08-22-2012
Quote:
I agree with this. RAM is cheap; cheaper than hours of analysis.
Isn't that just throwing money at the problem rather than fixing it? What's to say that the memory they put in there isn't just going to be eaten up once it's available? That's like saying the solution to a full root filesystem is always more space. If an admin doesn't know enough about the internal architecture of their application, then they need to go out and learn it. Once you've gotten to the point of "There's no more resource optimization left to do and I know it for sure." then you're at the point where you just flat out need more memory. Even then I wouldn't phrase it as being a crutch, at that point you're just solving the problem the only way possible.
Slightly related example, where I work disk space for the Domino servers was nearly completely exhausted and the admin for the system kept telling everyone that we were heading for a cliff if he didn't get more space allocated from SAN. Well he gets a contractor to come in and turns out that many people have three or four different replicas of the same files, including people who haven't even worked there in years. Now the Domino Admin knows more about Domino, and can better contribute value elsewhere, the databases run more efficiently with quicker backup times, and we managed to avoid having to pay for more disk space than was actually needed. If he had settled for "disk space is cheap" then the problem wouldn't have been uncovered.
Point being that you shouldn't knowingly use something as crutch and then let yourself be surprised by the results down the road.
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BACKUP(8) System Manager's Manual BACKUP(8)
NAME
backup - backup files
SYNOPSIS
backup [-djmnorstvz] dir1 dir2
OPTIONS
-d At top level, only directories are backed up
-j Do not copy junk: *.Z, *.bak, a.out, core, etc
-m If device full, prompt for new diskette
-n Do not backup top-level directories
-o Do not copy *.o files
-r Restore files
-s Do not copy *.s files
-t Preserve creation times
-v Verbose; list files being backed up
-z Compress the files on the backup medium
EXAMPLES
backup -mz . /f0 # Backup current directory compressed
backup /bin /usr/bin
# Backup bin from RAM disk to hard disk
DESCRIPTION
Backup (recursively) backs up the contents of a given directory and its subdirectories to another part of the file system. It has two typ-
ical uses. First, some portion of the file system can be backed up onto 1 or more diskettes. When a diskette fills up, the user is
prompted for a new one. The backups are in the form of mountable file systems. Second, a directory on RAM disk can be backed up onto hard
disk. If the target directory is empty, the entire source directory is copied there, optionally compressed to save space. If the target
directory is an old backup, only those files in the target directory that are older than similar names in the source directory are
replaced. Backup uses times for this purpose, like make. Calling Backup as Restore is equivalent to using the -r option; this replaces
newer files in the target directory with older files from the source directory, uncompressing them if necessary. The target directory con-
tents are thus returned to some previous state.
SEE ALSO
tar(1).
BACKUP(8)