneous runtime FTP options

SYNOPSIS
bool ftp_set_option (resource $ftp_stream, int $option, mixed $value) DESCRIPTION
This function controls various runtime options for the specified FTP stream. PARAMETERS
o $ftp_stream - The link identifier of the FTP connection. o $option - Currently, the following options are supported: Supported runtime FTP options +----------------+---------------------------------------------------+ | | | |FTP_TIMEOUT_SEC | | | | | | | Changes the timeout in seconds used for all net- | | | work related functions. $value must be an integer | | | that is greater than 0. The default timeout is 90 | | | seconds. | | | | | | | | FTP_AUTOSEEK | | | | | | | When enabled, GET or PUT requests with a | | | $resumepos or $startpos parameter will first seek | | | to the requested position within the file. This | | | is enabled by default. | | | | +----------------+---------------------------------------------------+ o $value - This parameter depends on which $option is chosen to be altered. RETURN VALUES
Returns TRUE if the option could be set; FALSE if not. A warning message will be thrown if the $option is not supported or the passed $value doesn't match the expected value for the given $option. EXAMPLES
Example #1 ftp_set_option(3) example <?php // Set the network timeout to 10 seconds ftp_set_option($conn_id, FTP_TIMEOUT_SEC, 10); ?> SEE ALSO
ftp_get_option(3). PHP Documentation Group FTP_SET_OPTION(3)