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Operating Systems Linux Running 'sync' command frequently. Post 302875345 by acascianelli on Tuesday 19th of November 2013 09:33:46 AM
Old 11-19-2013
Running 'sync' command frequently.

I have a Linux server that runs a Java based app that automates file transfers for a large number of users/systems. I'm running into a problem with the scripts for this automation program in that when I have a function in the script generate an output file, and the next line requires that file to be present; the script will fail because the file hasn't made it to disk yet. I've figured out some workarounds for this problem. I can either enter a sleep/delay command to delay the whole script for a few seconds giving the system/java a few seconds to write the file to disk; or I can run a sync command that will immediately write the file to disk.

My question is, could there be any undesired side affects to running the 'sync' command so often on a system?
 

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CTRLALTDEL(8)						     Linux Programmer's Manual						     CTRLALTDEL(8)

NAME
ctrlaltdel - set the function of the Ctrl-Alt-Del combination SYNOPSIS
ctrlaltdel hard|soft DESCRIPTION
Based on examination of the linux/kernel/sys.c code, it is clear that there are two supported functions that the Ctrl-Alt-Del sequence can perform: a hard reset, which immediately reboots the computer without calling sync(2) and without any other preparation; and a soft reset, which sends the SIGINT (interrupt) signal to the init process (this is always the process with PID 1). If this option is used, the init(8) program must support this feature. Since there are now several init(8) programs in the Linux community, please consult the documentation for the version that you are currently using. ctrlaltdel is usually used in the /etc/rc.local file. FILES
/etc/rc.local SEE ALSO
simpleinit(8), init(8) AUTHOR
Peter Orbaek (poe@daimi.aau.dk) AVAILABILITY
The ctrlaltdel command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. Linux 1.2 25 October 1993 CTRLALTDEL(8)
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